0027750: Visualization, V3d_View - remove unused functionality ZClipping and ZCueing
[occt.git] / 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   //! Print the contents of the view to the printer.
171   //! @param thePrinterDC        pass the PrinterDeviceContext (HDC)
172   //! @param theToShowBackground when set to FALSE then print the view without background
173   //!                            color (background is white) else set to TRUE for printing
174   //!                            with current background color
175   //! @param theFileName         if != NULL, then the view will be printed to a file
176   //! @param thePrintAlgorithm   select print algorithm: stretch, tile
177   //! @param theScaleFactor      scaling coefficient, used internally to scale the printings
178   //!                            accordingly to the scale factor selected in the printer properties dialog
179   //! @return Standard_True if the data is passed to the printer, otherwise Standard_False if
180   //! the print operation failed due to the printer errors, or lack of system memory. This might be related
181   //! to insufficient memory or some internal errors.
182   //! All this errors are indicated by the message boxes (on level of OpenGl_GraphicDriver).
183   //! Warning: This function can reuse FBO assigned to the view, please take it into account
184   //! if you use it for your purposes.
185   Standard_EXPORT virtual Standard_Boolean Print (const Aspect_Handle    thePrinterDC,
186                                                   const Standard_Boolean theToShowBackground,
187                                                   const Standard_CString theFileName,
188                                                   const Aspect_PrintAlgo thePrintAlgorithm = Aspect_PA_STRETCH,
189                                                   const Standard_Real    theScaleFactor = 1.0) Standard_OVERRIDE;
190
191   //! Export scene into the one of the Vector graphics formats (SVG, PS, PDF...).
192   //! In contrast to Bitmaps, Vector graphics is scalable (so you may got quality benefits
193   //! on printing to laser printer). Notice however that results may differ a lot and
194   //! do not contain some elements.
195   Standard_EXPORT virtual Standard_Boolean Export (const Standard_CString theFileName,
196                                                    const Graphic3d_ExportFormat theFormat,
197                                                    const Graphic3d_SortType theSortType = Graphic3d_ST_BSP_Tree) Standard_OVERRIDE;
198
199   //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
200   Standard_EXPORT virtual void InvalidateBVHData (const Standard_Integer theLayerId) Standard_OVERRIDE;
201
202   //! Insert a new top-level z layer with the given ID.
203   Standard_EXPORT virtual void AddZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
204
205   //! Remove a z layer with the given ID.
206   Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
207
208   //! Sets the settings for a single Z layer of specified view.
209   Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
210                                                   const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
211
212   //! Returns the maximum Z layer ID.
213   //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
214   Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
215
216   //! Returns the bounding box of all structures displayed in the Z layer.
217   //! Never fails. If Z layer does not exist nothing happens.
218   Standard_EXPORT virtual void InvalidateZLayerBoundingBox (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
219
220   //! Returns the bounding box of all structures displayed in the Z layer.
221   //! Never fails. If Z layer does not exist the empty box is returned.
222   Standard_EXPORT virtual Graphic3d_BndBox4f ZLayerBoundingBox (const Graphic3d_ZLayerId        theLayerId,
223                                                                 const Handle(Graphic3d_Camera)& theCamera,
224                                                                 const Standard_Integer          theWindowWidth,
225                                                                 const Standard_Integer          theWindowHeight,
226                                                                 const Standard_Boolean          theToIgnoreInfiniteFlag) const Standard_OVERRIDE;
227
228   //! Returns pointer to an assigned framebuffer object.
229   Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
230
231   //! Sets framebuffer object for offscreen rendering.
232   Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
233
234   //! Generate offscreen FBO in the graphic library.
235   //! If not supported on hardware returns NULL.
236   Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
237                                                                 const Standard_Integer theHeight) Standard_OVERRIDE;
238
239   //! Remove offscreen FBO from the graphic library
240   Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
241
242   //! Read offscreen FBO configuration.
243   Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
244                                                  Standard_Integer& theWidth,
245                                                  Standard_Integer& theHeight,
246                                                  Standard_Integer& theWidthMax,
247                                                  Standard_Integer& theHeightMax) Standard_OVERRIDE;
248
249   //! Change offscreen FBO viewport.
250   Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
251                                                   const Standard_Integer theWidth,
252                                                   const Standard_Integer theHeight) Standard_OVERRIDE;
253
254 public:
255
256   //! Returns background  fill color.
