EIC code displayed by LXR master/​include/​opencascade/​OpenGl_View.hxx	Source navigation Diff markup Identifier search General search
	Version: master test Revert   Change

File indexing completed on 2025-01-18 10:04:36

 // Created on: 2011-09-20
 // Created by: Sergey ZERCHANINOV
 // Copyright (c) 2011-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef OpenGl_View_HeaderFile
 #define OpenGl_View_HeaderFile
 
 #include <Graphic3d_CullingTool.hxx>
 #include <Graphic3d_WorldViewProjState.hxx>
 #include <math_BullardGenerator.hxx>
 
 #include <OpenGl_FrameBuffer.hxx>
 #include <OpenGl_FrameStatsPrs.hxx>
 #include <OpenGl_GraduatedTrihedron.hxx>
 #include <OpenGl_LayerList.hxx>
 #include <OpenGl_SceneGeometry.hxx>
 #include <OpenGl_Structure.hxx>
 #include <OpenGl_TileSampler.hxx>
 
 #include <map>
 #include <set>
 
 class OpenGl_BackgroundArray;
 class OpenGl_DepthPeeling;
 class OpenGl_PBREnvironment;
 struct OpenGl_RaytraceMaterial;
 class OpenGl_ShadowMap;
 class OpenGl_ShadowMapArray;
 class OpenGl_ShaderObject;
 class OpenGl_TextureBuffer;
 class OpenGl_Workspace;
 
 DEFINE_STANDARD_HANDLE(OpenGl_View,Graphic3d_CView)
 
 //! Implementation of OpenGl view.
 class OpenGl_View : public Graphic3d_CView
 {
 
 public:
 
   //! Constructor.
   Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
                                const Handle(OpenGl_GraphicDriver)& theDriver,
                                const Handle(OpenGl_Caps)& theCaps,
                                OpenGl_StateCounter* theCounter);
 
   //! Default destructor.
   Standard_EXPORT virtual ~OpenGl_View();
 
   //! Release OpenGL resources.
   Standard_EXPORT virtual void ReleaseGlResources (const Handle(OpenGl_Context)& theCtx);
 
   //! Deletes and erases the view.
   Standard_EXPORT virtual void Remove() Standard_OVERRIDE;
 
   //! @param theDrawToFrontBuffer Advanced option to modify rendering mode:
   //! 1. TRUE.  Drawing immediate mode structures directly to the front buffer over the scene image.
   //! Fast, so preferred for interactive work (used by default).
   //! However these extra drawings will be missed in image dump since it is performed from back buffer.
   //! Notice that since no pre-buffering used the V-Sync will be ignored and rendering could be seen
   //! in run-time (in case of slow hardware) and/or tearing may appear.
   //! So this is strongly recommended to draw only simple (fast) structures.
   //! 2. FALSE. Drawing immediate mode structures to the back buffer.
   //! The complete scene is redrawn first, so this mode is slower if scene contains complex data and/or V-Sync
   //! is turned on. But it works in any case and is especially useful for view dump because the dump image is read
   //! from the back buffer.
   //! @return previous mode.
   Standard_EXPORT Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer) Standard_OVERRIDE;
 
   //! Creates and maps rendering window to the view.
   Standard_EXPORT virtual void SetWindow (const Handle(Graphic3d_CView)& theParentVIew,
                                           const Handle(Aspect_Window)& theWindow,
                                           const Aspect_RenderingContext theContext) Standard_OVERRIDE;
 
   //! Returns window associated with the view.
   Standard_EXPORT virtual Handle(Aspect_Window) Window() const Standard_OVERRIDE;
 
   //! Returns True if the window associated to the view is defined.
   virtual Standard_Boolean IsDefined() const Standard_OVERRIDE
   { return !myWindow.IsNull(); }
 
   //! Handle changing size of the rendering window.
   Standard_EXPORT virtual void Resized() Standard_OVERRIDE;
 
   //! Redraw content of the view.
   Standard_EXPORT virtual void Redraw() Standard_OVERRIDE;
 
   //! Redraw immediate content of the view.
   Standard_EXPORT virtual void RedrawImmediate() Standard_OVERRIDE;
 
   //! Marks BVH tree for given priority list as dirty and marks primitive set for rebuild.
   Standard_EXPORT virtual void Invalidate() Standard_OVERRIDE;
 
   //! Return true if view content cache has been invalidated.
   virtual Standard_Boolean IsInvalidated() Standard_OVERRIDE { return !myBackBufferRestored; }
 
   //! Dump active rendering buffer into specified memory buffer.
   //! In Ray-Tracing allow to get a raw HDR buffer using Graphic3d_BT_RGB_RayTraceHdrLeft buffer type,
   //! only Left view will be dumped ignoring stereoscopic parameter.
   Standard_EXPORT virtual Standard_Boolean BufferDump (Image_PixMap& theImage,
                                                        const Graphic3d_BufferType& theBufferType) Standard_OVERRIDE;
 
   //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
   Standard_EXPORT virtual void InvalidateBVHData (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 
   //! Add a layer to the view.
   //! @param theNewLayerId [in] id of new layer, should be > 0 (negative values are reserved for default layers).
   //! @param theSettings   [in] new layer settings
   //! @param theLayerAfter [in] id of layer to append new layer before
   Standard_EXPORT virtual void InsertLayerBefore (const Graphic3d_ZLayerId theLayerId,
                                                   const Graphic3d_ZLayerSettings& theSettings,
                                                   const Graphic3d_ZLayerId theLayerAfter) Standard_OVERRIDE;
 
