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91c60b5790
Move Ray-tracing core from OpenGl_Workspace to OpenGl_View. This patch also contains a number of useful architectural changes.
2416 lines
91 KiB
C++
2416 lines
91 KiB
C++
// Created on: 2015-02-20
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// Created by: Denis BOGOLEPOV
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// Copyright (c) 2015 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <Graphic3d_TextureParams.hxx>
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#include <OpenGl_FrameBuffer.hxx>
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#include <OpenGl_PrimitiveArray.hxx>
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#include <OpenGl_VertexBuffer.hxx>
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#include <OpenGl_View.hxx>
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#include <OSD_Protection.hxx>
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#include <OSD_File.hxx>
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using namespace OpenGl_Raytrace;
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//! Use this macro to output ray-tracing debug info
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// #define RAY_TRACE_PRINT_INFO
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#ifdef RAY_TRACE_PRINT_INFO
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#include <OSD_Timer.hxx>
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#endif
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// =======================================================================
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// function : UpdateRaytraceGeometry
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// purpose : Updates 3D scene geometry for ray-tracing
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// =======================================================================
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Standard_Boolean OpenGl_View::updateRaytraceGeometry (const RaytraceUpdateMode theMode,
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const Standard_Integer theViewId,
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const Handle(OpenGl_Context)& theGlContext)
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{
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// In 'check' mode (OpenGl_GUM_CHECK) the scene geometry is analyzed for
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// modifications. This is light-weight procedure performed on each frame
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if (theMode == OpenGl_GUM_CHECK)
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{
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if (myLayersModificationStatus != myZLayers.ModificationState())
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{
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return updateRaytraceGeometry (OpenGl_GUM_PREPARE, theViewId, theGlContext);
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}
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}
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else if (theMode == OpenGl_GUM_PREPARE)
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{
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myRaytraceGeometry.ClearMaterials();
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myArrayToTrianglesMap.clear();
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myIsRaytraceDataValid = Standard_False;
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}
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// The set of processed structures (reflected to ray-tracing)
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// This set is used to remove out-of-date records from the
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// hash map of structures
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std::set<const OpenGl_Structure*> anElements;
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// Set to store all currently visible OpenGL primitive arrays
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// applicable for ray-tracing
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std::set<Standard_Size> anArrayIDs;
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const OpenGl_Layer& aLayer = myZLayers.Layer (Graphic3d_ZLayerId_Default);
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if (aLayer.NbStructures() != 0)
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{
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const OpenGl_ArrayOfStructure& aStructArray = aLayer.ArrayOfStructures();
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for (Standard_Integer anIndex = 0; anIndex < aStructArray.Length(); ++anIndex)
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{
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for (OpenGl_SequenceOfStructure::Iterator aStructIt (aStructArray (anIndex)); aStructIt.More(); aStructIt.Next())
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{
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const OpenGl_Structure* aStructure = aStructIt.Value();
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if (theMode == OpenGl_GUM_CHECK)
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{
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if (toUpdateStructure (aStructure))
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{
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return updateRaytraceGeometry (OpenGl_GUM_PREPARE, theViewId, theGlContext);
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}
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}
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else if (theMode == OpenGl_GUM_PREPARE)
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{
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if (!aStructure->IsRaytracable() || !aStructure->IsVisible())
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{
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continue;
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}
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else if (!aStructure->ViewAffinity.IsNull() && !aStructure->ViewAffinity->IsVisible (theViewId))
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{
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continue;
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}
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for (OpenGl_Structure::GroupIterator aGroupIter (aStructure->DrawGroups()); aGroupIter.More(); aGroupIter.Next())
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{
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// Extract OpenGL elements from the group (primitives arrays)
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for (const OpenGl_ElementNode* aNode = aGroupIter.Value()->FirstNode(); aNode != NULL; aNode = aNode->next)
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{
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OpenGl_PrimitiveArray* aPrimArray = dynamic_cast<OpenGl_PrimitiveArray*> (aNode->elem);
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if (aPrimArray != NULL)
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{
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anArrayIDs.insert (aPrimArray->GetUID());
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}
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}
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}
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}
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else if (theMode == OpenGl_GUM_REBUILD)
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{
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if (!aStructure->IsRaytracable())
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{
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continue;
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}
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else if (addRaytraceStructure (aStructure, theGlContext))
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{
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anElements.insert (aStructure); // structure was processed
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}
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}
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}
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}
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}
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if (theMode == OpenGl_GUM_PREPARE)
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{
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BVH_ObjectSet<Standard_ShortReal, 3>::BVH_ObjectList anUnchangedObjects;
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// Filter out unchanged objects so only their transformations and materials
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// will be updated (and newly added objects will be processed from scratch)
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for (Standard_Integer anObjIdx = 0; anObjIdx < myRaytraceGeometry.Size(); ++anObjIdx)
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{
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OpenGl_TriangleSet* aTriangleSet = dynamic_cast<OpenGl_TriangleSet*> (
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myRaytraceGeometry.Objects().ChangeValue (anObjIdx).operator->());
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if (aTriangleSet == NULL)
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{
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continue;
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}
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if (anArrayIDs.find (aTriangleSet->AssociatedPArrayID()) != anArrayIDs.end())
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{
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anUnchangedObjects.Append (myRaytraceGeometry.Objects().Value (anObjIdx));
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myArrayToTrianglesMap[aTriangleSet->AssociatedPArrayID()] = aTriangleSet;
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}
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}
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myRaytraceGeometry.Objects() = anUnchangedObjects;
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return updateRaytraceGeometry (OpenGl_GUM_REBUILD, theViewId, theGlContext);
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}
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else if (theMode == OpenGl_GUM_REBUILD)
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{
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// Actualize the hash map of structures - remove out-of-date records
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std::map<const OpenGl_Structure*, Standard_Size>::iterator anIter = myStructureStates.begin();
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while (anIter != myStructureStates.end())
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{
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if (anElements.find (anIter->first) == anElements.end())
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{
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myStructureStates.erase (anIter++);
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}
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else
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{
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++anIter;
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}
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}
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// Actualize OpenGL layer list state
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myLayersModificationStatus = myZLayers.ModificationState();
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// Rebuild two-level acceleration structure
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myRaytraceGeometry.ProcessAcceleration();
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myRaytraceSceneRadius = 2.f /* scale factor */ * std::max (
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myRaytraceGeometry.Box().CornerMin().cwiseAbs().maxComp(),
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myRaytraceGeometry.Box().CornerMax().cwiseAbs().maxComp());
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const BVH_Vec3f aSize = myRaytraceGeometry.Box().Size();
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myRaytraceSceneEpsilon = Max (1.0e-6f, 1.0e-4f * aSize.Modulus());
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return uploadRaytraceData (theGlContext);
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}
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return Standard_True;
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}
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// =======================================================================
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// function : ToUpdateStructure
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// purpose : Checks to see if the structure is modified
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// =======================================================================
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Standard_Boolean OpenGl_View::toUpdateStructure (const OpenGl_Structure* theStructure)
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{
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if (!theStructure->IsRaytracable())
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{
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if (theStructure->ModificationState() > 0)
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{
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theStructure->ResetModificationState();
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return Standard_True; // ray-trace element was removed - need to rebuild
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}
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return Standard_False; // did not contain ray-trace elements
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}
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std::map<const OpenGl_Structure*, Standard_Size>::iterator aStructState = myStructureStates.find (theStructure);
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if (aStructState != myStructureStates.end())
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{
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return aStructState->second != theStructure->ModificationState();
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}
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return Standard_True;
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}
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// =======================================================================
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// function : BuildTextureTransform
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// purpose : Constructs texture transformation matrix
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// =======================================================================
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void BuildTextureTransform (const Handle(Graphic3d_TextureParams)& theParams, BVH_Mat4f& theMatrix)
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{
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theMatrix.InitIdentity();
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// Apply scaling
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const Graphic3d_Vec2& aScale = theParams->Scale();
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theMatrix.ChangeValue (0, 0) *= aScale.x();
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theMatrix.ChangeValue (1, 0) *= aScale.x();
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theMatrix.ChangeValue (2, 0) *= aScale.x();
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theMatrix.ChangeValue (3, 0) *= aScale.x();
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theMatrix.ChangeValue (0, 1) *= aScale.y();
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theMatrix.ChangeValue (1, 1) *= aScale.y();
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theMatrix.ChangeValue (2, 1) *= aScale.y();
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theMatrix.ChangeValue (3, 1) *= aScale.y();
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// Apply translation
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const Graphic3d_Vec2 aTrans = -theParams->Translation();
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theMatrix.ChangeValue (0, 3) = theMatrix.GetValue (0, 0) * aTrans.x() +
