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_DepthPeeling;
60 class OpenGl_GraphicDriver;
61 class OpenGl_PBREnvironment;
62 class OpenGl_StateCounter;
63 class OpenGl_ShadowMap;
64 class OpenGl_ShadowMapArray;
65 class OpenGl_TriangleSet;
66 class OpenGl_Workspace;
69 DEFINE_STANDARD_HANDLE(OpenGl_View,Graphic3d_CView)
71 //! Implementation of OpenGl view.
72 class OpenGl_View : public Graphic3d_CView
78 Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
79 const Handle(OpenGl_GraphicDriver)& theDriver,
80 const Handle(OpenGl_Caps)& theCaps,
81 OpenGl_StateCounter* theCounter);
83 //! Default destructor.
84 Standard_EXPORT virtual ~OpenGl_View();
86 //! Release OpenGL resources.
87 Standard_EXPORT virtual void ReleaseGlResources (const Handle(OpenGl_Context)& theCtx);
89 //! Deletes and erases the view.
90 Standard_EXPORT virtual void Remove() Standard_OVERRIDE;
92 //! @param theDrawToFrontBuffer Advanced option to modify rendering mode:
93 //! 1. TRUE. Drawing immediate mode structures directly to the front buffer over the scene image.
94 //! Fast, so preferred for interactive work (used by default).
95 //! However these extra drawings will be missed in image dump since it is performed from back buffer.
96 //! Notice that since no pre-buffering used the V-Sync will be ignored and rendering could be seen
97 //! in run-time (in case of slow hardware) and/or tearing may appear.
98 //! So this is strongly recommended to draw only simple (fast) structures.
99 //! 2. FALSE. Drawing immediate mode structures to the back buffer.
100 //! The complete scene is redrawn first, so this mode is slower if scene contains complex data and/or V-Sync
101 //! is turned on. But it works in any case and is especially useful for view dump because the dump image is read
102 //! from the back buffer.
103 //! @return previous mode.
104 Standard_EXPORT Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer) Standard_OVERRIDE;
106 //! Creates and maps rendering window to the view.
107 //! @param theWindow [in] the window.
108 //! @param theContext [in] the rendering context. If NULL the context will be created internally.
109 Standard_EXPORT virtual void SetWindow (const Handle(Aspect_Window)& theWindow,
110 const Aspect_RenderingContext theContext) Standard_OVERRIDE;
112 //! Returns window associated with the view.
113 virtual Handle(Aspect_Window) Window() const Standard_OVERRIDE
114 { return myWindow->PlatformWindow(); }
116 //! Returns True if the window associated to the view is defined.
117 virtual Standard_Boolean IsDefined() const Standard_OVERRIDE
118 { return !myWindow.IsNull(); }
120 //! Handle changing size of the rendering window.
121 Standard_EXPORT virtual void Resized() Standard_OVERRIDE;
123 //! Redraw content of the view.
124 Standard_EXPORT virtual void Redraw() Standard_OVERRIDE;
126 //! Redraw immediate content of the view.
127 Standard_EXPORT virtual void RedrawImmediate() Standard_OVERRIDE;
129 //! Marks BVH tree for given priority list as dirty and marks primitive set for rebuild.
130 Standard_EXPORT virtual void Invalidate() Standard_OVERRIDE;
132 //! Return true if view content cache has been invalidated.
133 virtual Standard_Boolean IsInvalidated() Standard_OVERRIDE { return !myBackBufferRestored; }
135 //! Dump active rendering buffer into specified memory buffer.
136 //! In Ray-Tracing allow to get a raw HDR buffer using Graphic3d_BT_RGB_RayTraceHdrLeft buffer type,
137 //! only Left view will be dumped ignoring stereoscopic parameter.
138 Standard_EXPORT virtual Standard_Boolean BufferDump (Image_PixMap& theImage,
139 const Graphic3d_BufferType& theBufferType) Standard_OVERRIDE;
141 //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
142 Standard_EXPORT virtual void InvalidateBVHData (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
144 //! Add a layer to the view.
145 //! @param theNewLayerId [in] id of new layer, should be > 0 (negative values are reserved for default layers).
146 //! @param theSettings [in] new layer settings
147 //! @param theLayerAfter [in] id of layer to append new layer before
148 Standard_EXPORT virtual void InsertLayerBefore (const Graphic3d_ZLayerId theLayerId,
149 const Graphic3d_ZLayerSettings& theSettings,
150 const Graphic3d_ZLayerId theLayerAfter) Standard_OVERRIDE;
152 //! Add a layer to the view.
153 //! @param theNewLayerId [in] id of new layer, should be > 0 (negative values are reserved for default layers).
154 //! @param theSettings [in] new layer settings
155 //! @param theLayerBefore [in] id of layer to append new layer after
156 Standard_EXPORT virtual void InsertLayerAfter (const Graphic3d_ZLayerId theNewLayerId,
157 const Graphic3d_ZLayerSettings& theSettings,
158 const Graphic3d_ZLayerId theLayerBefore) Standard_OVERRIDE;
160 //! Remove a z layer with the given ID.