257   Standard_EXPORT virtual Aspect_Background Background() const Standard_OVERRIDE;
258
259   //! Sets background fill color.
260   Standard_EXPORT virtual void SetBackground (const Aspect_Background& theBackground) Standard_OVERRIDE;
261
262   //! Returns gradient background fill colors.
263   Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
264
265   //! Sets gradient background fill colors.
266   Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
267
268   //! Returns background image texture file path.
269   Standard_EXPORT virtual TCollection_AsciiString BackgroundImage() Standard_OVERRIDE { return myBackgroundImagePath; }
270
271   //! Sets background image texture file path.
272   Standard_EXPORT virtual void SetBackgroundImage (const TCollection_AsciiString& theFilePath) Standard_OVERRIDE;
273
274   //! Returns background image fill style.
275   Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
276
277   //! Sets background image fill style.
278   Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
279
280   //! Returns environment texture set for the view.
281   Standard_EXPORT virtual Handle(Graphic3d_TextureEnv) TextureEnv() const Standard_OVERRIDE { return myTextureEnvData; }
282
283   //! Sets environment texture for the view.
284   Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
285
286   //! Returns the state of frustum culling optimization.
287   virtual Standard_Boolean IsCullingEnabled() const Standard_OVERRIDE { return myCulling; }
288
289   //! Enables or disables frustum culling optimization.
290   virtual void SetCullingEnabled (const Standard_Boolean theIsEnabled) Standard_OVERRIDE { myCulling = theIsEnabled; }
291
292   //! Returns shading model of the view.
293   virtual Graphic3d_TypeOfShadingModel ShadingModel() const Standard_OVERRIDE { return myShadingModel; }
294
295   //! Sets shading model of the view.
296   virtual void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel) Standard_OVERRIDE { myShadingModel = theModel; }
297
298   //! Return backfacing model used for the view.
299   virtual Graphic3d_TypeOfBackfacingModel BackfacingModel() const Standard_OVERRIDE { return myBackfacing; }
300
301   //! Sets backfacing model for the view.
302   virtual void SetBackfacingModel (const Graphic3d_TypeOfBackfacingModel theModel) Standard_OVERRIDE { myBackfacing = theModel; }
303
304   //! Returns camera object of the view.
305   virtual const Handle(Graphic3d_Camera)& Camera() const Standard_OVERRIDE { return myCamera; }
306
307   //! Sets camera used by the view.
308   virtual void SetCamera (const Handle(Graphic3d_Camera)& theCamera) Standard_OVERRIDE { myCamera = theCamera; }
309
310   //! Returns true if GL lighting is enabled.
311   virtual Standard_Boolean IsGLLightEnabled() const Standard_OVERRIDE { return myUseGLLight; }
312
313   //! Sets GL lighting enabled or disable state.
314   virtual void SetGLLightEnabled (const Standard_Boolean theIsEnabled) Standard_OVERRIDE { myUseGLLight = theIsEnabled; }
315
316   //! Returns list of lights of the view.
317   virtual const Graphic3d_ListOfCLight& Lights() const Standard_OVERRIDE { return myLights; }
318
319   //! Sets list of lights for the view.
320   virtual void SetLights (const Graphic3d_ListOfCLight& theLights) Standard_OVERRIDE
321   {
322     myLights = theLights;
323     myCurrLightSourceState = myStateCounter->Increment();
324   }
325
326   //! Returns list of clip planes set for the view.
327   virtual const Graphic3d_SequenceOfHClipPlane& ClipPlanes() const Standard_OVERRIDE { return myClipPlanes; }
328
329   //! Sets list of clip planes for the view.
330   virtual void SetClipPlanes (const Graphic3d_SequenceOfHClipPlane& thePlanes) Standard_OVERRIDE { myClipPlanes = thePlanes; }
331
332 public:
333
334   //! Returns background color.
335   const Quantity_ColorRGBA& BackgroundColor() const { return myBgColor; }
336
337   //! Change trihedron.
338   OpenGl_Trihedron& ChangeTrihedron() { return myTrihedron; }
339
340   //! Change graduated trihedron.
341   OpenGl_GraduatedTrihedron& ChangeGraduatedTrihedron() { return myGraduatedTrihedron; }
342
343   void SetTextureEnv (const Handle(OpenGl_Context)&       theCtx,
344                       const Handle(Graphic3d_TextureEnv)& theTexture);
345
346   void SetBackgroundTextureStyle (const Aspect_FillMethod FillStyle);
347
348   void SetBackgroundGradient (const Quantity_Color& AColor1, const Quantity_Color& AColor2, const Aspect_GradientFillMethod AType);
349
350   void SetBackgroundGradientType (const Aspect_GradientFillMethod AType);
351
352   //! Returns list of OpenGL Z-layers.