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theMatrix.GetValue (0, 1) * aTrans.y();
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theMatrix.ChangeValue (1, 3) = theMatrix.GetValue (1, 0) * aTrans.x() +
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theMatrix.GetValue (1, 1) * aTrans.y();
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theMatrix.ChangeValue (2, 3) = theMatrix.GetValue (2, 0) * aTrans.x() +
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theMatrix.GetValue (2, 1) * aTrans.y();
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// Apply rotation
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const Standard_ShortReal aSin = std::sin (
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-theParams->Rotation() * static_cast<Standard_ShortReal> (M_PI / 180.0));
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const Standard_ShortReal aCos = std::cos (
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-theParams->Rotation() * static_cast<Standard_ShortReal> (M_PI / 180.0));
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BVH_Mat4f aRotationMat;
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aRotationMat.SetValue (0, 0, aCos);
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aRotationMat.SetValue (1, 1, aCos);
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aRotationMat.SetValue (0, 1, -aSin);
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aRotationMat.SetValue (1, 0, aSin);
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theMatrix = theMatrix * aRotationMat;
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}
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// =======================================================================
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// function : ConvertMaterial
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// purpose : Creates ray-tracing material properties
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// =======================================================================
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OpenGl_RaytraceMaterial OpenGl_View::convertMaterial (const OpenGl_AspectFace* theAspect,
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const Handle(OpenGl_Context)& theGlContext)
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{
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OpenGl_RaytraceMaterial theMaterial;
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const OPENGL_SURF_PROP& aProperties = theAspect->IntFront();
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theMaterial.Ambient = BVH_Vec4f (
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(aProperties.isphysic ? aProperties.ambcol.rgb[0] : aProperties.matcol.rgb[0]) * aProperties.amb,
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(aProperties.isphysic ? aProperties.ambcol.rgb[1] : aProperties.matcol.rgb[1]) * aProperties.amb,
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(aProperties.isphysic ? aProperties.ambcol.rgb[2] : aProperties.matcol.rgb[2]) * aProperties.amb,
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1.f);
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theMaterial.Diffuse = BVH_Vec4f (
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(aProperties.isphysic ? aProperties.difcol.rgb[0] : aProperties.matcol.rgb[0]) * aProperties.diff,
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(aProperties.isphysic ? aProperties.difcol.rgb[1] : aProperties.matcol.rgb[1]) * aProperties.diff,
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(aProperties.isphysic ? aProperties.difcol.rgb[2] : aProperties.matcol.rgb[2]) * aProperties.diff,
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-1.f /* no texture */);
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theMaterial.Specular = BVH_Vec4f (
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(aProperties.isphysic ? aProperties.speccol.rgb[0] : 1.f) * aProperties.spec,
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(aProperties.isphysic ? aProperties.speccol.rgb[1] : 1.f) * aProperties.spec,
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(aProperties.isphysic ? aProperties.speccol.rgb[2] : 1.f) * aProperties.spec,
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aProperties.shine);
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theMaterial.Emission = BVH_Vec4f (
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(aProperties.isphysic ? aProperties.emscol.rgb[0] : aProperties.matcol.rgb[0]) * aProperties.emsv,
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(aProperties.isphysic ? aProperties.emscol.rgb[1] : aProperties.matcol.rgb[1]) * aProperties.emsv,
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(aProperties.isphysic ? aProperties.emscol.rgb[2] : aProperties.matcol.rgb[2]) * aProperties.emsv,
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1.f);
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theMaterial.Transparency = BVH_Vec4f (aProperties.trans,
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1.f - aProperties.trans,
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aProperties.index == 0 ? 1.f : aProperties.index,
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aProperties.index == 0 ? 1.f : 1.f / aProperties.index);
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const Standard_ShortReal aMaxRefl = Max (theMaterial.Diffuse.x() + theMaterial.Specular.x(),
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Max (theMaterial.Diffuse.y() + theMaterial.Specular.y(),
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theMaterial.Diffuse.z() + theMaterial.Specular.z()));
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const Standard_ShortReal aReflectionScale = 0.75f / aMaxRefl;
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theMaterial.Reflection = BVH_Vec4f (
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aProperties.speccol.rgb[0] * aProperties.spec * aReflectionScale,
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aProperties.speccol.rgb[1] * aProperties.spec * aReflectionScale,
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aProperties.speccol.rgb[2] * aProperties.spec * aReflectionScale,
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0.f);
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if (theAspect->DoTextureMap())
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{
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if (theGlContext->arbTexBindless != NULL)
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{
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BuildTextureTransform (theAspect->TextureParams(), theMaterial.TextureTransform);
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// write texture ID in the w-component
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theMaterial.Diffuse.w() = static_cast<Standard_ShortReal> (
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myRaytraceGeometry.AddTexture (theAspect->TextureRes (theGlContext)));
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}
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else if (!myIsRaytraceWarnTextures)
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{
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const TCollection_ExtendedString aWarnMessage =
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"Warning: texturing in Ray-Trace requires GL_ARB_bindless_texture extension which is missing. "
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"Please try to update graphics card driver. At the moment textures will be ignored.";
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theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
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GL_DEBUG_TYPE_PORTABILITY_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB, aWarnMessage);
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myIsRaytraceWarnTextures = Standard_True;
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}
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}
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return theMaterial;
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}
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// =======================================================================
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// function : AddRaytraceStructure
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// purpose : Adds OpenGL structure to ray-traced scene geometry
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// =======================================================================
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Standard_Boolean OpenGl_View::addRaytraceStructure (const OpenGl_Structure* theStructure,
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const Handle(OpenGl_Context)& theGlContext)
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{
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if (!theStructure->IsVisible())
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{
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myStructureStates[theStructure] = theStructure->ModificationState();
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return Standard_True;
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}
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// Get structure material
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Standard_Integer aStructMatID = -1;
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if (theStructure->AspectFace() != NULL)
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{
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aStructMatID = static_cast<Standard_Integer> (myRaytraceGeometry.Materials.size());
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OpenGl_RaytraceMaterial aStructMaterial = convertMaterial (theStructure->AspectFace(), theGlContext);
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myRaytraceGeometry.Materials.push_back (aStructMaterial);
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}
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Standard_ShortReal aStructTransform[16];
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if (theStructure->Transformation()->mat != NULL)
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{
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for (Standard_Integer i = 0; i < 4; ++i)
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{
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for (Standard_Integer j = 0; j < 4; ++j)
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{
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aStructTransform[j * 4 + i] = theStructure->Transformation()->mat[i][j];
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}
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}
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}
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Standard_Boolean aResult = addRaytraceGroups (theStructure, aStructMatID,
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theStructure->Transformation()->mat ? aStructTransform : NULL, theGlContext);
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// Process all connected OpenGL structures
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for (OpenGl_ListOfStructure::Iterator anIts (theStructure->ConnectedStructures()); anIts.More(); anIts.Next())
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{
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if (anIts.Value()->IsRaytracable())
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{
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aResult &= addRaytraceGroups (anIts.Value(), aStructMatID,
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theStructure->Transformation()->mat ? aStructTransform : NULL, theGlContext);
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}
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}
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myStructureStates[theStructure] = theStructure->ModificationState();
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return aResult;
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}
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// =======================================================================
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// function : AddRaytraceGroups
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// purpose : Adds OpenGL groups to ray-traced scene geometry
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// =======================================================================
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Standard_Boolean OpenGl_View::addRaytraceGroups (const OpenGl_Structure* theStructure,
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const Standard_Integer theStructMat,
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const Standard_ShortReal* theTransform,
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const Handle(OpenGl_Context)& theGlContext)
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{
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for (OpenGl_Structure::GroupIterator aGroupIter (theStructure->DrawGroups()); aGroupIter.More(); aGroupIter.Next())
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{
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// Get group material
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Standard_Integer aGroupMatID = -1;
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if (aGroupIter.Value()->AspectFace() != NULL)
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{
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aGroupMatID = static_cast<Standard_Integer> (myRaytraceGeometry.Materials.size());
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OpenGl_RaytraceMaterial aGroupMaterial = convertMaterial (
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aGroupIter.Value()->AspectFace(), theGlContext);
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myRaytraceGeometry.Materials.push_back (aGroupMaterial);
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}
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Standard_Integer aMatID = aGroupMatID < 0 ? theStructMat : aGroupMatID;
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if (aMatID < 0)
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{
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aMatID = static_cast<Standard_Integer> (myRaytraceGeometry.Materials.size());
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myRaytraceGeometry.Materials.push_back (OpenGl_RaytraceMaterial());
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}
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// Add OpenGL elements from group (extract primitives arrays and aspects)
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for (const OpenGl_ElementNode* aNode = aGroupIter.Value()->FirstNode(); aNode != NULL; aNode = aNode->next)
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{
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OpenGl_AspectFace* anAspect = dynamic_cast<OpenGl_AspectFace*> (aNode->elem);
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if (anAspect != NULL)
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{
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aMatID = static_cast<Standard_Integer> (myRaytraceGeometry.Materials.size());
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OpenGl_RaytraceMaterial aMaterial = convertMaterial (anAspect, theGlContext);
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myRaytraceGeometry.Materials.push_back (aMaterial);
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}
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else
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{
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OpenGl_PrimitiveArray* aPrimArray = dynamic_cast<OpenGl_PrimitiveArray*> (aNode->elem);
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if (aPrimArray != NULL)
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{
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std::map<Standard_Size, OpenGl_TriangleSet*>::iterator aSetIter = myArrayToTrianglesMap.find (aPrimArray->GetUID());
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if (aSetIter != myArrayToTrianglesMap.end())
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{
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OpenGl_TriangleSet* aSet = aSetIter->second;
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BVH_Transform<Standard_ShortReal, 4>* aTransform = new BVH_Transform<Standard_ShortReal, 4>();
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if (theTransform != NULL)
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{
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aTransform->SetTransform (*(reinterpret_cast<const BVH_Mat4f*> (theTransform)));