161 Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
163 //! Sets the settings for a single Z layer of specified view.
164 Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
165 const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
167 //! Returns the maximum Z layer ID.
168 //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
169 Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
171 //! Returns the list of layers.
172 Standard_EXPORT virtual const NCollection_List<Handle(Graphic3d_Layer)>& Layers() const Standard_OVERRIDE;
174 //! Returns layer with given ID or NULL if undefined.
175 Standard_EXPORT virtual Handle(Graphic3d_Layer) Layer (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
177 //! Returns the bounding box of all structures displayed in the view.
178 //! If theToIncludeAuxiliary is TRUE, then the boundary box also includes minimum and maximum limits
179 //! of graphical elements forming parts of infinite and other auxiliary structures.
180 //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
181 //! @return computed bounding box
182 Standard_EXPORT virtual Bnd_Box MinMaxValues (const Standard_Boolean theToIncludeAuxiliary) const Standard_OVERRIDE;
184 //! Returns pointer to an assigned framebuffer object.
185 Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
187 //! Sets framebuffer object for offscreen rendering.
188 Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
190 //! Generate offscreen FBO in the graphic library.
191 //! If not supported on hardware returns NULL.
192 Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
193 const Standard_Integer theHeight) Standard_OVERRIDE;
195 //! Remove offscreen FBO from the graphic library
196 Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
198 //! Read offscreen FBO configuration.
199 Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
200 Standard_Integer& theWidth,
201 Standard_Integer& theHeight,
202 Standard_Integer& theWidthMax,
203 Standard_Integer& theHeightMax) Standard_OVERRIDE;
205 //! Change offscreen FBO viewport.
206 Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
207 const Standard_Integer theWidth,
208 const Standard_Integer theHeight) Standard_OVERRIDE;
210 //! Returns additional buffers for depth peeling OIT.
211 const Handle(OpenGl_DepthPeeling)& DepthPeelingFbos() const { return myDepthPeelingFbos; }
215 //! Returns gradient background fill colors.
216 Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
218 //! Sets gradient background fill colors.
219 Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
221 //! Returns background image texture map.
222 virtual Handle(Graphic3d_TextureMap) BackgroundImage() Standard_OVERRIDE { return myBackgroundImage; }
224 //! Sets image texture or environment cubemap as background.
225 //! @param theTextureMap [in] source to set a background;
226 //! should be either Graphic3d_Texture2D or Graphic3d_CubeMap
227 //! @param theToUpdatePBREnv [in] defines whether IBL maps will be generated or not
228 //! (see GeneratePBREnvironment())
229 Standard_EXPORT virtual void SetBackgroundImage (const Handle(Graphic3d_TextureMap)& theTextureMap,
230 Standard_Boolean theToUpdatePBREnv = Standard_True) Standard_OVERRIDE;
232 //! Returns background image fill style.
233 Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
235 //! Sets background image fill style.
236 Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
238 //! Returns cubemap being set last time on background.
239 Standard_EXPORT Handle(Graphic3d_CubeMap) BackgroundCubeMap() const Standard_OVERRIDE;
241 //! Generates PBR specular probe and irradiance map
242 //! in order to provide environment indirect illumination in PBR shading model (Image Based Lighting).
243 //! The source of environment data is background cubemap.
244 //! If PBR is unavailable it does nothing.
245 //! If PBR is available but there is no cubemap being set to background it clears all IBL maps (see 'ClearPBREnvironment').
246 virtual void GeneratePBREnvironment() Standard_OVERRIDE { myPBREnvRequest = OpenGl_PBREnvRequest_BAKE; }
248 //! Fills PBR specular probe and irradiance map with white color.
249 //! So that environment indirect illumination will be constant
250 //! and will be fully controlled by ambient light sources.
251 //! If PBR is unavailable it does nothing.
252 virtual void ClearPBREnvironment() Standard_OVERRIDE { myPBREnvRequest = OpenGl_PBREnvRequest_CLEAR; }
254 //! Returns number of mipmap levels used in specular IBL map.
255 //! 0 if PBR environment is not created.
256 Standard_EXPORT unsigned int SpecIBLMapLevels() const;
258 //! Returns environment texture set for the view.
259 virtual Handle(Graphic3d_TextureEnv) TextureEnv() const Standard_OVERRIDE { return myTextureEnvData; }
261 //! Sets environment texture for the view.
262 Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
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 //! Prepare frame buffers for rendering.
359 Standard_EXPORT virtual bool prepareFrameBuffers (Graphic3d_Camera::Projection& theProj);
361 //! Redraws view for the given monographic camera projection, or left/right eye.
362 Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
363 OpenGl_FrameBuffer* theReadDrawFbo,
364 OpenGl_FrameBuffer* theOitAccumFbo);
366 //! Redraws view for the given monographic camera projection, or left/right eye.
368 //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
369 //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
370 //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
371 //! and redraw immediate structures on top.
373 //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
374 //! the first step (blitting) will be skipped.
376 //! @return false if immediate structures has been rendered directly into FrontBuffer
377 //! and Buffer Swap should not be called.