353   const OpenGl_LayerList& LayerList() const { return myZLayers; }
354
355   //! Returns list of openGL light sources.
356   const OpenGl_ListOfLight& LightList() const { return myLights; }
357
358   //! Returns OpenGL window implementation.
359   const Handle(OpenGl_Window) GlWindow() const { return myWindow; }
360
361   //! Returns OpenGL environment map.
362   const Handle(OpenGl_Texture)& GlTextureEnv() const { return myTextureEnv; }
363
364   //! Returns selector for BVH tree, providing a possibility to store information
365   //! about current view volume and to detect which objects are overlapping it.
366   OpenGl_BVHTreeSelector& BVHTreeSelector() { return myBVHSelector; }
367
368   //! Returns true if there are immediate structures to display
369   bool HasImmediateStructures() const
370   {
371     return myZLayers.NbImmediateStructures() != 0;
372   }
373
374 protected: //! @name Internal methods for managing GL resources
375
376   //! Initializes OpenGl resource for environment texture.
377   void initTextureEnv (const Handle(OpenGl_Context)& theContext);
378
379 protected: //! @name low-level redrawing sub-routines
380
381   //! Redraws view for the given monographic camera projection, or left/right eye.
382   Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
383                                        OpenGl_FrameBuffer*                theReadDrawFbo);
384
385   //! Redraws view for the given monographic camera projection, or left/right eye.
386   //!
387   //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
388   //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
389   //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
390   //! and redraw immediate structures on top.
391   //!
392   //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
393   //! the first step (blitting) will be skipped.
394   //!
395   //! @return false if immediate structures has been rendered directly into FrontBuffer
396   //! and Buffer Swap should not be called.
397   Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
398                                                 OpenGl_FrameBuffer* theReadFbo,
399                                                 OpenGl_FrameBuffer* theDrawFbo,
400                                                 const Standard_Boolean theIsPartialUpdate = Standard_False);
401
402   //! Blit image from/to specified buffers.
403   Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer*    theReadFbo,
404                                     OpenGl_FrameBuffer*    theDrawFbo,
405                                     const Standard_Boolean theToFlip = Standard_False);
406
407   //! Setup default FBO.
408   Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
409
410 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
411
412   //! Renders the graphical contents of the view into the preprepared window or framebuffer.
413   //! @param theProjection [in] the projection that should be used for rendering.
414   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
415   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
416   Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
417                                        OpenGl_FrameBuffer*          theReadDrawFbo,
418                                        const Standard_Boolean       theToDrawImmediate);
419
420   //! Renders the graphical scene.
421   //! @param theProjection [in] the projection that is used for rendering.
422   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
423   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
424   Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
425                                             OpenGl_FrameBuffer*    theReadDrawFbo,
426                                             const Standard_Boolean theToDrawImmediate);
427
428   //! Draw background (gradient / image)
429   Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace);
430
431   //! Render set of structures presented in the view.
432   //! @param theProjection [in] the projection that is used for rendering.
433   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
434   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
435   Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
436                                               OpenGl_FrameBuffer*    theReadDrawFbo,
437                                               const Standard_Boolean theToDrawImmediate);
438
439   //! Renders trihedron.
440   void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
441
442 private:
443
444   //! Adds the structure to display lists of the view.
445   Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
446                                                  const Standard_Integer thePriority) Standard_OVERRIDE;
447
448   //! Erases the structure from display lists of the view.
449   Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
450
451   //! Change Z layer of a structure already presented in view.
452   Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
453                                              const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
454
455   //! Changes the priority of a structure within its Z layer in the specified view.
456   Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
457                                                const Standard_Integer theNewPriority) Standard_OVERRIDE;
458
459   //! Returns zoom-scale factor.
460   Standard_EXPORT virtual Standard_Real considerZoomPersistenceObjects (const Graphic3d_ZLayerId        theLayerId,
461                                                                         const Handle(Graphic3d_Camera)& theCamera,
462                                                                         const Standard_Integer          theWindowWidth,
463                                                                         const Standard_Integer          theWindowHeight,
464                                                                         const Standard_Boolean          theToIgnoreInfiniteFlag) const Standard_OVERRIDE;
465
466 private:
467
468   //! Copy content of Back buffer to the Front buffer.