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}
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aSet->SetProperties (aTransform);
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if (aSet->MaterialIndex() != OpenGl_TriangleSet::INVALID_MATERIAL && aSet->MaterialIndex() != aMatID)
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{
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aSet->SetMaterialIndex (aMatID);
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}
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}
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else
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{
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NCollection_Handle<BVH_Object<Standard_ShortReal, 3> > aSet =
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addRaytracePrimitiveArray (aPrimArray, aMatID, 0);
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if (!aSet.IsNull())
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{
|
|
BVH_Transform<Standard_ShortReal, 4>* aTransform = new BVH_Transform<Standard_ShortReal, 4>;
|
|
|
|
if (theTransform != NULL)
|
|
{
|
|
aTransform->SetTransform (*(reinterpret_cast<const BVH_Mat4f*> (theTransform)));
|
|
}
|
|
|
|
aSet->SetProperties (aTransform);
|
|
|
|
myRaytraceGeometry.Objects().Append (aSet);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytracePrimitiveArray
|
|
// purpose : Adds OpenGL primitive array to ray-traced scene geometry
|
|
// =======================================================================
|
|
OpenGl_TriangleSet* OpenGl_View::addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
|
|
const Standard_Integer theMaterial,
|
|
const OpenGl_Mat4* theTransform)
|
|
{
|
|
const Handle(Graphic3d_BoundBuffer)& aBounds = theArray->Bounds();
|
|
const Handle(Graphic3d_IndexBuffer)& anIndices = theArray->Indices();
|
|
const Handle(Graphic3d_Buffer)& anAttribs = theArray->Attributes();
|
|
|
|
if (theArray->DrawMode() < GL_TRIANGLES
|
|
#ifndef GL_ES_VERSION_2_0
|
|
|| theArray->DrawMode() > GL_POLYGON
|
|
#else
|
|
|| theArray->DrawMode() > GL_TRIANGLE_FAN
|
|
#endif
|
|
|| anAttribs.IsNull())
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
OpenGl_Mat4 aNormalMatrix;
|
|
|
|
if (theTransform != NULL)
|
|
{
|
|
Standard_ASSERT_RETURN (theTransform->Inverted (aNormalMatrix),
|
|
"Error: Failed to compute normal transformation matrix", NULL);
|
|
|
|
aNormalMatrix.Transpose();
|
|
}
|
|
|
|
OpenGl_TriangleSet* aSet = new OpenGl_TriangleSet (theArray->GetUID());
|
|
{
|
|
aSet->Vertices.reserve (anAttribs->NbElements);
|
|
aSet->Normals.reserve (anAttribs->NbElements);
|
|
aSet->TexCrds.reserve (anAttribs->NbElements);
|
|
|
|
const size_t aVertFrom = aSet->Vertices.size();
|
|
|
|
for (Standard_Integer anAttribIter = 0; anAttribIter < anAttribs->NbAttributes; ++anAttribIter)
|
|
{
|
|
const Graphic3d_Attribute& anAttrib = anAttribs->Attribute (anAttribIter);
|
|
const size_t anOffset = anAttribs->AttributeOffset (anAttribIter);
|
|
if (anAttrib.Id == Graphic3d_TOA_POS)
|
|
{
|
|
if (anAttrib.DataType == Graphic3d_TOD_VEC3
|
|
|| anAttrib.DataType == Graphic3d_TOD_VEC4)
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
aSet->Vertices.push_back (
|
|
*reinterpret_cast<const Graphic3d_Vec3*> (anAttribs->value (aVertIter) + anOffset));
|
|
}
|
|
}
|
|
else if (anAttrib.DataType == Graphic3d_TOD_VEC2)
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
const Standard_ShortReal* aCoords =
|
|
reinterpret_cast<const Standard_ShortReal*> (anAttribs->value (aVertIter) + anOffset);
|
|
|
|
aSet->Vertices.push_back (BVH_Vec3f (aCoords[0], aCoords[1], 0.0f));
|
|
}
|
|
}
|
|
}
|
|
else if (anAttrib.Id == Graphic3d_TOA_NORM)
|
|
{
|
|
if (anAttrib.DataType == Graphic3d_TOD_VEC3
|
|
|| anAttrib.DataType == Graphic3d_TOD_VEC4)
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
aSet->Normals.push_back (
|
|
*reinterpret_cast<const Graphic3d_Vec3*> (anAttribs->value (aVertIter) + anOffset));
|
|
}
|
|
}
|
|
}
|
|
else if (anAttrib.Id == Graphic3d_TOA_UV)
|
|
{
|
|
if (anAttrib.DataType == Graphic3d_TOD_VEC2)
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
aSet->TexCrds.push_back (
|
|
*reinterpret_cast<const Graphic3d_Vec2*> (anAttribs->value (aVertIter) + anOffset));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aSet->Normals.size() != aSet->Vertices.size())
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
aSet->Normals.push_back (BVH_Vec3f());
|
|
}
|
|
}
|
|
|
|
if (aSet->TexCrds.size() != aSet->Vertices.size())
|
|
{
|
|
for (Standard_Integer aVertIter = 0; aVertIter < anAttribs->NbElements; ++aVertIter)
|
|
{
|
|
aSet->TexCrds.push_back (BVH_Vec2f());
|
|
}
|
|
}
|
|
|
|
if (theTransform != NULL)
|
|
{
|
|
for (size_t aVertIter = aVertFrom; aVertIter < aSet->Vertices.size(); ++aVertIter)
|
|
{
|
|
BVH_Vec3f& aVertex = aSet->Vertices[aVertIter];
|
|
|
|
BVH_Vec4f aTransVertex = *theTransform *
|
|
BVH_Vec4f (aVertex.x(), aVertex.y(), aVertex.z(), 1.f);
|
|
|
|
aVertex = BVH_Vec3f (aTransVertex.x(), aTransVertex.y(), aTransVertex.z());
|
|
}
|
|
for (size_t aVertIter = aVertFrom; aVertIter < aSet->Normals.size(); ++aVertIter)
|
|
{
|
|
BVH_Vec3f& aNormal = aSet->Normals[aVertIter];
|
|
|
|
BVH_Vec4f aTransNormal = aNormalMatrix *
|
|
BVH_Vec4f (aNormal.x(), aNormal.y(), aNormal.z(), 0.f);
|
|
|
|
aNormal = BVH_Vec3f (aTransNormal.x(), aTransNormal.y(), aTransNormal.z());
|
|
}
|
|
}
|
|
|
|
if (!aBounds.IsNull())
|
|
{
|
|
for (Standard_Integer aBound = 0, aBoundStart = 0; aBound < aBounds->NbBounds; ++aBound)
|
|
{
|
|
const Standard_Integer aVertNum = aBounds->Bounds[aBound];
|
|
|
|
if (!addRaytraceVertexIndices (*aSet, theMaterial, aVertNum, aBoundStart, *theArray))
|
|
{
|
|
delete aSet;
|
|
return NULL;
|
|
}
|
|
|
|
aBoundStart += aVertNum;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const Standard_Integer aVertNum = !anIndices.IsNull() ? anIndices->NbElements : anAttribs->NbElements;
|
|
|
|
if (!addRaytraceVertexIndices (*aSet, theMaterial, aVertNum, 0, *theArray))
|
|
{
|
|
delete aSet;
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aSet->Size() != 0)
|
|
{
|
|
aSet->MarkDirty();
|
|
}
|
|
|
|
return aSet;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceVertexIndices
|
|
// purpose : Adds vertex indices to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceVertexIndices (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const OpenGl_PrimitiveArray& theArray)
|
|
{
|
|
switch (theArray.DrawMode())
|
|
{
|
|
case GL_TRIANGLES: return addRaytraceTriangleArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
case GL_TRIANGLE_FAN: return addRaytraceTriangleFanArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
case GL_TRIANGLE_STRIP: return addRaytraceTriangleStripArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
#if !defined(GL_ES_VERSION_2_0)
|
|
case GL_QUAD_STRIP: return addRaytraceQuadrangleStripArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
case GL_QUADS: return addRaytraceQuadrangleArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
case GL_POLYGON: return addRaytracePolygonArray (theSet, theMatID, theCount, theOffset, theArray.Indices());
|
|
#endif
|
|
}
|
|
|
|
return Standard_False;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceTriangleArray
|
|
// purpose : Adds OpenGL triangle array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceTriangleArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 3)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + theCount / 3);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; aVert += 3)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + 0),
|
|
theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; aVert += 3)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + 0, aVert + 1, aVert + 2, theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceTriangleFanArray
|
|
// purpose : Adds OpenGL triangle fan array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceTriangleFanArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 3)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + theCount - 2);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; ++aVert)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (theOffset),
|
|
theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; ++aVert)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theOffset,
|
|
aVert + 1,
|
|
aVert + 2,
|
|
theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceTriangleStripArray
|
|
// purpose : Adds OpenGL triangle strip array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceTriangleStripArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 3)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + theCount - 2);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset, aCW = 0; aVert < theOffset + theCount - 2; ++aVert, aCW = (aCW + 1) % 2)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + aCW ? 1 : 0),
|
|
theIndices->Index (aVert + aCW ? 0 : 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset, aCW = 0; aVert < theOffset + theCount - 2; ++aVert, aCW = (aCW + 1) % 2)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + aCW ? 1 : 0,
|
|
aVert + aCW ? 0 : 1,
|
|
aVert + 2,
|
|
theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceQuadrangleArray
|
|
// purpose : Adds OpenGL quad array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceQuadrangleArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 4)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + theCount / 2);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 3; aVert += 4)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + 0),
|
|
theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + 0),
|
|
theIndices->Index (aVert + 2),
|
|
theIndices->Index (aVert + 3),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 3; aVert += 4)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + 0, aVert + 1, aVert + 2,
|
|
theMatID));
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + 0, aVert + 2, aVert + 3,
|
|
theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytraceQuadrangleStripArray
|
|
// purpose : Adds OpenGL quad strip array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytraceQuadrangleStripArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 4)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + 2 * theCount - 6);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 3; aVert += 2)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + 0),
|
|
theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 3),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 3; aVert += 2)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + 0,
|
|
aVert + 1,
|
|
aVert + 2,
|
|
theMatID));
|
|
|
|
theSet.Elements.push_back (BVH_Vec4i (aVert + 1,
|
|
aVert + 3,
|
|
aVert + 2,
|
|
theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : AddRaytracePolygonArray
|
|
// purpose : Adds OpenGL polygon array to ray-traced scene geometry
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::addRaytracePolygonArray (OpenGl_TriangleSet& theSet,
|
|
const Standard_Integer theMatID,
|
|
const Standard_Integer theCount,
|
|
const Standard_Integer theOffset,
|
|
const Handle(Graphic3d_IndexBuffer)& theIndices)
|
|
{
|
|
if (theCount < 3)
|
|
{
|
|
return Standard_True;
|
|
}
|
|
|
|
theSet.Elements.reserve (theSet.Elements.size() + theCount - 2);
|
|
|
|
if (!theIndices.IsNull())
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; ++aVert)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theIndices->Index (theOffset),
|
|
theIndices->Index (aVert + 1),
|
|
theIndices->Index (aVert + 2),
|
|
theMatID));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Standard_Integer aVert = theOffset; aVert < theOffset + theCount - 2; ++aVert)
|
|
{
|
|
theSet.Elements.push_back (BVH_Vec4i (theOffset,
|
|
aVert + 1,
|
|
aVert + 2,
|
|
theMatID));
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : Source
|
|
// purpose : Returns shader source combined with prefix
|
|
// =======================================================================
|
|
TCollection_AsciiString OpenGl_View::ShaderSource::Source() const
|
|
{
|
|
static const TCollection_AsciiString aVersion = "#version 140";
|
|
|
|
if (myPrefix.IsEmpty())
|
|
{
|
|
return aVersion + "\n" + mySource;
|
|
}
|
|
|
|
return aVersion + "\n" + myPrefix + "\n" + mySource;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : Load
|
|
// purpose : Loads shader source from specified files
|
|
// =======================================================================
|
|
void OpenGl_View::ShaderSource::Load (const TCollection_AsciiString* theFileNames,
|
|
const Standard_Integer theCount)
|
|
{
|
|
mySource.Clear();
|
|
|
|
for (Standard_Integer anIndex = 0; anIndex < theCount; ++anIndex)
|
|
{
|
|
OSD_File aFile (theFileNames[anIndex]);
|
|
|
|
Standard_ASSERT_RETURN (aFile.Exists(),
|
|
"Error: Failed to find shader source file", /* none */);
|
|
|
|
aFile.Open (OSD_ReadOnly, OSD_Protection());
|
|
|
|
TCollection_AsciiString aSource;
|
|
|
|
Standard_ASSERT_RETURN (aFile.IsOpen(),
|
|
"Error: Failed to open shader source file", /* none */);
|
|
|
|
aFile.Read (aSource, (Standard_Integer) aFile.Size());
|
|
|
|
if (!aSource.IsEmpty())
|
|
{
|
|
mySource += TCollection_AsciiString ("\n") + aSource;
|
|
}
|
|
|
|
aFile.Close();
|
|
}
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : GenerateShaderPrefix
|
|
// purpose : Generates shader prefix based on current ray-tracing options
|
|
// =======================================================================
|
|
TCollection_AsciiString OpenGl_View::generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const
|
|
{
|
|
TCollection_AsciiString aPrefixString =
|
|
TCollection_AsciiString ("#define STACK_SIZE ") + TCollection_AsciiString (myRaytraceParameters.StackSize) + "\n" +
|
|
TCollection_AsciiString ("#define NB_BOUNCES ") + TCollection_AsciiString (myRaytraceParameters.NbBounces);
|
|
|
|
if (myRaytraceParameters.TransparentShadows)
|
|
{
|
|
aPrefixString += TCollection_AsciiString ("\n#define TRANSPARENT_SHADOWS");
|
|
}
|
|
|
|
// If OpenGL driver supports bindless textures,
|
|
// activate texturing in ray-tracing mode
|
|
if (theGlContext->arbTexBindless != NULL)
|
|
{
|
|
aPrefixString += TCollection_AsciiString ("\n#define USE_TEXTURES") +
|
|
TCollection_AsciiString ("\n#define MAX_TEX_NUMBER ") + TCollection_AsciiString (OpenGl_RaytraceGeometry::MAX_TEX_NUMBER);
|
|
}
|
|
|
|
return aPrefixString;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : SafeFailBack
|
|
// purpose : Performs safe exit when shaders initialization fails
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::safeFailBack (const TCollection_ExtendedString& theMessage,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB, theMessage);
|
|
|
|
myRaytraceInitStatus = OpenGl_RT_FAIL;
|
|
|
|
releaseRaytraceResources (theGlContext);
|
|
|
|
return Standard_False;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : InitShader
|
|
// purpose : Creates new shader object with specified source
|
|
// =======================================================================
|
|
Handle(OpenGl_ShaderObject) OpenGl_View::initShader (const GLenum theType,
|
|
const ShaderSource& theSource,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
Handle(OpenGl_ShaderObject) aShader = new OpenGl_ShaderObject (theType);
|
|
|
|
if (!aShader->Create (theGlContext))
|
|
{
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString ("Error: Failed to create ") +
|
|
(theType == GL_VERTEX_SHADER ? "vertex" : "fragment") + " shader object";
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB, aMessage);
|
|
|
|
aShader->Release (theGlContext.operator->());
|
|
|
|
return Handle(OpenGl_ShaderObject)();
|
|
}
|
|
|
|
if (!aShader->LoadSource (theGlContext, theSource.Source()))
|
|
{
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString ("Error: Failed to set ") +
|
|
(theType == GL_VERTEX_SHADER ? "vertex" : "fragment") + " shader source";
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB, aMessage);
|
|
|
|
aShader->Release (theGlContext.operator->());
|
|
|
|
return Handle(OpenGl_ShaderObject)();
|
|
}
|
|
|
|
TCollection_AsciiString aBuildLog;
|
|
|
|
if (!aShader->Compile (theGlContext))
|
|
{
|
|
aShader->FetchInfoLog (theGlContext, aBuildLog);
|
|
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString ("Error: Failed to compile ") +
|
|
(theType == GL_VERTEX_SHADER ? "vertex" : "fragment") + " shader object:\n" + aBuildLog;
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB, aMessage);
|
|
|
|
aShader->Release (theGlContext.operator->());
|
|
|
|
return Handle(OpenGl_ShaderObject)();
|
|
}
|
|
else if (theGlContext->caps->glslWarnings)
|
|
{
|
|
aShader->FetchInfoLog (theGlContext, aBuildLog);
|
|
|
|
if (!aBuildLog.IsEmpty() && !aBuildLog.IsEqual ("No errors.\n"))
|
|
{
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString (theType == GL_VERTEX_SHADER ?