   //! Add a layer to the view.
   //! @param theNewLayerId  [in] id of new layer, should be > 0 (negative values are reserved for default layers).
   //! @param theSettings    [in] new layer settings
   //! @param theLayerBefore [in] id of layer to append new layer after
   Standard_EXPORT virtual void InsertLayerAfter (const Graphic3d_ZLayerId theNewLayerId,
                                                  const Graphic3d_ZLayerSettings& theSettings,
                                                  const Graphic3d_ZLayerId theLayerBefore) Standard_OVERRIDE;
 
   //! Remove a z layer with the given ID.
   Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 
   //! Sets the settings for a single Z layer of specified view.
   Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
                                                   const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
 
   //! Returns the maximum Z layer ID.
   //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
   Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
 
   //! Returns the list of layers.
   Standard_EXPORT virtual const NCollection_List<Handle(Graphic3d_Layer)>& Layers() const Standard_OVERRIDE;
 
   //! Returns layer with given ID or NULL if undefined.
   Standard_EXPORT virtual Handle(Graphic3d_Layer) Layer (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
 
   //! Returns the bounding box of all structures displayed in the view.
   //! If theToIncludeAuxiliary is TRUE, then the boundary box also includes minimum and maximum limits
   //! of graphical elements forming parts of infinite and other auxiliary structures.
   //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
   //! @return computed bounding box
   Standard_EXPORT virtual Bnd_Box MinMaxValues (const Standard_Boolean theToIncludeAuxiliary) const Standard_OVERRIDE;
 
   //! Returns pointer to an assigned framebuffer object.
   Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
 
   //! Sets framebuffer object for offscreen rendering.
   Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 
   //! Generate offscreen FBO in the graphic library.
   //! If not supported on hardware returns NULL.
   Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
                                                                 const Standard_Integer theHeight) Standard_OVERRIDE;
 
   //! Remove offscreen FBO from the graphic library
   Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 
   //! Read offscreen FBO configuration.
   Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
                                                  Standard_Integer& theWidth,
                                                  Standard_Integer& theHeight,
                                                  Standard_Integer& theWidthMax,
                                                  Standard_Integer& theHeightMax) Standard_OVERRIDE;
 
   //! Change offscreen FBO viewport.
   Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
                                                   const Standard_Integer theWidth,
                                                   const Standard_Integer theHeight) Standard_OVERRIDE;
 
   //! Returns additional buffers for depth peeling OIT.
   const Handle(OpenGl_DepthPeeling)& DepthPeelingFbos() const { return myDepthPeelingFbos; }
 
 public:
 
   //! Returns gradient background fill colors.
   Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
 
   //! Sets gradient background fill colors.
   Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
 
   //! Sets image texture or environment cubemap as background.
   //! @param theTextureMap [in] source to set a background;
   //!                           should be either Graphic3d_Texture2D or Graphic3d_CubeMap
   //! @param theToUpdatePBREnv [in] defines whether IBL maps will be generated or not
   //!                               (see GeneratePBREnvironment())
   Standard_EXPORT virtual void SetBackgroundImage (const Handle(Graphic3d_TextureMap)& theTextureMap,
                                                    Standard_Boolean theToUpdatePBREnv = Standard_True) Standard_OVERRIDE;
 
   //! Sets environment texture for the view.
   Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
 
   //! Returns background image fill style.
   Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
 
   //! Sets background image fill style.
   Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
 
   //! Enables or disables IBL (Image Based Lighting) from background cubemap.
   //! Has no effect if PBR is not used.
   //! @param[in] theToEnableIBL enable or disable IBL from background cubemap
   //! @param[in] theToUpdate redraw the view
   Standard_EXPORT virtual void SetImageBasedLighting (Standard_Boolean theToEnableIBL) Standard_OVERRIDE;
 
   //! Returns number of mipmap levels used in specular IBL map.
   //! 0 if PBR environment is not created.
   Standard_EXPORT unsigned int SpecIBLMapLevels() const;
 
   //! Returns local camera origin currently set for rendering, might be modified during rendering.
   const gp_XYZ& LocalOrigin() const { return myLocalOrigin; }
 
   //! Setup local camera origin currently set for rendering.
   Standard_EXPORT void SetLocalOrigin (const gp_XYZ& theOrigin);
 
   //! Returns list of lights of the view.
   virtual const Handle(Graphic3d_LightSet)& Lights() const Standard_OVERRIDE { return myLights; }
 
   //! Sets list of lights for the view.
   virtual void SetLights (const Handle(Graphic3d_LightSet)& theLights) Standard_OVERRIDE
   {
     myLights = theLights;
     myCurrLightSourceState = myStateCounter->Increment();
   }
 
   //! Returns list of clip planes set for the view.
   virtual const Handle(Graphic3d_SequenceOfHClipPlane)& ClipPlanes() const Standard_OVERRIDE { return myClipPlanes; }
 
   //! Sets list of clip planes for the view.
   virtual void SetClipPlanes (const Handle(Graphic3d_SequenceOfHClipPlane)& thePlanes) Standard_OVERRIDE { myClipPlanes = thePlanes; }
 
   //! Fill in the dictionary with diagnostic info.
   //! Should be called within rendering thread.
   //!
   //! This API should be used only for user output or for creating automated reports.
   //! The format of returned information (e.g. key-value layout)
   //! is NOT part of this API and can be changed at any time.
   //! Thus application should not parse returned information to weed out specific parameters.
   Standard_EXPORT virtual void DiagnosticInformation (TColStd_IndexedDataMapOfStringString& theDict,
                                                       Graphic3d_DiagnosticInfo theFlags) const Standard_OVERRIDE;
 
   //! Returns string with statistic performance info.
   Standard_EXPORT virtual TCollection_AsciiString StatisticInformation() const Standard_OVERRIDE;
 
   //! Fills in the dictionary with statistic performance info.
   Standard_EXPORT virtual void StatisticInformation (TColStd_IndexedDataMapOfStringString& theDict) const Standard_OVERRIDE;
 
 public:
 
   //! Returns background color.
   const Quantity_ColorRGBA& BackgroundColor() const { return myBgColor; }
 