469   void copyBackToFront();
470
471   //! Initialize blit quad.
472   OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
473
474   //! Blend together views pair into stereo image.
475   void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
476
477 protected:
478
479   OpenGl_GraphicDriver*    myDriver;
480   Handle(OpenGl_Window)    myWindow;
481   Handle(OpenGl_Workspace) myWorkspace;
482   Handle(OpenGl_Caps)      myCaps;
483   Standard_Boolean&        myDeviceLostFlag;
484   Standard_Boolean         myWasRedrawnGL;
485
486   Standard_Boolean                myCulling;
487   Graphic3d_TypeOfShadingModel    myShadingModel;
488   Graphic3d_TypeOfBackfacingModel myBackfacing;
489   Quantity_ColorRGBA              myBgColor;
490   Graphic3d_SequenceOfHClipPlane  myClipPlanes;
491   Handle(Graphic3d_Camera)        myCamera;
492   Handle(OpenGl_FrameBuffer)      myFBO;
493   Standard_Boolean                myUseGLLight;
494   Standard_Boolean                myToShowTrihedron;
495   Standard_Boolean                myToShowGradTrihedron;
496   TCollection_AsciiString         myBackgroundImagePath;
497   Handle(Graphic3d_TextureEnv)    myTextureEnvData;
498   Graphic3d_GraduatedTrihedron    myGTrihedronData;
499
500   OpenGl_ListOfLight              myNoShadingLight;
501   OpenGl_ListOfLight              myLights;
502   OpenGl_LayerList                myZLayers; //!< main list of displayed structure, sorted by layers
503
504   Graphic3d_WorldViewProjState    myWorldViewProjState; //!< camera modification state
505   OpenGl_StateCounter*            myStateCounter;
506   Standard_Size                   myCurrLightSourceState;
507
508   typedef std::pair<Standard_Size, Standard_Size> StateInfo;
509
510   StateInfo myLastOrientationState;
511   StateInfo myLastViewMappingState;
512   StateInfo myLastLightSourceState;
513
514   //! Is needed for selection of overlapping objects and storage of the current view volume
515   OpenGl_BVHTreeSelector myBVHSelector;
516
517   OpenGl_Trihedron          myTrihedron;
518   OpenGl_GraduatedTrihedron myGraduatedTrihedron;
519
520   Handle(OpenGl_Texture) myTextureEnv;
521
522 protected: //! @name Rendering properties
523
524   //! Two framebuffers (left and right views) store cached main presentation
525   //! of the view (without presentation of immediate layers).
526   GLint                      myFboColorFormat;        //!< sized format for color attachments
527   GLint                      myFboDepthFormat;        //!< sized format for depth-stencil attachments
528   Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
529   Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2]; //!< Additional buffers for immediate layer in stereo mode.
530   OpenGl_VertexBuffer        myFullScreenQuad;        //!< Vertices for full-screen quad rendering.
531   OpenGl_VertexBuffer        myFullScreenQuadFlip;
532   Standard_Boolean           myToFlipOutput;          //!< Flag to draw result image upside-down
533   unsigned int               myFrameCounter;          //!< redraw counter, for debugging
534   Standard_Boolean           myHasFboBlit;            //!< disable FBOs on failure
535   Standard_Boolean           myToDisableMSAA;         //!< disable MSAA after failure
536   Standard_Boolean           myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
537   Standard_Boolean           myBackBufferRestored;
538   Standard_Boolean           myIsImmediateDrawn;     //!< flag indicates that immediate mode buffer contains some data
539
540 protected: //! @name Background parameters
541
542   OpenGl_AspectFace*      myTextureParams;   //!< Stores texture and its parameters for textured background
543   OpenGl_BackgroundArray* myBgGradientArray; //!< Primitive array for gradient background
544   OpenGl_BackgroundArray* myBgTextureArray;  //!< Primitive array for texture  background
545
546 protected: //! @name data types related to ray-tracing
547
548   //! Result of OpenGL shaders initialization.
549   enum RaytraceInitStatus
550   {
551     OpenGl_RT_NONE,
552     OpenGl_RT_INIT,
553     OpenGl_RT_FAIL
554   };
555
556   //! Describes update mode (state).
