src/OpenGl/OpenGl_View.hxx

   1 // Created on: 2011-09-20
   2 // Created by: Sergey ZERCHANINOV
   3 // Copyright (c) 2011-2014 OPEN CASCADE SAS
   4 //
   5 // This file is part of Open CASCADE Technology software library.
   6 //
   7 // This library is free software; you can redistribute it and/or modify it under
   8 // the terms of the GNU Lesser General Public License version 2.1 as published
   9 // by the Free Software Foundation, with special exception defined in the file
  10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  11 // distribution for complete text of the license and disclaimer of any warranty.
  12 //
  13 // Alternatively, this file may be used under the terms of Open CASCADE
  14 // commercial license or contractual agreement.
  15
  16 #ifndef _OpenGl_View_Header
  17 #define _OpenGl_View_Header
  18
  19 #include <MMgt_TShared.hxx>
  20 #include <Standard_Type.hxx>
  21
  22 #include <TColStd_Array2OfReal.hxx>
  23 #include <NCollection_List.hxx>
  24 #include <math_BullardGenerator.hxx>
  25
  26 #include <Quantity_NameOfColor.hxx>
  27 #include <Aspect_FillMethod.hxx>
  28 #include <Aspect_GradientFillMethod.hxx>
  29 #include <Aspect_TypeOfTriedronPosition.hxx>
  30
  31 #include <Graphic3d_CView.hxx>
  32 #include <Graphic3d_GraduatedTrihedron.hxx>
  33 #include <Graphic3d_SequenceOfHClipPlane.hxx>
  34 #include <Graphic3d_TypeOfShadingModel.hxx>
  35 #include <Graphic3d_WorldViewProjState.hxx>
  36 #include <Graphic3d_ZLayerSettings.hxx>
  37
  38 #include <OpenGl_AspectFace.hxx>
  39 #include <OpenGl_BackgroundArray.hxx>
  40 #include <OpenGl_BVHTreeSelector.hxx>
  41 #include <OpenGl_Context.hxx>
  42 #include <OpenGl_FrameBuffer.hxx>
  43 #include <OpenGl_GraduatedTrihedron.hxx>
  44 #include <OpenGl_LayerList.hxx>
  45 #include <OpenGl_Light.hxx>
  46 #include <OpenGl_LineAttributes.hxx>
  47 #include <OpenGl_SceneGeometry.hxx>
  48 #include <OpenGl_Structure.hxx>
  49 #include <OpenGl_Trihedron.hxx>
  50 #include <OpenGl_Window.hxx>
  51 #include <OpenGl_Workspace.hxx>
  52
  53 #include <map>
  54 #include <set>
  55
  56 struct OpenGl_Matrix;
  57
  58 class Graphic3d_StructureManager;
  59 class OpenGl_GraphicDriver;
  60 class OpenGl_StateCounter;
  61 class OpenGl_RaytraceMaterial;
  62 class OpenGl_TriangleSet;
  63 class OpenGl_Workspace;
  64 class OpenGl_View;
  65 DEFINE_STANDARD_HANDLE(OpenGl_View,Graphic3d_CView)
  66
  67 //! Implementation of OpenGl view.
  68 class OpenGl_View : public Graphic3d_CView
  69 {
  70
  71 public:
  72
  73   //! Constructor.
  74   Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
  75                                const Handle(OpenGl_GraphicDriver)& theDriver,
  76                                const Handle(OpenGl_Caps)& theCaps,
  77                                Standard_Boolean& theDeviceLostFlag,
  78                                OpenGl_StateCounter* theCounter);
  79
  80   //! Default destructor.
  81   Standard_EXPORT virtual ~OpenGl_View();
  82
  83   Standard_EXPORT void ReleaseGlResources (const Handle(OpenGl_Context)& theCtx);
  84
  85   //! Deletes and erases the view.
  86   Standard_EXPORT virtual void Remove() Standard_OVERRIDE;
  87
  88   //! @param theDrawToFrontBuffer Advanced option to modify rendering mode:
  89   //! 1. TRUE.  Drawing immediate mode structures directly to the front buffer over the scene image.
  90   //! Fast, so preferred for interactive work (used by default).
  91   //! However these extra drawings will be missed in image dump since it is performed from back buffer.
  92   //! Notice that since no pre-buffering used the V-Sync will be ignored and rendering could be seen
  93   //! in run-time (in case of slow hardware) and/or tearing may appear.
  94   //! So this is strongly recommended to draw only simple (fast) structures.
  95   //! 2. FALSE. Drawing immediate mode structures to the back buffer.
  96   //! The complete scene is redrawn first, so this mode is slower if scene contains complex data and/or V-Sync
  97   //! is turned on. But it works in any case and is especially useful for view dump because the dump image is read
  98   //! from the back buffer.
  99   //! @return previous mode.
 100   Standard_EXPORT Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer) Standard_OVERRIDE;
 101
 102   //! Creates and maps rendering window to the view.
 103   //! @param theWindow [in] the window.
 104   //! @param theContext [in] the rendering context. If NULL the context will be created internally.
 105   Standard_EXPORT virtual void SetWindow (const Handle(Aspect_Window)&  theWindow,
 106                                           const Aspect_RenderingContext theContext) Standard_OVERRIDE;
 107
 108   //! Returns window associated with the view.
 109   virtual Handle(Aspect_Window) Window() const Standard_OVERRIDE
 110   { return myWindow->PlatformWindow(); }
 111
 112   //! Returns True if the window associated to the view is defined.
 113   virtual Standard_Boolean IsDefined() const Standard_OVERRIDE
 114   { return !myWindow.IsNull(); }
 115
 116   //! Handle changing size of the rendering window.