|
|
"Vertex" : "Fragment") + " shader was compiled with following warnings:\n" + aBuildLog;
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_PORTABILITY_ARB, 0, GL_DEBUG_SEVERITY_LOW_ARB, aMessage);
|
|
}
|
|
}
|
|
|
|
return aShader;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : InitRaytraceResources
|
|
// purpose : Initializes OpenGL/GLSL shader programs
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::initRaytraceResources (const Graphic3d_CView& theCView, const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
if (myRaytraceInitStatus == OpenGl_RT_FAIL)
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
Standard_Boolean aToRebuildShaders = Standard_False;
|
|
|
|
if (myRaytraceInitStatus == OpenGl_RT_INIT)
|
|
{
|
|
if (!myIsRaytraceDataValid)
|
|
return Standard_True;
|
|
|
|
const Standard_Integer aRequiredStackSize =
|
|
myRaytraceGeometry.HighLevelTreeDepth() + myRaytraceGeometry.BottomLevelTreeDepth();
|
|
|
|
if (myRaytraceParameters.StackSize < aRequiredStackSize)
|
|
{
|
|
myRaytraceParameters.StackSize = Max (aRequiredStackSize, THE_DEFAULT_STACK_SIZE);
|
|
|
|
aToRebuildShaders = Standard_True;
|
|
}
|
|
else
|
|
{
|
|
if (aRequiredStackSize < myRaytraceParameters.StackSize)
|
|
{
|
|
if (myRaytraceParameters.StackSize > THE_DEFAULT_STACK_SIZE)
|
|
{
|
|
myRaytraceParameters.StackSize = Max (aRequiredStackSize, THE_DEFAULT_STACK_SIZE);
|
|
aToRebuildShaders = Standard_True;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (theCView.RenderParams.RaytracingDepth != myRaytraceParameters.NbBounces)
|
|
{
|
|
myRaytraceParameters.NbBounces = theCView.RenderParams.RaytracingDepth;
|
|
aToRebuildShaders = Standard_True;
|
|
}
|
|
|
|
if (theCView.RenderParams.IsTransparentShadowEnabled != myRaytraceParameters.TransparentShadows)
|
|
{
|
|
myRaytraceParameters.TransparentShadows = theCView.RenderParams.IsTransparentShadowEnabled;
|
|
aToRebuildShaders = Standard_True;
|
|
}
|
|
|
|
if (aToRebuildShaders)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Info: Rebuild shaders with stack size: " << myRaytraceParameters.StackSize << std::endl;
|
|
#endif
|
|
|
|
// Change state to force update all uniforms
|
|
myToUpdateEnvironmentMap = Standard_True;
|
|
|
|
TCollection_AsciiString aPrefixString = generateShaderPrefix (theGlContext);
|
|
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "GLSL prefix string:" << std::endl << aPrefixString << std::endl;
|
|
#endif
|
|
|
|
myRaytraceShaderSource.SetPrefix (aPrefixString);
|
|
myPostFSAAShaderSource.SetPrefix (aPrefixString);
|
|
|
|
if (!myRaytraceShader->LoadSource (theGlContext, myRaytraceShaderSource.Source())
|
|
|| !myPostFSAAShader->LoadSource (theGlContext, myPostFSAAShaderSource.Source()))
|
|
{
|
|
return safeFailBack ("Failed to load source into ray-tracing fragment shaders", theGlContext);
|
|
}
|
|
|
|
if (!myRaytraceShader->Compile (theGlContext)
|
|
|| !myPostFSAAShader->Compile (theGlContext))
|
|
{
|
|
return safeFailBack ("Failed to compile ray-tracing fragment shaders", theGlContext);
|
|
}
|
|
|
|
myRaytraceProgram->SetAttributeName (theGlContext, Graphic3d_TOA_POS, "occVertex");
|
|
myPostFSAAProgram->SetAttributeName (theGlContext, Graphic3d_TOA_POS, "occVertex");
|
|
if (!myRaytraceProgram->Link (theGlContext)
|
|
|| !myPostFSAAProgram->Link (theGlContext))
|
|
{
|
|
return safeFailBack ("Failed to initialize vertex attributes for ray-tracing program", theGlContext);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (myRaytraceInitStatus == OpenGl_RT_NONE)
|
|
{
|
|
if (!theGlContext->IsGlGreaterEqual (3, 1))
|
|
{
|
|
return safeFailBack ("Ray-tracing requires OpenGL 3.1 and higher", theGlContext);
|
|
}
|
|
else if (!theGlContext->arbTboRGB32)
|
|
{
|
|
return safeFailBack ("Ray-tracing requires OpenGL 4.0+ or GL_ARB_texture_buffer_object_rgb32 extension", theGlContext);
|
|
}
|
|
else if (!theGlContext->arbFBOBlit)
|
|
{
|
|
return safeFailBack ("Ray-tracing requires EXT_framebuffer_blit extension", theGlContext);
|
|
}
|
|
|
|
myRaytraceParameters.NbBounces = theCView.RenderParams.RaytracingDepth;
|
|
|
|
TCollection_AsciiString aFolder = Graphic3d_ShaderProgram::ShadersFolder();
|
|
|
|
if (aFolder.IsEmpty())
|
|
{
|
|
return safeFailBack ("Failed to locate shaders directory", theGlContext);
|
|
}
|
|
|
|
if (myIsRaytraceDataValid)
|
|
{
|
|
myRaytraceParameters.StackSize = Max (THE_DEFAULT_STACK_SIZE,
|
|
myRaytraceGeometry.HighLevelTreeDepth() + myRaytraceGeometry.BottomLevelTreeDepth());
|
|
}
|
|
|
|
TCollection_AsciiString aPrefixString = generateShaderPrefix (theGlContext);
|
|
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "GLSL prefix string:" << std::endl << aPrefixString << std::endl;
|
|
#endif
|
|
|
|
{
|
|
Handle(OpenGl_ShaderObject) aBasicVertShader = initShader (
|
|
GL_VERTEX_SHADER, ShaderSource (aFolder + "/RaytraceBase.vs"), theGlContext);
|
|
|
|
if (aBasicVertShader.IsNull())
|
|
{
|
|
return safeFailBack ("Failed to initialize ray-trace vertex shader", theGlContext);
|
|
}
|
|
|
|
TCollection_AsciiString aFiles[] = { aFolder + "/RaytraceBase.fs",
|
|
aFolder + "/RaytraceRender.fs" };
|
|
|
|
myRaytraceShaderSource.Load (aFiles, 2);
|
|
|
|
myRaytraceShaderSource.SetPrefix (aPrefixString);
|
|
|
|
myRaytraceShader = initShader (GL_FRAGMENT_SHADER, myRaytraceShaderSource, theGlContext);
|
|
|
|
if (myRaytraceShader.IsNull())
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to initialize ray-trace fragment shader", theGlContext);
|
|
}
|
|
|
|
myRaytraceProgram = new OpenGl_ShaderProgram;
|
|
|
|
if (!myRaytraceProgram->Create (theGlContext))
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to create ray-trace shader program", theGlContext);
|
|
}
|
|
|
|
if (!myRaytraceProgram->AttachShader (theGlContext, aBasicVertShader)
|
|
|| !myRaytraceProgram->AttachShader (theGlContext, myRaytraceShader))
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to attach ray-trace shader objects", theGlContext);
|
|
}
|
|
|
|
myRaytraceProgram->SetAttributeName (theGlContext, Graphic3d_TOA_POS, "occVertex");
|
|
|
|
TCollection_AsciiString aLinkLog;
|
|
|
|
if (!myRaytraceProgram->Link (theGlContext))
|
|
{
|
|
myRaytraceProgram->FetchInfoLog (theGlContext, aLinkLog);
|
|
|
|
return safeFailBack (TCollection_ExtendedString (
|
|
"Failed to link ray-trace shader program:\n") + aLinkLog, theGlContext);
|
|
}
|
|
else if (theGlContext->caps->glslWarnings)
|
|
{
|
|
myRaytraceProgram->FetchInfoLog (theGlContext, aLinkLog);
|
|
|
|
if (!aLinkLog.IsEmpty() && !aLinkLog.IsEqual ("No errors.\n"))
|
|
{
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString (
|
|
"Ray-trace shader program was linked with following warnings:\n") + aLinkLog;
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_PORTABILITY_ARB, 0, GL_DEBUG_SEVERITY_LOW_ARB, aMessage);
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
Handle(OpenGl_ShaderObject) aBasicVertShader = initShader (
|
|
GL_VERTEX_SHADER, ShaderSource (aFolder + "/RaytraceBase.vs"), theGlContext);
|
|
|
|
if (aBasicVertShader.IsNull())
|
|
{
|
|
return safeFailBack ("Failed to initialize FSAA vertex shader", theGlContext);
|
|
}
|
|
|
|
TCollection_AsciiString aFiles[] = { aFolder + "/RaytraceBase.fs",
|
|
aFolder + "/RaytraceSmooth.fs" };
|
|
|
|
myPostFSAAShaderSource.Load (aFiles, 2);
|
|
|
|
myPostFSAAShaderSource.SetPrefix (aPrefixString);
|
|
|
|
myPostFSAAShader = initShader (GL_FRAGMENT_SHADER, myPostFSAAShaderSource, theGlContext);
|
|
|
|
if (myPostFSAAShader.IsNull())
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to initialize FSAA fragment shader", theGlContext);
|
|
}
|
|
|
|
myPostFSAAProgram = new OpenGl_ShaderProgram;
|
|
|
|
if (!myPostFSAAProgram->Create (theGlContext))
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to create FSAA shader program", theGlContext);
|
|
}
|
|
|
|
if (!myPostFSAAProgram->AttachShader (theGlContext, aBasicVertShader)
|
|
|| !myPostFSAAProgram->AttachShader (theGlContext, myPostFSAAShader))
|
|
{
|
|
aBasicVertShader->Release (theGlContext.operator->());
|
|
|
|
return safeFailBack ("Failed to attach FSAA shader objects", theGlContext);
|
|
}
|
|
|
|
myPostFSAAProgram->SetAttributeName (theGlContext, Graphic3d_TOA_POS, "occVertex");
|
|
|
|
TCollection_AsciiString aLinkLog;
|
|
|
|
if (!myPostFSAAProgram->Link (theGlContext))
|
|
{
|
|
myPostFSAAProgram->FetchInfoLog (theGlContext, aLinkLog);
|
|
|
|
return safeFailBack (TCollection_ExtendedString (
|
|
"Failed to link FSAA shader program:\n") + aLinkLog, theGlContext);
|
|
}
|
|
else if (theGlContext->caps->glslWarnings)
|
|
{
|
|
myPostFSAAProgram->FetchInfoLog (theGlContext, aLinkLog);
|
|
|
|
if (!aLinkLog.IsEmpty() && !aLinkLog.IsEqual ("No errors.\n"))
|
|
{
|
|
const TCollection_ExtendedString aMessage = TCollection_ExtendedString (
|
|
"FSAA shader program was linked with following warnings:\n") + aLinkLog;
|
|
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
|
|
GL_DEBUG_TYPE_PORTABILITY_ARB, 0, GL_DEBUG_SEVERITY_LOW_ARB, aMessage);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (myRaytraceInitStatus == OpenGl_RT_NONE || aToRebuildShaders)