557   enum RaytraceUpdateMode
558   {
559     OpenGl_GUM_CHECK,   //!< check geometry state
560     OpenGl_GUM_PREPARE, //!< collect unchanged objects
561     OpenGl_GUM_REBUILD  //!< rebuild changed and new objects
562   };
563
564   //! Defines frequently used shader variables.
565   enum ShaderVariableIndex
566   {
567     OpenGl_RT_aPosition,
568
569     // camera position
570     OpenGl_RT_uOriginLT,
571     OpenGl_RT_uOriginLB,
572     OpenGl_RT_uOriginRT,
573     OpenGl_RT_uOriginRB,
574     OpenGl_RT_uDirectLT,
575     OpenGl_RT_uDirectLB,
576     OpenGl_RT_uDirectRT,
577     OpenGl_RT_uDirectRB,
578     OpenGl_RT_uViewMat,
579     OpenGl_RT_uUnviewMat,
580
581     // 3D scene params
582     OpenGl_RT_uSceneRad,
583     OpenGl_RT_uSceneEps,
584     OpenGl_RT_uLightAmbnt,
585     OpenGl_RT_uLightCount,
586
587     // background params
588     OpenGl_RT_uBackColorTop,
589     OpenGl_RT_uBackColorBot,
590
591     // ray-tracing params
592     OpenGl_RT_uShadowsEnabled,
593     OpenGl_RT_uReflectEnabled,
594     OpenGl_RT_uSphereMapEnabled,
595     OpenGl_RT_uSphereMapForBack,
596     OpenGl_RT_uTexSamplersArray,
597     OpenGl_RT_uBlockedRngEnabled,
598
599     // sampled frame params
600     OpenGl_RT_uSampleWeight,
601     OpenGl_RT_uFrameRndSeed,
602
603     // adaptive FSAA params
604     OpenGl_RT_uOffsetX,
605     OpenGl_RT_uOffsetY,
606     OpenGl_RT_uSamples,
607
608     OpenGl_RT_NbVariables // special field
609   };
610
611   //! Defines texture samplers.
612   enum ShaderSamplerNames
613   {
614     OpenGl_RT_SceneNodeInfoTexture  = 0,
615     OpenGl_RT_SceneMinPointTexture  = 1,
616     OpenGl_RT_SceneMaxPointTexture  = 2,
617     OpenGl_RT_SceneTransformTexture = 3,
618
619     OpenGl_RT_GeometryVertexTexture = 4,
620     OpenGl_RT_GeometryNormalTexture = 5,
621     OpenGl_RT_GeometryTexCrdTexture = 6,
622     OpenGl_RT_GeometryTriangTexture = 7,
623
624     OpenGl_RT_EnvironmentMapTexture = 8,
625
626     OpenGl_RT_RaytraceMaterialTexture = 9,
627     OpenGl_RT_RaytraceLightSrcTexture = 10,
628
629     OpenGl_RT_FsaaInputTexture = 11,
630     OpenGl_RT_PrevAccumTexture = 12,
631     OpenGl_RT_DepthTexture = 13,
632
633     OpenGl_RT_OpenGlColorTexture = 14,
634     OpenGl_RT_OpenGlDepthTexture = 15
635   };
636
637   //! Tool class for management of shader sources.
638   class ShaderSource
639   {
640   public:
641
642     //! Default shader prefix - empty string.
643     static const TCollection_AsciiString EMPTY_PREFIX;
644
645     //! Creates new uninitialized shader source.
646     ShaderSource()
647     {
648       //
649     }
650
651   public:
652
653     //! Returns error description in case of load fail.
654     const TCollection_AsciiString& ErrorDescription() const
655     {
656       return myError;
657     }
658
659     //! Returns prefix to insert before the source.
660     const TCollection_AsciiString& Prefix() const
661     {
662       return myPrefix;
663     }
664
665     //! Sets prefix to insert before the source.
666     void SetPrefix (const TCollection_AsciiString& thePrefix)
667     {
668       myPrefix = thePrefix;
669     }
670
671     //! Returns shader source combined with prefix.
672     TCollection_AsciiString Source() const;
673
674     //! Loads shader source from specified files.
675     Standard_Boolean Load (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
676
677   private:
678
679     TCollection_AsciiString mySource; //!< Source string of the shader object
680     TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
681     TCollection_AsciiString myError;  //!< error state
682
683   };
684
685   //! Default ray-tracing depth.
686   static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
687
688   //! Default size of traversal stack.
689   static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
690
691   //! Compile-time ray-tracing parameters.
