1 // Created on: 2011-09-20
2 // Created by: Sergey ZERCHANINOV
3 // Copyright (c) 2011-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
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.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _OpenGl_View_Header
17 #define _OpenGl_View_Header
19 #include <Standard_Transient.hxx>
20 #include <Standard_Type.hxx>
22 #include <TColStd_Array2OfReal.hxx>
23 #include <NCollection_List.hxx>
24 #include <math_BullardGenerator.hxx>
26 #include <Quantity_NameOfColor.hxx>
27 #include <Aspect_FillMethod.hxx>
28 #include <Aspect_GradientFillMethod.hxx>
30 #include <Graphic3d_CView.hxx>
31 #include <Graphic3d_CullingTool.hxx>
32 #include <Graphic3d_GraduatedTrihedron.hxx>
33 #include <Graphic3d_SequenceOfHClipPlane.hxx>
34 #include <Graphic3d_ToneMappingMethod.hxx>
35 #include <Graphic3d_TypeOfShadingModel.hxx>
36 #include <Graphic3d_WorldViewProjState.hxx>
37 #include <Graphic3d_ZLayerSettings.hxx>
39 #include <OpenGl_Aspects.hxx>
40 #include <OpenGl_BackgroundArray.hxx>
41 #include <OpenGl_Context.hxx>
42 #include <OpenGl_FrameBuffer.hxx>
43 #include <OpenGl_FrameStatsPrs.hxx>
44 #include <OpenGl_GraduatedTrihedron.hxx>
45 #include <OpenGl_LayerList.hxx>
46 #include <OpenGl_LineAttributes.hxx>
47 #include <OpenGl_SceneGeometry.hxx>
48 #include <OpenGl_Structure.hxx>
49 #include <OpenGl_Window.hxx>
50 #include <OpenGl_Workspace.hxx>
51 #include <OpenGl_TileSampler.hxx>
58 class Graphic3d_StructureManager;
59 class OpenGl_GraphicDriver;
60 class OpenGl_PBREnvironment;
61 class OpenGl_StateCounter;
62 class OpenGl_TriangleSet;
63 class OpenGl_Workspace;
65 DEFINE_STANDARD_HANDLE(OpenGl_View,Graphic3d_CView)
67 //! Implementation of OpenGl view.
68 class OpenGl_View : public Graphic3d_CView
74 Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
75 const Handle(OpenGl_GraphicDriver)& theDriver,
76 const Handle(OpenGl_Caps)& theCaps,
77 OpenGl_StateCounter* theCounter);
79 //! Default destructor.
80 Standard_EXPORT virtual ~OpenGl_View();
82 //! Release OpenGL resources.
83 Standard_EXPORT void ReleaseGlResources (const Handle(OpenGl_Context)& theCtx);
85 //! Deletes and erases the view.
86 Standard_EXPORT virtual void Remove() Standard_OVERRIDE;
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;
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;
108 //! Returns window associated with the view.
109 virtual Handle(Aspect_Window) Window() const Standard_OVERRIDE
110 { return myWindow->PlatformWindow(); }
112 //! Returns True if the window associated to the view is defined.
113 virtual Standard_Boolean IsDefined() const Standard_OVERRIDE
114 { return !myWindow.IsNull(); }
116 //! Handle changing size of the rendering window.
117 Standard_EXPORT virtual void Resized() Standard_OVERRIDE;
119 //! Redraw content of the view.
120 Standard_EXPORT virtual void Redraw() Standard_OVERRIDE;
122 //! Redraw immediate content of the view.
123 Standard_EXPORT virtual void RedrawImmediate() Standard_OVERRIDE;
125 //! Marks BVH tree for given priority list as dirty and marks primitive set for rebuild.
126 Standard_EXPORT virtual void Invalidate() Standard_OVERRIDE;
128 //! Return true if view content cache has been invalidated.
129 virtual Standard_Boolean IsInvalidated() Standard_OVERRIDE { return !myBackBufferRestored; }
131 //! Dump active rendering buffer into specified memory buffer.
132 //! In Ray-Tracing allow to get a raw HDR buffer using Graphic3d_BT_RGB_RayTraceHdrLeft buffer type,
133 //! only Left view will be dumped ignoring stereoscopic parameter.
134 Standard_EXPORT virtual Standard_Boolean BufferDump (Image_PixMap& theImage,
135 const Graphic3d_BufferType& theBufferType) Standard_OVERRIDE;
137 //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
138 Standard_EXPORT virtual void InvalidateBVHData (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
140 //! Add a layer to the view.
141 //! @param theNewLayerId [in] id of new layer, should be > 0 (negative values are reserved for default layers).
142 //! @param theSettings [in] new layer settings
143 //! @param theLayerAfter [in] id of layer to append new layer before
144 Standard_EXPORT virtual void InsertLayerBefore (const Graphic3d_ZLayerId theLayerId,
145 const Graphic3d_ZLayerSettings& theSettings,
146 const Graphic3d_ZLayerId theLayerAfter) Standard_OVERRIDE;
148 //! Add a layer to the view.
149 //! @param theNewLayerId [in] id of new layer, should be > 0 (negative values are reserved for default layers).
150 //! @param theSettings [in] new layer settings
151 //! @param theLayerBefore [in] id of layer to append new layer after
152 Standard_EXPORT virtual void InsertLayerAfter (const Graphic3d_ZLayerId theNewLayerId,
153 const Graphic3d_ZLayerSettings& theSettings,
154 const Graphic3d_ZLayerId theLayerBefore) Standard_OVERRIDE;
156 //! Remove a z layer with the given ID.