|
|
{
|
|
for (Standard_Integer anIndex = 0; anIndex < 2; ++anIndex)
|
|
{
|
|
Handle(OpenGl_ShaderProgram)& aShaderProgram =
|
|
(anIndex == 0) ? myRaytraceProgram : myPostFSAAProgram;
|
|
|
|
theGlContext->BindProgram (aShaderProgram);
|
|
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uSceneMinPointTexture", OpenGl_RT_SceneMinPointTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uSceneMaxPointTexture", OpenGl_RT_SceneMaxPointTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uSceneNodeInfoTexture", OpenGl_RT_SceneNodeInfoTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uGeometryVertexTexture", OpenGl_RT_GeometryVertexTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uGeometryNormalTexture", OpenGl_RT_GeometryNormalTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uGeometryTexCrdTexture", OpenGl_RT_GeometryTexCrdTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uGeometryTriangTexture", OpenGl_RT_GeometryTriangTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uSceneTransformTexture", OpenGl_RT_SceneTransformTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uEnvironmentMapTexture", OpenGl_RT_EnvironmentMapTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uRaytraceMaterialTexture", OpenGl_RT_RaytraceMaterialTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uRaytraceLightSrcTexture", OpenGl_RT_RaytraceLightSrcTexture);
|
|
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uOpenGlColorTexture", OpenGl_RT_OpenGlColorTexture);
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uOpenGlDepthTexture", OpenGl_RT_OpenGlDepthTexture);
|
|
|
|
if (anIndex == 1)
|
|
{
|
|
aShaderProgram->SetSampler (theGlContext,
|
|
"uFSAAInputTexture", OpenGl_RT_FSAAInputTexture);
|
|
}
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_aPosition] =
|
|
aShaderProgram->GetAttributeLocation (theGlContext, "occVertex");
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_uOriginLB] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOriginLB");
|
|
myUniformLocations[anIndex][OpenGl_RT_uOriginRB] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOriginRB");
|
|
myUniformLocations[anIndex][OpenGl_RT_uOriginLT] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOriginLT");
|
|
myUniformLocations[anIndex][OpenGl_RT_uOriginRT] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOriginRT");
|
|
myUniformLocations[anIndex][OpenGl_RT_uDirectLB] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uDirectLB");
|
|
myUniformLocations[anIndex][OpenGl_RT_uDirectRB] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uDirectRB");
|
|
myUniformLocations[anIndex][OpenGl_RT_uDirectLT] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uDirectLT");
|
|
myUniformLocations[anIndex][OpenGl_RT_uDirectRT] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uDirectRT");
|
|
myUniformLocations[anIndex][OpenGl_RT_uUnviewMat] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uUnviewMat");
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_uSceneRad] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uSceneRadius");
|
|
myUniformLocations[anIndex][OpenGl_RT_uSceneEps] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uSceneEpsilon");
|
|
myUniformLocations[anIndex][OpenGl_RT_uLightCount] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uLightCount");
|
|
myUniformLocations[anIndex][OpenGl_RT_uLightAmbnt] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uGlobalAmbient");
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_uOffsetX] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOffsetX");
|
|
myUniformLocations[anIndex][OpenGl_RT_uOffsetY] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uOffsetY");
|
|
myUniformLocations[anIndex][OpenGl_RT_uSamples] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uSamples");
|
|
myUniformLocations[anIndex][OpenGl_RT_uWinSizeX] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uWinSizeX");
|
|
myUniformLocations[anIndex][OpenGl_RT_uWinSizeY] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uWinSizeY");
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_uTextures] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uTextureSamplers");
|
|
|
|
myUniformLocations[anIndex][OpenGl_RT_uShadEnabled] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uShadowsEnable");
|
|
myUniformLocations[anIndex][OpenGl_RT_uReflEnabled] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uReflectionsEnable");
|
|
myUniformLocations[anIndex][OpenGl_RT_uEnvMapEnable] =
|
|
aShaderProgram->GetUniformLocation (theGlContext, "uEnvironmentEnable");
|
|
}
|
|
|
|
theGlContext->BindProgram (NULL);
|
|
}
|
|
|
|
if (myRaytraceInitStatus != OpenGl_RT_NONE)
|
|
{
|
|
return myRaytraceInitStatus == OpenGl_RT_INIT;
|
|
}
|
|
|
|
if (myRaytraceFBO1.IsNull())
|
|
{
|
|
myRaytraceFBO1 = new OpenGl_FrameBuffer;
|
|
}
|
|
|
|
if (myRaytraceFBO2.IsNull())
|
|
{
|
|
myRaytraceFBO2 = new OpenGl_FrameBuffer;
|
|
}
|
|
|
|
const GLfloat aVertices[] = { -1.f, -1.f, 0.f,
|
|
-1.f, 1.f, 0.f,
|
|
1.f, 1.f, 0.f,
|
|
1.f, 1.f, 0.f,
|
|
1.f, -1.f, 0.f,
|
|
-1.f, -1.f, 0.f };
|
|
|
|
myRaytraceScreenQuad.Init (theGlContext, 3, 6, aVertices);
|
|
|
|
myRaytraceInitStatus = OpenGl_RT_INIT; // initialized in normal way
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : NullifyResource
|
|
// purpose :
|
|
// =======================================================================
|
|
inline void NullifyResource (const Handle(OpenGl_Context)& theGlContext,
|
|
Handle(OpenGl_Resource)& theResource)
|
|
{
|
|
if (!theResource.IsNull())
|
|
{
|
|
theResource->Release (theGlContext.operator->());
|
|
theResource.Nullify();
|
|
}
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : ReleaseRaytraceResources
|
|
// purpose : Releases OpenGL/GLSL shader programs
|
|
// =======================================================================
|
|
void OpenGl_View::releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
NullifyResource (theGlContext, myOpenGlFBO);
|
|
NullifyResource (theGlContext, myRaytraceFBO1);
|
|
NullifyResource (theGlContext, myRaytraceFBO2);
|
|
|
|
NullifyResource (theGlContext, myRaytraceShader);
|
|
NullifyResource (theGlContext, myPostFSAAShader);
|
|
|
|
NullifyResource (theGlContext, myRaytraceProgram);
|
|
NullifyResource (theGlContext, myPostFSAAProgram);
|
|
|
|
NullifyResource (theGlContext, mySceneNodeInfoTexture);
|
|
NullifyResource (theGlContext, mySceneMinPointTexture);
|
|
NullifyResource (theGlContext, mySceneMaxPointTexture);
|
|
|
|
NullifyResource (theGlContext, myGeometryVertexTexture);
|
|
NullifyResource (theGlContext, myGeometryNormalTexture);
|
|
NullifyResource (theGlContext, myGeometryTexCrdTexture);
|
|
NullifyResource (theGlContext, myGeometryTriangTexture);
|
|
NullifyResource (theGlContext, mySceneTransformTexture);
|
|
|
|
NullifyResource (theGlContext, myRaytraceLightSrcTexture);
|
|
NullifyResource (theGlContext, myRaytraceMaterialTexture);
|
|
|
|
if (myRaytraceScreenQuad.IsValid())
|
|
myRaytraceScreenQuad.Release (theGlContext.operator->());
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : ResizeRaytraceBuffers
|
|
// purpose : Resizes OpenGL frame buffers
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::resizeRaytraceBuffers (const Standard_Integer theSizeX,
|
|
const Standard_Integer theSizeY,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
if (myRaytraceFBO1->GetVPSizeX() != theSizeX
|
|
|| myRaytraceFBO1->GetVPSizeY() != theSizeY)
|
|
{
|
|
myRaytraceFBO1->Init (theGlContext, theSizeX, theSizeY);
|
|
myRaytraceFBO2->Init (theGlContext, theSizeX, theSizeY);
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : UpdateCamera
|
|
// purpose : Generates viewing rays for corners of screen quad
|
|
// =======================================================================
|
|
void OpenGl_View::updateCamera (const OpenGl_Mat4& theOrientation,
|
|
const OpenGl_Mat4& theViewMapping,
|
|
OpenGl_Vec3* theOrigins,
|
|
OpenGl_Vec3* theDirects,
|
|
OpenGl_Mat4& theUnview)
|
|
{
|
|
// compute inverse model-view-projection matrix
|
|
(theViewMapping * theOrientation).Inverted (theUnview);
|
|
|
|
Standard_Integer aOriginIndex = 0;
|
|
Standard_Integer aDirectIndex = 0;
|
|
|
|
for (Standard_Integer aY = -1; aY <= 1; aY += 2)
|
|
{
|
|
for (Standard_Integer aX = -1; aX <= 1; aX += 2)
|
|
{
|
|
OpenGl_Vec4 aOrigin (GLfloat(aX),
|
|
GLfloat(aY),
|
|
-1.0f,
|
|
1.0f);
|
|
|
|
aOrigin = theUnview * aOrigin;
|
|
|
|
aOrigin.x() = aOrigin.x() / aOrigin.w();
|
|
aOrigin.y() = aOrigin.y() / aOrigin.w();
|
|
aOrigin.z() = aOrigin.z() / aOrigin.w();
|
|
|
|
OpenGl_Vec4 aDirect (GLfloat(aX),
|
|
GLfloat(aY),
|
|
1.0f,
|
|
1.0f);
|
|
|
|
aDirect = theUnview * aDirect;
|
|
|
|
aDirect.x() = aDirect.x() / aDirect.w();
|
|
aDirect.y() = aDirect.y() / aDirect.w();
|
|
aDirect.z() = aDirect.z() / aDirect.w();
|
|
|
|
aDirect = aDirect - aOrigin;
|
|
|
|
GLdouble aInvLen = 1.0 / sqrt (aDirect.x() * aDirect.x() +
|
|
aDirect.y() * aDirect.y() +
|
|
aDirect.z() * aDirect.z());
|
|
|
|