   //! Change graduated trihedron.
   OpenGl_GraduatedTrihedron& ChangeGraduatedTrihedron() { return myGraduatedTrihedron; }
 
   void SetTextureEnv (const Handle(OpenGl_Context)&       theCtx,
                       const Handle(Graphic3d_TextureEnv)& theTexture);
 
   void SetBackgroundTextureStyle (const Aspect_FillMethod FillStyle);
 
   void SetBackgroundGradient (const Quantity_Color& AColor1, const Quantity_Color& AColor2, const Aspect_GradientFillMethod AType);
 
   void SetBackgroundGradientType (const Aspect_GradientFillMethod AType);
 
   //! Returns list of OpenGL Z-layers.
   const OpenGl_LayerList& LayerList() const { return myZLayers; }
 
   //! Returns OpenGL window implementation.
   const Handle(OpenGl_Window)& GlWindow() const { return myWindow; }
 
   //! Returns OpenGL environment map.
   const Handle(OpenGl_TextureSet)& GlTextureEnv() const { return myTextureEnv; }
 
   //! Returns selector for BVH tree, providing a possibility to store information
   //! about current view volume and to detect which objects are overlapping it.
   const Graphic3d_CullingTool& BVHTreeSelector() const { return myBVHSelector; }
 
   //! Returns true if there are immediate structures to display
   bool HasImmediateStructures() const
   {
     return myZLayers.NbImmediateStructures() != 0;
   }
 
 public: //! @name obsolete Graduated Trihedron functionality
 
   //! Displays Graduated Trihedron.
   Standard_EXPORT virtual void GraduatedTrihedronDisplay (const Graphic3d_GraduatedTrihedron& theTrihedronData) Standard_OVERRIDE;
 
   //! Erases Graduated Trihedron.
   Standard_EXPORT virtual void GraduatedTrihedronErase() Standard_OVERRIDE;
 
   //! Sets minimum and maximum points of scene bounding box for Graduated Trihedron stored in graphic view object.
   //! @param theMin [in] the minimum point of scene.
   //! @param theMax [in] the maximum point of scene.
   Standard_EXPORT virtual void GraduatedTrihedronMinMaxValues (const Graphic3d_Vec3 theMin, const Graphic3d_Vec3 theMax) Standard_OVERRIDE;
 
 protected: //! @name Internal methods for managing GL resources
 
   //! Initializes OpenGl resource for environment texture.
   void initTextureEnv (const Handle(OpenGl_Context)& theContext);
 
 protected: //! @name low-level redrawing sub-routines
 
   //! Prepare frame buffers for rendering.
   Standard_EXPORT virtual bool prepareFrameBuffers (Graphic3d_Camera::Projection& theProj);
 
   //! Redraws view for the given monographic camera projection, or left/right eye.
   Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
                                        OpenGl_FrameBuffer*                theReadDrawFbo,
                                        OpenGl_FrameBuffer*                theOitAccumFbo);
 
   //! Redraws view for the given monographic camera projection, or left/right eye.
   //!
   //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
   //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
   //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
   //! and redraw immediate structures on top.
   //!
   //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
   //! the first step (blitting) will be skipped.
   //!
   //! @return false if immediate structures has been rendered directly into FrontBuffer
   //! and Buffer Swap should not be called.
   Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
                                                 OpenGl_FrameBuffer* theReadFbo,
                                                 OpenGl_FrameBuffer* theDrawFbo,
                                                 OpenGl_FrameBuffer* theOitAccumFbo,
                                                 const Standard_Boolean theIsPartialUpdate = Standard_False);
 
   //! Blit subviews into this view.
   Standard_EXPORT bool blitSubviews (const Graphic3d_Camera::Projection theProjection,
                                      OpenGl_FrameBuffer* theDrawFbo);
 
   //! Blit image from/to specified buffers.
   Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer*    theReadFbo,
                                     OpenGl_FrameBuffer*    theDrawFbo,
                                     const Standard_Boolean theToFlip = Standard_False);
 
   //! Setup default FBO.
   Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
 
 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
 
   //! Renders the graphical contents of the view into the preprepared shadowmap framebuffer.
   //! @param theShadowMap [in] the framebuffer for rendering shadowmap.
   Standard_EXPORT virtual void renderShadowMap (const Handle(OpenGl_ShadowMap)& theShadowMap);
 
   //! Renders the graphical contents of the view into the preprepared window or framebuffer.
   //! @param theProjection [in] the projection that should be used for rendering.
   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
   //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
   Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
                                        OpenGl_FrameBuffer*          theReadDrawFbo,
                                        OpenGl_FrameBuffer*          theOitAccumFbo,
                                        const Standard_Boolean       theToDrawImmediate);
 
   //! Renders the graphical scene.
   //! @param theProjection [in] the projection that is used for rendering.
   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
   //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
   Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
                                             OpenGl_FrameBuffer*    theReadDrawFbo,
                                             OpenGl_FrameBuffer*    theOitAccumFbo,
                                             const Standard_Boolean theToDrawImmediate);
 
   //! Draw background (gradient / image / cubemap)
   Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace,
                                                Graphic3d_Camera::Projection theProjection);
 
   //! Render set of structures presented in the view.
   //! @param theProjection [in] the projection that is used for rendering.
   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
   //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
   Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
                                               OpenGl_FrameBuffer*    theReadDrawFbo,
                                               OpenGl_FrameBuffer*    theOitAccumFbo,
                                               const Standard_Boolean theToDrawImmediate);
 
   //! Renders trihedron.
   void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
 
   //! Renders frame statistics.
   void renderFrameStats();
 
 private:
 
   //! Adds the structure to display lists of the view.
   Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
                                                  const Graphic3d_DisplayPriority thePriority) Standard_OVERRIDE;
 
   //! Erases the structure from display lists of the view.
   Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
 