 117   Standard_EXPORT virtual void Resized() Standard_OVERRIDE;
 118
 119   //! Redraw content of the view.
 120   Standard_EXPORT virtual void Redraw() Standard_OVERRIDE;
 121
 122   //! Redraw immediate content of the view.
 123   Standard_EXPORT virtual void RedrawImmediate() Standard_OVERRIDE;
 124
 125   //! Marks BVH tree for given priority list as dirty and marks primitive set for rebuild.
 126   Standard_EXPORT virtual void Invalidate() Standard_OVERRIDE;
 127
 128   //! Return true if view content cache has been invalidated.
 129   virtual Standard_Boolean IsInvalidated() Standard_OVERRIDE { return !myBackBufferRestored; }
 130
 131   //! Displays z-buffer trihedron.
 132   Standard_EXPORT virtual void TriedronDisplay (const Aspect_TypeOfTriedronPosition thePosition = Aspect_TOTP_CENTER,
 133                                                 const Quantity_NameOfColor theColor = Quantity_NOC_WHITE,
 134                                                 const Standard_Real theScale = 0.02,
 135                                                 const Standard_Boolean theAsWireframe = Standard_True) Standard_OVERRIDE;
 136
 137   //! Erases z-buffer trihedron.
 138   Standard_EXPORT virtual void TriedronErase() Standard_OVERRIDE;
 139
 140   //! Setup parameters of z-buffer trihedron.
 141   Standard_EXPORT virtual void ZBufferTriedronSetup (const Quantity_NameOfColor theXColor = Quantity_NOC_RED,
 142                                                      const Quantity_NameOfColor theYColor = Quantity_NOC_GREEN,
 143                                                      const Quantity_NameOfColor theZColor = Quantity_NOC_BLUE1,
 144                                                      const Standard_Real theSizeRatio = 0.8,
 145                                                      const Standard_Real theAxisDiametr = 0.05,
 146                                                      const Standard_Integer theNbFacettes = 12) Standard_OVERRIDE;
 147
 148   //! Displays trihedron echo.
 149   Standard_EXPORT virtual void TriedronEcho (const Aspect_TypeOfTriedronEcho theType = Aspect_TOTE_NONE) Standard_OVERRIDE;
 150
 151   //! Returns data of a graduated trihedron
 152   const Graphic3d_GraduatedTrihedron& GetGraduatedTrihedron() Standard_OVERRIDE
 153   { return myGTrihedronData; }
 154
 155   //! Displays Graduated Trihedron.
 156   Standard_EXPORT virtual void GraduatedTrihedronDisplay (const Graphic3d_GraduatedTrihedron& theTrihedronData) Standard_OVERRIDE;
 157
 158   //! Erases Graduated Trihedron.
 159   Standard_EXPORT virtual void GraduatedTrihedronErase() Standard_OVERRIDE;
 160
 161   //! Sets minimum and maximum points of scene bounding box for Graduated Trihedron stored in graphic view object.
 162   //! @param theMin [in] the minimum point of scene.
 163   //! @param theMax [in] the maximum point of scene.
 164   Standard_EXPORT virtual void GraduatedTrihedronMinMaxValues (const Graphic3d_Vec3 theMin, const Graphic3d_Vec3 theMax) Standard_OVERRIDE;
 165
 166   //! Dump active rendering buffer into specified memory buffer.
 167   Standard_EXPORT virtual Standard_Boolean BufferDump (Image_PixMap& theImage,
 168                                                        const Graphic3d_BufferType& theBufferType) Standard_OVERRIDE;
 169
 170   //! Export scene into the one of the Vector graphics formats (SVG, PS, PDF...).
 171   //! In contrast to Bitmaps, Vector graphics is scalable (so you may got quality benefits
 172   //! on printing to laser printer). Notice however that results may differ a lot and
 173   //! do not contain some elements.
 174   Standard_EXPORT virtual Standard_Boolean Export (const Standard_CString theFileName,
 175                                                    const Graphic3d_ExportFormat theFormat,
 176                                                    const Graphic3d_SortType theSortType = Graphic3d_ST_BSP_Tree) Standard_OVERRIDE;
 177
 178   //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
 179   Standard_EXPORT virtual void InvalidateBVHData (const Standard_Integer theLayerId) Standard_OVERRIDE;
 180
 181   //! Insert a new top-level z layer with the given ID.
 182   Standard_EXPORT virtual void AddZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 183
 184   //! Remove a z layer with the given ID.
 185   Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 186
 187   //! Sets the settings for a single Z layer of specified view.
 188   Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
 189                                                   const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
 190
 191   //! Returns the maximum Z layer ID.
 192   //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
 193   Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
 194
 195   //! Returns the bounding box of all structures displayed in the Z layer.
 196   //! Never fails. If Z layer does not exist nothing happens.
 197   Standard_EXPORT virtual void InvalidateZLayerBoundingBox (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
 198
 199   //! Returns the bounding box of all structures displayed in the Z layer.
 200   //! If Z layer does not exist the empty box is returned.
 201   //! @param theLayerId            layer identifier
 202   //! @param theCamera             camera definition
 203   //! @param theWindowWidth        viewport width  (for applying transformation-persistence)
 204   //! @param theWindowHeight       viewport height (for applying transformation-persistence)
 205   //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
 206   //! @return computed bounding box
 207   Standard_EXPORT virtual Graphic3d_BndBox4f ZLayerBoundingBox (const Graphic3d_ZLayerId        theLayerId,
 208                                                                 const Handle(Graphic3d_Camera)& theCamera,
 209                                                                 const Standard_Integer          theWindowWidth,
 210                                                                 const Standard_Integer          theWindowHeight,
 211                                                                 const Standard_Boolean          theToIncludeAuxiliary) const Standard_OVERRIDE;
 212
 213   //! Returns pointer to an assigned framebuffer object.