theOrigins[aOriginIndex++] = OpenGl_Vec3 (static_cast<GLfloat> (aOrigin.x()),
|
|
static_cast<GLfloat> (aOrigin.y()),
|
|
static_cast<GLfloat> (aOrigin.z()));
|
|
|
|
theDirects[aDirectIndex++] = OpenGl_Vec3 (static_cast<GLfloat> (aDirect.x() * aInvLen),
|
|
static_cast<GLfloat> (aDirect.y() * aInvLen),
|
|
static_cast<GLfloat> (aDirect.z() * aInvLen));
|
|
}
|
|
}
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : UploadRaytraceData
|
|
// purpose : Uploads ray-trace data to the GPU
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
if (!theGlContext->IsGlGreaterEqual (3, 1))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: OpenGL version is less than 3.1" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Prepare OpenGL textures
|
|
|
|
if (theGlContext->arbTexBindless != NULL)
|
|
{
|
|
// If OpenGL driver supports bindless textures we need
|
|
// to get unique 64- bit handles for using on the GPU
|
|
if (!myRaytraceGeometry.UpdateTextureHandles (theGlContext))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to get OpenGL texture handles" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Create OpenGL BVH buffers
|
|
|
|
if (mySceneNodeInfoTexture.IsNull()) // create scene BVH buffers
|
|
{
|
|
mySceneNodeInfoTexture = new OpenGl_TextureBufferArb;
|
|
mySceneMinPointTexture = new OpenGl_TextureBufferArb;
|
|
mySceneMaxPointTexture = new OpenGl_TextureBufferArb;
|
|
mySceneTransformTexture = new OpenGl_TextureBufferArb;
|
|
|
|
if (!mySceneNodeInfoTexture->Create (theGlContext)
|
|
|| !mySceneMinPointTexture->Create (theGlContext)
|
|
|| !mySceneMaxPointTexture->Create (theGlContext)
|
|
|| !mySceneTransformTexture->Create (theGlContext))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to create scene BVH buffers" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
if (myGeometryVertexTexture.IsNull()) // create geometry buffers
|
|
{
|
|
myGeometryVertexTexture = new OpenGl_TextureBufferArb;
|
|
myGeometryNormalTexture = new OpenGl_TextureBufferArb;
|
|
myGeometryTexCrdTexture = new OpenGl_TextureBufferArb;
|
|
myGeometryTriangTexture = new OpenGl_TextureBufferArb;
|
|
|
|
if (!myGeometryVertexTexture->Create (theGlContext)
|
|
|| !myGeometryNormalTexture->Create (theGlContext)
|
|
|| !myGeometryTexCrdTexture->Create (theGlContext)
|
|
|| !myGeometryTriangTexture->Create (theGlContext))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to create buffers for triangulation data" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
if (myRaytraceMaterialTexture.IsNull()) // create material buffer
|
|
{
|
|
myRaytraceMaterialTexture = new OpenGl_TextureBufferArb;
|
|
|
|
if (!myRaytraceMaterialTexture->Create (theGlContext))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to create buffers for material data" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Write transform buffer
|
|
|
|
BVH_Mat4f* aNodeTransforms = new BVH_Mat4f[myRaytraceGeometry.Size()];
|
|
|
|
bool aResult = true;
|
|
|
|
for (Standard_Integer anElemIndex = 0; anElemIndex < myRaytraceGeometry.Size(); ++anElemIndex)
|
|
{
|
|
OpenGl_TriangleSet* aTriangleSet = dynamic_cast<OpenGl_TriangleSet*> (
|
|
myRaytraceGeometry.Objects().ChangeValue (anElemIndex).operator->());
|
|
|
|
const BVH_Transform<Standard_ShortReal, 4>* aTransform =
|
|
dynamic_cast<const BVH_Transform<Standard_ShortReal, 4>* > (aTriangleSet->Properties().operator->());
|
|
|
|
Standard_ASSERT_RETURN (aTransform != NULL,
|
|
"OpenGl_TriangleSet does not contain transform", Standard_False);
|
|
|
|
aNodeTransforms[anElemIndex] = aTransform->Inversed();
|
|
}
|
|
|
|
aResult &= mySceneTransformTexture->Init (theGlContext, 4,
|
|
myRaytraceGeometry.Size() * 4, reinterpret_cast<const GLfloat*> (aNodeTransforms));
|
|
|
|
delete [] aNodeTransforms;
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Write geometry and bottom-level BVH buffers
|
|
|
|
Standard_Size aTotalVerticesNb = 0;
|
|
Standard_Size aTotalElementsNb = 0;
|
|
Standard_Size aTotalBVHNodesNb = 0;
|
|
|
|
for (Standard_Integer anElemIndex = 0; anElemIndex < myRaytraceGeometry.Size(); ++anElemIndex)
|
|
{
|
|
OpenGl_TriangleSet* aTriangleSet = dynamic_cast<OpenGl_TriangleSet*> (
|
|
myRaytraceGeometry.Objects().ChangeValue (anElemIndex).operator->());
|
|
|
|
Standard_ASSERT_RETURN (aTriangleSet != NULL,
|
|
"Error: Failed to get triangulation of OpenGL element", Standard_False);
|
|
|
|
aTotalVerticesNb += aTriangleSet->Vertices.size();
|
|
aTotalElementsNb += aTriangleSet->Elements.size();
|
|
|
|
Standard_ASSERT_RETURN (!aTriangleSet->BVH().IsNull(),
|
|
"Error: Failed to get bottom-level BVH of OpenGL element", Standard_False);
|
|
|
|
aTotalBVHNodesNb += aTriangleSet->BVH()->NodeInfoBuffer().size();
|
|
}
|
|
|
|
aTotalBVHNodesNb += myRaytraceGeometry.BVH()->NodeInfoBuffer().size();
|
|
|
|
if (aTotalBVHNodesNb != 0)
|
|
{
|
|
aResult &= mySceneNodeInfoTexture->Init (
|
|
theGlContext, 4, GLsizei (aTotalBVHNodesNb), static_cast<const GLuint*> (NULL));
|
|
aResult &= mySceneMinPointTexture->Init (
|
|
theGlContext, 3, GLsizei (aTotalBVHNodesNb), static_cast<const GLfloat*> (NULL));
|
|
aResult &= mySceneMaxPointTexture->Init (
|
|
theGlContext, 3, GLsizei (aTotalBVHNodesNb), static_cast<const GLfloat*> (NULL));
|
|
}
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload buffers for bottom-level scene BVH" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
|
|
if (aTotalElementsNb != 0)
|
|
{
|
|
aResult &= myGeometryTriangTexture->Init (
|
|
theGlContext, 4, GLsizei (aTotalElementsNb), static_cast<const GLuint*> (NULL));
|
|
}
|
|
|
|
if (aTotalVerticesNb != 0)
|
|
{
|
|
aResult &= myGeometryVertexTexture->Init (
|
|
theGlContext, 3, GLsizei (aTotalVerticesNb), static_cast<const GLfloat*> (NULL));
|
|
aResult &= myGeometryNormalTexture->Init (
|
|
theGlContext, 3, GLsizei (aTotalVerticesNb), static_cast<const GLfloat*> (NULL));
|
|
aResult &= myGeometryTexCrdTexture->Init (
|
|
theGlContext, 2, GLsizei (aTotalVerticesNb), static_cast<const GLfloat*> (NULL));
|
|
}
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload buffers for scene geometry" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
|
|
const NCollection_Handle<BVH_Tree<Standard_ShortReal, 3> >& aBVH = myRaytraceGeometry.BVH();
|
|
|
|
if (aBVH->Length() > 0)
|
|
{
|
|
aResult &= mySceneNodeInfoTexture->SubData (theGlContext, 0, aBVH->Length(),
|
|
reinterpret_cast<const GLuint*> (&aBVH->NodeInfoBuffer().front()));
|
|
aResult &= mySceneMinPointTexture->SubData (theGlContext, 0, aBVH->Length(),
|
|
reinterpret_cast<const GLfloat*> (&aBVH->MinPointBuffer().front()));
|
|
aResult &= mySceneMaxPointTexture->SubData (theGlContext, 0, aBVH->Length(),
|
|
reinterpret_cast<const GLfloat*> (&aBVH->MaxPointBuffer().front()));
|
|
}
|
|
|
|
for (Standard_Integer aNodeIdx = 0; aNodeIdx < aBVH->Length(); ++aNodeIdx)
|
|
{
|
|
if (!aBVH->IsOuter (aNodeIdx))
|
|
continue;
|
|
|
|
OpenGl_TriangleSet* aTriangleSet = myRaytraceGeometry.TriangleSet (aNodeIdx);
|
|
|
|
Standard_ASSERT_RETURN (aTriangleSet != NULL,
|
|
"Error: Failed to get triangulation of OpenGL element", Standard_False);
|
|
|
|
Standard_Integer aBVHOffset = myRaytraceGeometry.AccelerationOffset (aNodeIdx);
|
|
|
|
Standard_ASSERT_RETURN (aBVHOffset != OpenGl_RaytraceGeometry::INVALID_OFFSET,
|
|
"Error: Failed to get offset for bottom-level BVH", Standard_False);
|
|
|
|
const Standard_Integer aBvhBuffersSize = aTriangleSet->BVH()->Length();
|
|
|
|
if (aBvhBuffersSize != 0)
|
|
{
|
|
aResult &= mySceneNodeInfoTexture->SubData (theGlContext, aBVHOffset, aBvhBuffersSize,
|
|
reinterpret_cast<const GLuint*> (&aTriangleSet->BVH()->NodeInfoBuffer().front()));
|
|
aResult &= mySceneMinPointTexture->SubData (theGlContext, aBVHOffset, aBvhBuffersSize,
|
|
reinterpret_cast<const GLfloat*> (&aTriangleSet->BVH()->MinPointBuffer().front()));
|
|
aResult &= mySceneMaxPointTexture->SubData (theGlContext, aBVHOffset, aBvhBuffersSize,
|
|
reinterpret_cast<const GLfloat*> (&aTriangleSet->BVH()->MaxPointBuffer().front()));
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload buffers for bottom-level scene BVHs" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
const Standard_Integer aVerticesOffset = myRaytraceGeometry.VerticesOffset (aNodeIdx);
|
|
|
|
Standard_ASSERT_RETURN (aVerticesOffset != OpenGl_RaytraceGeometry::INVALID_OFFSET,
|
|
"Error: Failed to get offset for triangulation vertices of OpenGL element", Standard_False);
|
|
|
|
if (!aTriangleSet->Vertices.empty())
|
|
{
|
|
aResult &= myGeometryNormalTexture->SubData (theGlContext, aVerticesOffset,
|
|
GLsizei (aTriangleSet->Normals.size()), reinterpret_cast<const GLfloat*> (&aTriangleSet->Normals.front()));
|
|
aResult &= myGeometryTexCrdTexture->SubData (theGlContext, aVerticesOffset,
|
|
GLsizei (aTriangleSet->TexCrds.size()), reinterpret_cast<const GLfloat*> (&aTriangleSet->TexCrds.front()));
|
|
aResult &= myGeometryVertexTexture->SubData (theGlContext, aVerticesOffset,
|
|
GLsizei (aTriangleSet->Vertices.size()), reinterpret_cast<const GLfloat*> (&aTriangleSet->Vertices.front()));
|
|
}
|