   //! Change Z layer of a structure already presented in view.
   Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
                                              const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
 
   //! Changes the priority of a structure within its Z layer in the specified view.
   Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
                                                const Graphic3d_DisplayPriority theNewPriority) Standard_OVERRIDE;
 
 private:
 
   //! Release sRGB resources (frame-buffers, textures, etc.).
   void releaseSrgbResources (const Handle(OpenGl_Context)& theCtx);
 
   //! Copy content of Back buffer to the Front buffer.
   bool copyBackToFront();
 
   //! Initialize blit quad.
   OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
 
   //! Blend together views pair into stereo image.
   void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
 
   //! Check and update OIT compatibility with current OpenGL context's state.
   bool checkOitCompatibility (const Handle(OpenGl_Context)& theGlContext,
                               const Standard_Boolean theMSAA);
 
 protected:
 
   OpenGl_GraphicDriver*    myDriver;
   Handle(OpenGl_Window)    myWindow;
   Handle(OpenGl_Workspace) myWorkspace;
   Handle(OpenGl_Caps)      myCaps;
   Standard_Boolean         myWasRedrawnGL;
 
   Handle(Graphic3d_SequenceOfHClipPlane) myClipPlanes;
   gp_XYZ                          myLocalOrigin;
   Handle(OpenGl_FrameBuffer)      myFBO;
   Standard_Boolean                myToShowGradTrihedron;
   Graphic3d_GraduatedTrihedron    myGTrihedronData;
 
   Handle(Graphic3d_LightSet)      myNoShadingLight;
   Handle(Graphic3d_LightSet)      myLights;
   OpenGl_LayerList                myZLayers; //!< main list of displayed structure, sorted by layers
 
   Graphic3d_WorldViewProjState    myWorldViewProjState; //!< camera modification state
   OpenGl_StateCounter*            myStateCounter;
   Standard_Size                   myCurrLightSourceState;
   Standard_Size                   myLightsRevision;
 
   typedef std::pair<Standard_Size, Standard_Size> StateInfo;
 
   StateInfo myLastOrientationState;
   StateInfo myLastViewMappingState;
   StateInfo myLastLightSourceState;
 
   //! Is needed for selection of overlapping objects and storage of the current view volume
   Graphic3d_CullingTool myBVHSelector;
 
   OpenGl_GraduatedTrihedron myGraduatedTrihedron;
   OpenGl_FrameStatsPrs      myFrameStatsPrs;
 
   //! Framebuffers for OpenGL output.
   Handle(OpenGl_FrameBuffer) myOpenGlFBO;
   Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
 
 protected: //! @name Rendering properties
 
   //! Two framebuffers (left and right views) store cached main presentation
   //! of the view (without presentation of immediate layers).
   Standard_Integer           mySRgbState;             //!< track sRGB state
   GLint                      myFboColorFormat;        //!< sized format for color attachments
   GLint                      myFboDepthFormat;        //!< sized format for depth-stencil attachments
   OpenGl_ColorFormats        myFboOitColorConfig;     //!< selected color format configuration for OIT color attachments
   Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
   Handle(OpenGl_FrameBuffer) myMainSceneFbosOit[2];      //!< Additional buffers for transparent draw of main layer.
   Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2];    //!< Additional buffers for immediate layer in stereo mode.
   Handle(OpenGl_FrameBuffer) myImmediateSceneFbosOit[2]; //!< Additional buffers for transparency draw of immediate layer.
   Handle(OpenGl_FrameBuffer) myXrSceneFbo;               //!< additional FBO (without MSAA) for submitting to XR
   Handle(OpenGl_DepthPeeling)   myDepthPeelingFbos;   //!< additional buffers for depth peeling
   Handle(OpenGl_ShadowMapArray) myShadowMaps;         //!< additional FBOs for shadow map rendering
   OpenGl_VertexBuffer        myFullScreenQuad;        //!< Vertices for full-screen quad rendering.
   OpenGl_VertexBuffer        myFullScreenQuadFlip;
   Standard_Boolean           myToFlipOutput;          //!< Flag to draw result image upside-down
   unsigned int               myFrameCounter;          //!< redraw counter, for debugging
   Standard_Boolean           myHasFboBlit;            //!< disable FBOs on failure
   Standard_Boolean           myToDisableOIT;          //!< disable OIT on failure
   Standard_Boolean           myToDisableOITMSAA;      //!< disable OIT with MSAA on failure
   Standard_Boolean           myToDisableMSAA;         //!< disable MSAA after failure
   Standard_Boolean           myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
   Standard_Boolean           myBackBufferRestored;
   Standard_Boolean           myIsImmediateDrawn;     //!< flag indicates that immediate mode buffer contains some data
 
 protected: //! @name Background parameters
 
   OpenGl_Aspects*            myTextureParams;                     //!< Stores texture and its parameters for textured background
   OpenGl_Aspects*            myCubeMapParams;                     //!< Stores cubemap and its parameters for cubemap background
   OpenGl_Aspects*            myColoredQuadParams;                 //!< Stores parameters for gradient (corner mode) background
   OpenGl_BackgroundArray*    myBackgrounds[Graphic3d_TypeOfBackground_NB]; //!< Array of primitive arrays of different background types
   Handle(OpenGl_TextureSet)  myTextureEnv;
   Handle(OpenGl_Texture)     mySkydomeTexture;
 
 protected: //! @name methods related to skydome background
 
   //! Generates skydome cubemap.
   Standard_EXPORT void updateSkydomeBg (const Handle(OpenGl_Context)& theCtx);
 
 protected: //! @name methods related to PBR
 
   //! Checks whether PBR is available.
   Standard_EXPORT Standard_Boolean checkPBRAvailability() const;
 
