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00002 * Copyright 1991-1996, Silicon Graphics, Inc. 00003 * ALL RIGHTS RESERVED 00004 * 00005 * UNPUBLISHED -- Rights reserved under the copyright laws of the United 00006 * States.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 : Ronen Barzel (MMM yyyy) 00025 ** Modified by : Gavin Bell (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_GATE_ 00052 #define _SO_GATE_ 00053 00054 #include <Inventor/SoDB.h> 00055 #include <Inventor/engines/SoSubEngine.h> 00056 #include <Inventor/fields/SoSFBool.h> 00057 #include <Inventor/fields/SoSFName.h> 00058 #include <Inventor/fields/SoSFTrigger.h> 00059 00061 // 00062 // Class: SoGate 00063 // 00064 // Gate engine class. A gate engine copies its input to its output, 00065 // when the "enable" field is true. It will also do a one-time copy 00066 // when the trigger field is touched. 00067 // 00069 00070 00112 class SoGate : public SoEngine { 00113 00114 SO_ENGINE_HEADER(SoGate); 00115 00116 public: 00120 SoGate(SoType mfInputType); 00121 00125 SoSFBool enable; 00129 SoSFTrigger trigger; 00130 00134 SoMField *input; 00135 00139 SoEngineOutput *output; 00140 00141 private: 00142 static void initClass(); 00143 static void exitClass(); 00144 00145 // Copies an instance that is encountered through a field connection 00146 virtual SoFieldContainer *copyThroughConnection() const; 00147 00148 private: 00149 ~SoGate(); 00150 virtual void inputChanged(SoField *whichInput); 00151 00152 // Copies the contents of the given node into this instance 00153 virtual void copyContents(const SoFieldContainer *fromFC, 00154 SbBool copyConnections); 00155 00157 virtual void evaluate(); 00158 00159 private: 00160 SoGate(); 00161 00162 // gate engines must write out their input type before writing 00163 // their fields, so these are overridden: 00164 virtual SbBool readInstance(SoInput *in, unsigned short flags); 00165 virtual void writeInstance(SoOutput *out); 00166 00167 void setup(SoType); 00168 00169 int conversionCase; 00170 00171 SoFieldData *myInputData; 00172 SoEngineOutputData *myOutputData; 00173 00174 SoSFName typeField; // Used when reading/writing 00175 }; 00176 00177 #endif /* _SO_GATE_ */ 00178 00179