378 Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
379 OpenGl_FrameBuffer* theReadFbo,
380 OpenGl_FrameBuffer* theDrawFbo,
381 OpenGl_FrameBuffer* theOitAccumFbo,
382 const Standard_Boolean theIsPartialUpdate = Standard_False);
384 //! Blit image from/to specified buffers.
385 Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer* theReadFbo,
386 OpenGl_FrameBuffer* theDrawFbo,
387 const Standard_Boolean theToFlip = Standard_False);
389 //! Setup default FBO.
390 Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
392 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
394 //! Renders the graphical contents of the view into the preprepared shadowmap framebuffer.
395 //! @param theShadowMap [in] the framebuffer for rendering shadowmap.
396 Standard_EXPORT virtual void renderShadowMap (const Handle(OpenGl_ShadowMap)& theShadowMap);
398 //! Renders the graphical contents of the view into the preprepared window or framebuffer.
399 //! @param theProjection [in] the projection that should be used for rendering.
400 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
401 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
402 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
403 Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
404 OpenGl_FrameBuffer* theReadDrawFbo,
405 OpenGl_FrameBuffer* theOitAccumFbo,
406 const Standard_Boolean theToDrawImmediate);
408 //! Renders the graphical scene.
409 //! @param theProjection [in] the projection that is used for rendering.
410 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
411 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
412 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
413 Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
414 OpenGl_FrameBuffer* theReadDrawFbo,
415 OpenGl_FrameBuffer* theOitAccumFbo,
416 const Standard_Boolean theToDrawImmediate);
418 //! Draw background (gradient / image)
419 Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace,
420 Graphic3d_Camera::Projection theProjection);
422 //! Render set of structures presented in the view.
423 //! @param theProjection [in] the projection that is used for rendering.
424 //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
425 //! @param theOitAccumFbo [in] the framebuffer for accumulating color and coverage for OIT process.
426 //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
427 Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
428 OpenGl_FrameBuffer* theReadDrawFbo,
429 OpenGl_FrameBuffer* theOitAccumFbo,
430 const Standard_Boolean theToDrawImmediate);
432 //! Renders trihedron.
433 void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
435 //! Renders frame statistics.
436 void renderFrameStats();
440 //! Adds the structure to display lists of the view.
441 Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
442 const Standard_Integer thePriority) Standard_OVERRIDE;
444 //! Erases the structure from display lists of the view.
445 Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
447 //! Change Z layer of a structure already presented in view.
448 Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
449 const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
451 //! Changes the priority of a structure within its Z layer in the specified view.
452 Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
453 const Standard_Integer theNewPriority) Standard_OVERRIDE;
457 //! Release sRGB resources (frame-buffers, textures, etc.).
458 void releaseSrgbResources (const Handle(OpenGl_Context)& theCtx);
460 //! Copy content of Back buffer to the Front buffer.
461 bool copyBackToFront();
463 //! Initialize blit quad.
464 OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
466 //! Blend together views pair into stereo image.
467 void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
469 //! Check and update OIT compatibility with current OpenGL context's state.
470 bool checkOitCompatibility (const Handle(OpenGl_Context)& theGlContext,
471 const Standard_Boolean theMSAA);
473 //! Chooses compatible internal color format for OIT frame buffer.
474 bool chooseOitColorConfiguration (const Handle(OpenGl_Context)& theGlContext,
475 const Standard_Integer theConfigIndex,
476 OpenGl_ColorFormats& theFormats);
480 OpenGl_GraphicDriver* myDriver;
481 Handle(OpenGl_Window) myWindow;
482 Handle(OpenGl_Workspace) myWorkspace;
483 Handle(OpenGl_Caps) myCaps;
484 Standard_Boolean myWasRedrawnGL;
486 Handle(Graphic3d_SequenceOfHClipPlane) myClipPlanes;
487 gp_XYZ myLocalOrigin;
488 Handle(OpenGl_FrameBuffer) myFBO;
489 Standard_Boolean myToShowGradTrihedron;
490 Handle(Graphic3d_TextureMap) myBackgroundImage;
491 Handle(Graphic3d_TextureEnv) myTextureEnvData;
492 Graphic3d_GraduatedTrihedron myGTrihedronData;
494 Handle(Graphic3d_LightSet) myNoShadingLight;
495 Handle(Graphic3d_LightSet) myLights;
496 OpenGl_LayerList myZLayers; //!< main list of displayed structure, sorted by layers
498 Graphic3d_WorldViewProjState myWorldViewProjState; //!< camera modification state
499 OpenGl_StateCounter* myStateCounter;
500 Standard_Size myCurrLightSourceState;
501 Standard_Size myLightsRevision;
503 typedef std::pair<Standard_Size, Standard_Size> StateInfo;
505 StateInfo myLastOrientationState;
506 StateInfo myLastViewMappingState;
507 StateInfo myLastLightSourceState;
509 //! Is needed for selection of overlapping objects and storage of the current view volume
510 Graphic3d_CullingTool myBVHSelector;
512 OpenGl_GraduatedTrihedron myGraduatedTrihedron;
513 OpenGl_FrameStatsPrs myFrameStatsPrs;
515 Handle(OpenGl_TextureSet) myTextureEnv;
517 //! Framebuffers for OpenGL output.
