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00002 * Copyright 1991-1996, Silicon Graphics, Inc. 00003 * ALL RIGHTS RESERVED 00004 * 00005 * UNPUBLISHED -- Rights reserved under the copyright laws of the United 00006 * States.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 : Paul S. Strauss (MMM yyyy) 00025 ** Modified by : Nick Thompson (MMM yyyy) 00026 **=======================================================================*/ 00027 /*======================================================================= 00028 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.), *** 00029 *** AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT. *** 00030 *** *** 00031 *** REPRODUCTION, DISCLOSURE, OR USE, IN WHOLE OR IN PART, OTHER THAN AS *** 00032 *** SPECIFIED IN THE LICENSE ARE NOT TO BE UNDERTAKEN EXCEPT WITH PRIOR *** 00033 *** WRITTEN AUTHORIZATION OF FEI S.A.S. *** 00034 *** *** 00035 *** RESTRICTED RIGHTS LEGEND *** 00036 *** USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS *** 00037 *** WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN *** 00038 *** SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT *** 00039 *** CLAUSE AT FAR 52.227-19 OR SUBPARAGRAPH (C)(1)(II) OF THE RIGHTS IN *** 00040 *** TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013. *** 00041 *** *** 00042 *** COPYRIGHT (C) 1996-2020 BY FEI S.A.S, *** 00043 *** BORDEAUX, FRANCE *** 00044 *** ALL RIGHTS RESERVED *** 00045 **=======================================================================*/ 00046 /*======================================================================= 00047 ** Modified by : VSG (MMM YYYY) 00048 **=======================================================================*/ 00049 00050 00051 #ifndef _SO_CONE_ 00052 #define _SO_CONE_ 00053 00054 #include <Inventor/SbLinear.h> 00055 #include <Inventor/fields/SoSFBitMask.h> 00056 #include <Inventor/fields/SoSFFloat.h> 00057 #include <Inventor/nodes/SoShape.h> 00058 00060 // 00061 // Class: SoCone 00062 // 00063 // Simple cone, aligned with y-axis. Default has apex point at y = 1, 00064 // bottom radius 1, and height 2, so that the size is -1 to +1 in all 00065 // 3 dimensions. There are two parts to the cone: the sides and the 00066 // bottom face (in that order). 00067 // 00069 00141 class SoCone : public SoShape { 00142 00143 SO_NODE_HEADER(SoCone); 00144 00145 public: 00146 00148 enum Part { 00152 SIDES = 0x01, 00156 BOTTOM = 0x02, 00160 ALL = 0x03 00161 }; 00162 00163 // Fields 00167 SoSFBitMask parts; 00171 SoSFFloat bottomRadius; 00175 SoSFFloat height; 00176 00180 SoCone(); 00181 00185 void addPart(SoCone::Part part); 00189 void removePart(SoCone::Part part); 00190 00194 SbBool hasPart(SoCone::Part part) const; 00195 00196 private: 00197 // Implements actions 00198 virtual void GLRender(SoGLRenderAction *action); 00199 virtual void rayPick(SoRayPickAction *action); 00200 virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action); 00201 00202 // Computes bounding box of cone 00203 virtual void computeBBox(SoAction *action, SbBox3f &box, 00204 SbVec3f ¢er); 00205 00206 private: 00207 static void initClass(); 00208 static void exitClass(); 00209 00210 SB_THREAD_TLS_HEADER(); 00211 00212 // Modified on 02-25-00: put from private to SoINTERNAL public for the bevel 00213 // Computes number of sides and sections to use to represent 00214 // cone (based on complexity), then computes ring of x,z 00215 // coordinates around base of cone and stores in baseCoords. It 00216 // computes and stores normals in sideNormals, too. 00217 void computeBase(SoAction *action, 00218 int &numSides, int &numSections, 00219 SbVec2f *&baseCoords, 00220 SbVec3f *&sideNormals) const ; 00221 00222 private: 00223 // Generates triangles representing a cone 00224 virtual void generatePrimitives(SoAction *action); 00225 00226 virtual ~SoCone(); 00227 00228 private: 00229 // Computes number of sides and sections to use, based on complexity 00230 // and decimation elements. 00231 void computeNumSidesSections(SoAction *action, 00232 int &numSides, int &numSections) const; 00233 00234 // Computes real radius and half-height 00235 void getSize(float &rad, float &hHeight) const; 00236 00237 // These render the cone 00238 void GLRenderGeneric(SoGLRenderAction *action, 00239 SbBool sendNormals, SbBool doTextures); 00240 void GLRenderNvertTnone(SoGLRenderAction *action); 00241 00242 // Computes intersection of ray with infinite canonical cone 00243 SbBool intersectInfiniteCone(const SbLine &ray, 00244 SbVec3f &enterPoint, 00245 SbVec3f &exitPoint) const; 00246 00247 // Thread static variables 00248 struct MTstruct { 00249 SbVec2f *coordsArray; // Ring x,z coordinates 00250 SbVec3f *normalsArray; // Ring normals 00251 int maxCoords; // Current size of arrays 00252 }; 00253 }; 00254 00255 #endif /* _SO_CONE_ */ 00256 00257