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SoInterpolate.h

00001 /**************************************************************************\ 00002 * 00003 * This file is part of the Coin 3D visualization library. 00004 * Copyright (C) 1998-2003 by Systems in Motion. All rights reserved. 00005 * 00006 * This library is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public License 00008 * version 2.1 as published by the Free Software Foundation. See the 00009 * file LICENSE.LGPL at the root directory of the distribution for 00010 * more details. 00011 * 00012 * If you want to use Coin for applications not compatible with the 00013 * LGPL, please contact SIM to acquire a Professional Edition license. 00014 * 00015 * Systems in Motion, Teknobyen, Abels Gate 5, 7030 Trondheim, NORWAY 00016 * http://www.sim.no support@sim.no Voice: +47 22114160 Fax: +47 22207097 00017 * 00018 \**************************************************************************/ 00019 00020 #ifndef COIN_SOINTERPOLATE_H 00021 #define COIN_SOINTERPOLATE_H 00022 00023 00024 #include <Inventor/engines/SoSubEngine.h> 00025 #include <Inventor/engines/SoEngineOutput.h> 00026 #include <Inventor/fields/SoSFFloat.h> 00027 00028 class COIN_DLL_API SoInterpolate : public SoEngine { 00029 typedef SoEngine inherited; 00030 SO_ENGINE_ABSTRACT_HEADER(SoInterpolate); 00031 00032 public: 00033 static void initClass(void); 00034 static void initClasses(void); 00035 00036 SoSFFloat alpha; 00037 SoEngineOutput output; // type varies for subclasses 00038 00039 protected: 00040 SoInterpolate(); 00041 virtual ~SoInterpolate(); 00042 }; 00043 00044 00045 00047 00048 00049 #define SO_INTERPOLATE_HEADER(_class_) \ 00050 SO_ENGINE_HEADER(_class_); \ 00051 public: \ 00052 _class_(); \ 00053 static void initClass(); \ 00054 protected: \ 00055 virtual ~_class_(); \ 00056 private: \ 00057 virtual void evaluate() 00058 00059 00060 #define PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_) \ 00061 SO_ENGINE_CONSTRUCTOR(_class_); \ 00062 SO_ENGINE_ADD_INPUT(alpha, (0.0f)); \ 00063 SO_ENGINE_ADD_INPUT(input0, _default0_); \ 00064 SO_ENGINE_ADD_INPUT(input1, _default1_); \ 00065 SO_ENGINE_ADD_OUTPUT(output, _type_) 00066 00067 #define PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \ 00068 _class_::~_class_() \ 00069 { \ 00070 } 00071 00072 #define PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_) \ 00073 void \ 00074 _class_::evaluate(void) \ 00075 { \ 00076 int n0 = this->input0.getNum(); \ 00077 int n1 = this->input1.getNum(); \ 00078 float a = this->alpha.getValue(); \ 00079 for (int i = SbMax(n0, n1) - 1; i >= 0; i--) { \ 00080 _valtype_ v0 = this->input0[SbMin(i, n0-1)]; \ 00081 _valtype_ v1 = this->input1[SbMin(i, n1-1)]; \ 00082 SO_ENGINE_OUTPUT(output, _type_, set1Value(i, _interpexp_)); \ 00083 } \ 00084 } 00085 00086 00087 // Considering the number of lines of code needed to implement 00088 // the evaluate() method in each class, I'm amazed it is defined in 00089 // a macro and not simply implemented for each class. But, I guess 00090 // we'll have to supply this macro to keep the OIV compatibility, 00091 // so here it is. Check the interpolator classes for examples on 00092 // how to use it. 00093 // pederb, 20000309 00094 // 00095 // There's another version of this macro for internal use in the 00096 // SoSubEngineP.h file, so match any changes you do here with that 00097 // macro also -- if applicable. 00098 // 00099 // mortene, 20000505 00100 00101 #define SO_INTERPOLATE_SOURCE(_class_, _type_, _valtype_, _default0_, _default1_, _interpexp_) \ 00102 \ 00103 SO_ENGINE_SOURCE(_class_); \ 00104 \ 00105 _class_::_class_(void) \ 00106 { \ 00107 PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_); \ 00108 this->isBuiltIn = FALSE; \ 00109 } \ 00110 \ 00111 PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \ 00112 PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_) 00113 00114 00115 #define SO_INTERPOLATE_INITCLASS(_class_, _classname_) \ 00116 \ 00117 void \ 00118 _class_::initClass(void) \ 00119 { \ 00120 SO_ENGINE_INIT_CLASS(_class_, SoInterpolate, "SoInterpolate"); \ 00121 } 00122 00123 00125 00126 00127 #ifndef COIN_INTERNAL 00128 // Include these header files for better Open Inventor compatibility. 00129 #include <Inventor/engines/SoInterpolateFloat.h> 00130 #include <Inventor/engines/SoInterpolateVec2f.h> 00131 #include <Inventor/engines/SoInterpolateVec3f.h> 00132 #include <Inventor/engines/SoInterpolateVec4f.h> 00133 #include <Inventor/engines/SoInterpolateRotation.h> 00134 #endif // !COIN_INTERNAL 00135 00136 00137 #endif // !COIN_SOINTERPOLATE_H

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