1 // Created on: 2011-09-20
2 // Created by: Sergey ZERCHANINOV
3 // Copyright (c) 2011-2013 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_Workspace_Header
17 #define _OpenGl_Workspace_Header
22 #include <Handle_OpenGl_Workspace.hxx>
23 #include <OpenGl_Window.hxx>
25 #include <TColStd_Array2OfReal.hxx>
26 #include <Quantity_Color.hxx>
27 #include <Graphic3d_CView.hxx>
28 #include <Graphic3d_TypeOfComposition.hxx>
29 #include <Graphic3d_TypeOfTexture.hxx>
30 #include <Graphic3d_PtrFrameBuffer.hxx>
31 #include <Graphic3d_BufferType.hxx>
32 #include <Handle_Graphic3d_TextureParams.hxx>
34 #include <Aspect_CLayer2d.hxx>
35 #include <Aspect_Handle.hxx>
36 #include <Aspect_PrintAlgo.hxx>
37 #include <Aspect_PolygonOffsetMode.hxx>
39 #include <InterfaceGraphic_Graphic3d.hxx>
40 #include <InterfaceGraphic_Visual3d.hxx>
42 #include <NCollection_Sequence.hxx>
44 #include <OpenGl_AspectFace.hxx>
45 #include <OpenGl_FrameBuffer.hxx>
46 #include <OpenGl_Matrix.hxx>
47 #include <OpenGl_NamedStatus.hxx>
48 #include <OpenGl_PrinterContext.hxx>
49 #include <OpenGl_SceneGeometry.hxx>
50 #include <OpenGl_TextParam.hxx>
51 #include <OpenGl_RenderFilter.hxx>
52 #include <OpenGl_Vec.hxx>
53 #include <OpenGl_LineAttributes.hxx>
55 #include <Handle_OpenGl_View.hxx>
56 #include <Handle_OpenGl_Texture.hxx>
58 #include <OpenGl_ShaderObject.hxx>
59 #include <OpenGl_ShaderProgram.hxx>
60 #include <OpenGl_TextureBufferArb.hxx>
62 class OpenGl_AspectLine;
63 class OpenGl_AspectMarker;
64 class OpenGl_AspectText;
65 class OpenGl_FrameBuffer;
66 class OpenGl_Structure;
67 class OpenGl_TriangleSet;
71 //! OpenGL material definition
72 struct OpenGl_Material
75 OpenGl_Vec4 Ambient; //!< ambient reflection coefficient
76 OpenGl_Vec4 Diffuse; //!< diffuse reflection coefficient
77 OpenGl_Vec4 Specular; //!< glossy reflection coefficient
78 OpenGl_Vec4 Emission; //!< material emission
79 OpenGl_Vec4 Params; //!< extra packed parameters
81 Standard_ShortReal Shine() const { return Params.x(); }
82 Standard_ShortReal& ChangeShine() { return Params.x(); }
84 Standard_ShortReal Transparency() const { return Params.y(); }
85 Standard_ShortReal& ChangeTransparency() { return Params.y(); }
87 //! Initialize material
88 void Init (const OPENGL_SURF_PROP& theProps);
90 //! Returns packed (serialized) representation of material properties
91 const OpenGl_Vec4* Packed() const { return reinterpret_cast<const OpenGl_Vec4*> (this); }
92 static Standard_Integer NbOfVec4() { return 5; }
96 DEFINE_STANDARD_HANDLE (OpenGl_RaytraceFilter, OpenGl_RenderFilter)
98 //! Graphical ray-tracing filter.
99 //! Filters out all raytracable structures.
100 class OpenGl_RaytraceFilter : public OpenGl_RenderFilter
104 //! Default constructor.
105 OpenGl_RaytraceFilter() {}
107 //! Remembers the previously set filter.
108 inline void SetPrevRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
110 myPrevRenderFilter = theFilter;
113 //! Checks whether the element can be rendered or not.