157 Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
159 //! Sets the settings for a single Z layer of specified view.
160 Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
161 const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
163 //! Returns the maximum Z layer ID.
164 //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
165 Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
167 //! Returns the list of layers.
168 Standard_EXPORT virtual const NCollection_List<Handle(Graphic3d_Layer)>& Layers() const Standard_OVERRIDE;
170 //! Returns layer with given ID or NULL if undefined.
171 Standard_EXPORT virtual Handle(Graphic3d_Layer) Layer (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
173 //! Returns the bounding box of all structures displayed in the view.
174 //! If theToIncludeAuxiliary is TRUE, then the boundary box also includes minimum and maximum limits
175 //! of graphical elements forming parts of infinite and other auxiliary structures.
176 //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
177 //! @return computed bounding box
178 Standard_EXPORT virtual Bnd_Box MinMaxValues (const Standard_Boolean theToIncludeAuxiliary) const Standard_OVERRIDE;
180 //! Returns pointer to an assigned framebuffer object.
181 Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
183 //! Sets framebuffer object for offscreen rendering.
184 Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
186 //! Generate offscreen FBO in the graphic library.
187 //! If not supported on hardware returns NULL.
188 Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
189 const Standard_Integer theHeight) Standard_OVERRIDE;
191 //! Remove offscreen FBO from the graphic library
192 Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
194 //! Read offscreen FBO configuration.
195 Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
196 Standard_Integer& theWidth,
197 Standard_Integer& theHeight,
198 Standard_Integer& theWidthMax,
199 Standard_Integer& theHeightMax) Standard_OVERRIDE;
201 //! Change offscreen FBO viewport.
202 Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
203 const Standard_Integer theWidth,
204 const Standard_Integer theHeight) Standard_OVERRIDE;
208 //! Returns gradient background fill colors.
209 Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
211 //! Sets gradient background fill colors.
212 Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
214 //! Returns background image texture file path.
215 virtual TCollection_AsciiString BackgroundImage() Standard_OVERRIDE { return myBackgroundImagePath; }
217 //! Sets background image texture file path.
218 Standard_EXPORT virtual void SetBackgroundImage (const TCollection_AsciiString& theFilePath) Standard_OVERRIDE;
220 //! Returns background image fill style.
221 Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
223 //! Sets background image fill style.
224 Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
226 //! Returns cubemap being set last time on background.
227 Standard_EXPORT Handle(Graphic3d_CubeMap) BackgroundCubeMap() const Standard_OVERRIDE;
229 //! Sets environment cubemap as background.
230 //! @param theCubeMap cubemap source to be set as background
231 //! @param theToUpdatePBREnv defines whether IBL maps will be generated or not (see 'GeneratePBREnvironment')
232 Standard_EXPORT virtual void SetBackgroundCubeMap (const Handle(Graphic3d_CubeMap)& theCubeMap,
233 Standard_Boolean theToUpdatePBREnv = Standard_True) Standard_OVERRIDE;
235 //! Generates PBR specular probe and irradiance map
236 //! in order to provide environment indirect illumination in PBR shading model (Image Based Lighting).
237 //! The source of environment data is background cubemap.
238 //! If PBR is unavailable it does nothing.
239 //! If PBR is available but there is no cubemap being set to background it clears all IBL maps (see 'ClearPBREnvironment').
240 virtual void GeneratePBREnvironment() Standard_OVERRIDE { myPBREnvRequest = OpenGl_PBREnvRequest_BAKE; }
242 //! Fills PBR specular probe and irradiance map with white color.
243 //! So that environment indirect illumination will be constant
244 //! and will be fully controlled by ambient light sources.
245 //! If PBR is unavailable it does nothing.
246 virtual void ClearPBREnvironment() Standard_OVERRIDE { myPBREnvRequest = OpenGl_PBREnvRequest_CLEAR; }
248 //! Returns number of mipmap levels used in specular IBL map.
249 //! 0 if PBR environment is not created.
250 Standard_EXPORT unsigned int SpecIBLMapLevels() const;
252 //! Returns environment texture set for the view.
253 virtual Handle(Graphic3d_TextureEnv) TextureEnv() const Standard_OVERRIDE { return myTextureEnvData; }
255 //! Sets environment texture for the view.
256 Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
258 //! Return backfacing model used for the view.
259 virtual Graphic3d_TypeOfBackfacingModel BackfacingModel() const Standard_OVERRIDE { return myBackfacing; }
261 //! Sets backfacing model for the view.
262 virtual void SetBackfacingModel (const Graphic3d_TypeOfBackfacingModel theModel) Standard_OVERRIDE { myBackfacing = theModel; }
264 //! Returns local camera origin currently set for rendering, might be modified during rendering.
265 const gp_XYZ& LocalOrigin() const { return myLocalOrigin; }
267 //! Setup local camera origin currently set for rendering.
268 Standard_EXPORT void SetLocalOrigin (const gp_XYZ& theOrigin);
270 //! Returns list of lights of the view.
271 virtual const Handle(Graphic3d_LightSet)& Lights() const Standard_OVERRIDE { return myLights; }
273 //! Sets list of lights for the view.
274 virtual void SetLights (const Handle(Graphic3d_LightSet)& theLights) Standard_OVERRIDE
276 myLights = theLights;
277 myCurrLightSourceState = myStateCounter->Increment();
280 //! Returns list of clip planes set for the view.
281 virtual const Handle(Graphic3d_SequenceOfHClipPlane)& ClipPlanes() const Standard_OVERRIDE { return myClipPlanes; }
283 //! Sets list of clip planes for the view.
