Open Inventor Reference
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00001 /* 00002 * 00003 * Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved. 00004 * 00005 * This library is free software; you can redistribute it and/or 00006 * modify it under the terms of the GNU Lesser General Public 00007 * License as published by the Free Software Foundation; either 00008 * version 2.1 of the License, or (at your option) any later version. 00009 * 00010 * This library is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * Lesser General Public License for more details. 00014 * 00015 * Further, this software is distributed without any warranty that it is 00016 * free of the rightful claim of any third person regarding infringement 00017 * or the like. Any license provided herein, whether implied or 00018 * otherwise, applies only to this software file. Patent licenses, if 00019 * any, provided herein do not apply to combinations of this program with 00020 * other software, or any other product whatsoever. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with this library; if not, write to the Free Software 00024 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00025 * 00026 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 00027 * Mountain View, CA 94043, or: 00028 * 00029 * http://www.sgi.com 00030 * 00031 * For further information regarding this notice, see: 00032 * 00033 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 00034 * 00035 */ 00036 00037 00038 /* 00039 * Copyright (C) 1990,91 Silicon Graphics, Inc. 00040 * 00041 _______________________________________________________________________ 00042 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00043 | 00044 | $Revision: 1.1.1.1 $ 00045 | 00046 | Description: 00047 | This file defines the SoShape node class. 00048 | 00049 | Author(s) : Paul S. Strauss 00050 | 00051 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00052 _______________________________________________________________________ 00053 */ 00054 00055 #ifndef _SO_SHAPE_ 00056 #define _SO_SHAPE_ 00057 00058 #include <Inventor/SbLinear.h> 00059 #include <Inventor/nodes/SoSubNode.h> 00060 00061 #include <Inventor/system/SbOpenGLU.h> 00062 00063 class SoCube; 00064 class SoDetail; 00065 class SoFaceDetail; 00066 class SoMaterialBundle; 00067 class SoPickedPoint; 00068 class SoPointDetail; 00069 class SoPrimitiveVertex; 00070 class SoState; 00071 00072 00074 #ifndef gluTESSELATOR 00075 #if (defined(__glu_h__) || defined(GLU_H)) && defined(GLU_VERSION_1_2) 00076 #define gluTESSELATOR GLUtesselator 00077 #else 00078 #define gluTESSELATOR GLUtriangulatorObj 00079 extern "C" struct GLUtriangulatorObj; 00080 #endif 00081 #endif 00082 00083 00084 00087 00098 00099 00100 class INVENTOR_API SoShape : public SoNode { 00101 00102 SO_NODE_ABSTRACT_HEADER(SoShape); 00103 00104 public: 00106 virtual SbBool affectsState() const; 00107 00108 SoINTERNAL public: 00109 static void initClass(); 00110 00113 enum TriangleShape { 00114 TRIANGLE_STRIP, 00115 TRIANGLE_FAN, 00116 TRIANGLES, 00117 POLYGON 00118 }; 00119 00120 SoEXTENDER public: 00123 virtual void getBoundingBox(SoGetBoundingBoxAction *action); 00124 00127 virtual void GLRender(SoGLRenderAction *action); 00128 00132 virtual void rayPick(SoRayPickAction *action); 00133 00136 virtual void callback(SoCallbackAction *action); 00137 00142 static void getScreenSize(SoState *state, 00143 const SbBox3f &boundingBox, 00144 SbVec2s &rectSize); 00145 00151 virtual void computeBBox(SoAction *action, SbBox3f &box, 