114 //! @param theElement [in] the element to check.
115 //! @return True if element can be rendered.
116 virtual Standard_Boolean CanRender (const OpenGl_Element* theElement);
120 Handle(OpenGl_RenderFilter) myPrevRenderFilter;
124 DEFINE_STANDARD_RTTI(OpenGl_RaytraceFilter)
127 //! Represents window with GL context.
128 //! Provides methods to render primitives and maintain GL state.
129 class OpenGl_Workspace : public OpenGl_Window
133 //! Main constructor - prepare GL context for specified window.
134 OpenGl_Workspace (const Handle(OpenGl_GraphicDriver)& theDriver,
135 const CALL_DEF_WINDOW& theCWindow,
136 Aspect_RenderingContext theGContext,
137 const Handle(OpenGl_Caps)& theCaps,
138 const Handle(OpenGl_Context)& theShareCtx);
141 virtual ~OpenGl_Workspace();
143 void SetActiveView (const Handle(OpenGl_View)& theView) { myView = theView; }
144 const Handle(OpenGl_View)& ActiveView () const { return myView; }
146 //! Redraw the window.
147 void Redraw (const Graphic3d_CView& theCView,
148 const Aspect_CLayer2d& theCUnderLayer,
149 const Aspect_CLayer2d& theCOverLayer);
151 Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer);
152 void RedrawImmediate (const Graphic3d_CView& theCView,
153 const Aspect_CLayer2d& theCUnderLayer,
154 const Aspect_CLayer2d& theCOverLayer,
155 const Standard_Boolean theToForce = Standard_False);
157 void Invalidate (const Graphic3d_CView& /*theCView*/)
159 myBackBufferRestored = Standard_False;
162 //! Special method to perform printing.
163 //! System-specific and currently only Win platform implemented.
164 Standard_Boolean Print (const Handle(OpenGl_PrinterContext)& thePrintContext,
165 const Graphic3d_CView& theCView,
166 const Aspect_CLayer2d& theCUnderLayer,
167 const Aspect_CLayer2d& theCOverLayer,
168 const Aspect_Handle theHPrintDC,
169 const Standard_Boolean theToShowBackground,
170 const Standard_CString theFileName,
171 const Aspect_PrintAlgo thePrintAlgorithm,
172 const Standard_Real theScaleFactor);
174 const Handle(OpenGl_PrinterContext)& PrinterContext() const
176 return myPrintContext;
179 void DisplayCallback (const Graphic3d_CView& theCView, int theReason);
181 Graphic3d_PtrFrameBuffer FBOCreate (const Standard_Integer theWidth, const Standard_Integer theHeight);
182 void FBORelease (Graphic3d_PtrFrameBuffer theFBOPtr);
183 Standard_Boolean BufferDump (OpenGl_FrameBuffer* theFBOPtr,
184 Image_PixMap& theImage,
185 const Graphic3d_BufferType& theBufferType);
187 Standard_Boolean& UseZBuffer() { return myUseZBuffer; }
188 Standard_Boolean& UseDepthTest() { return myUseDepthTest; }
189 Standard_Boolean& UseGLLight() { return myUseGLLight; }
191 Standard_Integer AntiAliasingMode() const { return myAntiAliasingMode; }
193 //// RELATED TO STATUS ////
195 Standard_Integer NamedStatus;
197 const TEL_COLOUR* HighlightColor;
199 const OpenGl_AspectLine* SetAspectLine (const OpenGl_AspectLine* theAspect);
200 const OpenGl_AspectFace* SetAspectFace (const OpenGl_AspectFace* theAspect);
201 const OpenGl_AspectMarker* SetAspectMarker (const OpenGl_AspectMarker* theAspect);
202 const OpenGl_AspectText* SetAspectText (const OpenGl_AspectText* theAspect);
204 void SetTextParam (const OpenGl_TextParam* theParam) { TextParam_set = theParam; }
206 //// THESE METHODS ARE EXPORTED AS THEY PROVIDE STATE INFO TO USERDRAW
207 Standard_EXPORT const OpenGl_AspectLine* AspectLine (const Standard_Boolean theWithApply);
208 Standard_EXPORT const OpenGl_AspectFace* AspectFace (const Standard_Boolean theWithApply);
209 Standard_EXPORT const OpenGl_AspectMarker* AspectMarker (const Standard_Boolean theWithApply);
210 Standard_EXPORT const OpenGl_AspectText* AspectText (const Standard_Boolean theWithApply);
211 inline const OpenGl_TextParam* AspectTextParams() const
213 return TextParam_applied;
216 //! Clear the applied aspect state.