284 virtual void SetClipPlanes (const Handle(Graphic3d_SequenceOfHClipPlane)& thePlanes) Standard_OVERRIDE { myClipPlanes = thePlanes; }
286 //! Fill in the dictionary with diagnostic info.
287 //! Should be called within rendering thread.
289 //! This API should be used only for user output or for creating automated reports.
290 //! The format of returned information (e.g. key-value layout)
291 //! is NOT part of this API and can be changed at any time.
292 //! Thus application should not parse returned information to weed out specific parameters.
293 Standard_EXPORT virtual void DiagnosticInformation (TColStd_IndexedDataMapOfStringString& theDict,
294 Graphic3d_DiagnosticInfo theFlags) const Standard_OVERRIDE;
296 //! Returns string with statistic performance info.
297 Standard_EXPORT virtual TCollection_AsciiString StatisticInformation() const Standard_OVERRIDE;
299 //! Fills in the dictionary with statistic performance info.
300 Standard_EXPORT virtual void StatisticInformation (TColStd_IndexedDataMapOfStringString& theDict) const Standard_OVERRIDE;
304 //! Returns background color.
305 const Quantity_ColorRGBA& BackgroundColor() const { return myBgColor; }
307 //! Change graduated trihedron.
308 OpenGl_GraduatedTrihedron& ChangeGraduatedTrihedron() { return myGraduatedTrihedron; }
310 void SetTextureEnv (const Handle(OpenGl_Context)& theCtx,
311 const Handle(Graphic3d_TextureEnv)& theTexture);
313 void SetBackgroundTextureStyle (const Aspect_FillMethod FillStyle);
315 void SetBackgroundGradient (const Quantity_Color& AColor1, const Quantity_Color& AColor2, const Aspect_GradientFillMethod AType);
317 void SetBackgroundGradientType (const Aspect_GradientFillMethod AType);
319 //! Returns list of OpenGL Z-layers.
320 const OpenGl_LayerList& LayerList() const { return myZLayers; }
322 //! Returns OpenGL window implementation.
323 const Handle(OpenGl_Window)& GlWindow() const { return myWindow; }
325 //! Returns OpenGL environment map.
326 const Handle(OpenGl_TextureSet)& GlTextureEnv() const { return myTextureEnv; }
328 //! Returns selector for BVH tree, providing a possibility to store information
329 //! about current view volume and to detect which objects are overlapping it.
330 const Graphic3d_CullingTool& BVHTreeSelector() const { return myBVHSelector; }
332 //! Returns true if there are immediate structures to display
333 bool HasImmediateStructures() const
335 return myZLayers.NbImmediateStructures() != 0;
338 public: //! @name obsolete Graduated Trihedron functionality
340 //! Displays Graduated Trihedron.
341 Standard_EXPORT virtual void GraduatedTrihedronDisplay (const Graphic3d_GraduatedTrihedron& theTrihedronData) Standard_OVERRIDE;
343 //! Erases Graduated Trihedron.
344 Standard_EXPORT virtual void GraduatedTrihedronErase() Standard_OVERRIDE;
346 //! Sets minimum and maximum points of scene bounding box for Graduated Trihedron stored in graphic view object.
347 //! @param theMin [in] the minimum point of scene.
348 //! @param theMax [in] the maximum point of scene.
349 Standard_EXPORT virtual void GraduatedTrihedronMinMaxValues (const Graphic3d_Vec3 theMin, const Graphic3d_Vec3 theMax) Standard_OVERRIDE;
351 protected: //! @name Internal methods for managing GL resources
353 //! Initializes OpenGl resource for environment texture.
354 void initTextureEnv (const Handle(OpenGl_Context)& theContext);
356 protected: //! @name low-level redrawing sub-routines
358 //! Redraws view for the given monographic camera projection, or left/right eye.
359 Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
360 OpenGl_FrameBuffer* theReadDrawFbo,
361 OpenGl_FrameBuffer* theOitAccumFbo);
363 //! Redraws view for the given monographic camera projection, or left/right eye.
365 //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
366 //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
367 //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
368 //! and redraw immediate structures on top.
370 //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
371 //! the first step (blitting) will be skipped.
373 //! @return false if immediate structures has been rendered directly into FrontBuffer
374 //! and Buffer Swap should not be called.
375 Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
376 OpenGl_FrameBuffer* theReadFbo,
377 OpenGl_FrameBuffer* theDrawFbo,
378 OpenGl_FrameBuffer* theOitAccumFbo,
379 const Standard_Boolean theIsPartialUpdate = Standard_False);
381 //! Blit image from/to specified buffers.
382 Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer* theReadFbo,
383 OpenGl_FrameBuffer* theDrawFbo,
384 const Standard_Boolean theToFlip = Standard_False);
386 //! Setup default FBO.
387 Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
389 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
391 //! Renders the graphical contents of the view into the preprepared window or framebuffer.
392 //! @param theProjection [in] the projection that should be used for rendering.
393 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
394 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
395 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
396 Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
397 OpenGl_FrameBuffer* theReadDrawFbo,
398 OpenGl_FrameBuffer* theOitAccumFbo,
399 const Standard_Boolean theToDrawImmediate);
401 //! Renders the graphical scene.
402 //! @param theProjection [in] the projection that is used for rendering.
403 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
404 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
405 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
406 Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
407 OpenGl_FrameBuffer* theReadDrawFbo,
408 OpenGl_FrameBuffer* theOitAccumFbo,
409 const Standard_Boolean theToDrawImmediate);
411 //! Draw background (gradient / image)
412 Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace);
414 //! Render set of structures presented in the view.
