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00005  * UNPUBLISHED -- Rights reserved under the copyright laws of the United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_SPHERE_
00052 #define  _SO_SPHERE_
00053 
00054 #include <Inventor/fields/SoSFFloat.h>
00055 #include <Inventor/nodes/SoShape.h>
00056 
00057 class SbProjection;
00058 
00060 //
00061 //  Class: SoSphere
00062 //
00063 //  Simple sphere. By default a sphere has radius 1 and is centered
00064 //  around the origin.
00065 //
00067 
00126 class  SoSphere : public SoShape {
00127 
00128   SO_NODE_HEADER(SoSphere);
00129 
00130  public:
00131   // Fields
00136   SoSFFloat           radius;
00137 
00141   SoSphere();
00142 
00143  private:
00144   virtual void        GLRender(SoGLRenderAction *action);
00145   virtual void        rayPick(SoRayPickAction *action);
00146   virtual void        getPrimitiveCount(SoGetPrimitiveCountAction *action);
00147 
00148   // Computes bounding box of sphere
00149   virtual void        computeBBox(SoAction *action, SbBox3f &box,
00150                                   SbVec3f &center);
00151 
00152  private:
00153   static void         initClass();
00154   static void         exitClass();
00155 
00156  private:
00157   // Generates triangles representing a sphere
00158   virtual void        generatePrimitives(SoAction *action);
00159 
00160   virtual ~SoSphere();
00161 
00162  private:
00163   // render the sphere
00164   void                GLRenderGeneric(SoGLRenderAction *action,
00165                                       SbBool sendNormals = TRUE, SbBool doTextures = FALSE);
00166 
00167   // Computes tesselation depth based on current complexity
00168   int                 computeDepth(SoAction *action);
00169 
00174   void ouputGeneratePrimitiveTriangle(SbProjection* proj, SoPrimitiveVertex* vertices,
00175                                       bool counterClockwise);
00176 };
00177 
00178 #endif /* _SO_SPHERE_ */
00179 
00180 
00181
Inventor/nodes/SoSphere.h