217 void ResetAppliedAspect();
219 Standard_EXPORT Handle(OpenGl_Texture) DisableTexture();
220 Standard_EXPORT Handle(OpenGl_Texture) EnableTexture (const Handle(OpenGl_Texture)& theTexture,
221 const Handle(Graphic3d_TextureParams)& theParams = NULL);
222 const Handle(OpenGl_Texture)& ActiveTexture() const { return myTextureBound; }
224 //! Set filter for restricting rendering of particular elements.
225 //! Filter can be applied for rendering passes used by recursive
226 //! rendering algorithms for rendering elements of groups.
227 //! @param theFilter [in] the filter instance.
228 inline void SetRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
230 myRenderFilter = theFilter;
233 //! Get rendering filter.
234 //! @return filter instance.
235 inline const Handle(OpenGl_RenderFilter)& GetRenderFilter() const
237 return myRenderFilter;
240 //! @return applied view matrix.
241 inline const OpenGl_Matrix* ViewMatrix() const { return ViewMatrix_applied; }
243 //! @return applied model structure matrix.
244 inline const OpenGl_Matrix* ModelMatrix() const { return StructureMatrix_applied; }
246 //! Sets and applies current polygon offset.
247 void SetPolygonOffset (int theMode, Standard_ShortReal theFactor, Standard_ShortReal theUnits);
249 //! Returns currently applied polygon offset params.
250 const TEL_POFFSET_PARAM& AppliedPolygonOffset() { return PolygonOffset_applied; }
252 //! @return true if clipping algorithm enabled
253 inline Standard_Boolean IsCullingEnabled() const { return myIsCullingEnabled; }
255 //! Returns a flag whether to redraw the scene using OpenGL rasterization
256 Standard_Boolean ToRedrawGL() const { return myToRedrawGL; }
260 //! Copy content of Back buffer to the Front buffer
261 void copyBackToFront();
263 virtual Standard_Boolean Activate();
265 void redraw1 (const Graphic3d_CView& theCView,
266 const Aspect_CLayer2d& theCUnderLayer,
267 const Aspect_CLayer2d& theCOverLayer,
268 const int theToSwap);
270 void updateMaterial (const int theFlag);
272 void setTextureParams (Handle(OpenGl_Texture)& theTexture,
273 const Handle(Graphic3d_TextureParams)& theParams);
277 //! Result of OpenGL shaders initialization.
278 enum RaytraceInitStatus
285 //! Describes update mode (state).
288 OpenGl_GUM_CHECK, //!< check if geometry update is necessary
289 OpenGl_GUM_PREPARE, //!< collect unchanged objects
290 OpenGl_GUM_UPDATE //!< update raytracing data, rebuild changed objects
293 //! Defines frequently used shader variables.
294 enum ShaderVariableIndex
306 OpenGl_RT_uUnviewMat,
310 OpenGl_RT_uLightAmbnt,
311 OpenGl_RT_uLightCount,
313 OpenGl_RT_uShadEnabled,
314 OpenGl_RT_uReflEnabled,
315 OpenGl_RT_uEnvMapEnable,
325 OpenGl_RT_NbVariables // special field
328 //! Defines texture samplers.