518 Handle(OpenGl_FrameBuffer) myOpenGlFBO;
519 Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
521 protected: //! @name Rendering properties
523 //! Two framebuffers (left and right views) store cached main presentation
524 //! of the view (without presentation of immediate layers).
525 Standard_Integer mySRgbState; //!< track sRGB state
526 GLint myFboColorFormat; //!< sized format for color attachments
527 GLint myFboDepthFormat; //!< sized format for depth-stencil attachments
528 OpenGl_ColorFormats myFboOitColorConfig; //!< selected color format configuration for OIT color attachments
529 Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
530 Handle(OpenGl_FrameBuffer) myMainSceneFbosOit[2]; //!< Additional buffers for transparent draw of main layer.
531 Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2]; //!< Additional buffers for immediate layer in stereo mode.
532 Handle(OpenGl_FrameBuffer) myImmediateSceneFbosOit[2]; //!< Additional buffers for transparency draw of immediate layer.
533 Handle(OpenGl_FrameBuffer) myXrSceneFbo; //!< additional FBO (without MSAA) for submitting to XR
534 Handle(OpenGl_DepthPeeling) myDepthPeelingFbos; //!< additional buffers for depth peeling
535 Handle(OpenGl_ShadowMapArray) myShadowMaps; //!< additional FBOs for shadow map rendering
536 OpenGl_VertexBuffer myFullScreenQuad; //!< Vertices for full-screen quad rendering.
537 OpenGl_VertexBuffer myFullScreenQuadFlip;
538 Standard_Boolean myToFlipOutput; //!< Flag to draw result image upside-down
539 unsigned int myFrameCounter; //!< redraw counter, for debugging
540 Standard_Boolean myHasFboBlit; //!< disable FBOs on failure
541 Standard_Boolean myToDisableOIT; //!< disable OIT on failure
542 Standard_Boolean myToDisableOITMSAA; //!< disable OIT with MSAA on failure
543 Standard_Boolean myToDisableMSAA; //!< disable MSAA after failure
544 Standard_Boolean myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
545 Standard_Boolean myBackBufferRestored;
546 Standard_Boolean myIsImmediateDrawn; //!< flag indicates that immediate mode buffer contains some data
548 protected: //! @name Background parameters
550 OpenGl_Aspects* myTextureParams; //!< Stores texture and its parameters for textured background
551 OpenGl_Aspects* myCubeMapParams; //!< Stores cubemap and its parameters for cubemap background
552 Handle(Graphic3d_CubeMap) myBackgroundCubeMap; //!< Cubemap has been set as background
553 Graphic3d_TypeOfBackground myBackgroundType; //!< Current type of background
554 OpenGl_BackgroundArray* myBackgrounds[Graphic3d_TypeOfBackground_NB]; //!< Array of primitive arrays of different background types
556 protected: //! @name methods related to PBR
558 //! Checks whether PBR is available.
559 Standard_EXPORT Standard_Boolean checkPBRAvailability() const;
561 //! Generates IBL maps used in PBR pipeline.
562 //! If background cubemap is not set clears all IBL maps.
563 Standard_EXPORT void bakePBREnvironment (const Handle(OpenGl_Context)& theCtx);
565 //! Fills all IBL maps with white color.
566 //! So that environment lighting is considered to be constant and is completely controls by ambient light sources.
567 Standard_EXPORT void clearPBREnvironment (const Handle(OpenGl_Context)& theCtx);
569 //! Process requests to generate or to clear PBR environment.
570 Standard_EXPORT void processPBREnvRequest (const Handle(OpenGl_Context)& theCtx);
572 protected: //! @name fields and types related to PBR
574 //! State of PBR environment.
575 enum PBREnvironmentState
577 OpenGl_PBREnvState_NONEXISTENT,
578 OpenGl_PBREnvState_UNAVAILABLE, // indicates failed try to create PBR environment
579 OpenGl_PBREnvState_CREATED
582 //! Type of action which can be done with PBR environment.
583 enum PBREnvironmentRequest
585 OpenGl_PBREnvRequest_NONE,
586 OpenGl_PBREnvRequest_BAKE,
587 OpenGl_PBREnvRequest_CLEAR
590 Handle(OpenGl_PBREnvironment) myPBREnvironment; //!< manager of IBL maps used in PBR pipeline
591 PBREnvironmentState myPBREnvState; //!< state of PBR environment
592 PBREnvironmentRequest myPBREnvRequest; //!< type of action is requested to be done with PBR environment
594 protected: //! @name data types related to ray-tracing
596 //! Result of OpenGL shaders initialization.
597 enum RaytraceInitStatus
604 //! Describes update mode (state).
605 enum RaytraceUpdateMode
607 OpenGl_GUM_CHECK, //!< check geometry state
608 OpenGl_GUM_PREPARE, //!< collect unchanged objects
609 OpenGl_GUM_REBUILD //!< rebuild changed and new objects
612 //! Defines frequently used shader variables.
