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e276548b09
The purpose of this functionality is to bring a basic ray-tracing solution to existing OCCT visualization toolkit (TKOpenGL). Currently ray-tracing visualization core supports sharp shadows, specular reflections, transparency and adaptive anti-aliasing. However, the basis for all ray-tracing algorithms is versatile, allowing you to add new ray-tracing features easily (such as ambient occlusion). All ray-tracing computations are performed on the GPU using OpenCL framework, allowing real-time rendering performance. It is important to note, that real-time ray-tracing is possible using high-performance GPUs with support of OpenCL 1.1 and higher (such as NVIDIA GeForce 660 or ATI/AMD Radeon 7850). When using low-end GPUs (such as NVIDIA GeForce 640) the ray-tracing performance may slow down significantly. Therefore, even with NVIDIA GeForce 640 you can render scenes with the millions of triangles. The support of OpenCL-enabled CPUs and integrated graphics cards is not guaranteed.
428 lines
16 KiB
C++
428 lines
16 KiB
C++
// Created on: 2011-09-20
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// Created by: Sergey ZERCHANINOV
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// Copyright (c) 2011-2013 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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#ifndef _OpenGl_Workspace_Header
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#define _OpenGl_Workspace_Header
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#ifdef HAVE_OPENCL
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#include <map>
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#include <set>
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#include <OpenGl_Cl.hxx>
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#endif
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#include <Handle_OpenGl_Workspace.hxx>
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#include <OpenGl_Window.hxx>
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#include <TColStd_Array2OfReal.hxx>
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#include <Quantity_Color.hxx>
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#include <Graphic3d_CView.hxx>
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#include <Graphic3d_TypeOfComposition.hxx>
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#include <Graphic3d_TypeOfTexture.hxx>
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#include <Graphic3d_PtrFrameBuffer.hxx>
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#include <Graphic3d_BufferType.hxx>
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#include <Handle_Graphic3d_TextureParams.hxx>
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#include <Aspect_CLayer2d.hxx>
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#include <Aspect_Handle.hxx>
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#include <Aspect_PrintAlgo.hxx>
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#include <InterfaceGraphic_Graphic3d.hxx>
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#include <InterfaceGraphic_Visual3d.hxx>
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#include <NCollection_Sequence.hxx>
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#include <OpenGl_tsm.hxx>
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#include <OpenGl_AspectFace.hxx>
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#include <OpenGl_Display.hxx>
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#include <OpenGl_Matrix.hxx>
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#include <OpenGl_NamedStatus.hxx>
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#include <OpenGl_PrinterContext.hxx>
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#ifdef HAVE_OPENCL
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#include <OpenGl_SceneGeometry.hxx>
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#endif
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#include <OpenGl_TextParam.hxx>
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#include <OpenGl_RenderFilter.hxx>
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#include <Handle_OpenGl_View.hxx>
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#include <Handle_OpenGl_Texture.hxx>
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class OpenGl_AspectLine;
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class OpenGl_AspectMarker;
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class OpenGl_AspectText;
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class OpenGl_FrameBuffer;
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class OpenGl_Structure;
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class OpenGl_Element;
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class Image_PixMap;
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//! Represents window with GL context.
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//! Provides methods to render primitives and maintain GL state.
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class OpenGl_Workspace : public OpenGl_Window
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{
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public:
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//! Main constructor - prepare GL context for specified window.
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OpenGl_Workspace (const Handle(OpenGl_Display)& theDisplay,
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const CALL_DEF_WINDOW& theCWindow,
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Aspect_RenderingContext theGContext,
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const Handle(OpenGl_Caps)& theCaps,
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const Handle(OpenGl_Context)& theShareCtx);
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//! Destructor
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virtual ~OpenGl_Workspace();
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void SetActiveView (const Handle(OpenGl_View)& theView) { myView = theView; }
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const Handle(OpenGl_View)& ActiveView () const { return myView; }
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//! Redraw the window.
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void Redraw (const Graphic3d_CView& theCView,
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const Aspect_CLayer2d& theCUnderLayer,
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const Aspect_CLayer2d& theCOverLayer);
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//! Deprecated. Simply calls Redraw().
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void Update (const Graphic3d_CView& theCView,
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const Aspect_CLayer2d& theCUnderLayer,
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const Aspect_CLayer2d& theCOverLayer)
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{
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Redraw (theCView, theCUnderLayer, theCOverLayer);
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}
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//! Special method to perform printing.