 214   Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
 215
 216   //! Sets framebuffer object for offscreen rendering.
 217   Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 218
 219   //! Generate offscreen FBO in the graphic library.
 220   //! If not supported on hardware returns NULL.
 221   Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
 222                                                                 const Standard_Integer theHeight) Standard_OVERRIDE;
 223
 224   //! Remove offscreen FBO from the graphic library
 225   Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 226
 227   //! Read offscreen FBO configuration.
 228   Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
 229                                                  Standard_Integer& theWidth,
 230                                                  Standard_Integer& theHeight,
 231                                                  Standard_Integer& theWidthMax,
 232                                                  Standard_Integer& theHeightMax) Standard_OVERRIDE;
 233
 234   //! Change offscreen FBO viewport.
 235   Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
 236                                                   const Standard_Integer theWidth,
 237                                                   const Standard_Integer theHeight) Standard_OVERRIDE;
 238
 239 public:
 240
 241   //! Returns background  fill color.
 242   Standard_EXPORT virtual Aspect_Background Background() const Standard_OVERRIDE;
 243
 244   //! Sets background fill color.
 245   Standard_EXPORT virtual void SetBackground (const Aspect_Background& theBackground) Standard_OVERRIDE;
 246
 247   //! Returns gradient background fill colors.
 248   Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
 249
 250   //! Sets gradient background fill colors.
 251   Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
 252
 253   //! Returns background image texture file path.
 254   Standard_EXPORT virtual TCollection_AsciiString BackgroundImage() Standard_OVERRIDE { return myBackgroundImagePath; }
 255
 256   //! Sets background image texture file path.
 257   Standard_EXPORT virtual void SetBackgroundImage (const TCollection_AsciiString& theFilePath) Standard_OVERRIDE;
 258
 259   //! Returns background image fill style.
 260   Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
 261
 262   //! Sets background image fill style.
 263   Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
 264
 265   //! Returns environment texture set for the view.
 266   Standard_EXPORT virtual Handle(Graphic3d_TextureEnv) TextureEnv() const Standard_OVERRIDE { return myTextureEnvData; }
 267
 268   //! Sets environment texture for the view.
 269   Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
 270
 271   //! Returns the state of frustum culling optimization.
 272   virtual Standard_Boolean IsCullingEnabled() const Standard_OVERRIDE { return myCulling; }
 273
 274   //! Enables or disables frustum culling optimization.
 275   virtual void SetCullingEnabled (const Standard_Boolean theIsEnabled) Standard_OVERRIDE { myCulling = theIsEnabled; }
 276
 277   //! Returns shading model of the view.
 278   virtual Graphic3d_TypeOfShadingModel ShadingModel() const Standard_OVERRIDE { return myShadingModel; }
 279
 280   //! Sets shading model of the view.
 281   virtual void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel) Standard_OVERRIDE { myShadingModel = theModel; }
 282
 283   //! Return backfacing model used for the view.
 284   virtual Graphic3d_TypeOfBackfacingModel BackfacingModel() const Standard_OVERRIDE { return myBackfacing; }
 285
 286   //! Sets backfacing model for the view.
 287   virtual void SetBackfacingModel (const Graphic3d_TypeOfBackfacingModel theModel) Standard_OVERRIDE { myBackfacing = theModel; }
 288
 289   //! Returns camera object of the view.
 290   virtual const Handle(Graphic3d_Camera)& Camera() const Standard_OVERRIDE { return myCamera; }
 291
 292   //! Sets camera used by the view.
 293   virtual void SetCamera (const Handle(Graphic3d_Camera)& theCamera) Standard_OVERRIDE { myCamera = theCamera; }
 294
 295   //! Returns true if GL lighting is enabled.
 296   virtual Standard_Boolean IsGLLightEnabled() const Standard_OVERRIDE { return myUseGLLight; }
 297
 298   //! Sets GL lighting enabled or disable state.
 299   virtual void SetGLLightEnabled (const Standard_Boolean theIsEnabled) Standard_OVERRIDE { myUseGLLight = theIsEnabled; }
 300
 301   //! Returns list of lights of the view.
 302   virtual const Graphic3d_ListOfCLight& Lights() const Standard_OVERRIDE { return myLights; }
 303
 304   //! Sets list of lights for the view.
 305   virtual void SetLights (const Graphic3d_ListOfCLight& theLights) Standard_OVERRIDE
 306   {
 307     myLights = theLights;
 308     myCurrLightSourceState = myStateCounter->Increment();
 309   }
 310
 311   //! Returns list of clip planes set for the view.
 312   virtual const Graphic3d_SequenceOfHClipPlane& ClipPlanes() const Standard_OVERRIDE { return myClipPlanes; }
 313
 314   //! Sets list of clip planes for the view.
 315   virtual void SetClipPlanes (const Graphic3d_SequenceOfHClipPlane& thePlanes) Standard_OVERRIDE { myClipPlanes = thePlanes; }
 316
 317 public:
 318
 319   //! Returns background color.
 320   const Quantity_ColorRGBA& BackgroundColor() const { return myBgColor; }
 321
 322   //! Change trihedron.
 323   OpenGl_Trihedron& ChangeTrihedron() { return myTrihedron; }
 324
 325   //! Change graduated trihedron.