329 enum ShaderSamplerNames
331 OpenGl_RT_SceneNodeInfoTexture = 0,
332 OpenGl_RT_SceneMinPointTexture = 1,
333 OpenGl_RT_SceneMaxPointTexture = 2,
334 OpenGl_RT_SceneTransformTexture = 3,
336 OpenGl_RT_GeometryVertexTexture = 4,
337 OpenGl_RT_GeometryNormalTexture = 5,
338 OpenGl_RT_GeometryTexCrdTexture = 6,
339 OpenGl_RT_GeometryTriangTexture = 7,
341 OpenGl_RT_EnvironmentMapTexture = 8,
343 OpenGl_RT_RaytraceMaterialTexture = 9,
344 OpenGl_RT_RaytraceLightSrcTexture = 10,
346 OpenGl_RT_FSAAInputTexture = 11,
348 OpenGl_RT_OpenGlColorTexture = 12,
349 OpenGl_RT_OpenGlDepthTexture = 13
352 //! Tool class for management of shader sources.
357 //! Creates new uninitialized shader source.
363 //! Creates new shader source from specified file.
364 ShaderSource (const TCollection_AsciiString& theFileName)
366 Load (&theFileName, 1);
371 //! Returns prefix to insert before the source.
372 const TCollection_AsciiString& Prefix() const
377 //! Sets prefix to insert before the source.
378 void SetPrefix (const TCollection_AsciiString& thePrefix)
380 myPrefix = thePrefix;
383 //! Returns shader source combined with prefix.
384 TCollection_AsciiString Source() const;
386 //! Loads shader source from specified files.
387 void Load (const TCollection_AsciiString* theFileNames, const Standard_Integer theCount);
391 TCollection_AsciiString mySource; //!< Source string of the shader object
392 TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
396 //! Default ray-tracing depth.
397 static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
399 //! Default size of traversal stack.
400 static const Standard_Integer THE_DEFAULT_STACK_SIZE = 24;
402 //! Compile-time ray-tracing parameters.
403 struct RaytracingParams
405 //! Actual size of traversal stack in shader program.
406 Standard_Integer StackSize;
408 //! Actual ray-tracing depth (number of ray bounces).
409 Standard_Integer NbBounces;
411 //! Sets light propagation through transparent media.
412 Standard_Boolean TransparentShadows;
414 //! Creates default compile-time ray-tracing parameters.
416 : StackSize (THE_DEFAULT_STACK_SIZE),
417 NbBounces (THE_DEFAULT_NB_BOUNCES),
418 TransparentShadows (Standard_False)
424 protected: //! @name methods related to ray-tracing
426 //! Updates 3D scene geometry for ray-tracing.
427 Standard_Boolean UpdateRaytraceGeometry (GeomUpdateMode theMode);
429 //! Checks to see if the structure is modified.
430 Standard_Boolean CheckRaytraceStructure (const OpenGl_Structure* theStructure);
432 //! Creates ray-tracing material properties.
433 Standard_Boolean CreateMaterial (const OpenGl_AspectFace* theAspect, OpenGl_RaytraceMaterial& theMaterial);
435 //! Updates 3D scene light sources for ray-tracing.
436 Standard_Boolean UpdateRaytraceLightSources (const OpenGl_Mat4& theInvModelView);
438 //! Updates environment map for ray-tracing.
439 Standard_Boolean UpdateRaytraceEnvironmentMap();
441 //! Adds OpenGL structure to ray-traced scene geometry.
442 Standard_Boolean AddRaytraceStructure (const OpenGl_Structure* theStructure, std::set<const OpenGl_Structure*>& theElements);
444 //! Adds OpenGL groups to ray-traced scene geometry.
