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00002 * Copyright 1991-1996, Silicon Graphics, Inc. 00003 * ALL RIGHTS RESERVED 00004 * 00005 * UNPUBLISHED -- Rights reserved under the copyright laws of the United 00006 * States.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 **=======================================================================*/ 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_COMPUTE_BOUNDING_BOX_ 00051 #define _SO_COMPUTE_BOUNDING_BOX_ 00052 00053 #include <Inventor/SbViewportRegion.h> 00054 #include <Inventor/engines/SoSubEngine.h> 00055 #include <Inventor/fields/SoSFPath.h> 00056 #include <Inventor/fields/SoSFNode.h> 00057 #include <Inventor/fields/SoSFVec3f.h> 00058 00059 class SoGetBoundingBoxAction; 00060 00062 // 00063 // Class: SoComputeBoundingBox 00064 // 00065 // This engine has two input fields: "node" (SoSFNode) and "path" 00066 // (SoSFPath). By default, these fields contain NULL pointers. If the 00067 // "path" field is not NULL, this engine computes the bounding box 00068 // and center of the graph defined by the path, using an 00069 // SoGetBoundingBoxAction, and outputs the results. If the "path" 00070 // field is NULL but the "node" field isn't, it computes the bounding 00071 // box and center of the graph rooted by the node. 00072 // 00073 // If both the node and the path are NULL, the outputs are disabled. 00074 // 00075 // The "boxCenter" output is the center of the computed bounding box, 00076 // and the "objectCenter" output is the center defined by the objects 00077 // themselves, as returned by SoGetBoundingBoxAction::getCenter(). 00078 // 00079 // The engine uses a default viewport region when constructing the 00080 // SoGetBoundingBoxAction, so screen-based objects (such as 2D text) 00081 // may not be dealt with correctly. If this feature is needed, you 00082 // can call setViewportRegion() on an engine instance to set up the 00083 // correct viewport region to use. 00084 // 00086 00122 class SoComputeBoundingBox : public SoEngine { 00123 00124 SO_ENGINE_HEADER(SoComputeBoundingBox); 00125 00126 public: 00130 SoSFNode node; 00134 SoSFPath path; 00135 00139 SoEngineOutput min; 00143 SoEngineOutput max; 00147 SoEngineOutput boxCenter; 00151 SoEngineOutput objectCenter; 00152 00156 SoComputeBoundingBox(); 00157 00161 void setViewportRegion(const SbViewportRegion &vpReg); 00165 const SbViewportRegion &getViewportRegion() const; 00166 00167 private: 00168 static void initClass(); 00169 static void exitClass(); 00170 00171 private: 00172 // Indicates that an input has changed - we use this to determine 00173 // whether to use the node or path, or to disable output entirely 00174 virtual void inputChanged(SoField *whichInput); 00175 00176 // Evaluation method 00177 virtual void evaluate(); 00178 00179 // Destructor 00180 virtual ~SoComputeBoundingBox(); 00181 private: 00182 // Pointer to SoGetBoundingBoxAction 00183 SoGetBoundingBoxAction *bba; 00184 00185 // Each of these is TRUE if the corresponding input pointer is non-NULL 00186 SbBool gotNode; 00187 SbBool gotPath; 00188 }; 00189 00190 #endif /* _SO_COMPUTE_BOUNDING_BOX_ */ 00191 00192