415 //! @param theProjection [in] the projection that is used for rendering.
416 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
417 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
418 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
419 Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
420 OpenGl_FrameBuffer* theReadDrawFbo,
421 OpenGl_FrameBuffer* theOitAccumFbo,
422 const Standard_Boolean theToDrawImmediate);
424 //! Renders trihedron.
425 void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
427 //! Renders frame statistics.
428 void renderFrameStats();
432 //! Adds the structure to display lists of the view.
433 Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
434 const Standard_Integer thePriority) Standard_OVERRIDE;
436 //! Erases the structure from display lists of the view.
437 Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
439 //! Change Z layer of a structure already presented in view.
440 Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
441 const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
443 //! Changes the priority of a structure within its Z layer in the specified view.
444 Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
445 const Standard_Integer theNewPriority) Standard_OVERRIDE;
449 //! Release sRGB resources (frame-buffers, textures, etc.).
450 void releaseSrgbResources (const Handle(OpenGl_Context)& theCtx);
452 //! Copy content of Back buffer to the Front buffer.
453 bool copyBackToFront();
455 //! Initialize blit quad.
456 OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
458 //! Blend together views pair into stereo image.
459 void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
461 //! Check and update OIT compatibility with current OpenGL context's state.
462 bool checkOitCompatibility (const Handle(OpenGl_Context)& theGlContext,
463 const Standard_Boolean theMSAA);
465 //! Chooses compatible internal color format for OIT frame buffer.
466 bool chooseOitColorConfiguration (const Handle(OpenGl_Context)& theGlContext,
467 const Standard_Integer theConfigIndex,
468 OpenGl_ColorFormats& theFormats);
472 OpenGl_GraphicDriver* myDriver;
473 Handle(OpenGl_Window) myWindow;
474 Handle(OpenGl_Workspace) myWorkspace;
475 Handle(OpenGl_Caps) myCaps;
476 Standard_Boolean myWasRedrawnGL;
478 Graphic3d_TypeOfBackfacingModel myBackfacing;
479 Handle(Graphic3d_SequenceOfHClipPlane) myClipPlanes;
480 gp_XYZ myLocalOrigin;
481 Handle(OpenGl_FrameBuffer) myFBO;
482 Standard_Boolean myToShowGradTrihedron;
483 TCollection_AsciiString myBackgroundImagePath;
484 Handle(Graphic3d_TextureEnv) myTextureEnvData;
485 Graphic3d_GraduatedTrihedron myGTrihedronData;
487 Handle(Graphic3d_LightSet) myNoShadingLight;
488 Handle(Graphic3d_LightSet) myLights;
489 OpenGl_LayerList myZLayers; //!< main list of displayed structure, sorted by layers
491 Graphic3d_WorldViewProjState myWorldViewProjState; //!< camera modification state
492 OpenGl_StateCounter* myStateCounter;
493 Standard_Size myCurrLightSourceState;
494 Standard_Size myLightsRevision;
496 typedef std::pair<Standard_Size, Standard_Size> StateInfo;
498 StateInfo myLastOrientationState;
499 StateInfo myLastViewMappingState;
500 StateInfo myLastLightSourceState;
502 //! Is needed for selection of overlapping objects and storage of the current view volume
503 Graphic3d_CullingTool myBVHSelector;
505 OpenGl_GraduatedTrihedron myGraduatedTrihedron;
506 OpenGl_FrameStatsPrs myFrameStatsPrs;
508 Handle(OpenGl_TextureSet) myTextureEnv;
510 //! Framebuffers for OpenGL output.
511 Handle(OpenGl_FrameBuffer) myOpenGlFBO;
512 Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
514 protected: //! @name Rendering properties
516 //! Two framebuffers (left and right views) store cached main presentation
517 //! of the view (without presentation of immediate layers).
518 Standard_Integer mySRgbState; //!< track sRGB state
519 GLint myFboColorFormat; //!< sized format for color attachments
520 GLint myFboDepthFormat; //!< sized format for depth-stencil attachments
521 OpenGl_ColorFormats myFboOitColorConfig; //!< selected color format configuration for OIT color attachments
522 Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
523 Handle(OpenGl_FrameBuffer) myMainSceneFbosOit[2]; //!< Additional buffers for transparent draw of main layer.
524 Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2]; //!< Additional buffers for immediate layer in stereo mode.
525 Handle(OpenGl_FrameBuffer) myImmediateSceneFbosOit[2]; //!< Additional buffers for transparency draw of immediate layer.
526 OpenGl_VertexBuffer myFullScreenQuad; //!< Vertices for full-screen quad rendering.
527 OpenGl_VertexBuffer myFullScreenQuadFlip;
528 Standard_Boolean myToFlipOutput; //!< Flag to draw result image upside-down
529 unsigned int myFrameCounter; //!< redraw counter, for debugging
530 Standard_Boolean myHasFboBlit; //!< disable FBOs on failure
531 Standard_Boolean myToDisableOIT; //!< disable OIT on failure
532 Standard_Boolean myToDisableOITMSAA; //!< disable OIT with MSAA on failure
533 Standard_Boolean myToDisableMSAA; //!< disable MSAA after failure
534 Standard_Boolean myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
535 Standard_Boolean myBackBufferRestored;
536 Standard_Boolean myIsImmediateDrawn; //!< flag indicates that immediate mode buffer contains some data
538 protected: //! @name Background parameters
540 OpenGl_Aspects* myTextureParams; //!< Stores texture and its parameters for textured background
541 OpenGl_Aspects* myCubeMapParams; //!< Stores cubemap and its parameters for cubemap background
542 Handle(Graphic3d_CubeMap) myBackgroundCubeMap; //!< Cubemap has been set as background
543 Graphic3d_TypeOfBackground myBackgroundType; //!< Current type of background
544 OpenGl_BackgroundArray* myBackgrounds[Graphic3d_TypeOfBackground_NB]; //!< Array of primitive arrays of different background types
546 protected: //! @name methods related to PBR
548 //! Checks whether PBR is available.