445 Standard_Boolean AddRaytraceGroups (const OpenGl_Structure* theStructure,
446 const Standard_Integer theStructMatId,
447 const Standard_ShortReal* theTransform);
449 //! Adds OpenGL primitive array to ray-traced scene geometry.
450 OpenGl_TriangleSet* AddRaytracePrimitiveArray (
451 const OpenGl_PrimitiveArray* theArray, int theMatID, const OpenGl_Mat4* theTrans);
453 //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
454 Standard_Boolean AddRaytraceVertexIndices (OpenGl_TriangleSet& theSet,
455 const OpenGl_PrimitiveArray& theArray,
456 Standard_Integer theOffset,
457 Standard_Integer theCount,
458 Standard_Integer theMatID);
460 //! Adds OpenGL triangle array to ray-traced scene geometry.
461 Standard_Boolean AddRaytraceTriangleArray (OpenGl_TriangleSet& theSet,
462 const Handle(Graphic3d_IndexBuffer)& theIndices,
463 Standard_Integer theOffset,
464 Standard_Integer theCount,
465 Standard_Integer theMatID);
467 //! Adds OpenGL triangle fan array to ray-traced scene geometry.
468 Standard_Boolean AddRaytraceTriangleFanArray (OpenGl_TriangleSet& theSet,
469 const Handle(Graphic3d_IndexBuffer)& theIndices,
470 Standard_Integer theOffset,
471 Standard_Integer theCount,
472 Standard_Integer theMatID);
474 //! Adds OpenGL triangle strip array to ray-traced scene geometry.
475 Standard_Boolean AddRaytraceTriangleStripArray (OpenGl_TriangleSet& theSet,
476 const Handle(Graphic3d_IndexBuffer)& theIndices,
477 Standard_Integer theOffset,
478 Standard_Integer theCount,
479 Standard_Integer theMatID);
481 //! Adds OpenGL quadrangle array to ray-traced scene geometry.
482 Standard_Boolean AddRaytraceQuadrangleArray (OpenGl_TriangleSet& theSet,
483 const Handle(Graphic3d_IndexBuffer)& theIndices,
484 Standard_Integer theOffset,
485 Standard_Integer theCount,
486 Standard_Integer theMatID);
488 //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
489 Standard_Boolean AddRaytraceQuadrangleStripArray (OpenGl_TriangleSet& theSet,
490 const Handle(Graphic3d_IndexBuffer)& theIndices,
491 Standard_Integer theOffset,
492 Standard_Integer theCount,
493 Standard_Integer theMatID);
495 //! Adds OpenGL polygon array to ray-traced scene geometry.
496 Standard_Boolean AddRaytracePolygonArray (OpenGl_TriangleSet& theSet,
497 const Handle(Graphic3d_IndexBuffer)& theIndices,
498 Standard_Integer theOffset,
499 Standard_Integer theCount,
500 Standard_Integer theMatID);
502 //! Loads and compiles shader object from specified source.
503 Handle(OpenGl_ShaderObject) LoadShader (const ShaderSource& theSource, GLenum theType);
505 //! Performs safe exit when shaders initialization fails.
506 Standard_Boolean SafeFailBack (const TCollection_ExtendedString& theMessage);
508 //! Generates shader prefix based on current ray-tracing options.
509 TCollection_AsciiString GenerateShaderPrefix();
511 //! Initializes OpenGL/GLSL shader programs.
512 Standard_Boolean InitRaytraceResources (const Graphic3d_CView& theCView);
514 //! Releases OpenGL/GLSL shader programs.
515 void ReleaseRaytraceResources();
517 //! Uploads ray-trace data to the GPU.
518 Standard_Boolean UploadRaytraceData();
520 //! Resizes OpenGL frame buffers.
521 Standard_Boolean ResizeRaytraceBuffers (const Standard_Integer theSizeX,
522 const Standard_Integer theSizeY);
524 //! Generates viewing rays for corners of screen quad.