   //! Generates IBL maps used in PBR pipeline.
   //! If background cubemap is not set clears all IBL maps.
   Standard_EXPORT void updatePBREnvironment (const Handle(OpenGl_Context)& theCtx);
 
 protected: //! @name fields and types related to PBR
 
   //! State of PBR environment.
   enum PBREnvironmentState
   {
     OpenGl_PBREnvState_NONEXISTENT,
     OpenGl_PBREnvState_UNAVAILABLE, // indicates failed try to create PBR environment
     OpenGl_PBREnvState_CREATED
   };
 
   Handle(OpenGl_PBREnvironment) myPBREnvironment; //!< manager of IBL maps used in PBR pipeline
   PBREnvironmentState           myPBREnvState;    //!< state of PBR environment
   Standard_Boolean              myPBREnvRequest;  //!< update PBR environment
 
 protected: //! @name data types related to ray-tracing
 
   //! Result of OpenGL shaders initialization.
   enum RaytraceInitStatus
   {
     OpenGl_RT_NONE,
     OpenGl_RT_INIT,
     OpenGl_RT_FAIL
   };
 
   //! Describes update mode (state).
   enum RaytraceUpdateMode
   {
     OpenGl_GUM_CHECK,   //!< check geometry state
     OpenGl_GUM_PREPARE, //!< collect unchanged objects
     OpenGl_GUM_REBUILD  //!< rebuild changed and new objects
   };
 
   //! Defines frequently used shader variables.
   enum ShaderVariableIndex
   {
     OpenGl_RT_aPosition,
 
     // camera position
     OpenGl_RT_uOriginLT,
     OpenGl_RT_uOriginLB,
     OpenGl_RT_uOriginRT,
     OpenGl_RT_uOriginRB,
     OpenGl_RT_uDirectLT,
     OpenGl_RT_uDirectLB,
     OpenGl_RT_uDirectRT,
     OpenGl_RT_uDirectRB,
     OpenGl_RT_uViewPrMat,
     OpenGl_RT_uUnviewMat,
 
     // 3D scene params
     OpenGl_RT_uSceneRad,
     OpenGl_RT_uSceneEps,
     OpenGl_RT_uLightAmbnt,
     OpenGl_RT_uLightCount,
 
     // background params
     OpenGl_RT_uBackColorTop,
     OpenGl_RT_uBackColorBot,
 
     // ray-tracing params
     OpenGl_RT_uShadowsEnabled,
     OpenGl_RT_uReflectEnabled,
     OpenGl_RT_uEnvMapEnabled,
     OpenGl_RT_uEnvMapForBack,
     OpenGl_RT_uTexSamplersArray,
     OpenGl_RT_uBlockedRngEnabled,
 
     // size of render window
     OpenGl_RT_uWinSizeX,
     OpenGl_RT_uWinSizeY,
 
     // sampled frame params
     OpenGl_RT_uAccumSamples,
     OpenGl_RT_uFrameRndSeed,
 
     // adaptive FSAA params
     OpenGl_RT_uFsaaOffset,
     OpenGl_RT_uSamples,
 
     // images used by ISS mode
     OpenGl_RT_uRenderImage,
     OpenGl_RT_uTilesImage,
     OpenGl_RT_uOffsetImage,
     OpenGl_RT_uTileSize,
     OpenGl_RT_uVarianceScaleFactor,
 
     // maximum radiance value
     OpenGl_RT_uMaxRadiance,
 
     OpenGl_RT_NbVariables // special field
   };
 
   //! Defines OpenGL image samplers.
   enum ShaderImageNames
   {
     OpenGl_RT_OutputImage = 0,
     OpenGl_RT_VisualErrorImage = 1,
     OpenGl_RT_TileOffsetsImage = 2,
     OpenGl_RT_TileSamplesImage = 3
   };
 
   //! Tool class for management of shader sources.
   class ShaderSource
   {
   public:
 
     //! Default shader prefix - empty string.
     static const TCollection_AsciiString EMPTY_PREFIX;
 
     //! Creates new uninitialized shader source.
     ShaderSource()
     {
       //
     }
 
   public:
 
     //! Returns error description in case of load fail.
     const TCollection_AsciiString& ErrorDescription() const
     {
       return myError;
     }
 
     //! Returns prefix to insert before the source.
     const TCollection_AsciiString& Prefix() const
     {
       return myPrefix;
     }
 
     //! Sets prefix to insert before the source.
     void SetPrefix (const TCollection_AsciiString& thePrefix)
     {
       myPrefix = thePrefix;
     }
 
     //! Returns shader source combined with prefix.
     TCollection_AsciiString Source (const Handle(OpenGl_Context)& theCtx,
                                     const GLenum theType) const;
 
     //! Loads shader source from specified files.
     Standard_Boolean LoadFromFiles (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
 
     //! Loads shader source from specified strings.
     Standard_Boolean LoadFromStrings (const TCollection_AsciiString* theStrings, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
 
   private:
 
     TCollection_AsciiString mySource; //!< Source string of the shader object
     TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
     TCollection_AsciiString myError;  //!< error state
 
   };
 
   //! Default ray-tracing depth.
   static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
 
   //! Default size of traversal stack.
   static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
 
   //! Compile-time ray-tracing parameters.
   struct RaytracingParams
   {
     //! Actual size of traversal stack in shader program.
     Standard_Integer StackSize;
 
     //! Actual ray-tracing depth (number of ray bounces).
     Standard_Integer NbBounces;
 
     //! Define depth computation
     Standard_Boolean IsZeroToOneDepth;
 
     //! Enables/disables light propagation through transparent media.
     Standard_Boolean TransparentShadows;
 
     //! Enables/disables global illumination (GI) effects.
     Standard_Boolean GlobalIllumination;
 
     //! Enables/disables the use of OpenGL bindless textures.
     Standard_Boolean UseBindlessTextures;
 