549 Standard_EXPORT Standard_Boolean checkPBRAvailability() const;
551 //! Generates IBL maps used in PBR pipeline.
552 //! If background cubemap is not set clears all IBL maps.
553 Standard_EXPORT void bakePBREnvironment (const Handle(OpenGl_Context)& theCtx);
555 //! Fills all IBL maps with white color.
556 //! So that environment lighting is considered to be constant and is completely controls by ambient light sources.
557 Standard_EXPORT void clearPBREnvironment (const Handle(OpenGl_Context)& theCtx);
559 //! Process requests to generate or to clear PBR environment.
560 Standard_EXPORT void processPBREnvRequest (const Handle(OpenGl_Context)& theCtx);
562 protected: //! @name fields and types related to PBR
564 //! State of PBR environment.
565 enum PBREnvironmentState
567 OpenGl_PBREnvState_NONEXISTENT,
568 OpenGl_PBREnvState_UNAVAILABLE, // indicates failed try to create PBR environment
569 OpenGl_PBREnvState_CREATED
572 //! Type of action which can be done with PBR environment.
573 enum PBREnvironmentRequest
575 OpenGl_PBREnvRequest_NONE,
576 OpenGl_PBREnvRequest_BAKE,
577 OpenGl_PBREnvRequest_CLEAR
580 Handle(OpenGl_PBREnvironment) myPBREnvironment; //!< manager of IBL maps used in PBR pipeline
581 PBREnvironmentState myPBREnvState; //!< state of PBR environment
582 PBREnvironmentRequest myPBREnvRequest; //!< type of action is requested to be done with PBR environment
584 protected: //! @name data types related to ray-tracing
586 //! Result of OpenGL shaders initialization.
587 enum RaytraceInitStatus
594 //! Describes update mode (state).
595 enum RaytraceUpdateMode
597 OpenGl_GUM_CHECK, //!< check geometry state
598 OpenGl_GUM_PREPARE, //!< collect unchanged objects
599 OpenGl_GUM_REBUILD //!< rebuild changed and new objects
602 //! Defines frequently used shader variables.
603 enum ShaderVariableIndex
616 OpenGl_RT_uViewPrMat,
617 OpenGl_RT_uUnviewMat,
622 OpenGl_RT_uLightAmbnt,
623 OpenGl_RT_uLightCount,
626 OpenGl_RT_uBackColorTop,
627 OpenGl_RT_uBackColorBot,
629 // ray-tracing params
630 OpenGl_RT_uShadowsEnabled,
631 OpenGl_RT_uReflectEnabled,
632 OpenGl_RT_uSphereMapEnabled,
633 OpenGl_RT_uSphereMapForBack,
634 OpenGl_RT_uTexSamplersArray,
635 OpenGl_RT_uBlockedRngEnabled,
637 // size of render window
641 // sampled frame params
642 OpenGl_RT_uAccumSamples,
643 OpenGl_RT_uFrameRndSeed,
645 // adaptive FSAA params
650 // images used by ISS mode
651 OpenGl_RT_uRenderImage,
652 OpenGl_RT_uTilesImage,
653 OpenGl_RT_uOffsetImage,
655 OpenGl_RT_uVarianceScaleFactor,
657 // maximum radiance value
658 OpenGl_RT_uMaxRadiance,
660 OpenGl_RT_NbVariables // special field
663 //! Defines OpenGL image samplers.
664 enum ShaderImageNames
666 OpenGl_RT_OutputImage = 0,
667 OpenGl_RT_VisualErrorImage = 1,
668 OpenGl_RT_TileOffsetsImage = 2,
669 OpenGl_RT_TileSamplesImage = 3
672 //! Tool class for management of shader sources.
677 //! Default shader prefix - empty string.
678 static const TCollection_AsciiString EMPTY_PREFIX;
680 //! Creates new uninitialized shader source.
688 //! Returns error description in case of load fail.
689 const TCollection_AsciiString& ErrorDescription() const
694 //! Returns prefix to insert before the source.
695 const TCollection_AsciiString& Prefix() const
700 //! Sets prefix to insert before the source.
701 void SetPrefix (const TCollection_AsciiString& thePrefix)
703 myPrefix = thePrefix;
706 //! Returns shader source combined with prefix.
707 TCollection_AsciiString Source() const;
709 //! Loads shader source from specified files.
710 Standard_Boolean LoadFromFiles (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
712 //! Loads shader source from specified strings.
713 Standard_Boolean LoadFromStrings (const TCollection_AsciiString* theStrings, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
717 TCollection_AsciiString mySource; //!< Source string of the shader object
718 TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
719 TCollection_AsciiString myError; //!< error state
723 //! Default ray-tracing depth.
724 static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
726 //! Default size of traversal stack.
727 static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
729 //! Compile-time ray-tracing parameters.
730 struct RaytracingParams
732 //! Actual size of traversal stack in shader program.
733 Standard_Integer StackSize;
735 //! Actual ray-tracing depth (number of ray bounces).
736 Standard_Integer NbBounces;
738 //! Enables/disables light propagation through transparent media.