692   struct RaytracingParams
693   {
694     //! Actual size of traversal stack in shader program.
695     Standard_Integer StackSize;
696
697     //! Actual ray-tracing depth (number of ray bounces).
698     Standard_Integer NbBounces;
699
700     //! Enables/disables light propagation through transparent media.
701     Standard_Boolean TransparentShadows;
702
703     //! Enables/disables global illumination (GI) effects.
704     Standard_Boolean GlobalIllumination;
705
706     //! Enables/disables the use of OpenGL bindless textures.
707     Standard_Boolean UseBindlessTextures;
708
709     //! Creates default compile-time ray-tracing parameters.
710     RaytracingParams()
711     : StackSize (THE_DEFAULT_STACK_SIZE),
712       NbBounces (THE_DEFAULT_NB_BOUNCES),
713       TransparentShadows (Standard_False),
714       GlobalIllumination  (Standard_False),
715       UseBindlessTextures (Standard_False)
716     {
717       //
718     }
719   };
720
721   //! Describes state of OpenGL structure.
722   struct StructState
723   {
724     Standard_Size StructureState;
725     Standard_Size InstancedState;
726
727     //! Creates new structure state.
728     StructState (const Standard_Size theStructureState = 0,
729                  const Standard_Size theInstancedState = 0)
730     : StructureState (theStructureState),
731       InstancedState (theInstancedState)
732     {
733       //
734     }
735
736     //! Creates new structure state.
737     StructState (const OpenGl_Structure* theStructure)
738     {
739       StructureState = theStructure->ModificationState();
740
741       InstancedState = theStructure->InstancedStructure() != NULL ?
742         theStructure->InstancedStructure()->ModificationState() : 0;
743     }
744   };
745
746 protected: //! @name methods related to ray-tracing
747
748   //! Updates 3D scene geometry for ray-tracing.
749   Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode      theMode,
750                                            const Standard_Integer        theViewId,
751                                            const Handle(OpenGl_Context)& theGlContext);
752
753   //! Updates 3D scene light sources for ray-tracing.
754   Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
755
756   //! Updates environment map for ray-tracing.
757   Standard_Boolean updateRaytraceEnvironmentMap (const Handle(OpenGl_Context)& theGlContext);
758
759   //! Checks to see if the OpenGL structure is modified.
760   Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
761
762   //! Adds OpenGL structure to ray-traced scene geometry.
763   Standard_Boolean addRaytraceStructure (const OpenGl_Structure*       theStructure,
764                                          const Handle(OpenGl_Context)& theGlContext);
765
766   //! Adds OpenGL groups to ray-traced scene geometry.
767   Standard_Boolean addRaytraceGroups (const OpenGl_Structure*        theStructure,
768                                       const OpenGl_RaytraceMaterial& theStructMat,
769                                       const Graphic3d_Mat4*          theTransform,
770                                       const Handle(OpenGl_Context)&  theGlContext);
771
772   //! Creates ray-tracing material properties.
773   OpenGl_RaytraceMaterial convertMaterial (const OpenGl_AspectFace*      theAspect,
774                                            const Handle(OpenGl_Context)& theGlContext);
775
776   //! Adds OpenGL primitive array to ray-traced scene geometry.
777   OpenGl_TriangleSet* addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
778                                                  const Standard_Integer       theMatID,
779                                                  const OpenGl_Mat4*           theTrans);
780
781   //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
782   Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet&                  theSet,
783                                              const Standard_Integer               theMatID,
784                                              const Standard_Integer               theCount,
785                                              const Standard_Integer               theOffset,
786                                              const OpenGl_PrimitiveArray&         theArray);
787
788   //! Adds OpenGL triangle array to ray-traced scene geometry.
789   Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet&                  theSet,
790                                              const Standard_Integer               theMatID,
791                                              const Standard_Integer               theCount,
792                                              const Standard_Integer               theOffset,
793                                              const Handle(Graphic3d_IndexBuffer)& theIndices);
794
795   //! Adds OpenGL triangle fan array to ray-traced scene geometry.
796   Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet&                  theSet,
797                                                 const Standard_Integer               theMatID,
798                                                 const Standard_Integer               theCount,
799                                                 const Standard_Integer               theOffset,
800                                                 const Handle(Graphic3d_IndexBuffer)& theIndices);
801
802   //! Adds OpenGL triangle strip array to ray-traced scene geometry.