 326   OpenGl_GraduatedTrihedron& ChangeGraduatedTrihedron() { return myGraduatedTrihedron; }
 327
 328   void SetTextureEnv (const Handle(OpenGl_Context)&       theCtx,
 329                       const Handle(Graphic3d_TextureEnv)& theTexture);
 330
 331   void SetBackgroundTextureStyle (const Aspect_FillMethod FillStyle);
 332
 333   void SetBackgroundGradient (const Quantity_Color& AColor1, const Quantity_Color& AColor2, const Aspect_GradientFillMethod AType);
 334
 335   void SetBackgroundGradientType (const Aspect_GradientFillMethod AType);
 336
 337   //! Returns list of OpenGL Z-layers.
 338   const OpenGl_LayerList& LayerList() const { return myZLayers; }
 339
 340   //! Returns list of openGL light sources.
 341   const OpenGl_ListOfLight& LightList() const { return myLights; }
 342
 343   //! Returns OpenGL window implementation.
 344   const Handle(OpenGl_Window) GlWindow() const { return myWindow; }
 345
 346   //! Returns OpenGL environment map.
 347   const Handle(OpenGl_Texture)& GlTextureEnv() const { return myTextureEnv; }
 348
 349   //! Returns selector for BVH tree, providing a possibility to store information
 350   //! about current view volume and to detect which objects are overlapping it.
 351   OpenGl_BVHTreeSelector& BVHTreeSelector() { return myBVHSelector; }
 352
 353   //! Returns true if there are immediate structures to display
 354   bool HasImmediateStructures() const
 355   {
 356     return myZLayers.NbImmediateStructures() != 0;
 357   }
 358
 359 protected: //! @name Internal methods for managing GL resources
 360
 361   //! Initializes OpenGl resource for environment texture.
 362   void initTextureEnv (const Handle(OpenGl_Context)& theContext);
 363
 364 protected: //! @name low-level redrawing sub-routines
 365
 366   //! Redraws view for the given monographic camera projection, or left/right eye.
 367   Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
 368                                        OpenGl_FrameBuffer*                theReadDrawFbo);
 369
 370   //! Redraws view for the given monographic camera projection, or left/right eye.
 371   //!
 372   //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
 373   //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
 374   //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
 375   //! and redraw immediate structures on top.
 376   //!
 377   //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
 378   //! the first step (blitting) will be skipped.
 379   //!
 380   //! @return false if immediate structures has been rendered directly into FrontBuffer
 381   //! and Buffer Swap should not be called.
 382   Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
 383                                                 OpenGl_FrameBuffer* theReadFbo,
 384                                                 OpenGl_FrameBuffer* theDrawFbo,
 385                                                 const Standard_Boolean theIsPartialUpdate = Standard_False);
 386
 387   //! Blit image from/to specified buffers.
 388   Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer*    theReadFbo,
 389                                     OpenGl_FrameBuffer*    theDrawFbo,
 390                                     const Standard_Boolean theToFlip = Standard_False);
 391
 392   //! Setup default FBO.
 393   Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
 394
 395 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
 396
 397   //! Renders the graphical contents of the view into the preprepared window or framebuffer.
 398   //! @param theProjection [in] the projection that should be used for rendering.
 399   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 400   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 401   Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
 402                                        OpenGl_FrameBuffer*          theReadDrawFbo,
 403                                        const Standard_Boolean       theToDrawImmediate);
 404
 405   //! Renders the graphical scene.
 406   //! @param theProjection [in] the projection that is used for rendering.
 407   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 408   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 409   Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
 410                                             OpenGl_FrameBuffer*    theReadDrawFbo,
 411                                             const Standard_Boolean theToDrawImmediate);
 412
 413   //! Draw background (gradient / image)
 414   Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace);
 415
 416   //! Render set of structures presented in the view.
 417   //! @param theProjection [in] the projection that is used for rendering.
 418   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 419   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 420   Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
 421                                               OpenGl_FrameBuffer*    theReadDrawFbo,
 422                                               const Standard_Boolean theToDrawImmediate);
 423
 424   //! Renders trihedron.
 425   void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
 426
 427 private:
 428
 429   //! Adds the structure to display lists of the view.
 430   Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
 431                                                  const Standard_Integer thePriority) Standard_OVERRIDE;
 432
 433   //! Erases the structure from display lists of the view.
 434   Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
 435
 436   //! Change Z layer of a structure already presented in view.
 437   Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
 438                                              const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
 439
 440   //! Changes the priority of a structure within its Z layer in the specified view.
 441   Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
 442                                                const Standard_Integer theNewPriority) Standard_OVERRIDE;
 443
 444   //! Returns zoom-scale factor.
 445   Standard_EXPORT virtual Standard_Real considerZoomPersistenceObjects (const Graphic3d_ZLayerId        theLayerId,
 446                                                                         const Handle(Graphic3d_Camera)& theCamera,
 447                                                                         const Standard_Integer          theWindowWidth,
 448                                                                         const Standard_Integer          theWindowHeight) const Standard_OVERRIDE;
 449
 450 private:
 451
 452   //! Copy content of Back buffer to the Front buffer.
 453   void copyBackToFront();
 454
 455   //! Initialize blit quad.
 456   OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
 457
 458   //! Blend together views pair into stereo image.