00152 SbVec3f ¢er) = 0; 00153 protected: 00154 00156 SoShape(); 00157 00161 virtual void generatePrimitives(SoAction *action) = 0; 00162 00166 virtual SbBool shouldGLRender(SoGLRenderAction *action); 00167 00170 SbBool shouldRayPick(SoRayPickAction *action); 00171 00176 void beginSolidShape(SoGLRenderAction *action); 00177 void endSolidShape(SoGLRenderAction *action); 00178 00185 void computeObjectSpaceRay(SoRayPickAction *action); 00186 void computeObjectSpaceRay(SoRayPickAction *action, 00187 const SbMatrix &matrix); 00188 00196 virtual SoDetail * createTriangleDetail(SoRayPickAction *action, 00197 const SoPrimitiveVertex *v1, 00198 const SoPrimitiveVertex *v2, 00199 const SoPrimitiveVertex *v3, 00200 SoPickedPoint *pp); 00201 virtual SoDetail * createLineSegmentDetail(SoRayPickAction *action, 00202 const SoPrimitiveVertex *v1, 00203 const SoPrimitiveVertex *v2, 00204 SoPickedPoint *pp); 00205 virtual SoDetail * createPointDetail(SoRayPickAction *action, 00206 const SoPrimitiveVertex *v, 00207 SoPickedPoint *pp); 00208 00215 void invokeTriangleCallbacks(SoAction *action, 00216 const SoPrimitiveVertex *v1, 00217 const SoPrimitiveVertex *v2, 00218 const SoPrimitiveVertex *v3); 00219 void invokeLineSegmentCallbacks(SoAction *action, 00220 const SoPrimitiveVertex *v1, 00221 const SoPrimitiveVertex *v2); 00222 void invokePointCallbacks(SoAction *action, 00223 const SoPrimitiveVertex *v); 00224 00245 void beginShape(SoAction *action, TriangleShape shapeType, 00246 SoFaceDetail *faceDetail = NULL); 00247 void shapeVertex(const SoPrimitiveVertex *v); 00248 void endShape(); 00249 00250 virtual ~SoShape(); 00251 00254 void GLRenderBoundingBox(SoGLRenderAction *action); 00255 00256 private: 00257 00262 static SoGetBoundingBoxAction *bboxAct; 00263 static SoCube *bboxCube; 00264 00268 static SbBool sendTexCoords; 00269 static SoMaterialBundle *matlBundle; 00270 00272 static TriangleShape primShapeType; 00273 static SoFaceDetail *faceDetail; 00274 static int nestLevel; 00275 static SoAction *primAction; 00276 static int primVertNum; 00277 static int polyVertNum; 00278 static SoShape *primShape; 00279 00282 static SoPrimitiveVertex *primVerts; 00283 static SoPointDetail *vertDetails; 00284 static SoPrimitiveVertex *polyVerts; 00285 static SoPointDetail *polyDetails; 00286 static int numPolyVertsAllocated; 00287 static GLUtriangulatorObj *tobj; 00288 00291 void GLRenderTriangle(SoGLRenderAction *action, 00292 const SoPrimitiveVertex *v1, 00293 const SoPrimitiveVertex *v2, 00294 const SoPrimitiveVertex *v3); 00295 void GLRenderLineSegment(SoGLRenderAction *action, 00296 const SoPrimitiveVertex *v1, 00297 const SoPrimitiveVertex *v2); 00298 void GLRenderPoint(SoGLRenderAction *action, 00299 const SoPrimitiveVertex *v); 00300 00303 void rayPickTriangle(SoRayPickAction *action, 00304 const SoPrimitiveVertex *v1, 00305 const SoPrimitiveVertex *v2, 00306 const SoPrimitiveVertex *v3); 00307 void rayPickLineSegment(SoRayPickAction *action, 00308 const SoPrimitiveVertex *v1, 00309 const SoPrimitiveVertex *v2); 00310 void rayPickPoint(SoRayPickAction *action, 00311 const SoPrimitiveVertex *v); 00312 00315 void rayPickBoundingBox(SoRayPickAction *action); 00316 00318 void triangleVertex(const SoPrimitiveVertex *v, 00319 int vertToReplace); 00320 00322 void allocateVerts(); 00323 00325 static void CALLBACK beginCB(GLenum primType); 00326 static void CALLBACK vtxCB(void *vertex); 00327 static void CALLBACK endCB(); 00328 static void CALLBACK errorCB(GLenum err); 00329 }; 00330 00331 #endif /* _SO_SHAPE_ */