613 enum ShaderVariableIndex
626 OpenGl_RT_uViewPrMat,
627 OpenGl_RT_uUnviewMat,
632 OpenGl_RT_uLightAmbnt,
633 OpenGl_RT_uLightCount,
636 OpenGl_RT_uBackColorTop,
637 OpenGl_RT_uBackColorBot,
639 // ray-tracing params
640 OpenGl_RT_uShadowsEnabled,
641 OpenGl_RT_uReflectEnabled,
642 OpenGl_RT_uEnvMapEnabled,
643 OpenGl_RT_uEnvMapForBack,
644 OpenGl_RT_uTexSamplersArray,
645 OpenGl_RT_uBlockedRngEnabled,
647 // size of render window
651 // sampled frame params
652 OpenGl_RT_uAccumSamples,
653 OpenGl_RT_uFrameRndSeed,
655 // adaptive FSAA params
656 OpenGl_RT_uFsaaOffset,
659 // images used by ISS mode
660 OpenGl_RT_uRenderImage,
661 OpenGl_RT_uTilesImage,
662 OpenGl_RT_uOffsetImage,
664 OpenGl_RT_uVarianceScaleFactor,
666 // maximum radiance value
667 OpenGl_RT_uMaxRadiance,
669 OpenGl_RT_NbVariables // special field
672 //! Defines OpenGL image samplers.
673 enum ShaderImageNames
675 OpenGl_RT_OutputImage = 0,
676 OpenGl_RT_VisualErrorImage = 1,
677 OpenGl_RT_TileOffsetsImage = 2,
678 OpenGl_RT_TileSamplesImage = 3
681 //! Tool class for management of shader sources.
686 //! Default shader prefix - empty string.
687 static const TCollection_AsciiString EMPTY_PREFIX;
689 //! Creates new uninitialized shader source.
697 //! Returns error description in case of load fail.
698 const TCollection_AsciiString& ErrorDescription() const
703 //! Returns prefix to insert before the source.
704 const TCollection_AsciiString& Prefix() const
709 //! Sets prefix to insert before the source.
710 void SetPrefix (const TCollection_AsciiString& thePrefix)
712 myPrefix = thePrefix;
715 //! Returns shader source combined with prefix.
716 TCollection_AsciiString Source (const Handle(OpenGl_Context)& theCtx,
717 const GLenum theType) const;
719 //! Loads shader source from specified files.
720 Standard_Boolean LoadFromFiles (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
722 //! Loads shader source from specified strings.
723 Standard_Boolean LoadFromStrings (const TCollection_AsciiString* theStrings, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
727 TCollection_AsciiString mySource; //!< Source string of the shader object
728 TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
729 TCollection_AsciiString myError; //!< error state
733 //! Default ray-tracing depth.
734 static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
736 //! Default size of traversal stack.
737 static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
739 //! Compile-time ray-tracing parameters.
740 struct RaytracingParams
742 //! Actual size of traversal stack in shader program.
743 Standard_Integer StackSize;
745 //! Actual ray-tracing depth (number of ray bounces).
746 Standard_Integer NbBounces;
748 //! Define depth computation
749 Standard_Boolean IsZeroToOneDepth;
751 //! Enables/disables light propagation through transparent media.
752 Standard_Boolean TransparentShadows;
754 //! Enables/disables global illumination (GI) effects.
755 Standard_Boolean GlobalIllumination;
757 //! Enables/disables the use of OpenGL bindless textures.
758 Standard_Boolean UseBindlessTextures;
760 //! Enables/disables two-sided BSDF models instead of one-sided.
761 Standard_Boolean TwoSidedBsdfModels;
763 //! Enables/disables adaptive screen sampling for path tracing.
764 Standard_Boolean AdaptiveScreenSampling;
766 //! Enables/disables 1-pass atomic mode for AdaptiveScreenSampling.
767 Standard_Boolean AdaptiveScreenSamplingAtomic;
769 //! Enables/disables environment map for background.
770 Standard_Boolean UseEnvMapForBackground;
772 //! Enables/disables normal map ignoring during path tracing.
773 Standard_Boolean ToIgnoreNormalMap;
775 //! Maximum radiance value used for clamping radiance estimation.
776 Standard_ShortReal RadianceClampingValue;
778 //! Enables/disables depth-of-field effect (path tracing, perspective camera).
779 Standard_Boolean DepthOfField;
781 //! Enables/disables cubemap backgraund.
782 Standard_Boolean CubemapForBack;
784 //! Tone mapping method for path tracing.
785 Graphic3d_ToneMappingMethod ToneMappingMethod;
787 //! Creates default compile-time ray-tracing parameters.
789 : StackSize (THE_DEFAULT_STACK_SIZE),
790 NbBounces (THE_DEFAULT_NB_BOUNCES),
791 IsZeroToOneDepth (Standard_False),
792 TransparentShadows (Standard_False),
793 GlobalIllumination (Standard_False),
794 UseBindlessTextures (Standard_False),
795 TwoSidedBsdfModels (Standard_False),
796 AdaptiveScreenSampling (Standard_False),
797 AdaptiveScreenSamplingAtomic (Standard_False),
798 UseEnvMapForBackground (Standard_False),
799 ToIgnoreNormalMap (Standard_False),
800 RadianceClampingValue (30.0),
801 DepthOfField (Standard_False),
802 CubemapForBack (Standard_False),
803 ToneMappingMethod (Graphic3d_ToneMappingMethod_Disabled) { }
806 //! Describes state of OpenGL structure.