|
|
|
const Standard_Integer anElementsOffset = myRaytraceGeometry.ElementsOffset (aNodeIdx);
|
|
|
|
Standard_ASSERT_RETURN (anElementsOffset != OpenGl_RaytraceGeometry::INVALID_OFFSET,
|
|
"Error: Failed to get offset for triangulation elements of OpenGL element", Standard_False);
|
|
|
|
if (!aTriangleSet->Elements.empty())
|
|
{
|
|
aResult &= myGeometryTriangTexture->SubData (theGlContext, anElementsOffset, GLsizei (aTriangleSet->Elements.size()),
|
|
reinterpret_cast<const GLuint*> (&aTriangleSet->Elements.front()));
|
|
}
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload triangulation buffers for OpenGL element" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Write material buffer
|
|
|
|
if (myRaytraceGeometry.Materials.size() != 0)
|
|
{
|
|
aResult &= myRaytraceMaterialTexture->Init (theGlContext, 4,
|
|
GLsizei (myRaytraceGeometry.Materials.size() * 11), myRaytraceGeometry.Materials.front().Packed());
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload material buffer" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
myIsRaytraceDataValid = myRaytraceGeometry.Objects().Size() != 0;
|
|
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
|
|
Standard_ShortReal aMemUsed = 0.f;
|
|
|
|
for (Standard_Integer anElemIdx = 0; anElemIdx < myRaytraceGeometry.Size(); ++anElemIdx)
|
|
{
|
|
OpenGl_TriangleSet* aTriangleSet = dynamic_cast<OpenGl_TriangleSet*> (
|
|
myRaytraceGeometry.Objects().ChangeValue (anElemIdx).operator->());
|
|
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->Vertices.size() * sizeof (BVH_Vec3f));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->Normals.size() * sizeof (BVH_Vec3f));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->TexCrds.size() * sizeof (BVH_Vec2f));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->Elements.size() * sizeof (BVH_Vec4i));
|
|
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->BVH()->NodeInfoBuffer().size() * sizeof (BVH_Vec4i));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->BVH()->MinPointBuffer().size() * sizeof (BVH_Vec3f));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
aTriangleSet->BVH()->MaxPointBuffer().size() * sizeof (BVH_Vec3f));
|
|
}
|
|
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
myRaytraceGeometry.BVH()->NodeInfoBuffer().size() * sizeof (BVH_Vec4i));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
myRaytraceGeometry.BVH()->MinPointBuffer().size() * sizeof (BVH_Vec3f));
|
|
aMemUsed += static_cast<Standard_ShortReal> (
|
|
myRaytraceGeometry.BVH()->MaxPointBuffer().size() * sizeof (BVH_Vec3f));
|
|
|
|
std::cout << "GPU Memory Used (MB): ~" << aMemUsed / 1048576 << std::endl;
|
|
|
|
#endif
|
|
|
|
return aResult;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : UpdateRaytraceLightSources
|
|
// purpose : Updates 3D scene light sources for ray-tracing
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
myRaytraceGeometry.Sources.clear();
|
|
|
|
myRaytraceGeometry.Ambient = BVH_Vec4f (0.0f, 0.0f, 0.0f, 0.0f);
|
|
|
|
for (OpenGl_ListOfLight::Iterator anItl (LightList()); anItl.More(); anItl.Next())
|
|
{
|
|
const OpenGl_Light& aLight = anItl.Value();
|
|
|
|
if (aLight.Type == Visual3d_TOLS_AMBIENT)
|
|
{
|
|
myRaytraceGeometry.Ambient += BVH_Vec4f (aLight.Color.r(),
|
|
aLight.Color.g(),
|
|
aLight.Color.b(),
|
|
0.0f);
|
|
continue;
|
|
}
|
|
|
|
BVH_Vec4f aDiffuse (aLight.Color.r(),
|
|
aLight.Color.g(),
|
|
aLight.Color.b(),
|
|
1.0f);
|
|
|
|
BVH_Vec4f aPosition (-aLight.Direction.x(),
|
|
-aLight.Direction.y(),
|
|
-aLight.Direction.z(),
|
|
0.0f);
|
|
|
|
if (aLight.Type != Visual3d_TOLS_DIRECTIONAL)
|
|
{
|
|
aPosition = BVH_Vec4f (aLight.Position.x(),
|
|
aLight.Position.y(),
|
|
aLight.Position.z(),
|
|
1.0f);
|
|
}
|
|
|
|
if (aLight.IsHeadlight)
|
|
{
|
|
aPosition = theInvModelView * aPosition;
|
|
}
|
|
|
|
myRaytraceGeometry.Sources.push_back (OpenGl_RaytraceLight (aDiffuse, aPosition));
|
|
}
|
|
|
|
if (myRaytraceLightSrcTexture.IsNull()) // create light source buffer
|
|
{
|
|
myRaytraceLightSrcTexture = new OpenGl_TextureBufferArb;
|
|
|
|
if (!myRaytraceLightSrcTexture->Create (theGlContext))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to create light source buffer" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
if (myRaytraceGeometry.Sources.size() != 0)
|
|
{
|
|
const GLfloat* aDataPtr = myRaytraceGeometry.Sources.front().Packed();
|
|
if (!myRaytraceLightSrcTexture->Init (theGlContext, 4, GLsizei (myRaytraceGeometry.Sources.size() * 2), aDataPtr))
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Error: Failed to upload light source buffer" << std::endl;
|
|
#endif
|
|
return Standard_False;
|
|
}
|
|
}
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : UpdateRaytraceEnvironmentMap
|
|
// purpose : Updates environment map for ray-tracing
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::updateRaytraceEnvironmentMap (const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
Standard_Boolean aResult = Standard_True;
|
|
|
|
if (!myToUpdateEnvironmentMap)
|
|
{
|
|
return aResult;
|
|
}
|
|
|
|
for (Standard_Integer anIdx = 0; anIdx < 2; ++anIdx)
|
|
{
|
|
const Handle(OpenGl_ShaderProgram)& aProgram =
|
|
anIdx == 0 ? myRaytraceProgram : myPostFSAAProgram;
|
|
|
|
if (!aProgram.IsNull())
|
|
{
|
|
aResult &= theGlContext->BindProgram (aProgram);
|
|
|
|
if (!myTextureEnv.IsNull() && mySurfaceDetail != Visual3d_TOD_NONE)
|
|
{
|
|
myTextureEnv->Bind (theGlContext,
|
|
GL_TEXTURE0 + OpenGl_RT_EnvironmentMapTexture);
|
|
|
|
aResult &= aProgram->SetUniform (theGlContext,
|
|
myUniformLocations[anIdx][OpenGl_RT_uEnvMapEnable], 1);
|
|
}
|
|
else
|
|
{
|
|
aResult &= aProgram->SetUniform (theGlContext,
|
|
myUniformLocations[anIdx][OpenGl_RT_uEnvMapEnable], 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
myToUpdateEnvironmentMap = Standard_False;
|
|
|
|
theGlContext->BindProgram (NULL);
|
|
|
|
return aResult;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : SetUniformState
|
|
// purpose : Sets uniform state for the given ray-tracing shader program
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::setUniformState (const Graphic3d_CView& theCView,
|
|
const OpenGl_Vec3* theOrigins,
|
|
const OpenGl_Vec3* theDirects,
|
|
const OpenGl_Mat4& theUnviewMat,
|
|
const Standard_Integer theProgramId,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
Handle(OpenGl_ShaderProgram)& theProgram =
|
|
theProgramId == 0 ? myRaytraceProgram : myPostFSAAProgram;
|
|
|
|
if (theProgram.IsNull())
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
Standard_Boolean aResult = Standard_True;
|
|
|
|
const Standard_Integer aLightSourceBufferSize =
|
|
static_cast<Standard_Integer> (myRaytraceGeometry.Sources.size());
|
|
|
|
// Set camera state
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uOriginLB], theOrigins[0]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uOriginRB], theOrigins[1]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uOriginLT], theOrigins[2]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uOriginRT], theOrigins[3]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uDirectLB], theDirects[0]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uDirectRB], theDirects[1]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uDirectLT], theDirects[2]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uDirectRT], theDirects[3]);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uUnviewMat], theUnviewMat);
|
|
|
|
// Set scene parameters
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uSceneRad], myRaytraceSceneRadius);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uSceneEps], myRaytraceSceneEpsilon);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uLightCount], aLightSourceBufferSize);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uLightAmbnt], myRaytraceGeometry.Ambient);
|
|
|
|
// Set run-time rendering options
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uShadEnabled], theCView.RenderParams.IsShadowEnabled ? 1 : 0);
|
|
aResult &= theProgram->SetUniform (theGlContext,
|
|
myUniformLocations[theProgramId][OpenGl_RT_uReflEnabled], theCView.RenderParams.IsReflectionEnabled ? 1 : 0);
|
|
|
|
// Set array of 64-bit texture handles
|
|
if (theGlContext->arbTexBindless != NULL && myRaytraceGeometry.HasTextures())
|
|
{
|
|
aResult &= theProgram->SetUniform (theGlContext, "uTextureSamplers", static_cast<GLsizei> (
|
|
myRaytraceGeometry.TextureHandles().size()), &myRaytraceGeometry.TextureHandles()[0]);
|
|
}
|
|
|
|
if (!aResult)
|
|
{
|
|
#ifdef RAY_TRACE_PRINT_INFO
|
|
std::cout << "Info: Not all uniforms were detected for program " << theProgramId << std::endl;
|
|
#endif
|
|
}
|
|
|
|
return aResult;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : BindRaytraceTextures
|
|
// purpose : Binds ray-trace textures to corresponding texture units
|
|
// =======================================================================
|
|
void OpenGl_View::bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
mySceneMinPointTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneMinPointTexture);
|
|
mySceneMaxPointTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneMaxPointTexture);
|
|
mySceneNodeInfoTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneNodeInfoTexture);
|
|
myGeometryVertexTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryVertexTexture);
|
|
myGeometryNormalTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryNormalTexture);
|
|
myGeometryTexCrdTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryTexCrdTexture);
|
|
myGeometryTriangTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryTriangTexture);
|
|
mySceneTransformTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneTransformTexture);
|
|
myRaytraceMaterialTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_RaytraceMaterialTexture);
|
|
myRaytraceLightSrcTexture->BindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_RaytraceLightSrcTexture);
|
|
|
|
if (!myOpenGlFBO.IsNull())
|
|
{
|
|
myOpenGlFBO->ColorTexture()->Bind (theGlContext, GL_TEXTURE0 + OpenGl_RT_OpenGlColorTexture);
|
|
myOpenGlFBO->DepthStencilTexture()->Bind (theGlContext, GL_TEXTURE0 + OpenGl_RT_OpenGlDepthTexture);
|
|
}
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : UnbindRaytraceTextures
|
|
// purpose : Unbinds ray-trace textures from corresponding texture units
|
|
// =======================================================================
|
|
void OpenGl_View::unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
mySceneMinPointTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneMinPointTexture);
|
|
mySceneMaxPointTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneMaxPointTexture);
|
|
mySceneNodeInfoTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneNodeInfoTexture);
|
|
myGeometryVertexTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryVertexTexture);
|
|
myGeometryNormalTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryNormalTexture);
|
|
myGeometryTexCrdTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryTexCrdTexture);
|
|
myGeometryTriangTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_GeometryTriangTexture);
|
|
mySceneTransformTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_SceneTransformTexture);
|
|
myRaytraceMaterialTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_RaytraceMaterialTexture);
|
|
myRaytraceLightSrcTexture->UnbindTexture (theGlContext, GL_TEXTURE0 + OpenGl_RT_RaytraceLightSrcTexture);
|
|
|
|
if (!myOpenGlFBO.IsNull())
|
|
{
|
|
myOpenGlFBO->ColorTexture()->Unbind (theGlContext, GL_TEXTURE0 + OpenGl_RT_OpenGlColorTexture);
|
|
myOpenGlFBO->DepthStencilTexture()->Unbind (theGlContext, GL_TEXTURE0 + OpenGl_RT_OpenGlDepthTexture);
|
|
}
|
|
|
|
theGlContext->core15fwd->glActiveTexture (GL_TEXTURE0);
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : RunRaytraceShaders
|
|
// purpose : Runs ray-tracing shader programs
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::runRaytraceShaders (const Graphic3d_CView& theCView,
|
|
const Standard_Integer theSizeX,
|
|
const Standard_Integer theSizeY,
|
|
const OpenGl_Vec3* theOrigins,
|
|
const OpenGl_Vec3* theDirects,
|
|
const OpenGl_Mat4& theUnviewMat,
|
|
OpenGl_FrameBuffer* theOutputFBO,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
bindRaytraceTextures (theGlContext);
|
|
|
|
if (theCView.RenderParams.IsAntialiasingEnabled) // render source image to FBO
|
|
{
|
|
myRaytraceFBO1->BindBuffer (theGlContext);
|
|
|
|
glDisable (GL_BLEND);
|
|
}
|
|
|
|
Standard_Boolean aResult = theGlContext->BindProgram (myRaytraceProgram);
|
|
|
|
aResult &= setUniformState (theCView,
|
|
theOrigins,
|
|
theDirects,
|
|
theUnviewMat,
|
|
0, // ID of RT program
|
|
theGlContext);
|
|
|
|
myRaytraceScreenQuad.BindVertexAttrib (theGlContext, Graphic3d_TOA_POS);
|
|
{
|
|
if (aResult)
|
|
theGlContext->core20fwd->glDrawArrays (GL_TRIANGLES, 0, 6);
|
|
}
|
|
myRaytraceScreenQuad.UnbindVertexAttrib (theGlContext, Graphic3d_TOA_POS);
|
|
|
|
if (!theCView.RenderParams.IsAntialiasingEnabled || !aResult)
|
|
{
|
|
unbindRaytraceTextures (theGlContext);
|
|
|
|
theGlContext->BindProgram (NULL);
|
|
|
|
return aResult;
|
|
}
|
|
|
|
myRaytraceFBO1->ColorTexture()->Bind (theGlContext, GL_TEXTURE0 + OpenGl_RT_FSAAInputTexture);
|
|
|
|
aResult &= theGlContext->BindProgram (myPostFSAAProgram);
|
|
|
|
aResult &= setUniformState (theCView,
|
|
theOrigins,
|
|
theDirects,
|
|
theUnviewMat,
|
|
1, // ID of FSAA program
|
|
theGlContext);
|
|
|
|
myRaytraceScreenQuad.BindVertexAttrib (theGlContext, Graphic3d_TOA_POS);
|
|
{
|
|
// Perform multi-pass adaptive FSAA using ping-pong technique.
|
|
// We use 'FLIPTRI' sampling pattern changing for every pixel
|
|
// (3 additional samples per pixel, the 1st sample is already
|
|
// available from initial ray-traced image).
|
|
for (Standard_Integer anIt = 1; anIt < 4; ++anIt)
|
|
{
|
|
GLfloat aOffsetX = 1.f / theSizeX;
|
|
GLfloat aOffsetY = 1.f / theSizeY;
|
|
|
|
if (anIt == 1)
|
|
{
|
|
aOffsetX *= -0.55f;
|
|
aOffsetY *= 0.55f;
|
|
}
|
|
else if (anIt == 2)
|
|
{
|
|
aOffsetX *= 0.00f;
|
|
aOffsetY *= -0.55f;
|
|
}
|
|
else if (anIt == 3)
|
|
{
|
|
aOffsetX *= 0.55f;
|
|
aOffsetY *= 0.00f;
|
|
}
|
|
|
|
aResult &= myPostFSAAProgram->SetUniform (theGlContext,
|
|
myUniformLocations[1][OpenGl_RT_uSamples], anIt + 1);
|
|
aResult &= myPostFSAAProgram->SetUniform (theGlContext,
|
|
myUniformLocations[1][OpenGl_RT_uOffsetX], aOffsetX);
|
|
aResult &= myPostFSAAProgram->SetUniform (theGlContext,
|
|
myUniformLocations[1][OpenGl_RT_uOffsetY], aOffsetY);
|
|
|
|
Handle(OpenGl_FrameBuffer)& aFramebuffer = anIt % 2 ? myRaytraceFBO2 : myRaytraceFBO1;
|
|
|
|
if (anIt == 3) // disable FBO on last iteration
|
|
{
|
|
glEnable (GL_BLEND);
|
|
|
|
if (theOutputFBO != NULL)
|
|
theOutputFBO->BindBuffer (theGlContext);
|
|
}
|
|
else
|
|
{
|
|
aFramebuffer->BindBuffer (theGlContext);
|
|
}
|
|
|
|
theGlContext->core20fwd->glDrawArrays (GL_TRIANGLES, 0, 6);
|
|
|
|
if (anIt != 3) // set input for the next pass
|
|
{
|
|
aFramebuffer->ColorTexture()->Bind (theGlContext, GL_TEXTURE0 + OpenGl_RT_FSAAInputTexture);
|
|
}
|
|
}
|
|
}
|
|
myRaytraceScreenQuad.UnbindVertexAttrib (theGlContext, Graphic3d_TOA_POS);
|
|
|
|
unbindRaytraceTextures (theGlContext);
|
|
|
|
theGlContext->BindProgram (NULL);
|
|
|
|
return aResult;
|
|
}
|
|
|
|
// =======================================================================
|
|
// function : Raytrace
|
|
// purpose : Redraws the window using OpenGL/GLSL ray-tracing
|
|
// =======================================================================
|
|
Standard_Boolean OpenGl_View::raytrace (const Graphic3d_CView& theCView,
|
|
const Standard_Integer theSizeX,
|
|
const Standard_Integer theSizeY,
|
|
OpenGl_FrameBuffer* theOutputFBO,
|
|
const Handle(OpenGl_Context)& theGlContext)
|
|
{
|
|
if (!initRaytraceResources (theCView, theGlContext))
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
if (!resizeRaytraceBuffers (theSizeX, theSizeY, theGlContext))
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
if (!updateRaytraceEnvironmentMap (theGlContext))
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
// Get model-view and projection matrices
|
|
OpenGl_Mat4 aOrientationMatrix;
|
|
OpenGl_Mat4 aViewMappingMatrix;
|
|
OpenGl_Mat4 aInverOrientMatrix;
|
|
|
|
GetMatrices (aOrientationMatrix,
|
|
aViewMappingMatrix);
|
|
|
|
aOrientationMatrix.Inverted (aInverOrientMatrix);
|
|
|
|
if (!updateRaytraceLightSources (aInverOrientMatrix, theGlContext))
|
|
{
|
|
return Standard_False;
|
|
}
|
|
|
|
OpenGl_Vec3 aOrigins[4];
|
|
OpenGl_Vec3 aDirects[4];
|
|
OpenGl_Mat4 anUnviewMat;
|
|
|
|
updateCamera (aOrientationMatrix,
|
|
aViewMappingMatrix,
|
|
aOrigins,
|
|
aDirects,
|
|
anUnviewMat);
|
|
|
|
glEnable (GL_BLEND);
|
|
glDisable (GL_DEPTH_TEST);
|
|
glBlendFunc (GL_ONE, GL_SRC_ALPHA);
|
|
|
|
if (theOutputFBO != NULL)
|
|
{
|
|
theOutputFBO->BindBuffer (theGlContext);
|
|
}
|
|
|
|
// Generate ray-traced image
|
|
if (myIsRaytraceDataValid)
|
|
{
|
|
myRaytraceScreenQuad.Bind (theGlContext);
|
|
|
|
if (!myRaytraceGeometry.AcquireTextures (theGlContext))
|
|
{
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB, GL_DEBUG_TYPE_ERROR_ARB,
|
|
0, GL_DEBUG_SEVERITY_MEDIUM_ARB, "Error: Failed to acquire OpenGL image textures");
|
|
}
|
|
|
|
Standard_Boolean aResult = runRaytraceShaders (theCView,
|
|
theSizeX,
|
|
theSizeY,
|
|
aOrigins,
|
|
aDirects,
|
|
anUnviewMat,
|
|
theOutputFBO,
|
|
theGlContext);
|
|
|
|
if (!aResult)
|
|
{
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB, GL_DEBUG_TYPE_ERROR_ARB,
|
|
0, GL_DEBUG_SEVERITY_MEDIUM_ARB, "Error: Failed to execute ray-tracing shaders");
|
|
}
|
|
|
|
if (!myRaytraceGeometry.ReleaseTextures (theGlContext))
|
|
{
|
|
theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB, GL_DEBUG_TYPE_ERROR_ARB,
|
|
0, GL_DEBUG_SEVERITY_MEDIUM_ARB, "Error: Failed to release OpenGL image textures");
|
|
}
|
|
|
|
myRaytraceScreenQuad.Unbind (theGlContext);
|
|
}
|
|
|
|
glDisable (GL_BLEND);
|
|
glEnable (GL_DEPTH_TEST);
|
|
|
|
return Standard_True;
|
|
} |