 459   void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
 460
 461 protected:
 462
 463   OpenGl_GraphicDriver*    myDriver;
 464   Handle(OpenGl_Window)    myWindow;
 465   Handle(OpenGl_Workspace) myWorkspace;
 466   Handle(OpenGl_Caps)      myCaps;
 467   Standard_Boolean&        myDeviceLostFlag;
 468   Standard_Boolean         myWasRedrawnGL;
 469
 470   Standard_Boolean                myCulling;
 471   Graphic3d_TypeOfShadingModel    myShadingModel;
 472   Graphic3d_TypeOfBackfacingModel myBackfacing;
 473   Quantity_ColorRGBA              myBgColor;
 474   Graphic3d_SequenceOfHClipPlane  myClipPlanes;
 475   Handle(Graphic3d_Camera)        myCamera;
 476   Handle(OpenGl_FrameBuffer)      myFBO;
 477   Standard_Boolean                myUseGLLight;
 478   Standard_Boolean                myToShowTrihedron;
 479   Standard_Boolean                myToShowGradTrihedron;
 480   TCollection_AsciiString         myBackgroundImagePath;
 481   Handle(Graphic3d_TextureEnv)    myTextureEnvData;
 482   Graphic3d_GraduatedTrihedron    myGTrihedronData;
 483
 484   OpenGl_ListOfLight              myNoShadingLight;
 485   OpenGl_ListOfLight              myLights;
 486   OpenGl_LayerList                myZLayers; //!< main list of displayed structure, sorted by layers
 487
 488   Graphic3d_WorldViewProjState    myWorldViewProjState; //!< camera modification state
 489   OpenGl_StateCounter*            myStateCounter;
 490   Standard_Size                   myCurrLightSourceState;
 491
 492   typedef std::pair<Standard_Size, Standard_Size> StateInfo;
 493
 494   StateInfo myLastOrientationState;
 495   StateInfo myLastViewMappingState;
 496   StateInfo myLastLightSourceState;
 497
 498   //! Is needed for selection of overlapping objects and storage of the current view volume
 499   OpenGl_BVHTreeSelector myBVHSelector;
 500
 501   OpenGl_Trihedron          myTrihedron;
 502   OpenGl_GraduatedTrihedron myGraduatedTrihedron;
 503
 504   Handle(OpenGl_Texture) myTextureEnv;
 505
 506 protected: //! @name Rendering properties
 507
 508   //! Two framebuffers (left and right views) store cached main presentation
 509   //! of the view (without presentation of immediate layers).
 510   GLint                      myFboColorFormat;        //!< sized format for color attachments
 511   GLint                      myFboDepthFormat;        //!< sized format for depth-stencil attachments
 512   Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
 513   Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2]; //!< Additional buffers for immediate layer in stereo mode.
 514   OpenGl_VertexBuffer        myFullScreenQuad;        //!< Vertices for full-screen quad rendering.
 515   OpenGl_VertexBuffer        myFullScreenQuadFlip;
 516   Standard_Boolean           myToFlipOutput;          //!< Flag to draw result image upside-down
 517   unsigned int               myFrameCounter;          //!< redraw counter, for debugging
 518   Standard_Boolean           myHasFboBlit;            //!< disable FBOs on failure
 519   Standard_Boolean           myToDisableMSAA;         //!< disable MSAA after failure
 520   Standard_Boolean           myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
 521   Standard_Boolean           myBackBufferRestored;
 522   Standard_Boolean           myIsImmediateDrawn;     //!< flag indicates that immediate mode buffer contains some data
 523
 524 protected: //! @name Background parameters
 525
 526   OpenGl_AspectFace*      myTextureParams;   //!< Stores texture and its parameters for textured background
 527   OpenGl_BackgroundArray* myBgGradientArray; //!< Primitive array for gradient background
 528   OpenGl_BackgroundArray* myBgTextureArray;  //!< Primitive array for texture  background
 529
 530 protected: //! @name data types related to ray-tracing
 531
 532   //! Result of OpenGL shaders initialization.
 533   enum RaytraceInitStatus
 534   {
 535     OpenGl_RT_NONE,
 536     OpenGl_RT_INIT,
 537     OpenGl_RT_FAIL
 538   };
 539
 540   //! Describes update mode (state).
 541   enum RaytraceUpdateMode
 542   {
 543     OpenGl_GUM_CHECK,   //!< check geometry state
 544     OpenGl_GUM_PREPARE, //!< collect unchanged objects
 545     OpenGl_GUM_REBUILD  //!< rebuild changed and new objects
 546   };
 547
 548   //! Defines frequently used shader variables.
 549   enum ShaderVariableIndex
 550   {
 551     OpenGl_RT_aPosition,
 552
 553     // camera position
 554     OpenGl_RT_uOriginLT,
 555     OpenGl_RT_uOriginLB,
 556     OpenGl_RT_uOriginRT,
 557     OpenGl_RT_uOriginRB,
 558     OpenGl_RT_uDirectLT,
 559     OpenGl_RT_uDirectLB,
 560     OpenGl_RT_uDirectRT,
 561     OpenGl_RT_uDirectRB,
 562     OpenGl_RT_uViewMat,
 563     OpenGl_RT_uUnviewMat,
 564
 565     // 3D scene params
 566     OpenGl_RT_uSceneRad,
 567     OpenGl_RT_uSceneEps,
 568     OpenGl_RT_uLightAmbnt,
 569     OpenGl_RT_uLightCount,
 570
 571     // background params
 572     OpenGl_RT_uBackColorTop,
 573     OpenGl_RT_uBackColorBot,
 574
 575     // ray-tracing params
 576     OpenGl_RT_uShadowsEnabled,
 577     OpenGl_RT_uReflectEnabled,
 578     OpenGl_RT_uSphereMapEnabled,
 579     OpenGl_RT_uSphereMapForBack,
 580     OpenGl_RT_uTexSamplersArray,
 581     OpenGl_RT_uBlockedRngEnabled,
 582
 583     // sampled frame params
 584     OpenGl_RT_uSampleWeight,
 585     OpenGl_RT_uFrameRndSeed,
 586
 587     // adaptive FSAA params
 588     OpenGl_RT_uOffsetX,
 589     OpenGl_RT_uOffsetY,
 590     OpenGl_RT_uSamples,
 591
 592     OpenGl_RT_NbVariables // special field
 593   };
 594
 595   //! Defines texture samplers.