809 Standard_Size StructureState;
810 Standard_Size InstancedState;
812 //! Creates new structure state.
813 StructState (const Standard_Size theStructureState = 0,
814 const Standard_Size theInstancedState = 0)
815 : StructureState (theStructureState),
816 InstancedState (theInstancedState)
821 //! Creates new structure state.
822 StructState (const OpenGl_Structure* theStructure)
824 StructureState = theStructure->ModificationState();
826 InstancedState = theStructure->InstancedStructure() != NULL ?
827 theStructure->InstancedStructure()->ModificationState() : 0;
831 protected: //! @name methods related to ray-tracing
833 //! Updates 3D scene geometry for ray-tracing.
834 Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode theMode,
835 const Standard_Integer theViewId,
836 const Handle(OpenGl_Context)& theGlContext);
838 //! Updates 3D scene light sources for ray-tracing.
839 Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
841 //! Checks to see if the OpenGL structure is modified.
842 Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
844 //! Adds OpenGL structure to ray-traced scene geometry.
845 Standard_Boolean addRaytraceStructure (const OpenGl_Structure* theStructure,
846 const Handle(OpenGl_Context)& theGlContext);
848 //! Adds OpenGL groups to ray-traced scene geometry.
849 Standard_Boolean addRaytraceGroups (const OpenGl_Structure* theStructure,
850 const OpenGl_RaytraceMaterial& theStructMat,
851 const Handle(TopLoc_Datum3D)& theTrsf,
852 const Handle(OpenGl_Context)& theGlContext);
854 //! Creates ray-tracing material properties.
855 OpenGl_RaytraceMaterial convertMaterial (const OpenGl_Aspects* theAspect,
856 const Handle(OpenGl_Context)& theGlContext);
858 //! Adds OpenGL primitive array to ray-traced scene geometry.
859 Handle(OpenGl_TriangleSet) addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
860 const Standard_Integer theMatID,
861 const OpenGl_Mat4* theTrans);
863 //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
864 Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet& theSet,
865 const Standard_Integer theMatID,
866 const Standard_Integer theCount,
867 const Standard_Integer theOffset,
868 const OpenGl_PrimitiveArray& theArray);
870 //! Adds OpenGL triangle array to ray-traced scene geometry.
871 Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet& theSet,
872 const Standard_Integer theMatID,
873 const Standard_Integer theCount,
874 const Standard_Integer theOffset,
875 const Handle(Graphic3d_IndexBuffer)& theIndices);
877 //! Adds OpenGL triangle fan array to ray-traced scene geometry.
878 Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet& theSet,
879 const Standard_Integer theMatID,
880 const Standard_Integer theCount,
881 const Standard_Integer theOffset,
882 const Handle(Graphic3d_IndexBuffer)& theIndices);
884 //! Adds OpenGL triangle strip array to ray-traced scene geometry.
885 Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet& theSet,
886 const Standard_Integer theMatID,
887 const Standard_Integer theCount,
888 const Standard_Integer theOffset,
889 const Handle(Graphic3d_IndexBuffer)& theIndices);
891 //! Adds OpenGL quadrangle array to ray-traced scene geometry.
892 Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet& theSet,
893 const Standard_Integer theMatID,
894 const Standard_Integer theCount,
895 const Standard_Integer theOffset,
896 const Handle(Graphic3d_IndexBuffer)& theIndices);
898 //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
899 Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet& theSet,
900 const Standard_Integer theMatID,
901 const Standard_Integer theCount,
902 const Standard_Integer theOffset,
903 const Handle(Graphic3d_IndexBuffer)& theIndices);
905 //! Adds OpenGL polygon array to ray-traced scene geometry.
906 Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet& theSet,
907 const Standard_Integer theMatID,
908 const Standard_Integer theCount,
909 const Standard_Integer theOffset,
910 const Handle(Graphic3d_IndexBuffer)& theIndices);
912 //! Uploads ray-trace data to the GPU.
913 Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
915 //! Generates shader prefix based on current ray-tracing options.
916 TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
918 //! Performs safe exit when shaders initialization fails.
919 Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
920 const Handle(OpenGl_Context)& theGlContext);
922 //! Loads and compiles shader object from specified source.
923 Handle(OpenGl_ShaderObject) initShader (const GLenum theType,
924 const ShaderSource& theSource,
925 const Handle(OpenGl_Context)& theGlContext);
927 //! Creates shader program from the given vertex and fragment shaders.
928 Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)& theGlContext,
929 const Handle(OpenGl_ShaderObject)& theVertShader,
930 const Handle(OpenGl_ShaderObject)& theFragShader,
931 const TCollection_AsciiString& theName);
933 //! Initializes OpenGL/GLSL shader programs.
