78 lines
2.2 KiB
Plaintext
78 lines
2.2 KiB
Plaintext
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//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_ANIMATIONPATH
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#define OSG_ANIMATIONPATH 1
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#include <osg/Matrix>
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#include <osg/Quat>
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#include <map>
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namespace osg {
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/** Animation Path for specify the time varying transformation pathway to use when update camera and model objects.
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*/
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class SG_EXPORT AnimationPath : public osg::Referenced
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{
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public:
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AnimationPath() {}
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virtual bool getMatrix(double time,Matrix& matrix);
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virtual bool getInverse(double time,Matrix& matrix);
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struct Key
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{
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Key() {}
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Key(const osg::Vec3& position, const osg::Quat& rotation, const osg::Vec3& scale):
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_position(position),
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_rotation(rotation),
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_scale(scale) {}
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osg::Vec3 _position;
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osg::Quat _rotation;
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osg::Vec3 _scale;
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inline void interpolate(const float ratio,const Key& first, const Key& second)
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{
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float one_minus_ratio = 1.0f-ratio;
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_position = first._position*one_minus_ratio + second._position*ratio;
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_rotation.slerp(ratio,first._rotation,second._rotation);
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_scale = first._scale*one_minus_ratio + second._scale*ratio;
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}
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inline void getMatrix(Matrix& matrix)
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{
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matrix.makeScale(_scale);
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matrix.postMult(_rotation.getMatrix());
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matrix.postMult(osg::Matrix::translate(_position));
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}
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inline void getInverse(Matrix& matrix)
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{
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matrix.makeScale(1.0f/_scale.x(),1.0f/_scale.y(),1.0f/_scale.y());
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matrix.postMult(_rotation.inverse().getMatrix());
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matrix.postMult(osg::Matrix::translate(-_position));
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}
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};
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void insert(double time,const Key& key);
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protected:
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virtual ~AnimationPath() {}
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typedef std::map<double,Key> TimeKeyMap;
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TimeKeyMap _timeKeyMap;
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};
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}
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#endif
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