739 Standard_Boolean TransparentShadows;
741 //! Enables/disables global illumination (GI) effects.
742 Standard_Boolean GlobalIllumination;
744 //! Enables/disables the use of OpenGL bindless textures.
745 Standard_Boolean UseBindlessTextures;
747 //! Enables/disables two-sided BSDF models instead of one-sided.
748 Standard_Boolean TwoSidedBsdfModels;
750 //! Enables/disables adaptive screen sampling for path tracing.
751 Standard_Boolean AdaptiveScreenSampling;
753 //! Enables/disables 1-pass atomic mode for AdaptiveScreenSampling.
754 Standard_Boolean AdaptiveScreenSamplingAtomic;
756 //! Enables/disables environment map for background.
757 Standard_Boolean UseEnvMapForBackground;
759 //! Maximum radiance value used for clamping radiance estimation.
760 Standard_ShortReal RadianceClampingValue;
762 //! Enables/disables depth-of-field effect (path tracing, perspective camera).
763 Standard_Boolean DepthOfField;
765 //! Tone mapping method for path tracing.
766 Graphic3d_ToneMappingMethod ToneMappingMethod;
768 //! Creates default compile-time ray-tracing parameters.
770 : StackSize (THE_DEFAULT_STACK_SIZE),
771 NbBounces (THE_DEFAULT_NB_BOUNCES),
772 TransparentShadows (Standard_False),
773 GlobalIllumination (Standard_False),
774 UseBindlessTextures (Standard_False),
775 TwoSidedBsdfModels (Standard_False),
776 AdaptiveScreenSampling (Standard_False),
777 AdaptiveScreenSamplingAtomic (Standard_False),
778 UseEnvMapForBackground (Standard_False),
779 RadianceClampingValue (30.0),
780 DepthOfField (Standard_False),
781 ToneMappingMethod (Graphic3d_ToneMappingMethod_Disabled) { }
784 //! Describes state of OpenGL structure.
787 Standard_Size StructureState;
788 Standard_Size InstancedState;
790 //! Creates new structure state.
791 StructState (const Standard_Size theStructureState = 0,
792 const Standard_Size theInstancedState = 0)
793 : StructureState (theStructureState),
794 InstancedState (theInstancedState)
799 //! Creates new structure state.
800 StructState (const OpenGl_Structure* theStructure)
802 StructureState = theStructure->ModificationState();
804 InstancedState = theStructure->InstancedStructure() != NULL ?
805 theStructure->InstancedStructure()->ModificationState() : 0;
809 protected: //! @name methods related to ray-tracing
811 //! Updates 3D scene geometry for ray-tracing.
812 Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode theMode,
813 const Standard_Integer theViewId,
814 const Handle(OpenGl_Context)& theGlContext);
816 //! Updates 3D scene light sources for ray-tracing.
817 Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
819 //! Checks to see if the OpenGL structure is modified.
820 Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
822 //! Adds OpenGL structure to ray-traced scene geometry.
823 Standard_Boolean addRaytraceStructure (const OpenGl_Structure* theStructure,
824 const Handle(OpenGl_Context)& theGlContext);
826 //! Adds OpenGL groups to ray-traced scene geometry.
827 Standard_Boolean addRaytraceGroups (const OpenGl_Structure* theStructure,
828 const OpenGl_RaytraceMaterial& theStructMat,
829 const Handle(Geom_Transformation)& theTrsf,
830 const Handle(OpenGl_Context)& theGlContext);
832 //! Creates ray-tracing material properties.
833 OpenGl_RaytraceMaterial convertMaterial (const OpenGl_Aspects* theAspect,
834 const Handle(OpenGl_Context)& theGlContext);
836 //! Adds OpenGL primitive array to ray-traced scene geometry.
837 Handle(OpenGl_TriangleSet) addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
838 const Standard_Integer theMatID,
839 const OpenGl_Mat4* theTrans);
841 //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
842 Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet& theSet,
843 const Standard_Integer theMatID,
844 const Standard_Integer theCount,
845 const Standard_Integer theOffset,
846 const OpenGl_PrimitiveArray& theArray);
848 //! Adds OpenGL triangle array to ray-traced scene geometry.
849 Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet& theSet,
850 const Standard_Integer theMatID,
851 const Standard_Integer theCount,
852 const Standard_Integer theOffset,
853 const Handle(Graphic3d_IndexBuffer)& theIndices);
855 //! Adds OpenGL triangle fan array to ray-traced scene geometry.
856 Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet& theSet,
857 const Standard_Integer theMatID,
858 const Standard_Integer theCount,
859 const Standard_Integer theOffset,
860 const Handle(Graphic3d_IndexBuffer)& theIndices);
862 //! Adds OpenGL triangle strip array to ray-traced scene geometry.
863 Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet& theSet,
864 const Standard_Integer theMatID,
865 const Standard_Integer theCount,
866 const Standard_Integer theOffset,
867 const Handle(Graphic3d_IndexBuffer)& theIndices);
869 //! Adds OpenGL quadrangle array to ray-traced scene geometry.
870 Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet& theSet,
871 const Standard_Integer theMatID,
872 const Standard_Integer theCount,
873 const Standard_Integer theOffset,
874 const Handle(Graphic3d_IndexBuffer)& theIndices);
876 //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
877 Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet& theSet,
878 const Standard_Integer theMatID,
879 const Standard_Integer theCount,
880 const Standard_Integer theOffset,
881 const Handle(Graphic3d_IndexBuffer)& theIndices);
883 //! Adds OpenGL polygon array to ray-traced scene geometry.
