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 abstract base SoEXTENDER SoElement class. 00048 | 00049 | Classes: 00050 | SoElement 00051 | 00052 | Author(s) : Paul S. Strauss 00053 | 00054 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00055 _______________________________________________________________________ 00056 */ 00057 00058 #ifndef _SO_ELEMENT 00059 #define _SO_ELEMENT 00060 00061 #include <Inventor/system/SbSystem.h> 00089 00090 #include <Inventor/SoType.h> 00091 #include <Inventor/misc/SoState.h> 00092 #include <Inventor/nodes/SoNode.h> 00093 00094 class SoTypeList; 00095 00096 SoEXTENDER class INVENTOR_API SoElement { 00097 00098 public: 00101 virtual void init(SoState *state); 00102 00105 virtual void push(SoState *state); 00106 virtual void pop(SoState *state, const SoElement *prevTopElement); 00107 00109 virtual void print(FILE *fp) const; 00110 00114 virtual SbBool matches(const SoElement *elt) const = 0; 00115 00118 virtual SoElement *copyMatchInfo() const = 0; 00119 00121 static SoType getClassTypeId() { return classTypeId; } 00122 00124 SoType getTypeId() const { return typeId; } 00125 00126 SoINTERNAL public: 00128 static void initElements(); 00129 00131 static void initClass(); 00132 00134 static int getNumStackIndices() { return nextStackIndex; } 00135 00137 static SoType getIdFromStackIndex(int stackIndex); 00138 00140 int getStackIndex() const { return stackIndex; } 00141 00143 void setDepth(int dpth) { depth = dpth; } 00144 void setNext(SoElement *nxt) { next = nxt; } 00145 void setNextInStack(SoElement *nxt) { nextInStack = nxt; } 00146 void setNextFree(SoElement *nxt) { nextFree = nxt; } 00147 00149 int getDepth() const { return depth; } 00150 SoElement * getNext() const { return next; } 00151 00153 virtual ~SoElement(); 00154 00155 protected: 00157 SoElement(); 00158 00162 static SoElement * getElement(SoState *state, int stackIndex) 00163 { return state->getElement(stackIndex); } 00164 00167 static inline const SoElement * getConstElement(SoState *state, 00168 int stackIndex); 00169 00173 void capture(SoState *state) const 00174 { if (state->isCacheOpen()) captureThis(state); } 00175 00178 virtual void captureThis(SoState *state) const; 00179 00181 void setTypeId(SoType id) { typeId = id; } 00182 00184 void setStackIndex(int index) { stackIndex = index; } 00185 00187 SoElement * getNextInStack() const { return nextInStack; } 00188 00190 SoElement * getNextFree() const { return nextFree; } 00191 00192 SoINTERNAL protected: 00193 static int classStackIndex; 00194 00196 static int createStackIndex(SoType id); 00197 00198 private: 00200 static SoType classTypeId; 00201 SoType typeId; 00202 00204 static int nextStackIndex; 00205 static SoTypeList *stackToType; 00206 int stackIndex; 00207 00209 00216 00217 SoElement *nextInStack; 00218 SoElement *nextFree; 00219 00220 SoElement *next; 00221 00222 int depth; 00223 friend class SoState; 00224 }; 00225 00233 00234 inline const SoElement *SoElement::getConstElement(SoState *state, 00235 int stackIndex) 00238 { 00239 const SoElement * elt = (state->getConstElement(stackIndex)); 00240 elt->capture(state); 00241 return elt; 00242 } 00243 00244 #endif /* _SO_ELEMENT */