     //! Enables/disables two-sided BSDF models instead of one-sided.
     Standard_Boolean TwoSidedBsdfModels;
 
     //! Enables/disables adaptive screen sampling for path tracing.
     Standard_Boolean AdaptiveScreenSampling;
 
     //! Enables/disables 1-pass atomic mode for AdaptiveScreenSampling.
     Standard_Boolean AdaptiveScreenSamplingAtomic;
 
     //! Enables/disables environment map for background.
     Standard_Boolean UseEnvMapForBackground;
 
     //! Enables/disables normal map ignoring during path tracing.
     Standard_Boolean ToIgnoreNormalMap;
 
     //! Maximum radiance value used for clamping radiance estimation.
     Standard_ShortReal RadianceClampingValue;
     
     //! Enables/disables depth-of-field effect (path tracing, perspective camera).
     Standard_Boolean DepthOfField;
 
     //! Enables/disables cubemap background.
     Standard_Boolean CubemapForBack;
 
     //! Tone mapping method for path tracing.
     Graphic3d_ToneMappingMethod ToneMappingMethod;
 
     //! Creates default compile-time ray-tracing parameters.
     RaytracingParams()
     : StackSize              (THE_DEFAULT_STACK_SIZE),
       NbBounces              (THE_DEFAULT_NB_BOUNCES),
       IsZeroToOneDepth       (Standard_False),
       TransparentShadows     (Standard_False),
       GlobalIllumination     (Standard_False),
       UseBindlessTextures    (Standard_False),
       TwoSidedBsdfModels     (Standard_False),
       AdaptiveScreenSampling (Standard_False),
       AdaptiveScreenSamplingAtomic (Standard_False),
       UseEnvMapForBackground (Standard_False),
       ToIgnoreNormalMap      (Standard_False),
       RadianceClampingValue  (30.0),
       DepthOfField           (Standard_False),
       CubemapForBack         (Standard_False),
       ToneMappingMethod      (Graphic3d_ToneMappingMethod_Disabled) { }
   };
 
   //! Describes state of OpenGL structure.
   struct StructState
   {
     Standard_Size StructureState;
     Standard_Size InstancedState;
 
     //! Creates new structure state.
     StructState (const Standard_Size theStructureState = 0,
                  const Standard_Size theInstancedState = 0)
     : StructureState (theStructureState),
       InstancedState (theInstancedState)
     {
       //
     }
 
     //! Creates new structure state.
     StructState (const OpenGl_Structure* theStructure)
     {
       StructureState = theStructure->ModificationState();
 
       InstancedState = theStructure->InstancedStructure() != NULL ?
         theStructure->InstancedStructure()->ModificationState() : 0;
     }
   };
 
 protected: //! @name methods related to ray-tracing
 
   //! Updates 3D scene geometry for ray-tracing.
   Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode      theMode,
                                            const Standard_Integer        theViewId,
                                            const Handle(OpenGl_Context)& theGlContext);
 
   //! Updates 3D scene light sources for ray-tracing.
   Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
 
   //! Checks to see if the OpenGL structure is modified.
   Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
 
   //! Adds OpenGL structure to ray-traced scene geometry.
   Standard_Boolean addRaytraceStructure (const OpenGl_Structure*       theStructure,
                                          const Handle(OpenGl_Context)& theGlContext);
 
   //! Adds OpenGL groups to ray-traced scene geometry.
   Standard_Boolean addRaytraceGroups (const OpenGl_Structure*        theStructure,
                                       const OpenGl_RaytraceMaterial& theStructMat,
                                       const Handle(TopLoc_Datum3D)&  theTrsf,
                                       const Handle(OpenGl_Context)&  theGlContext);
 
   //! Creates ray-tracing material properties.
   OpenGl_RaytraceMaterial convertMaterial (const OpenGl_Aspects* theAspect,
                                            const Handle(OpenGl_Context)& theGlContext);
 
   //! Adds OpenGL primitive array to ray-traced scene geometry.
   Handle(OpenGl_TriangleSet) addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
                                                         const Standard_Integer       theMatID,
                                                         const OpenGl_Mat4*           theTrans);
 
   //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
   Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet&                  theSet,
                                              const Standard_Integer               theMatID,
                                              const Standard_Integer               theCount,
                                              const Standard_Integer               theOffset,
                                              const OpenGl_PrimitiveArray&         theArray);
 
   //! Adds OpenGL triangle array to ray-traced scene geometry.
   Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet&                  theSet,
                                              const Standard_Integer               theMatID,
                                              const Standard_Integer               theCount,
                                              const Standard_Integer               theOffset,
                                              const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Adds OpenGL triangle fan array to ray-traced scene geometry.
   Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet&                  theSet,
                                                 const Standard_Integer               theMatID,
                                                 const Standard_Integer               theCount,
                                                 const Standard_Integer               theOffset,
                                                 const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Adds OpenGL triangle strip array to ray-traced scene geometry.
   Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet&                  theSet,
                                                   const Standard_Integer               theMatID,
                                                   const Standard_Integer               theCount,
                                                   const Standard_Integer               theOffset,
                                                   const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Adds OpenGL quadrangle array to ray-traced scene geometry.
   Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet&                  theSet,
                                                const Standard_Integer               theMatID,
                                                const Standard_Integer               theCount,
                                                const Standard_Integer               theOffset,
                                                const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
   Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet&                  theSet,
                                                     const Standard_Integer               theMatID,
                                                     const Standard_Integer               theCount,
                                                     const Standard_Integer               theOffset,
                                                     const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Adds OpenGL polygon array to ray-traced scene geometry.
   Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet&                  theSet,
                                             const Standard_Integer               theMatID,
                                             const Standard_Integer               theCount,
                                             const Standard_Integer               theOffset,
                                             const Handle(Graphic3d_IndexBuffer)& theIndices);
 