803   Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet&                  theSet,
804                                                   const Standard_Integer               theMatID,
805                                                   const Standard_Integer               theCount,
806                                                   const Standard_Integer               theOffset,
807                                                   const Handle(Graphic3d_IndexBuffer)& theIndices);
808
809   //! Adds OpenGL quadrangle array to ray-traced scene geometry.
810   Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet&                  theSet,
811                                                const Standard_Integer               theMatID,
812                                                const Standard_Integer               theCount,
813                                                const Standard_Integer               theOffset,
814                                                const Handle(Graphic3d_IndexBuffer)& theIndices);
815
816   //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
817   Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet&                  theSet,
818                                                     const Standard_Integer               theMatID,
819                                                     const Standard_Integer               theCount,
820                                                     const Standard_Integer               theOffset,
821                                                     const Handle(Graphic3d_IndexBuffer)& theIndices);
822
823   //! Adds OpenGL polygon array to ray-traced scene geometry.
824   Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet&                  theSet,
825                                             const Standard_Integer               theMatID,
826                                             const Standard_Integer               theCount,
827                                             const Standard_Integer               theOffset,
828                                             const Handle(Graphic3d_IndexBuffer)& theIndices);
829
830   //! Uploads ray-trace data to the GPU.
831   Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
832
833   //! Generates shader prefix based on current ray-tracing options.
834   TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
835
836   //! Performs safe exit when shaders initialization fails.
837   Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
838                                  const Handle(OpenGl_Context)&     theGlContext);
839
840   //! Loads and compiles shader object from specified source.
841   Handle(OpenGl_ShaderObject) initShader (const GLenum                  theType,
842                                           const ShaderSource&           theSource,
843                                           const Handle(OpenGl_Context)& theGlContext);
844
845   //! Creates shader program from the given vertex and fragment shaders.
846   Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)&      theGlContext,
847                                             const Handle(OpenGl_ShaderObject)& theVertShader,
848                                             const Handle(OpenGl_ShaderObject)& theFragShader);
849
850   //! Initializes OpenGL/GLSL shader programs.
851   Standard_Boolean initRaytraceResources (const Handle(OpenGl_Context)& theGlContext);
852
853   //! Releases OpenGL/GLSL shader programs.
854   void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext);
855
856   //! Updates auxiliary OpenGL frame buffers.
857   Standard_Boolean updateRaytraceBuffers (const Standard_Integer        theSizeX,
858                                           const Standard_Integer        theSizeY,
859                                           const Handle(OpenGl_Context)& theGlContext);
860
861   //! Generates viewing rays for corners of screen quad.
862   void updateCamera (const OpenGl_Mat4& theOrientation,
863                      const OpenGl_Mat4& theViewMapping,
864                      OpenGl_Vec3*       theOrigins,
865                      OpenGl_Vec3*       theDirects,
866                      OpenGl_Mat4&       theView,
867                      OpenGl_Mat4&       theUnView);
868
869   //! Binds ray-trace textures to corresponding texture units.
870   void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
871
872   //! Unbinds ray-trace textures from corresponding texture unit.
873   void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
874
875   //! Sets uniform state for the given ray-tracing shader program.
876   Standard_Boolean setUniformState (const OpenGl_Vec3*            theOrigins,
877                                     const OpenGl_Vec3*            theDirects,
878                                     const OpenGl_Mat4&            theViewMat,
879                                     const OpenGl_Mat4&            theUnviewMat,
880                                     const Standard_Integer        theProgramId,
881                                     const Handle(OpenGl_Context)& theGlContext);
882
883   //! Runs ray-tracing shader programs.
884   Standard_Boolean runRaytraceShaders (const Standard_Integer        theSizeX,
885                                        const Standard_Integer        theSizeY,
886                                        const OpenGl_Vec3*            theOrigins,
887                                        const OpenGl_Vec3*            theDirects,
888                                        const OpenGl_Mat4&            theViewMat,
889                                        const OpenGl_Mat4&            theUnviewMat,
890                                        Graphic3d_Camera::Projection  theProjection,
891                                        OpenGl_FrameBuffer*           theReadDrawFbo,
892                                        const Handle(OpenGl_Context)& theGlContext);
893
894   //! Redraws the window using OpenGL/GLSL ray-tracing.
895   Standard_Boolean raytrace (const Standard_Integer        theSizeX,
896                              const Standard_Integer        theSizeY,
897                              Graphic3d_Camera::Projection  theProjection,
898                              OpenGl_FrameBuffer*           theReadDrawFbo,
899                              const Handle(OpenGl_Context)& theGlContext);
900
901 protected: //! @name fields related to ray-tracing
902
903   //! Result of shaders initialization.