525 void UpdateCamera (const OpenGl_Mat4& theOrientation,
526 const OpenGl_Mat4& theViewMapping,
527 OpenGl_Vec3 theOrigins[4],
528 OpenGl_Vec3 theDirects[4],
529 OpenGl_Mat4& theInvModelProj);
531 //! Sets uniform state for the given ray-tracing shader program.
532 Standard_Boolean SetUniformState (const Graphic3d_CView& theCView,
533 const Standard_Integer theSizeX,
534 const Standard_Integer theSizeY,
535 const OpenGl_Vec3* theOrigins,
536 const OpenGl_Vec3* theDirects,
537 const OpenGl_Mat4& theUnviewMat,
538 const Standard_Integer theProgramIndex,
539 Handle(OpenGl_ShaderProgram)& theRaytraceProgram);
541 //! Runs ray-tracing shader programs.
542 Standard_Boolean RunRaytraceShaders (const Graphic3d_CView& theCView,
543 const Standard_Integer theSizeX,
544 const Standard_Integer theSizeY,
545 const OpenGl_Vec3 theOrigins[4],
546 const OpenGl_Vec3 theDirects[4],
547 const OpenGl_Mat4& theUnviewMat,
548 OpenGl_FrameBuffer* theFrameBuffer);
550 //! Redraws the window using OpenGL/GLSL ray-tracing.
551 Standard_Boolean Raytrace (const Graphic3d_CView& theCView,
552 const Standard_Integer theSizeX,
553 const Standard_Integer theSizeY,
554 const Standard_Boolean theToSwap,
555 const Aspect_CLayer2d& theCOverLayer,
556 const Aspect_CLayer2d& theCUnderLayer,
557 OpenGl_FrameBuffer* theFrameBuffer);
559 protected: //! @name fields related to ray-tracing
561 //! Result of shaders initialization.
562 RaytraceInitStatus myComputeInitStatus;
564 //! Is geometry data valid?
565 Standard_Boolean myIsRaytraceDataValid;
567 //! Warning about missing extension GL_ARB_bindless_texture has been displayed?
568 Standard_Boolean myIsRaytraceWarnTextures;
570 //! 3D scene geometry data for ray-tracing.
571 OpenGl_RaytraceGeometry myRaytraceGeometry;
573 //! Radius of bounding sphere of the scene.
574 Standard_ShortReal myRaytraceSceneRadius;
575 //! Scene epsilon to prevent self-intersections.
576 Standard_ShortReal myRaytraceSceneEpsilon;
578 //! Compile-time ray-tracing parameters.
579 RaytracingParams myRaytraceParameters;
581 //! OpenGL/GLSL source of ray-tracing fragment shader.
582 ShaderSource myRaytraceShaderSource;
583 //! OpenGL/GLSL source of adaptive-AA fragment shader.
584 ShaderSource myPostFSAAShaderSource;
586 //! OpenGL/GLSL ray-tracing fragment shader.
587 Handle(OpenGl_ShaderObject) myRaytraceShader;
588 //! OpenGL/GLSL adaptive-AA fragment shader.
589 Handle(OpenGl_ShaderObject) myPostFSAAShader;
591 //! OpenGL/GLSL ray-tracing shader program.
592 Handle(OpenGl_ShaderProgram) myRaytraceProgram;
593 //! OpenGL/GLSL adaptive-AA shader program.
594 Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
596 //! Texture buffer of data records of bottom-level BVH nodes.
597 Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
598 //! Texture buffer of minimum points of bottom-level BVH nodes.
599 Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
600 //! Texture buffer of maximum points of bottom-level BVH nodes.
601 Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
602 //! Texture buffer of transformations of high-level BVH nodes.
603 Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
605 //! Texture buffer of vertex coords.
606 Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
607 //! Texture buffer of vertex normals.
608 Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
609 //! Texture buffer of vertex UV coords.
610 Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
611 //! Texture buffer of triangle indices.