884 Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet& theSet,
885 const Standard_Integer theMatID,
886 const Standard_Integer theCount,
887 const Standard_Integer theOffset,
888 const Handle(Graphic3d_IndexBuffer)& theIndices);
890 //! Uploads ray-trace data to the GPU.
891 Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
893 //! Generates shader prefix based on current ray-tracing options.
894 TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
896 //! Performs safe exit when shaders initialization fails.
897 Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
898 const Handle(OpenGl_Context)& theGlContext);
900 //! Loads and compiles shader object from specified source.
901 Handle(OpenGl_ShaderObject) initShader (const GLenum theType,
902 const ShaderSource& theSource,
903 const Handle(OpenGl_Context)& theGlContext);
905 //! Creates shader program from the given vertex and fragment shaders.
906 Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)& theGlContext,
907 const Handle(OpenGl_ShaderObject)& theVertShader,
908 const Handle(OpenGl_ShaderObject)& theFragShader,
909 const TCollection_AsciiString& theName);
911 //! Initializes OpenGL/GLSL shader programs.
912 Standard_Boolean initRaytraceResources (const Standard_Integer theSizeX,
913 const Standard_Integer theSizeY,
914 const Handle(OpenGl_Context)& theGlContext);
916 //! Releases OpenGL/GLSL shader programs.
917 void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext,
918 const Standard_Boolean theToRebuild = Standard_False);
920 //! Updates auxiliary OpenGL frame buffers.
921 Standard_Boolean updateRaytraceBuffers (const Standard_Integer theSizeX,
922 const Standard_Integer theSizeY,
923 const Handle(OpenGl_Context)& theGlContext);
925 //! Generates viewing rays for corners of screen quad.
926 //! (ray tracing; path tracing for orthographic camera)
927 void updateCamera (const OpenGl_Mat4& theOrientation,
928 const OpenGl_Mat4& theViewMapping,
929 OpenGl_Vec3* theOrigins,
930 OpenGl_Vec3* theDirects,
931 OpenGl_Mat4& theView,
932 OpenGl_Mat4& theUnView);
934 //! Generate viewing rays (path tracing, perspective camera).
935 void updatePerspCameraPT(const OpenGl_Mat4& theOrientation,
936 const OpenGl_Mat4& theViewMapping,
937 Graphic3d_Camera::Projection theProjection,
938 OpenGl_Mat4& theViewPr,
939 OpenGl_Mat4& theUnview,
940 const int theWinSizeX,
941 const int theWinSizeY);
943 //! Binds ray-trace textures to corresponding texture units.
944 void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext,
947 //! Unbinds ray-trace textures from corresponding texture unit.
948 void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
950 //! Sets uniform state for the given ray-tracing shader program.
951 Standard_Boolean setUniformState (const Standard_Integer theProgramId,
952 const Standard_Integer theSizeX,
953 const Standard_Integer theSizeY,
954 Graphic3d_Camera::Projection theProjection,
955 const Handle(OpenGl_Context)& theGlContext);
957 //! Runs ray-tracing shader programs.
958 Standard_Boolean runRaytraceShaders (const Standard_Integer theSizeX,
959 const Standard_Integer theSizeY,
960 Graphic3d_Camera::Projection theProjection,
961 OpenGl_FrameBuffer* theReadDrawFbo,
962 const Handle(OpenGl_Context)& theGlContext);
964 //! Runs classical (Whitted-style) ray-tracing kernel.
965 Standard_Boolean runRaytrace (const Standard_Integer theSizeX,
966 const Standard_Integer theSizeY,
967 Graphic3d_Camera::Projection theProjection,
968 OpenGl_FrameBuffer* theReadDrawFbo,
969 const Handle(OpenGl_Context)& theGlContext);
971 //! Runs path tracing (global illumination) kernel.
972 Standard_Boolean runPathtrace (const Standard_Integer theSizeX,
973 const Standard_Integer theSizeY,
974 Graphic3d_Camera::Projection theProjection,
975 const Handle(OpenGl_Context)& theGlContext);
977 //! Runs path tracing (global illumination) kernel.
978 Standard_Boolean runPathtraceOut (Graphic3d_Camera::Projection theProjection,
979 OpenGl_FrameBuffer* theReadDrawFbo,
980 const Handle(OpenGl_Context)& theGlContext);
982 //! Redraws the window using OpenGL/GLSL ray-tracing or path tracing.
983 Standard_Boolean raytrace (const Standard_Integer theSizeX,
984 const Standard_Integer theSizeY,
985 Graphic3d_Camera::Projection theProjection,
986 OpenGl_FrameBuffer* theReadDrawFbo,
987 const Handle(OpenGl_Context)& theGlContext);
989 protected: //! @name fields related to ray-tracing
991 //! Result of RT/PT shaders initialization.
992 RaytraceInitStatus myRaytraceInitStatus;
994 //! Is ray-tracing geometry data valid?
995 Standard_Boolean myIsRaytraceDataValid;
997 //! True if warning about missing extension GL_ARB_bindless_texture has been displayed.
998 Standard_Boolean myIsRaytraceWarnTextures;
1000 //! 3D scene geometry data for ray-tracing.
1001 OpenGl_RaytraceGeometry myRaytraceGeometry;
1003 //! Builder for triangle set.
1004 opencascade::handle<BVH_Builder<Standard_ShortReal, 3> > myRaytraceBVHBuilder;
1006 //! Compile-time ray-tracing parameters.
1007 RaytracingParams myRaytraceParameters;
1009 //! Radius of bounding sphere of the scene.
1010 Standard_ShortReal myRaytraceSceneRadius;
1011 //! Scene epsilon to prevent self-intersections.
