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122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
// Created on: 2011-11-02
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// Created by: Sergey ZERCHANINOV
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// Copyright (c) 2011-2015 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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#ifndef _OpenGl_Layer_Header
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#define _OpenGl_Layer_Header
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#include <NCollection_Sequence.hxx>
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#include <NCollection_Array1.hxx>
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#include <InterfaceGraphic_telem.hxx>
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#include <Handle_OpenGl_Workspace.hxx>
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#include <OpenGl_BVHClipPrimitiveSet.hxx>
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#include <OpenGl_BVHTreeSelector.hxx>
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#include <Graphic3d_ZLayerSettings.hxx>
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#include <OpenGl_GlCore11.hxx>
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class Handle(OpenGl_Workspace);
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struct OpenGl_GlobalLayerSettings
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{
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GLint DepthFunc;
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GLboolean DepthMask;
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};
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//! Presentations list sorted within priorities.
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class OpenGl_Layer
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{
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public:
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//! Initializes associated priority list and layer properties
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OpenGl_Layer (const Standard_Integer theNbPriorities = 11);
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//! Destructor.
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virtual ~OpenGl_Layer();
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//! Returns settings of the layer object.
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const Graphic3d_ZLayerSettings& LayerSettings() const { return myLayerSettings; };
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//! Sets settings of the layer object.
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void SetLayerSettings (const Graphic3d_ZLayerSettings& theSettings)
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{
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myLayerSettings = theSettings;
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}
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//! Returns true if theSetting is enabled for the layer.
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const Standard_Boolean IsSettingEnabled (const Graphic3d_ZLayerSetting theSetting) const
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{
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return myLayerSettings.IsSettingEnabled (theSetting);
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}
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void Add (const OpenGl_Structure* theStruct,
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const Standard_Integer thePriority,
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Standard_Boolean isForChangePriority = Standard_False);
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//! Remove structure and returns its priority, if the structure is not found, method returns negative value
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bool Remove (const OpenGl_Structure* theStruct,
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Standard_Integer& thePriority,
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Standard_Boolean isForChangePriority = Standard_False);
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//! @return the number of structures
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Standard_Integer NbStructures() const { return myNbStructures; }
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//! Returns the number of available priority levels
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Standard_Integer NbPriorities() const { return myArray.Length(); }
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//! Append layer of acceptable type (with similar number of priorities or less).
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//! Returns Standard_False if the list can not be accepted.
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Standard_Boolean Append (const OpenGl_Layer& theOther);
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//! Returns array of OpenGL structures.
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const OpenGl_ArrayOfIndexedMapOfStructure& ArrayOfStructures() const { return myArray; }
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//! Marks BVH tree for given priority list as dirty and
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//! marks primitive set for rebuild.
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void InvalidateBVHData();
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// Render all structures.
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void Render (const Handle(OpenGl_Workspace)& theWorkspace,
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const OpenGl_GlobalLayerSettings& theDefaultSettings) const;
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protected:
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//! Traverses through BVH tree to determine which structures are in view volume.
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void traverse (OpenGl_BVHTreeSelector& theSelector) const;
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//! Iterates through the hierarchical list of existing structures and renders them all.
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void renderAll (const Handle(OpenGl_Workspace)& theWorkspace) const;
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//! Iterates through the hierarchical list of existing structures and renders only overlapping ones.
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void renderTraverse (const Handle(OpenGl_Workspace)& theWorkspace) const;
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private:
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OpenGl_ArrayOfIndexedMapOfStructure myArray;
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Standard_Integer myNbStructures;
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Graphic3d_ZLayerSettings myLayerSettings; //!< Layer setting flags
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mutable OpenGl_BVHClipPrimitiveSet myBVHPrimitives; //!< Set of OpenGl_Structures for building BVH tree
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mutable Standard_Boolean myBVHIsLeftChildQueuedFirst; //!< Is needed for implementation of stochastic order of BVH traverse
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mutable Standard_Boolean myIsBVHPrimitivesNeedsReset; //!< Defines if the primitive set for BVH is outdated
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public:
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DEFINE_STANDARD_ALLOC
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};
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#endif //_OpenGl_Layer_Header
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