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SoInterpolate.h
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23
24#ifndef COIN_SOINTERPOLATE_H
25#define COIN_SOINTERPOLATE_H
26
27
28#include <Inventor/engines/SoSubEngine.h>
29#include <Inventor/engines/SoEngineOutput.h>
30#include <Inventor/fields/SoSFFloat.h>
31
32class COIN_DLL_API SoInterpolate : public SoEngine {
33 typedef SoEngine inherited;
34 SO_ENGINE_ABSTRACT_HEADER(SoInterpolate);
35
36public:
37 static void initClass(void);
38 static void initClasses(void);
39
41 SoEngineOutput output; // type varies for subclasses
42
43protected:
45 virtual ~SoInterpolate(void);
46};
47
48
49
51
52
53#define SO_INTERPOLATE_HEADER(_class_) \
54 SO_ENGINE_HEADER(_class_); \
55 public: \
56 _class_(); \
57 static void initClass(); \
58 protected: \
59 virtual ~_class_(); \
60 private: \
61 virtual void evaluate()
62
63
64#define PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_) \
65 SO_ENGINE_CONSTRUCTOR(_class_); \
66 SO_ENGINE_ADD_INPUT(alpha, (0.0f)); \
67 SO_ENGINE_ADD_INPUT(input0, _default0_); \
68 SO_ENGINE_ADD_INPUT(input1, _default1_); \
69 SO_ENGINE_ADD_OUTPUT(output, _type_)
70
71#define PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \
72_class_::~_class_() \
73{ \
74}
75
76#define PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_) \
77void \
78_class_::evaluate(void) \
79{ \
80 int n0 = this->input0.getNum(); \
81 int n1 = this->input1.getNum(); \
82 float a = this->alpha.getValue(); \
83 for (int i = SbMax(n0, n1) - 1; i >= 0; i--) { \
84 _valtype_ v0 = this->input0[SbMin(i, n0-1)]; \
85 _valtype_ v1 = this->input1[SbMin(i, n1-1)]; \
86 SO_ENGINE_OUTPUT(output, _type_, set1Value(i, _interpexp_)); \
87 } \
88}
89
90
91// Considering the number of lines of code needed to implement
92// the evaluate() method in each class, I'm amazed it is defined in
93// a macro and not simply implemented for each class. But, I guess
94// we'll have to supply this macro to keep the OIV compatibility,
95// so here it is. Check the interpolator classes for examples on
96// how to use it.
97// pederb, 20000309
98//
99// There's another version of this macro for internal use in the
100// SoSubEngineP.h file, so match any changes you do here with that
101// macro also -- if applicable.
102//
103// mortene, 20000505
104
105#define SO_INTERPOLATE_SOURCE(_class_, _type_, _valtype_, _default0_, _default1_, _interpexp_) \
106 \
107SO_ENGINE_SOURCE(_class_); \
108 \
109_class_::_class_(void) \
110{ \
111 PRIVATE_SO_INTERPOLATE_CONSTRUCTOR(_class_, _type_, _valtype_, _default0_, _default1_); \
112 this->isBuiltIn = FALSE; \
113} \
114 \
115PRIVATE_SO_INTERPOLATE_DESTRUCTOR(_class_) \
116PRIVATE_SO_INTERPOLATE_EVALUATE(_class_, _type_, _valtype_, _interpexp_)
117
118
119#define SO_INTERPOLATE_INITCLASS(_class_, _classname_) \
120 \
121void \
122_class_::initClass(void) \
123{ \
124 SO_ENGINE_INIT_CLASS(_class_, SoInterpolate, "SoInterpolate"); \
125}
126
127
129
130
131#ifndef COIN_INTERNAL
132// Include these header files for better Open Inventor compatibility.
133#include <Inventor/engines/SoInterpolateFloat.h>
134#include <Inventor/engines/SoInterpolateVec2f.h>
135#include <Inventor/engines/SoInterpolateVec3f.h>
136#include <Inventor/engines/SoInterpolateVec4f.h>
137#include <Inventor/engines/SoInterpolateRotation.h>
138#endif // !COIN_INTERNAL
139
140
141#endif // !COIN_SOINTERPOLATE_H
The SoEngineOutput class is the output slots in SoEngine instances.
Definition SoEngineOutput.h:36
SoEngine is the base class for Coin engines.
Definition SoEngine.h:34
static void initClasses(void)
Definition SoEngine.cpp:163
The SoInterpolate class is the base class for all interpolator engines.
Definition SoInterpolate.h:32
SoEngineOutput output
Definition SoInterpolate.h:41
SoSFFloat alpha
Definition SoInterpolate.h:40
The SoSFFloat class is a container for a floating point value.
Definition SoSFFloat.h:30

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