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//! System-specific and currently only Win platform implemented.
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Standard_Boolean Print (const Handle(OpenGl_PrinterContext)& thePrintContext,
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const Graphic3d_CView& theCView,
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const Aspect_CLayer2d& theCUnderLayer,
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const Aspect_CLayer2d& theCOverLayer,
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const Aspect_Handle theHPrintDC,
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const Standard_Boolean theToShowBackground,
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const Standard_CString theFileName,
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const Aspect_PrintAlgo thePrintAlgorithm,
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const Standard_Real theScaleFactor);
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const Handle(OpenGl_PrinterContext)& PrinterContext() const
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{
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return myPrintContext;
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}
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void DisplayCallback (const Graphic3d_CView& theCView, int theReason);
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Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer);
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Standard_Boolean BeginAddMode();
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void EndAddMode();
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void ClearImmediatMode (const Graphic3d_CView& theCView,
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const Standard_Boolean theToFlush);
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void RedrawImmediatMode();
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Standard_Boolean BeginImmediatMode (const Graphic3d_CView& theCView,
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const Standard_Boolean theUseDepthTest,
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const Standard_Boolean theRetainMode);
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void EndImmediatMode();
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void DrawStructure (const OpenGl_Structure* theStructure);
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Graphic3d_PtrFrameBuffer FBOCreate (const Standard_Integer theWidth, const Standard_Integer theHeight);
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void FBORelease (Graphic3d_PtrFrameBuffer theFBOPtr);
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Standard_Boolean BufferDump (OpenGl_FrameBuffer* theFBOPtr,
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Image_PixMap& theImage,
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const Graphic3d_BufferType& theBufferType);
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void UseTransparency (const Standard_Boolean theFlag);
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Standard_Boolean& UseZBuffer() { return myUseZBuffer; }
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Standard_Boolean& UseDepthTest() { return myUseDepthTest; }
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Standard_Boolean& UseGLLight() { return myUseGLLight; }
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//// RELATED TO STATUS ////
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Standard_Integer NamedStatus;
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const TEL_COLOUR* HighlightColor;
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const OpenGl_Matrix* SetViewMatrix (const OpenGl_Matrix* );
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const OpenGl_Matrix* SetStructureMatrix (const OpenGl_Matrix*, bool aRevert = false);
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const OpenGl_AspectLine* SetAspectLine (const OpenGl_AspectLine* theAspect);
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const OpenGl_AspectFace* SetAspectFace (const OpenGl_AspectFace* theAspect);
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const OpenGl_AspectMarker* SetAspectMarker (const OpenGl_AspectMarker* theAspect);
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const OpenGl_AspectText* SetAspectText (const OpenGl_AspectText* theAspect);
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void SetTextParam (const OpenGl_TextParam* theParam) { TextParam_set = theParam; }
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//// THESE METHODS ARE EXPORTED AS THEY PROVIDE STATE INFO TO USERDRAW
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Standard_EXPORT const OpenGl_AspectLine* AspectLine (const Standard_Boolean theWithApply);
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Standard_EXPORT const OpenGl_AspectFace* AspectFace (const Standard_Boolean theWithApply);
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Standard_EXPORT const OpenGl_AspectMarker* AspectMarker (const Standard_Boolean theWithApply);
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Standard_EXPORT const OpenGl_AspectText* AspectText (const Standard_Boolean theWithApply);
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inline const OpenGl_TextParam* AspectTextParams() const
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{
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return TextParam_applied;
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}
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//! Clear the applied aspect state.
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void ResetAppliedAspect();
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Standard_EXPORT Handle(OpenGl_Texture) DisableTexture();
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Standard_EXPORT Handle(OpenGl_Texture) EnableTexture (const Handle(OpenGl_Texture)& theTexture,
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const Handle(Graphic3d_TextureParams)& theParams = NULL);
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//! Set filter for restricting rendering of particular elements.
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//! Filter can be applied for rendering passes used by recursive
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//! rendering algorithms for rendering elements of groups.
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//! @param theFilter [in] the filter instance.
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inline void SetRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
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{
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myRenderFilter = theFilter;
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}
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//! Get rendering filter.
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//! @return filter instance.