 596   enum ShaderSamplerNames
 597   {
 598     OpenGl_RT_SceneNodeInfoTexture  = 0,
 599     OpenGl_RT_SceneMinPointTexture  = 1,
 600     OpenGl_RT_SceneMaxPointTexture  = 2,
 601     OpenGl_RT_SceneTransformTexture = 3,
 602
 603     OpenGl_RT_GeometryVertexTexture = 4,
 604     OpenGl_RT_GeometryNormalTexture = 5,
 605     OpenGl_RT_GeometryTexCrdTexture = 6,
 606     OpenGl_RT_GeometryTriangTexture = 7,
 607
 608     OpenGl_RT_EnvironmentMapTexture = 8,
 609
 610     OpenGl_RT_RaytraceMaterialTexture = 9,
 611     OpenGl_RT_RaytraceLightSrcTexture = 10,
 612
 613     OpenGl_RT_FsaaInputTexture = 11,
 614     OpenGl_RT_PrevAccumTexture = 12,
 615     OpenGl_RT_DepthTexture = 13,
 616
 617     OpenGl_RT_OpenGlColorTexture = 14,
 618     OpenGl_RT_OpenGlDepthTexture = 15
 619   };
 620
 621   //! Tool class for management of shader sources.
 622   class ShaderSource
 623   {
 624   public:
 625
 626     //! Default shader prefix - empty string.
 627     static const TCollection_AsciiString EMPTY_PREFIX;
 628
 629     //! Creates new uninitialized shader source.
 630     ShaderSource()
 631     {
 632       //
 633     }
 634
 635   public:
 636
 637     //! Returns error description in case of load fail.
 638     const TCollection_AsciiString& ErrorDescription() const
 639     {
 640       return myError;
 641     }
 642
 643     //! Returns prefix to insert before the source.
 644     const TCollection_AsciiString& Prefix() const
 645     {
 646       return myPrefix;
 647     }
 648
 649     //! Sets prefix to insert before the source.
 650     void SetPrefix (const TCollection_AsciiString& thePrefix)
 651     {
 652       myPrefix = thePrefix;
 653     }
 654
 655     //! Returns shader source combined with prefix.
 656     TCollection_AsciiString Source() const;
 657
 658     //! Loads shader source from specified files.
 659     Standard_Boolean Load (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
 660
 661   private:
 662
 663     TCollection_AsciiString mySource; //!< Source string of the shader object
 664     TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
 665     TCollection_AsciiString myError;  //!< error state
 666
 667   };
 668
 669   //! Default ray-tracing depth.
 670   static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
 671
 672   //! Default size of traversal stack.
 673   static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
 674
 675   //! Compile-time ray-tracing parameters.
 676   struct RaytracingParams
 677   {
 678     //! Actual size of traversal stack in shader program.
 679     Standard_Integer StackSize;
 680
 681     //! Actual ray-tracing depth (number of ray bounces).
 682     Standard_Integer NbBounces;
 683
 684     //! Enables/disables light propagation through transparent media.
 685     Standard_Boolean TransparentShadows;
 686
 687     //! Enables/disables global illumination (GI) effects.
 688     Standard_Boolean GlobalIllumination;
 689
 690     //! Enables/disables the use of OpenGL bindless textures.
 691     Standard_Boolean UseBindlessTextures;
 692
 693     //! Creates default compile-time ray-tracing parameters.
 694     RaytracingParams()
 695     : StackSize (THE_DEFAULT_STACK_SIZE),
 696       NbBounces (THE_DEFAULT_NB_BOUNCES),
 697       TransparentShadows (Standard_False),
 698       GlobalIllumination  (Standard_False),
 699       UseBindlessTextures (Standard_False)
 700     {
 701       //
 702     }
 703   };
 704
 705   //! Describes state of OpenGL structure.
 706   struct StructState
 707   {
 708     Standard_Size StructureState;
 709     Standard_Size InstancedState;
 710
 711     //! Creates new structure state.
 712     StructState (const Standard_Size theStructureState = 0,
 713                  const Standard_Size theInstancedState = 0)
 714     : StructureState (theStructureState),
 715       InstancedState (theInstancedState)
 716     {
 717       //
 718     }
 719
 720     //! Creates new structure state.
 721     StructState (const OpenGl_Structure* theStructure)
 722     {
 723       StructureState = theStructure->ModificationState();
 724
 725       InstancedState = theStructure->InstancedStructure() != NULL ?
 726         theStructure->InstancedStructure()->ModificationState() : 0;
 727     }
 728   };
 729
 730 protected: //! @name methods related to ray-tracing
 731
 732   //! Updates 3D scene geometry for ray-tracing.
 733   Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode      theMode,
 734                                            const Standard_Integer        theViewId,
 735                                            const Handle(OpenGl_Context)& theGlContext);
 736
 737   //! Updates 3D scene light sources for ray-tracing.
 738   Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
 739
 740   //! Updates environment map for ray-tracing.
 741   Standard_Boolean updateRaytraceEnvironmentMap (const Handle(OpenGl_Context)& theGlContext);
 742
 743   //! Checks to see if the OpenGL structure is modified.
 744   Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
 745
 746   //! Adds OpenGL structure to ray-traced scene geometry.
 747   Standard_Boolean addRaytraceStructure (const OpenGl_Structure*       theStructure,
 748                                          const Handle(OpenGl_Context)& theGlContext);
 749
 750   //! Adds OpenGL groups to ray-traced scene geometry.