904   RaytraceInitStatus myRaytraceInitStatus;
905
906   //! Is geometry data valid?
907   Standard_Boolean myIsRaytraceDataValid;
908
909   //! Warning about missing extension GL_ARB_bindless_texture has been displayed?
910   Standard_Boolean myIsRaytraceWarnTextures;
911
912   //! 3D scene geometry data for ray-tracing.
913   OpenGl_RaytraceGeometry myRaytraceGeometry;
914
915   //! Compile-time ray-tracing parameters.
916   RaytracingParams myRaytraceParameters;
917
918   //! Radius of bounding sphere of the scene.
919   Standard_ShortReal myRaytraceSceneRadius;
920   //! Scene epsilon to prevent self-intersections.
921   Standard_ShortReal myRaytraceSceneEpsilon;
922
923   //! OpenGL/GLSL source of ray-tracing fragment shader.
924   ShaderSource myRaytraceShaderSource;
925   //! OpenGL/GLSL source of adaptive-AA fragment shader.
926   ShaderSource myPostFSAAShaderSource;
927
928   //! OpenGL/GLSL ray-tracing fragment shader.
929   Handle(OpenGl_ShaderObject) myRaytraceShader;
930   //! OpenGL/GLSL adaptive-AA fragment shader.
931   Handle(OpenGl_ShaderObject) myPostFSAAShader;
932
933   //! OpenGL/GLSL ray-tracing shader program.
934   Handle(OpenGl_ShaderProgram) myRaytraceProgram;
935   //! OpenGL/GLSL adaptive-AA shader program.
936   Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
937   //! OpenGL/GLSL program for displaying texture.
938   Handle(OpenGl_ShaderProgram) myOutImageProgram;
939
940   //! Texture buffer of data records of bottom-level BVH nodes.
941   Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
942   //! Texture buffer of minimum points of bottom-level BVH nodes.
943   Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
944   //! Texture buffer of maximum points of bottom-level BVH nodes.
945   Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
946   //! Texture buffer of transformations of high-level BVH nodes.
947   Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
948
949   //! Texture buffer of vertex coords.
950   Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
951   //! Texture buffer of vertex normals.
952   Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
953   //! Texture buffer of vertex UV coords.
954   Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
955   //! Texture buffer of triangle indices.
956   Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
957
958   //! Texture buffer of material properties.
959   Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
960   //! Texture buffer of light source properties.
961   Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
962
963   //! 1st framebuffer (FBO) to perform adaptive FSAA.
964   Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
965   //! 2nd framebuffer (FBO) to perform adaptive FSAA.
966   Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
967   //! Framebuffer (FBO) for preliminary OpenGL output.
968   Handle(OpenGl_FrameBuffer) myOpenGlFBO;
969   Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
970
971   //! Vertex buffer (VBO) for drawing dummy quad.
972   OpenGl_VertexBuffer myRaytraceScreenQuad;
973
974   //! Cached locations of frequently used uniform variables.
975   Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
976
977   //! State of OpenGL structures reflected to ray-tracing.
978   std::map<const OpenGl_Structure*, StructState> myStructureStates;
979
980   //! PrimitiveArray to TriangleSet map for scene partial update.
981   std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
982
983   //! Set of IDs of non-raytracable elements (to detect updates).
984   std::set<Standard_Integer> myNonRaytraceStructureIDs;
985
986   //! Render filter to filter out all raytracable structures.
987   Handle(OpenGl_RaytraceFilter) myRaytraceFilter;
988
989   //! Marks if environment map should be updated.
990   Standard_Boolean myToUpdateEnvironmentMap;
991
992   //! State of OpenGL layer list.
993   Standard_Size myLayerListState;
994
995   //! Number of accumulated frames (for progressive rendering).
996   Standard_Integer myAccumFrames;
997
998   //! Stored ray origins used for detection of camera movements.
999   OpenGl_Vec3 myPreviousOrigins[3];
1000
1001   //! Bullard RNG to produce random sequence.
1002   math_BullardGenerator myRNG;
1003
1004 public:
1005
1006   DEFINE_STANDARD_ALLOC
1007   DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
1008
1009   friend class OpenGl_GraphicDriver;
1010   friend class OpenGl_Workspace;
1011 };
1012
1013 #endif // _OpenGl_View_Header