934 Standard_Boolean initRaytraceResources (const Standard_Integer theSizeX,
935 const Standard_Integer theSizeY,
936 const Handle(OpenGl_Context)& theGlContext);
938 //! Releases OpenGL/GLSL shader programs.
939 void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext,
940 const Standard_Boolean theToRebuild = Standard_False);
942 //! Updates auxiliary OpenGL frame buffers.
943 Standard_Boolean updateRaytraceBuffers (const Standard_Integer theSizeX,
944 const Standard_Integer theSizeY,
945 const Handle(OpenGl_Context)& theGlContext);
947 //! Generates viewing rays for corners of screen quad.
948 //! (ray tracing; path tracing for orthographic camera)
949 void updateCamera (const OpenGl_Mat4& theOrientation,
950 const OpenGl_Mat4& theViewMapping,
951 OpenGl_Vec3* theOrigins,
952 OpenGl_Vec3* theDirects,
953 OpenGl_Mat4& theView,
954 OpenGl_Mat4& theUnView);
956 //! Generate viewing rays (path tracing, perspective camera).
957 void updatePerspCameraPT(const OpenGl_Mat4& theOrientation,
958 const OpenGl_Mat4& theViewMapping,
959 Graphic3d_Camera::Projection theProjection,
960 OpenGl_Mat4& theViewPr,
961 OpenGl_Mat4& theUnview,
962 const int theWinSizeX,
963 const int theWinSizeY);
965 //! Binds ray-trace textures to corresponding texture units.
966 void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext,
969 //! Unbinds ray-trace textures from corresponding texture unit.
970 void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
972 //! Sets uniform state for the given ray-tracing shader program.
973 Standard_Boolean setUniformState (const Standard_Integer theProgramId,
974 const Standard_Integer theSizeX,
975 const Standard_Integer theSizeY,
976 Graphic3d_Camera::Projection theProjection,
977 const Handle(OpenGl_Context)& theGlContext);
979 //! Runs ray-tracing shader programs.
980 Standard_Boolean runRaytraceShaders (const Standard_Integer theSizeX,
981 const Standard_Integer theSizeY,
982 Graphic3d_Camera::Projection theProjection,
983 OpenGl_FrameBuffer* theReadDrawFbo,
984 const Handle(OpenGl_Context)& theGlContext);
986 //! Runs classical (Whitted-style) ray-tracing kernel.
987 Standard_Boolean runRaytrace (const Standard_Integer theSizeX,
988 const Standard_Integer theSizeY,
989 Graphic3d_Camera::Projection theProjection,
990 OpenGl_FrameBuffer* theReadDrawFbo,
991 const Handle(OpenGl_Context)& theGlContext);
993 //! Runs path tracing (global illumination) kernel.
994 Standard_Boolean runPathtrace (const Standard_Integer theSizeX,
995 const Standard_Integer theSizeY,
996 Graphic3d_Camera::Projection theProjection,
997 const Handle(OpenGl_Context)& theGlContext);
999 //! Runs path tracing (global illumination) kernel.
1000 Standard_Boolean runPathtraceOut (Graphic3d_Camera::Projection theProjection,
1001 OpenGl_FrameBuffer* theReadDrawFbo,
1002 const Handle(OpenGl_Context)& theGlContext);
1004 //! Redraws the window using OpenGL/GLSL ray-tracing or path tracing.
1005 Standard_Boolean raytrace (const Standard_Integer theSizeX,
1006 const Standard_Integer theSizeY,
1007 Graphic3d_Camera::Projection theProjection,
1008 OpenGl_FrameBuffer* theReadDrawFbo,
1009 const Handle(OpenGl_Context)& theGlContext);
1011 protected: //! @name fields related to ray-tracing
1013 //! Result of RT/PT shaders initialization.
1014 RaytraceInitStatus myRaytraceInitStatus;
1016 //! Is ray-tracing geometry data valid?
1017 Standard_Boolean myIsRaytraceDataValid;
1019 //! True if warning about missing extension GL_ARB_bindless_texture has been displayed.
1020 Standard_Boolean myIsRaytraceWarnTextures;
1022 //! 3D scene geometry data for ray-tracing.
1023 OpenGl_RaytraceGeometry myRaytraceGeometry;
1025 //! Builder for triangle set.
1026 opencascade::handle<BVH_Builder<Standard_ShortReal, 3> > myRaytraceBVHBuilder;
1028 //! Compile-time ray-tracing parameters.
1029 RaytracingParams myRaytraceParameters;
1031 //! Radius of bounding sphere of the scene.
1032 Standard_ShortReal myRaytraceSceneRadius;
1033 //! Scene epsilon to prevent self-intersections.
1034 Standard_ShortReal myRaytraceSceneEpsilon;
1036 //! OpenGL/GLSL source of ray-tracing fragment shader.
1037 ShaderSource myRaytraceShaderSource;
1038 //! OpenGL/GLSL source of adaptive-AA fragment shader.
1039 ShaderSource myPostFSAAShaderSource;
1040 //! OpenGL/GLSL source of RT/PT display fragment shader.