 751   Standard_Boolean addRaytraceGroups (const OpenGl_Structure*        theStructure,
 752                                       const OpenGl_RaytraceMaterial& theStructMat,
 753                                       const Graphic3d_Mat4*          theTransform,
 754                                       const Handle(OpenGl_Context)&  theGlContext);
 755
 756   //! Creates ray-tracing material properties.
 757   OpenGl_RaytraceMaterial convertMaterial (const OpenGl_AspectFace*      theAspect,
 758                                            const Handle(OpenGl_Context)& theGlContext);
 759
 760   //! Adds OpenGL primitive array to ray-traced scene geometry.
 761   OpenGl_TriangleSet* addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
 762                                                  const Standard_Integer       theMatID,
 763                                                  const OpenGl_Mat4*           theTrans);
 764
 765   //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
 766   Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet&                  theSet,
 767                                              const Standard_Integer               theMatID,
 768                                              const Standard_Integer               theCount,
 769                                              const Standard_Integer               theOffset,
 770                                              const OpenGl_PrimitiveArray&         theArray);
 771
 772   //! Adds OpenGL triangle array to ray-traced scene geometry.
 773   Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet&                  theSet,
 774                                              const Standard_Integer               theMatID,
 775                                              const Standard_Integer               theCount,
 776                                              const Standard_Integer               theOffset,
 777                                              const Handle(Graphic3d_IndexBuffer)& theIndices);
 778
 779   //! Adds OpenGL triangle fan array to ray-traced scene geometry.
 780   Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet&                  theSet,
 781                                                 const Standard_Integer               theMatID,
 782                                                 const Standard_Integer               theCount,
 783                                                 const Standard_Integer               theOffset,
 784                                                 const Handle(Graphic3d_IndexBuffer)& theIndices);
 785
 786   //! Adds OpenGL triangle strip array to ray-traced scene geometry.
 787   Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet&                  theSet,
 788                                                   const Standard_Integer               theMatID,
 789                                                   const Standard_Integer               theCount,
 790                                                   const Standard_Integer               theOffset,
 791                                                   const Handle(Graphic3d_IndexBuffer)& theIndices);
 792
 793   //! Adds OpenGL quadrangle array to ray-traced scene geometry.
 794   Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet&                  theSet,
 795                                                const Standard_Integer               theMatID,
 796                                                const Standard_Integer               theCount,
 797                                                const Standard_Integer               theOffset,
 798                                                const Handle(Graphic3d_IndexBuffer)& theIndices);
 799
 800   //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
 801   Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet&                  theSet,
 802                                                     const Standard_Integer               theMatID,
 803                                                     const Standard_Integer               theCount,
 804                                                     const Standard_Integer               theOffset,
 805                                                     const Handle(Graphic3d_IndexBuffer)& theIndices);
 806
 807   //! Adds OpenGL polygon array to ray-traced scene geometry.
 808   Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet&                  theSet,
 809                                             const Standard_Integer               theMatID,
 810                                             const Standard_Integer               theCount,
 811                                             const Standard_Integer               theOffset,
 812                                             const Handle(Graphic3d_IndexBuffer)& theIndices);
 813
 814   //! Uploads ray-trace data to the GPU.
 815   Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
 816
 817   //! Generates shader prefix based on current ray-tracing options.
 818   TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
 819
 820   //! Performs safe exit when shaders initialization fails.
 821   Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
 822                                  const Handle(OpenGl_Context)&     theGlContext);
 823
 824   //! Loads and compiles shader object from specified source.
 825   Handle(OpenGl_ShaderObject) initShader (const GLenum                  theType,
 826                                           const ShaderSource&           theSource,
 827                                           const Handle(OpenGl_Context)& theGlContext);
 828
 829   //! Creates shader program from the given vertex and fragment shaders.
 830   Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)&      theGlContext,
 831                                             const Handle(OpenGl_ShaderObject)& theVertShader,
 832                                             const Handle(OpenGl_ShaderObject)& theFragShader);
 833
 834   //! Initializes OpenGL/GLSL shader programs.
 835   Standard_Boolean initRaytraceResources (const Handle(OpenGl_Context)& theGlContext);
 836
 837   //! Releases OpenGL/GLSL shader programs.
 838   void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext);
 839
 840   //! Updates auxiliary OpenGL frame buffers.
 841   Standard_Boolean updateRaytraceBuffers (const Standard_Integer        theSizeX,
 842                                           const Standard_Integer        theSizeY,
 843                                           const Handle(OpenGl_Context)& theGlContext);
 844
 845   //! Generates viewing rays for corners of screen quad.
 846   void updateCamera (const OpenGl_Mat4& theOrientation,
 847                      const OpenGl_Mat4& theViewMapping,
 848                      OpenGl_Vec3*       theOrigins,
 849                      OpenGl_Vec3*       theDirects,
 850                      OpenGl_Mat4&       theView,
 851                      OpenGl_Mat4&       theUnView);
 852
 853   //! Binds ray-trace textures to corresponding texture units.
 854   void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
 855
 856   //! Unbinds ray-trace textures from corresponding texture unit.
 857   void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
 858
 859   //! Sets uniform state for the given ray-tracing shader program.
 860   Standard_Boolean setUniformState (const OpenGl_Vec3*            theOrigins,
 861                                     const OpenGl_Vec3*            theDirects,
 862                                     const OpenGl_Mat4&            theViewMat,
 863                                     const OpenGl_Mat4&            theUnviewMat,
 864                                     const Standard_Integer        theProgramId,
 865                                     const Handle(OpenGl_Context)& theGlContext);
 866
 867   //! Runs ray-tracing shader programs.
