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00002 * Copyright 1991-1996, Silicon Graphics, Inc. 00003 * ALL RIGHTS RESERVED 00004 * 00005 * UNPUBLISHED -- Rights reserved under the copyright laws of the United 00006 * States.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 : Gavin Bell (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_TRIANGLE_STRIP_SET_ 00051 #define _SO_INDEXED_TRIANGLE_STRIP_SET_ 00052 00053 #include <Inventor/nodes/SoIndexedShape.h> 00054 #include <Inventor/fields/SoSFNode.h> 00055 #include <Inventor/nodes/SoVertexProperty.h> 00056 #include <Inventor/nodes/SoSeparator.h> 00057 00058 class SoCoordinateElement; 00059 class SoVolumeIndexedTriangleStripSet; 00060 00062 // 00063 // Class: SoIndexedTriangleStripSet 00064 // 00065 // Indexed set of triangles strips. Strips are separated by the 00066 // special index SO_END_STRIP_INDEX (-1). The N indices in the strip 00067 // define N-2 triangles, which are formed by indexing into the 00068 // current coordinates. Depending on the current material and normal 00069 // binding values, the materials and normals for the triangles or 00070 // vertices may be accessed in order or indexed. If they are indexed, 00071 // the materialIndex and normalIndex fields are used. 00072 // 00074 00075 // This coordinate index indicates that the current triangle ends and the 00076 // next triangle begins 00077 #define SO_END_STRIP_INDEX (-1) 00078 00079 class SoNormalBundle; 00080 class SoCoordinateElement; 00081 00164 class SoIndexedTriangleStripSet : public SoIndexedShape { 00165 00166 SO_NODE_HEADER(SoIndexedTriangleStripSet); 00167 00168 00169 public: 00173 int getNumStrips(void){countStripsAndTris();return numStrips;}; 00174 00178 int getNumTriangles(void){countStripsAndTris();return numTriangles;}; 00179 00180 // Constructor 00184 SoIndexedTriangleStripSet(); 00185 00186 private: 00187 // Implements actions 00188 virtual void GLRender(SoGLRenderAction *action); 00189 00190 virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action); 00191 00192 // Generates default normals using the given normal bundle. 00193 virtual void generateDefaultNormals(SoState *state, 00194 const SbVec3f *coords, 00195 int numCoords, 00196 SoNormalBundle *nb, 00197 SbBool storeRef = FALSE); 00198 virtual int getNumNeededNormals(SoState *state); 00199 00200 private: 00201 static void initClass(); 00202 static void exitClass(); 00203 00204 private: 00205 // This enum is used to indicate the current material or normal binding 00206 enum Binding { 00207 OVERALL, 00208 PER_STRIP, PER_STRIP_INDEXED, 00209 PER_TRIANGLE, PER_TRIANGLE_INDEXED, 00210 PER_VERTEX, PER_VERTEX_INDEXED 00211 }; 00212 00213 // Generates triangles representing strips 00214 virtual void generatePrimitives(SoAction *action); 00215 00216 // count primitives 00217 virtual void countPrim(){countStripsAndTris();} 00218 00219 // return num strips for test 00220 virtual int getNumPrim(){return numStrips;} 00221 00222 // return num vertices for test 00223 virtual int getNumVert(); 00224 00225 virtual void callSetupIndices(const SoShapeStyleElement* shapeStyle,uint32_t useTexCoordsAnyway); 00226 00227 // invalid test 00228 virtual SbBool numPrimInvalid(){return numStrips < 0 ;} 00229 00230 // render function 00231 void doRendering(SoGLRenderAction *action, const SoShapeStyleElement* shapeStyle); 00232 00233 // Overrides standard method to create an SoFaceDetail instance 00234 virtual SoDetail * createTriangleDetail(SoRayPickAction *action, 00235 const SoPrimitiveVertex *v1, 00236 const SoPrimitiveVertex *v2, 00237 const SoPrimitiveVertex *v3, 00238 SoPickedPoint *pp); 00239 00240 ~SoIndexedTriangleStripSet(); 00241 00242 private: 00243 // Reset numVertices/numStrips when notified 00244 virtual void notify(SoNotList *list); 00245 00246 private: 00247 00248 // optimized normal generation when no creaseAngle is defined. 00249 void buildPerVertexNormals(SoState *state,const SbVec3f *coords, const int numCoords, SoNormalBundle *nb); 00250 00251 // optimized version of connectivity computation when tolerance factor is 0.0 00252 int32_t *buildConnectivity(const SbVec3f *coords, const int numCoords); 00253 00254 // Returns current material or normal binding from action's state 00255 static Binding getMaterialBinding(SoAction *action); 00256 Binding getNormalBinding(SoAction *action, SoNormalBundle *nb); 00257 00258 // Fill in numStrips, numTriangles and numVertices[] 00259 void countStripsAndTris(); 00260 00261 // Number of strips, total number of triangles, and number of 00262 // vertices per strip: 00263 int numStrips; 00264 int numTriangles; 00265 int * numVertices; 00266 00267 static const int AUTO_CACHE_ITSS_MIN_WITHOUT_VP; 00268 00269 static const int AUTO_CACHE_ITSS_MAX; 00270 }; 00271 00272 #endif /* _SO_INDEXED_TRIANGLE_STRIP_SET_ */ 00273 00274