1012 Standard_ShortReal myRaytraceSceneEpsilon;
1014 //! OpenGL/GLSL source of ray-tracing fragment shader.
1015 ShaderSource myRaytraceShaderSource;
1016 //! OpenGL/GLSL source of adaptive-AA fragment shader.
1017 ShaderSource myPostFSAAShaderSource;
1018 //! OpenGL/GLSL source of RT/PT display fragment shader.
1019 ShaderSource myOutImageShaderSource;
1021 //! OpenGL/GLSL ray-tracing fragment shader.
1022 Handle(OpenGl_ShaderObject) myRaytraceShader;
1023 //! OpenGL/GLSL adaptive-AA fragment shader.
1024 Handle(OpenGl_ShaderObject) myPostFSAAShader;
1025 //! OpenGL/GLSL ray-tracing display fragment shader.
1026 Handle(OpenGl_ShaderObject) myOutImageShader;
1028 //! OpenGL/GLSL ray-tracing shader program.
1029 Handle(OpenGl_ShaderProgram) myRaytraceProgram;
1030 //! OpenGL/GLSL adaptive-AA shader program.
1031 Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
1032 //! OpenGL/GLSL program for displaying texture.
1033 Handle(OpenGl_ShaderProgram) myOutImageProgram;
1035 //! Texture buffer of data records of bottom-level BVH nodes.
1036 Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
1037 //! Texture buffer of minimum points of bottom-level BVH nodes.
1038 Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
1039 //! Texture buffer of maximum points of bottom-level BVH nodes.
1040 Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
1041 //! Texture buffer of transformations of high-level BVH nodes.
1042 Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
1044 //! Texture buffer of vertex coords.
1045 Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
1046 //! Texture buffer of vertex normals.
1047 Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
1048 //! Texture buffer of vertex UV coords.
1049 Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
1050 //! Texture buffer of triangle indices.
1051 Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
1053 //! Texture buffer of material properties.
1054 Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
1055 //! Texture buffer of light source properties.
1056 Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
1058 //! 1st framebuffer (FBO) to perform adaptive FSAA.
1059 //! Used in compatibility mode (no adaptive sampling).
1060 Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
1061 //! 2nd framebuffer (FBO) to perform adaptive FSAA.
1062 //! Used in compatibility mode (no adaptive sampling).
1063 Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
1065 //! Output textures (2 textures are used in stereo mode).
1066 //! Used if adaptive screen sampling is activated.
1067 Handle(OpenGl_Texture) myRaytraceOutputTexture[2];
1069 //! Texture containing per-tile visual error estimation (2 textures are used in stereo mode).
1070 //! Used if adaptive screen sampling is activated.
1071 Handle(OpenGl_Texture) myRaytraceVisualErrorTexture[2];
1072 //! Texture containing offsets of sampled screen tiles (2 textures are used in stereo mode).
1073 //! Used if adaptive screen sampling is activated.
1074 Handle(OpenGl_Texture) myRaytraceTileOffsetsTexture[2];
1075 //! Texture containing amount of extra per-tile samples (2 textures are used in stereo mode).
1076 //! Used if adaptive screen sampling is activated.
1077 Handle(OpenGl_Texture) myRaytraceTileSamplesTexture[2];
1079 //! Vertex buffer (VBO) for drawing dummy quad.
1080 OpenGl_VertexBuffer myRaytraceScreenQuad;
1082 //! Cached locations of frequently used uniform variables.
1083 Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
1085 //! State of OpenGL structures reflected to ray-tracing.
1086 std::map<const OpenGl_Structure*, StructState> myStructureStates;
1088 //! PrimitiveArray to TriangleSet map for scene partial update.
1089 std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
1091 //! Set of IDs of non-raytracable elements (to detect updates).
1092 std::set<Standard_Integer> myNonRaytraceStructureIDs;
1094 //! Marks if environment map should be updated.
1095 Standard_Boolean myToUpdateEnvironmentMap;
1097 //! State of OpenGL layer list.
1098 Standard_Size myRaytraceLayerListState;
1100 //! Number of accumulated frames (for progressive rendering).
1101 Standard_Integer myAccumFrames;
1103 //! Stored ray origins used for detection of camera movements.
1104 OpenGl_Vec3 myPreviousOrigins[3];
1106 //! Bullard RNG to produce random sequence.
1107 math_BullardGenerator myRNG;
1109 //! Tool object for sampling screen tiles in PT mode.
1110 OpenGl_TileSampler myTileSampler;
1112 //! Camera position used for projective mode
1113 OpenGl_Vec3 myEyeOrig;
1115 //! Camera view direction used for projective mode
1116 OpenGl_Vec3 myEyeView;
1118 //! Camera's screen vertical direction used for projective mode
1119 OpenGl_Vec3 myEyeVert;
1121 //! Camera's screen horizontal direction used for projective mode
1122 OpenGl_Vec3 myEyeSide;
1124 //! Camera's screen size used for projective mode
1125 OpenGl_Vec2 myEyeSize;
1127 //! Aperture radius of camera on previous frame used for depth-of-field (path tracing)
1128 float myPrevCameraApertureRadius;
1130 //! Focal distance of camera on previous frame used for depth-of-field (path tracing)
1131 float myPrevCameraFocalPlaneDist;
1135 DEFINE_STANDARD_ALLOC
1136 DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
1138 friend class OpenGl_GraphicDriver;
1139 friend class OpenGl_Workspace;
1140 friend class OpenGl_LayerList;
1141 friend class OpenGl_FrameStats;
1144 #endif // _OpenGl_View_Header