 868   Standard_Boolean runRaytraceShaders (const Standard_Integer        theSizeX,
 869                                        const Standard_Integer        theSizeY,
 870                                        const OpenGl_Vec3*            theOrigins,
 871                                        const OpenGl_Vec3*            theDirects,
 872                                        const OpenGl_Mat4&            theViewMat,
 873                                        const OpenGl_Mat4&            theUnviewMat,
 874                                        Graphic3d_Camera::Projection  theProjection,
 875                                        OpenGl_FrameBuffer*           theReadDrawFbo,
 876                                        const Handle(OpenGl_Context)& theGlContext);
 877
 878   //! Redraws the window using OpenGL/GLSL ray-tracing.
 879   Standard_Boolean raytrace (const Standard_Integer        theSizeX,
 880                              const Standard_Integer        theSizeY,
 881                              Graphic3d_Camera::Projection  theProjection,
 882                              OpenGl_FrameBuffer*           theReadDrawFbo,
 883                              const Handle(OpenGl_Context)& theGlContext);
 884
 885 protected: //! @name fields related to ray-tracing
 886
 887   //! Result of shaders initialization.
 888   RaytraceInitStatus myRaytraceInitStatus;
 889
 890   //! Is geometry data valid?
 891   Standard_Boolean myIsRaytraceDataValid;
 892
 893   //! Warning about missing extension GL_ARB_bindless_texture has been displayed?
 894   Standard_Boolean myIsRaytraceWarnTextures;
 895
 896   //! 3D scene geometry data for ray-tracing.
 897   OpenGl_RaytraceGeometry myRaytraceGeometry;
 898
 899   //! Compile-time ray-tracing parameters.
 900   RaytracingParams myRaytraceParameters;
 901
 902   //! Radius of bounding sphere of the scene.
 903   Standard_ShortReal myRaytraceSceneRadius;
 904   //! Scene epsilon to prevent self-intersections.
 905   Standard_ShortReal myRaytraceSceneEpsilon;
 906
 907   //! OpenGL/GLSL source of ray-tracing fragment shader.
 908   ShaderSource myRaytraceShaderSource;
 909   //! OpenGL/GLSL source of adaptive-AA fragment shader.
 910   ShaderSource myPostFSAAShaderSource;
 911
 912   //! OpenGL/GLSL ray-tracing fragment shader.
 913   Handle(OpenGl_ShaderObject) myRaytraceShader;
 914   //! OpenGL/GLSL adaptive-AA fragment shader.
 915   Handle(OpenGl_ShaderObject) myPostFSAAShader;
 916
 917   //! OpenGL/GLSL ray-tracing shader program.
 918   Handle(OpenGl_ShaderProgram) myRaytraceProgram;
 919   //! OpenGL/GLSL adaptive-AA shader program.
 920   Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
 921   //! OpenGL/GLSL program for displaying texture.
 922   Handle(OpenGl_ShaderProgram) myOutImageProgram;
 923
 924   //! Texture buffer of data records of bottom-level BVH nodes.
 925   Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
 926   //! Texture buffer of minimum points of bottom-level BVH nodes.
 927   Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
 928   //! Texture buffer of maximum points of bottom-level BVH nodes.
 929   Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
 930   //! Texture buffer of transformations of high-level BVH nodes.
 931   Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
 932
 933   //! Texture buffer of vertex coords.
 934   Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
 935   //! Texture buffer of vertex normals.
 936   Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
 937   //! Texture buffer of vertex UV coords.
 938   Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
 939   //! Texture buffer of triangle indices.
 940   Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
 941
 942   //! Texture buffer of material properties.
 943   Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
 944   //! Texture buffer of light source properties.
 945   Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
 946
 947   //! 1st framebuffer (FBO) to perform adaptive FSAA.
 948   Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
 949   //! 2nd framebuffer (FBO) to perform adaptive FSAA.
 950   Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
 951   //! Framebuffer (FBO) for preliminary OpenGL output.
 952   Handle(OpenGl_FrameBuffer) myOpenGlFBO;
 953   Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
 954
 955   //! Vertex buffer (VBO) for drawing dummy quad.
 956   OpenGl_VertexBuffer myRaytraceScreenQuad;
 957
 958   //! Cached locations of frequently used uniform variables.
 959   Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
 960
 961   //! State of OpenGL structures reflected to ray-tracing.
 962   std::map<const OpenGl_Structure*, StructState> myStructureStates;
 963
 964   //! PrimitiveArray to TriangleSet map for scene partial update.
 965   std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
 966
 967   //! Set of IDs of non-raytracable elements (to detect updates).
 968   std::set<Standard_Integer> myNonRaytraceStructureIDs;
 969
 970   //! Render filter to filter out all raytracable structures.
 971   Handle(OpenGl_RaytraceFilter) myRaytraceFilter;
 972
 973   //! Marks if environment map should be updated.
 974   Standard_Boolean myToUpdateEnvironmentMap;
 975
 976   //! State of OpenGL layer list.
 977   Standard_Size myLayerListState;
 978
 979   //! Number of accumulated frames (for progressive rendering).
 980   Standard_Integer myAccumFrames;
 981
 982   //! Stored ray origins used for detection of camera movements.
 983   OpenGl_Vec3 myPreviousOrigins[3];
 984
 985   //! Bullard RNG to produce random sequence.
 986   math_BullardGenerator myRNG;
 987
 988 public:
 989
 990   DEFINE_STANDARD_ALLOC
 991   DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
 992
 993   friend class OpenGl_GraphicDriver;
 994   friend class OpenGl_Workspace;
 995 };
 996
 997 #endif // _OpenGl_View_Header