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inline const Handle(OpenGl_RenderFilter)& GetRenderFilter() const
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{
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return myRenderFilter;
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}
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//! @return applied view matrix.
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inline const OpenGl_Matrix* ViewMatrix() const { return ViewMatrix_applied; }
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//! @return applied model structure matrix.
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inline const OpenGl_Matrix* ModelMatrix() const { return StructureMatrix_applied; }
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protected:
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void CopyBuffers (const Standard_Boolean theFrontToBack);
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virtual Standard_Boolean Activate();
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// TEMPORARY!!!
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void Redraw1 (const Graphic3d_CView& theCView,
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const Aspect_CLayer2d& theCUnderLayer,
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const Aspect_CLayer2d& theCOverLayer,
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const int theToSwap);
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void UpdateMaterial (const int flag);
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void setTextureParams (Handle(OpenGl_Texture)& theTexture,
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const Handle(Graphic3d_TextureParams)& theParams);
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#ifdef HAVE_OPENCL
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public:
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//! Returns information about OpenCL device used for computations.
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Standard_Boolean GetOpenClDeviceInfo (
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NCollection_DataMap<TCollection_AsciiString, TCollection_AsciiString>& theInfo) const;
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protected:
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//! Describes result of OpenCL initializing.
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enum OpenClInitStatus
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{
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OpenGl_CLIS_NONE,
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OpenGl_CLIS_INIT,
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OpenGl_CLIS_FAIL
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};
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protected: //! @name methods related to ray-tracing
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//! Updates 3D scene geometry for ray-tracing.
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Standard_Boolean UpdateRaytraceGeometry (Standard_Boolean theCheck);
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//! Checks to see if the structure is modified.
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Standard_Boolean CheckRaytraceStructure (const OpenGl_Structure* theStructure);
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//! Updates 3D scene light sources for ray-tracing.
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Standard_Boolean UpdateRaytraceLightSources (const GLdouble theInvModelView[16]);
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//! Updates environment map for ray-tracing.
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Standard_Boolean UpdateRaytraceEnvironmentMap();
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//! Adds OpenGL structure to ray-traced scene geometry.
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Standard_Boolean AddRaytraceStructure (const OpenGl_Structure* theStruct,
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const float* theTrans, std::set<const OpenGl_Structure*>& theElements);
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//! Adds OpenGL primitive array to ray-traced scene geometry.
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Standard_Boolean AddRaytracePrimitiveArray (
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const CALL_DEF_PARRAY* theArray, int theMatID, const float* theTrans);
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//! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceVertexIndices (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL triangle array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceTriangleArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL triangle fan array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceTriangleFanArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL triangle fan array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceTriangleStripArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL quadrangle array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceQuadrangleArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
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Standard_Boolean AddRaytraceQuadrangleStripArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Adds OpenGL polygon array to ray-traced scene geometry.
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Standard_Boolean AddRaytracePolygonArray (const CALL_DEF_PARRAY* theArray,
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int theFirstVert, int theVertOffset, int theVertNum, int theMatID);
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//! Initializes OpenCL resources.
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Standard_Boolean InitOpenCL();
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//! Releases OpenCL resources.
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void ReleaseOpenCL();
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//! Resizes OpenCL output image.
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Standard_Boolean ResizeRaytraceOutputBuffer (const cl_int theSizeX, const cl_int theSizeY);
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//! Writes scene geometry to OpenCl device.
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Standard_Boolean WriteRaytraceSceneToDevice();
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//! Runs OpenCL ray-tracing kernels.
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Standard_Boolean RunRaytraceOpenCLKernels (const Graphic3d_CView& theCView,
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const GLfloat theOrigins[16],
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const GLfloat theDirects[16],
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const int theSizeX,
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const int theSizeY);
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//! Redraws the window using OpenCL ray tracing.
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Standard_Boolean Raytrace (const Graphic3d_CView& theCView,
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const int theSizeX, int theSizeY, const Tint theToSwap);
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protected: //! @name fields related to ray-tracing
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//! Result of OpenCL initialization.
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OpenClInitStatus myComputeInitStatus;
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//! Is ATI/AMD OpenCL platform used?
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Standard_Boolean myIsAmdComputePlatform;
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//! Is geometry data valid?
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Standard_Boolean myIsRaytraceDataValid;
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//! Is geometry data musty be updated?