1041 ShaderSource myOutImageShaderSource;
1043 //! OpenGL/GLSL ray-tracing fragment shader.
1044 Handle(OpenGl_ShaderObject) myRaytraceShader;
1045 //! OpenGL/GLSL adaptive-AA fragment shader.
1046 Handle(OpenGl_ShaderObject) myPostFSAAShader;
1047 //! OpenGL/GLSL ray-tracing display fragment shader.
1048 Handle(OpenGl_ShaderObject) myOutImageShader;
1050 //! OpenGL/GLSL ray-tracing shader program.
1051 Handle(OpenGl_ShaderProgram) myRaytraceProgram;
1052 //! OpenGL/GLSL adaptive-AA shader program.
1053 Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
1054 //! OpenGL/GLSL program for displaying texture.
1055 Handle(OpenGl_ShaderProgram) myOutImageProgram;
1057 //! Texture buffer of data records of bottom-level BVH nodes.
1058 Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
1059 //! Texture buffer of minimum points of bottom-level BVH nodes.
1060 Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
1061 //! Texture buffer of maximum points of bottom-level BVH nodes.
1062 Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
1063 //! Texture buffer of transformations of high-level BVH nodes.
1064 Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
1066 //! Texture buffer of vertex coords.
1067 Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
1068 //! Texture buffer of vertex normals.
1069 Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
1070 //! Texture buffer of vertex UV coords.
1071 Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
1072 //! Texture buffer of triangle indices.
1073 Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
1075 //! Texture buffer of material properties.
1076 Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
1077 //! Texture buffer of light source properties.
1078 Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
1080 //! 1st framebuffer (FBO) to perform adaptive FSAA.
1081 //! Used in compatibility mode (no adaptive sampling).
1082 Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
1083 //! 2nd framebuffer (FBO) to perform adaptive FSAA.
1084 //! Used in compatibility mode (no adaptive sampling).
1085 Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
1087 //! Output textures (2 textures are used in stereo mode).
1088 //! Used if adaptive screen sampling is activated.
1089 Handle(OpenGl_Texture) myRaytraceOutputTexture[2];
1091 //! Texture containing per-tile visual error estimation (2 textures are used in stereo mode).
1092 //! Used if adaptive screen sampling is activated.
1093 Handle(OpenGl_Texture) myRaytraceVisualErrorTexture[2];
1094 //! Texture containing offsets of sampled screen tiles (2 textures are used in stereo mode).
1095 //! Used if adaptive screen sampling is activated.
1096 Handle(OpenGl_Texture) myRaytraceTileOffsetsTexture[2];
1097 //! Texture containing amount of extra per-tile samples (2 textures are used in stereo mode).
1098 //! Used if adaptive screen sampling is activated.
1099 Handle(OpenGl_Texture) myRaytraceTileSamplesTexture[2];
1101 //! Vertex buffer (VBO) for drawing dummy quad.
1102 OpenGl_VertexBuffer myRaytraceScreenQuad;
1104 //! Cached locations of frequently used uniform variables.
1105 Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
1107 //! State of OpenGL structures reflected to ray-tracing.
1108 std::map<const OpenGl_Structure*, StructState> myStructureStates;
1110 //! PrimitiveArray to TriangleSet map for scene partial update.
1111 std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
1113 //! Set of IDs of non-raytracable elements (to detect updates).
1114 std::set<Standard_Integer> myNonRaytraceStructureIDs;
1116 //! Marks if environment map should be updated.
1117 Standard_Boolean myToUpdateEnvironmentMap;
1119 //! State of OpenGL layer list.
1120 Standard_Size myRaytraceLayerListState;
1122 //! Number of accumulated frames (for progressive rendering).
1123 Standard_Integer myAccumFrames;
1125 //! Stored ray origins used for detection of camera movements.
1126 OpenGl_Vec3 myPreviousOrigins[3];
1128 //! Bullard RNG to produce random sequence.
1129 math_BullardGenerator myRNG;
1131 //! Tool object for sampling screen tiles in PT mode.
1132 OpenGl_TileSampler myTileSampler;
1134 //! Camera position used for projective mode
1135 OpenGl_Vec3 myEyeOrig;
1137 //! Camera view direction used for projective mode
1138 OpenGl_Vec3 myEyeView;
1140 //! Camera's screen vertical direction used for projective mode
1141 OpenGl_Vec3 myEyeVert;
1143 //! Camera's screen horizontal direction used for projective mode
1144 OpenGl_Vec3 myEyeSide;
1146 //! Camera's screen size used for projective mode
1147 OpenGl_Vec2 myEyeSize;
1149 //! Aperture radius of camera on previous frame used for depth-of-field (path tracing)
1150 float myPrevCameraApertureRadius;
1152 //! Focal distance of camera on previous frame used for depth-of-field (path tracing)
1153 float myPrevCameraFocalPlaneDist;
1157 DEFINE_STANDARD_ALLOC
1158 DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
1160 friend class OpenGl_GraphicDriver;
1161 friend class OpenGl_Workspace;
1162 friend class OpenGl_LayerList;
1163 friend class OpenGl_FrameStats;
1166 #endif // _OpenGl_View_Header