   //! Uploads ray-trace data to the GPU.
   Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
 
   //! Generates shader prefix based on current ray-tracing options.
   TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
 
   //! Performs safe exit when shaders initialization fails.
   Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
                                  const Handle(OpenGl_Context)&     theGlContext);
 
   //! Loads and compiles shader object from specified source.
   Handle(OpenGl_ShaderObject) initShader (const GLenum                  theType,
                                           const ShaderSource&           theSource,
                                           const Handle(OpenGl_Context)& theGlContext);
 
   //! Creates shader program from the given vertex and fragment shaders.
   Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)&      theGlContext,
                                             const Handle(OpenGl_ShaderObject)& theVertShader,
                                             const Handle(OpenGl_ShaderObject)& theFragShader,
                                             const TCollection_AsciiString& theName);
 
   //! Initializes OpenGL/GLSL shader programs.
   Standard_Boolean initRaytraceResources (const Standard_Integer theSizeX,
                                           const Standard_Integer theSizeY,
                                           const Handle(OpenGl_Context)& theGlContext);
 
   //! Releases OpenGL/GLSL shader programs.
   void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext,
                                  const Standard_Boolean        theToRebuild = Standard_False);
 
   //! Updates auxiliary OpenGL frame buffers.
   Standard_Boolean updateRaytraceBuffers (const Standard_Integer        theSizeX,
                                           const Standard_Integer        theSizeY,
                                           const Handle(OpenGl_Context)& theGlContext);
 
   //! Generates viewing rays for corners of screen quad.
   //! (ray tracing; path tracing for orthographic camera)
   void updateCamera (const OpenGl_Mat4& theOrientation,
                      const OpenGl_Mat4& theViewMapping,
                      OpenGl_Vec3*       theOrigins,
                      OpenGl_Vec3*       theDirects,
                      OpenGl_Mat4&       theView,
                      OpenGl_Mat4&       theUnView);
 
   //! Generate viewing rays (path tracing, perspective camera).
   void updatePerspCameraPT(const OpenGl_Mat4&           theOrientation,
                            const OpenGl_Mat4&           theViewMapping,
                            Graphic3d_Camera::Projection theProjection,
                            OpenGl_Mat4&                 theViewPr,
                            OpenGl_Mat4&                 theUnview,
                            const int                    theWinSizeX,
                            const int                    theWinSizeY);
 
   //! Binds ray-trace textures to corresponding texture units.
   void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext,
                              int theStereoView);
 
   //! Unbinds ray-trace textures from corresponding texture unit.
   void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
 
   //! Sets uniform state for the given ray-tracing shader program.
   Standard_Boolean setUniformState (const Standard_Integer        theProgramId,
                                     const Standard_Integer        theSizeX,
                                     const Standard_Integer        theSizeY,
                                     Graphic3d_Camera::Projection  theProjection,
                                     const Handle(OpenGl_Context)& theGlContext);
 
   //! Runs ray-tracing shader programs.
   Standard_Boolean runRaytraceShaders (const Standard_Integer        theSizeX,
                                        const Standard_Integer        theSizeY,
                                        Graphic3d_Camera::Projection  theProjection,
                                        OpenGl_FrameBuffer*           theReadDrawFbo,
                                        const Handle(OpenGl_Context)& theGlContext);
 
   //! Runs classical (Whitted-style) ray-tracing kernel.
   Standard_Boolean runRaytrace (const Standard_Integer        theSizeX,
                                 const Standard_Integer        theSizeY,
                                 Graphic3d_Camera::Projection  theProjection,
                                 OpenGl_FrameBuffer*           theReadDrawFbo,
                                 const Handle(OpenGl_Context)& theGlContext);
 
   //! Runs path tracing (global illumination) kernel.
   Standard_Boolean runPathtrace (const Standard_Integer        theSizeX,
                                  const Standard_Integer        theSizeY,
                                  Graphic3d_Camera::Projection  theProjection,
                                  const Handle(OpenGl_Context)& theGlContext);
 
   //! Runs path tracing (global illumination) kernel.
   Standard_Boolean runPathtraceOut (Graphic3d_Camera::Projection  theProjection,
                                     OpenGl_FrameBuffer*           theReadDrawFbo,
                                     const Handle(OpenGl_Context)& theGlContext);
 
   //! Redraws the window using OpenGL/GLSL ray-tracing or path tracing.
   Standard_Boolean raytrace (const Standard_Integer        theSizeX,
                              const Standard_Integer        theSizeY,
                              Graphic3d_Camera::Projection  theProjection,
                              OpenGl_FrameBuffer*           theReadDrawFbo,
                              const Handle(OpenGl_Context)& theGlContext);
 
 protected: //! @name fields related to ray-tracing
 
   //! Result of RT/PT shaders initialization.
   RaytraceInitStatus myRaytraceInitStatus;
 
   //! Is ray-tracing geometry data valid?
   Standard_Boolean myIsRaytraceDataValid;
 
   //! True if warning about missing extension GL_ARB_bindless_texture has been displayed.
   Standard_Boolean myIsRaytraceWarnTextures;
 
   //! 3D scene geometry data for ray-tracing.
   OpenGl_RaytraceGeometry myRaytraceGeometry;
 
   //! Builder for triangle set.
   opencascade::handle<BVH_Builder<Standard_ShortReal, 3> > myRaytraceBVHBuilder;
 
   //! Compile-time ray-tracing parameters.
   RaytracingParams myRaytraceParameters;
 
   //! Radius of bounding sphere of the scene.
   Standard_ShortReal myRaytraceSceneRadius;
   //! Scene epsilon to prevent self-intersections.
   Standard_ShortReal myRaytraceSceneEpsilon;
 