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Standard_Boolean myToUpdateRaytraceData;
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//! 3D scene geometry data for ray-tracing.
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OpenGl_RaytraceScene myRaytraceSceneData;
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//! Radius of bounding sphere of the scene.
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float myRaytraceSceneRadius;
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//! Scene epsilon to prevent self-intersections.
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float myRaytraceSceneEpsilon;
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//! Binned SAH-based BVH builder.
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OpenGl_BinnedBVHBuilder myBVHBuilder;
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//! OpenCL context.
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cl_context myComputeContext;
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//! OpenCL command queue.
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cl_command_queue myRaytraceQueue;
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//! OpenCL computing program.
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cl_program myRaytraceProgram;
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//! OpenCL ray-tracing render kernel.
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cl_kernel myRaytraceRenderKernel;
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//! OpenCL adaptive anti-aliasing kernel.
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cl_kernel myRaytraceSmoothKernel;
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//! OpenCL image to store environment map.
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cl_mem myRaytraceEnvironment;
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//! OpenCL image to store rendering result.
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cl_mem myRaytraceOutputImage;
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//! OpenCL image to store anti-aliasing result.
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cl_mem myRaytraceOutputImageSmooth;
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//! OpenGL output texture handle.
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GLuint myRaytraceOutputTexture[2];
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//! OpenCL buffer of vertex normals.
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cl_mem myRaytraceNormalBuffer;
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//! OpenCL buffer of vertex coordinates.
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cl_mem myRaytraceVertexBuffer;
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//! OpenCL buffer of indices of triangle vertices.
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cl_mem myRaytraceTriangleBuffer;
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//! OpenCL buffer of minimum points of BVH nodes.
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cl_mem myRaytraceNodeMinPointBuffer;
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//! OpenCL buffer of maximum points of BVH nodes.
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cl_mem myRaytraceNodeMaxPointBuffer;
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//! OpenCL buffer of data records of BVH nodes.
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cl_mem myRaytraceNodeDataRcrdBuffer;
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//! OpenCL buffer of material properties.
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cl_mem myRaytraceMaterialBuffer;
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//! OpenCL buffer of light source properties.
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cl_mem myRaytraceLightSourceBuffer;
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//! State of OpenGL view.
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Standard_Size myViewModificationStatus;
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//! State of OpenGL layer list.
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Standard_Size myLayersModificationStatus;
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//! State of OpenGL elements reflected to ray-tracing.
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std::map<const OpenGl_Structure*, Standard_Size> myStructureStates;
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#endif // HAVE_OPENCL
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protected: //! @name protected fields
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Handle(OpenGl_PrinterContext) myPrintContext;
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Handle(OpenGl_View) myView; // WSViews - now just one view is supported
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Standard_Boolean myIsTransientOpen; // transientOpen
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Standard_Boolean myRetainMode;
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Standard_Boolean myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
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NCollection_Sequence<const OpenGl_Structure*> myTransientList;
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Standard_Boolean myUseTransparency;
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Standard_Boolean myUseZBuffer;
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Standard_Boolean myUseDepthTest;
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Standard_Boolean myUseGLLight;
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Standard_Boolean myBackBufferRestored;
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protected: //! @name fields related to status
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Handle(OpenGl_RenderFilter) myRenderFilter;
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Handle(OpenGl_Texture) myTextureBound; //!< currently bound texture (managed by OpenGl_AspectFace and OpenGl_View environment texture)
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const OpenGl_AspectLine *AspectLine_set, *AspectLine_applied;
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const OpenGl_AspectFace *AspectFace_set, *AspectFace_applied;
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const OpenGl_AspectMarker *AspectMarker_set, *AspectMarker_applied;
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const OpenGl_AspectText *AspectText_set, *AspectText_applied;
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const OpenGl_TextParam *TextParam_set, *TextParam_applied;
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const OpenGl_Matrix* ViewMatrix_applied;
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const OpenGl_Matrix* StructureMatrix_applied;
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const TEL_POFFSET_PARAM* PolygonOffset_applied;
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OpenGl_AspectFace myAspectFaceHl; // Hiddenline aspect
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public: //! @name type definition
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DEFINE_STANDARD_RTTI(OpenGl_Workspace)
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DEFINE_STANDARD_ALLOC
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};
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#endif // _OpenGl_Workspace_Header
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