612 Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
614 //! Texture buffer of material properties.
615 Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
616 //! Texture buffer of light source properties.
617 Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
619 //! Vertex buffer (VBO) for drawing dummy quad.
620 OpenGl_VertexBuffer myRaytraceScreenQuad;
622 //! Framebuffer (FBO) to perform adaptive FSAA.
623 Handle(OpenGl_FrameBuffer) myRaytraceFBO1;
624 //! Framebuffer (FBO) to perform adaptive FSAA.
625 Handle(OpenGl_FrameBuffer) myRaytraceFBO2;
626 //! Framebuffer (FBO) for pre-raytrace rendering by OpenGL.
627 Handle(OpenGl_FrameBuffer) myOpenGlFBO;
629 //! State of OpenGL view.
630 Standard_Size myViewModificationStatus;
631 //! State of OpenGL layer list.
632 Standard_Size myLayersModificationStatus;
634 //! State of OpenGL structures reflected to ray-tracing.
635 std::map<const OpenGl_Structure*, Standard_Size> myStructureStates;
637 //! PrimitiveArray to TriangleSet map for scene partial update.
638 std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
640 //! Cached locations of frequently used uniform variables.
641 Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
643 //! Graphical ray-tracing filter to filter out all raytracable structures.
644 Handle(OpenGl_RaytraceFilter) myRaytraceFilter;
646 //! Redraw the scene using OpenGL rasterization or ray-tracing?
647 Standard_Boolean myToRedrawGL;
649 protected: //! @name protected fields
651 Handle(OpenGl_PrinterContext) myPrintContext;
652 Handle(OpenGl_View) myView;
653 Handle(OpenGl_LineAttributes) myLineAttribs;
654 Standard_Integer myAntiAliasingMode;
655 Standard_Boolean myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
656 Standard_Boolean myBackBufferRestored;
657 Standard_Boolean myIsImmediateDrawn; //!< flag indicates that immediate mode buffer contains some data
658 Standard_Boolean myUseZBuffer;
659 Standard_Boolean myUseDepthTest;
660 Standard_Boolean myUseGLLight;
661 Standard_Boolean myIsCullingEnabled; //!< frustum culling flag
663 unsigned int myFrameCounter; //!< redraw counter, for debugging
665 protected: //! @name fields related to status
667 Handle(OpenGl_RenderFilter) myRenderFilter;
668 Handle(OpenGl_Texture) myTextureBound; //!< currently bound texture (managed by OpenGl_AspectFace and OpenGl_View environment texture)
669 const OpenGl_AspectLine *AspectLine_set, *AspectLine_applied;
670 const OpenGl_AspectFace *AspectFace_set, *AspectFace_applied;
671 const OpenGl_AspectMarker *AspectMarker_set, *AspectMarker_applied;
672 const OpenGl_AspectText *AspectText_set, *AspectText_applied;
674 const OpenGl_TextParam *TextParam_set, *TextParam_applied;
676 const OpenGl_Matrix* ViewMatrix_applied;
677 const OpenGl_Matrix* StructureMatrix_applied;
679 OpenGl_Material myMatFront; //!< current front material state (cached to reduce GL context updates)
680 OpenGl_Material myMatBack; //!< current back material state
681 OpenGl_Material myMatTmp; //!< temporary variable
682 TelCullMode myCullingMode; //!< back face culling mode, applied from face aspect
684 OpenGl_Matrix myModelViewMatrix; //!< Model matrix with applied structure transformations
686 TEL_POFFSET_PARAM PolygonOffset_applied; //!< Currently applied polygon offset.
688 OpenGl_AspectFace myAspectFaceHl; //!< Hiddenline aspect
690 public: //! @name type definition
692 DEFINE_STANDARD_RTTI(OpenGl_Workspace)
693 DEFINE_STANDARD_ALLOC
697 #endif // _OpenGl_Workspace_Header