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SoInterpolate.h

00001 /**************************************************************************\
00002  *
00003  *  This file is part of the Coin 3D visualization library.
00004  *  Copyright (C) 1998-2007 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 General Public License
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00009  *  See the file LICENSE.GPL at the root directory of this source
00010  *  distribution for additional information about the GNU GPL.
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00015  *  a Coin Professional Edition License.
00016  *
00017  *  See http://www.coin3d.org/ for more information.
00018  *
00019  *  Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY.
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00021  *
00022 \**************************************************************************/
00023 
00024 #ifndef COIN_SOINTERPOLATE_H
00025 #define COIN_SOINTERPOLATE_H
00026 
00027 
00028 #include <Inventor/engines/SoSubEngine.h>
00029 #include <Inventor/engines/SoEngineOutput.h>
00030 #include <Inventor/fields/SoSFFloat.h>
00031 
00032 class COIN_DLL_API SoInterpolate : public SoEngine {
00033   typedef SoEngine inherited;
00034   SO_ENGINE_ABSTRACT_HEADER(SoInterpolate);
00035 
00036 public:
00037   static void initClass(void);
00038   static void initClasses(void);
00039 
00040   SoSFFloat alpha;
00041   SoEngineOutput output; // type varies for subclasses
00042 
00043 protected:
00044   SoInterpolate();
00045   virtual ~SoInterpolate();
00046 };
00047 
00048 
00049 
00051 
00052 
00053 #define SO_INTERPOLATE_HEADER(_class_) \
00054   SO_ENGINE_HEADER(_class_); \
00055   public: \
00056     _class_(); \
00057     static void initClass(); \
00058   protected: \
00059     virtual ~_class_(); \
00060   private: \
00061     virtual void evaluate()
00062 
00063 
00064 #define PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_) \
00065   SO_ENGINE_CONSTRUCTOR(_class_); \
00066   SO_ENGINE_ADD_INPUT(alpha, (0.0f)); \
00067   SO_ENGINE_ADD_INPUT(input0, _default0_); \
00068   SO_ENGINE_ADD_INPUT(input1, _default1_); \
00069   SO_ENGINE_ADD_OUTPUT(output, _type_)
00070 
00071 #define PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \
00072 _class_::~_class_() \
00073 { \
00074 }
00075 
00076 #define PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_) \
00077 void \
00078 _class_::evaluate(void) \
00079 { \
00080   int n0 = this->input0.getNum(); \
00081   int n1 = this->input1.getNum(); \
00082   float a = this->alpha.getValue(); \
00083   for (int i = SbMax(n0, n1) - 1; i >= 0; i--) { \
00084     _valtype_ v0 = this->input0[SbMin(i, n0-1)]; \
00085     _valtype_ v1 = this->input1[SbMin(i, n1-1)]; \
00086     SO_ENGINE_OUTPUT(output, _type_, set1Value(i, _interpexp_)); \
00087   } \
00088 }
00089 
00090 
00091 // Considering the number of lines of code needed to implement
00092 // the evaluate() method in each class, I'm amazed it is defined in
00093 // a macro and not simply implemented for each class. But, I guess
00094 // we'll have to supply this macro to keep the OIV compatibility,
00095 // so here it is. Check the interpolator classes for examples on
00096 // how to use it.
00097 //                                               pederb, 20000309
00098 //
00099 // There's another version of this macro for internal use in the
00100 // SoSubEngineP.h file, so match any changes you do here with that
00101 // macro also -- if applicable.
00102 //
00103 //                                               mortene, 20000505
00104 
00105 #define SO_INTERPOLATE_SOURCE(_class_, _type_, _valtype_, _default0_, _default1_, _interpexp_) \
00106  \
00107 SO_ENGINE_SOURCE(_class_); \
00108  \
00109 _class_::_class_(void) \
00110 { \
00111   PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_); \
00112   this->isBuiltIn = FALSE; \
00113 } \
00114  \
00115 PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \
00116 PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_)
00117 
00118 
00119 #define SO_INTERPOLATE_INITCLASS(_class_, _classname_) \
00120  \
00121 void \
00122 _class_::initClass(void) \
00123 { \
00124   SO_ENGINE_INIT_CLASS(_class_, SoInterpolate, "SoInterpolate"); \
00125 }
00126 
00127 
00129 
00130 
00131 #ifndef COIN_INTERNAL
00132 // Include these header files for better Open Inventor compatibility.
00133 #include <Inventor/engines/SoInterpolateFloat.h>
00134 #include <Inventor/engines/SoInterpolateVec2f.h>
00135 #include <Inventor/engines/SoInterpolateVec3f.h>
00136 #include <Inventor/engines/SoInterpolateVec4f.h>
00137 #include <Inventor/engines/SoInterpolateRotation.h>
00138 #endif // !COIN_INTERNAL
00139 
00140 
00141 #endif // !COIN_SOINTERPOLATE_H

Copyright © 1998-2007 by Systems in Motion AS. All rights reserved.

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