   //! OpenGL/GLSL source of ray-tracing fragment shader.
   ShaderSource myRaytraceShaderSource;
   //! OpenGL/GLSL source of adaptive-AA fragment shader.
   ShaderSource myPostFSAAShaderSource;
   //! OpenGL/GLSL source of RT/PT display fragment shader.
   ShaderSource myOutImageShaderSource;
 
   //! OpenGL/GLSL ray-tracing fragment shader.
   Handle(OpenGl_ShaderObject) myRaytraceShader;
   //! OpenGL/GLSL adaptive-AA fragment shader.
   Handle(OpenGl_ShaderObject) myPostFSAAShader;
   //! OpenGL/GLSL ray-tracing display fragment shader.
   Handle(OpenGl_ShaderObject) myOutImageShader;
 
   //! OpenGL/GLSL ray-tracing shader program.
   Handle(OpenGl_ShaderProgram) myRaytraceProgram;
   //! OpenGL/GLSL adaptive-AA shader program.
   Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
   //! OpenGL/GLSL program for displaying texture.
   Handle(OpenGl_ShaderProgram) myOutImageProgram;
 
   //! Texture buffer of data records of bottom-level BVH nodes.
   Handle(OpenGl_TextureBuffer) mySceneNodeInfoTexture;
   //! Texture buffer of minimum points of bottom-level BVH nodes.
   Handle(OpenGl_TextureBuffer) mySceneMinPointTexture;
   //! Texture buffer of maximum points of bottom-level BVH nodes.
   Handle(OpenGl_TextureBuffer) mySceneMaxPointTexture;
   //! Texture buffer of transformations of high-level BVH nodes.
   Handle(OpenGl_TextureBuffer) mySceneTransformTexture;
 
   //! Texture buffer of vertex coords.
   Handle(OpenGl_TextureBuffer) myGeometryVertexTexture;
   //! Texture buffer of vertex normals.
   Handle(OpenGl_TextureBuffer) myGeometryNormalTexture;
   //! Texture buffer of vertex UV coords.
   Handle(OpenGl_TextureBuffer) myGeometryTexCrdTexture;
   //! Texture buffer of triangle indices.
   Handle(OpenGl_TextureBuffer) myGeometryTriangTexture;
 
   //! Texture buffer of material properties.
   Handle(OpenGl_TextureBuffer) myRaytraceMaterialTexture;
   //! Texture buffer of light source properties.
   Handle(OpenGl_TextureBuffer) myRaytraceLightSrcTexture;
 
   //! 1st framebuffer (FBO) to perform adaptive FSAA.
   //! Used in compatibility mode (no adaptive sampling).
   Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
   //! 2nd framebuffer (FBO) to perform adaptive FSAA.
   //! Used in compatibility mode (no adaptive sampling).
   Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
 
   //! Output textures (2 textures are used in stereo mode).
   //! Used if adaptive screen sampling is activated.
   Handle(OpenGl_Texture) myRaytraceOutputTexture[2];
 
   //! Texture containing per-tile visual error estimation (2 textures are used in stereo mode).
   //! Used if adaptive screen sampling is activated.
   Handle(OpenGl_Texture) myRaytraceVisualErrorTexture[2];
   //! Texture containing offsets of sampled screen tiles (2 textures are used in stereo mode).
   //! Used if adaptive screen sampling is activated.
   Handle(OpenGl_Texture) myRaytraceTileOffsetsTexture[2];
   //! Texture containing amount of extra per-tile samples (2 textures are used in stereo mode).
   //! Used if adaptive screen sampling is activated.
   Handle(OpenGl_Texture) myRaytraceTileSamplesTexture[2];
 
   //! Vertex buffer (VBO) for drawing dummy quad.
   OpenGl_VertexBuffer myRaytraceScreenQuad;
 
   //! Cached locations of frequently used uniform variables.
   Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
 
   //! State of OpenGL structures reflected to ray-tracing.
   std::map<const OpenGl_Structure*, StructState> myStructureStates;
 
   //! PrimitiveArray to TriangleSet map for scene partial update.
   std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
 
   //! Set of IDs of non-raytracable elements (to detect updates).
   std::set<Standard_Integer> myNonRaytraceStructureIDs;
 
   //! Marks if environment map should be updated.
   Standard_Boolean myToUpdateEnvironmentMap;
 
   //! State of OpenGL layer list.
   Standard_Size myRaytraceLayerListState;
 
   //! Number of accumulated frames (for progressive rendering).
   Standard_Integer myAccumFrames;
 
   //! Stored ray origins used for detection of camera movements.
   OpenGl_Vec3 myPreviousOrigins[3];
 
   //! Bullard RNG to produce random sequence.
   math_BullardGenerator myRNG;
 
   //! Tool object for sampling screen tiles in PT mode.
   OpenGl_TileSampler myTileSampler;
 
   //! Camera position used for projective mode
   OpenGl_Vec3 myEyeOrig;
 
   //! Camera view direction used for projective mode
   OpenGl_Vec3 myEyeView;
 
   //! Camera's screen vertical direction used for projective mode
   OpenGl_Vec3 myEyeVert;
 
   //! Camera's screen horizontal direction used for projective mode
   OpenGl_Vec3 myEyeSide;
 
   //! Camera's screen size used for projective mode
   OpenGl_Vec2 myEyeSize;
 
   //! Aperture radius of camera on previous frame used for depth-of-field (path tracing)
   float myPrevCameraApertureRadius;
 
   //! Focal distance of camera on previous frame used for depth-of-field (path tracing)
   float myPrevCameraFocalPlaneDist;
 
 public:
 
   DEFINE_STANDARD_ALLOC
   DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
 
   friend class OpenGl_GraphicDriver;
   friend class OpenGl_Workspace;
   friend class OpenGl_LayerList;
   friend class OpenGl_FrameStats;
 };
 
 #endif // _OpenGl_View_Header

This page was automatically generated by the 2.3.7 LXR engine. The LXR team