00001 /*=======================================================================
00002  * Copyright 1991-1996, Silicon Graphics, Inc.
00003  * ALL RIGHTS RESERVED
00004  *
00005  * UNPUBLISHED -- Rights reserved under the copyright laws of the United
00006  * States.   Use of a copyright notice is precautionary only and does not
00007  * imply publication or disclosure.
00008  *
00009  * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND:
00010  * Use, duplication or disclosure by the Government is subject to restrictions
00011  * as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights
00012  * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
00013  * in similar or successor clauses in the FAR, or the DOD or NASA FAR
00014  * Supplement.  Contractor/manufacturer is Silicon Graphics, Inc.,
00015  * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
00016  *
00017  * THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY
00018  * INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION,
00019  * DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY
00020  * PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON
00021  * GRAPHICS, INC.
00022 **=======================================================================*/
00023 /*=======================================================================
00024 ** Author      : Dave Immel (MMM yyyy)
00025 **=======================================================================*/
00026 /*=======================================================================
00027  *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
00028  ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
00029  ***                                                                                ***
00030  ***  REPRODUCTION, DISCLOSURE,  OR USE,  IN WHOLE OR IN PART,  OTHER THAN AS       ***
00031  ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
00032  ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
00033  ***                                                                                ***
00034  ***                        RESTRICTED RIGHTS LEGEND                                ***
00035  ***  USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS      ***
00036  ***  WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN      ***
00037  ***  SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT      ***
00038  ***  CLAUSE  AT FAR 52.227-19  OR SUBPARAGRAPH  (C)(1)(II)  OF  THE RIGHTS IN      ***
00039  ***  TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013.             ***
00040  ***                                                                                ***
00041  ***                   COPYRIGHT (C) 1996-2020 BY FEI S.A.S,                        ***
00042  ***                        BORDEAUX, FRANCE                                        ***
00043  ***                      ALL RIGHTS RESERVED                                       ***
00044 **=======================================================================*/
00045 /*=======================================================================
00046 ** Modified by : VSG (MMM YYYY)
00047 **=======================================================================*/
00048 
00049 
00050 #ifndef  _SO_INDEXED_NURBS_SURFACE_
00051 #define  _SO_INDEXED_NURBS_SURFACE_
00052 
00053 #include <Inventor/fields/SoSFInt32.h>
00054 #include <Inventor/fields/SoMFFloat.h>
00055 #include <Inventor/fields/SoMFInt32.h>
00056 #include <Inventor/nodes/SoShape.h>
00057 #include <Inventor/nodes/SoNurbsGroup.h>
00058 #include <Inventor/threads/SbThreadLocalStorage.h>
00059 #include <Inventor/caches/SoVBOMgr.h>
00060 
00061 class SoState;
00062 class SoIndexedNurbsSurfaceCache;
00063 class SoNurbsBREPAction;
00064 class SoBrep;
00065 class Pquad_tess_param;
00066 class GLUnurbs;
00067 class SbThreadRWMutex;
00068 
00162 class  SoIndexedNurbsSurface : public SoShape {
00163   
00164   SO_NODE_HEADER(SoIndexedNurbsSurface);
00165   
00166  public:
00170   SoSFInt32 numUControlPoints;
00171 
00175   SoSFInt32 numVControlPoints;
00176 
00180   SoMFInt32 coordIndex;
00181 
00185   SoMFFloat uKnotVector;
00186 
00190   SoMFFloat vKnotVector;
00191 
00195   SoSFInt32 numSControlPoints;
00196 
00200   SoSFInt32 numTControlPoints;
00201 
00205   SoMFInt32 textureCoordIndex;
00206 
00210   SoMFFloat sKnotVector;
00211 
00215   SoMFFloat tKnotVector;
00216 
00220   SoIndexedNurbsSurface();
00221 
00222  private:
00223   virtual void GLRender(SoGLRenderAction *action);
00224   virtual void rayPick(SoRayPickAction *action);
00225   virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action);
00226   virtual void getBoundingBox(SoGetBoundingBoxAction *action);
00227 
00228   // Computes bounding box of surface
00229   virtual void computeBBox(SoAction *action, SbBox3f &box, SbVec3f &center);
00230 
00231 
00232  private:
00233   static void initClass();
00234   static void exitClass();
00235 
00236   void invalidateCache();
00237   SoIndexedNurbsSurfaceCache *getNurbsCache() const { return nurbsCache; }
00238 
00239  private:
00240   // Generates triangles representing surface
00241   virtual void generatePrimitives(SoAction *action);
00242 
00243   float setTesselationParams(SoAction* action,
00244     const SoNurbsGroup::NurbsProperty &nurbsProperty,
00245     int steps,
00246     Pquad_tess_param &quad_tess_param);
00247 
00248   ~SoIndexedNurbsSurface();
00249 
00250  private:
00251   SoIndexedNurbsSurfaceCache *nurbsCache;
00252 
00253   SbThreadRWMutex       *nurbsCacheMutex;
00254 
00255   int isValid(SoState *state, SbBool renderAction);
00256 
00257   // Tessellate the surface
00258   void tesselateNURBS_G5G(SoAction *action,
00259                           SbBool doTextures,
00260                           int32_t steps,
00261                           SoBrep *brep,
00262                           SoNurbsGroup::NurbsProperty &nurbsProperty);
00263   void tesselateNURBS_G5G(SoAction *action, SbBool doTextures, int32_t steps);
00264 
00265   // Renders the surface
00266   void drawNURBS_G5G(SoAction *action, SbBool doTextures, int32_t steps);
00267 
00268   // Renders the surface
00269   void drawNURBS_GLU(GLUnurbs *nurbsObj, SoState *state, SbBool doTextures);
00270 
00271   // Functions to compute complexity from Complexity
00272   // and decimation elements
00273   int computeSteps(SoState *state);
00274   int computePixelTolerance(SoState *state);
00275   int computeScreenSpaceSteps(SoState *state);
00276 
00277   void createNurbsCache(SoState *state, SbBool isShadered);
00278 
00279   // VBO management
00280   inline SoVBOMgr     *getVBOMgr() const
00281   { return (SoVBOMgr*)(m_VBOMgr.getValue()); }
00282   SoVBOMgr* allocateVBO(SoState* state);
00283   void deleteVBO(SoState *state);
00284 
00285   SbThreadStorage<SoVBOMgr*> m_VBOMgr;
00286 };
00287 
00288 #endif /* _SO_INDEXED_NURBS_SURFACE_ */
00289 
00290
Inventor/nodes/SoIndexedNurbsSurface.h
