assimp/tools/assimp_view/AnimEvaluator.h

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/** Calculates a pose for a given time of an animation */
/*
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Open Asset Import Library (assimp)
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*/
#ifndef AV_ANIMEVALUATOR_H_INCLUDED
#define AV_ANIMEVALUATOR_H_INCLUDED
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#include <tuple>
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#include <vector>
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namespace AssimpView {
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/**
* @brief Calculates transformations for a given timestamp from a set of animation tracks. Not directly useful,
* better use the AnimPlayer class.
*/
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class AnimEvaluator {
public:
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/// @brief Constructor on a given animation. The animation is fixed throughout the lifetime of
/// the object.
/// @param pAnim The animation to calculate poses for. Ownership of the animation object stays
/// at the caller, the evaluator just keeps a reference to it as long as it persists.
AnimEvaluator(const aiAnimation *pAnim);
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/// @brief The class destructor.
~AnimEvaluator();
/** Evaluates the animation tracks for a given time stamp. The calculated pose can be retrieved as a
* array of transformation matrices afterwards by calling GetTransformations().
* @param pTime The time for which you want to evaluate the animation, in seconds. Will be mapped into the animation cycle, so
* it can be an arbitrary value. Best use with ever-increasing time stamps.
*/
void Evaluate(double pTime);
/** Returns the transform matrices calculated at the last Evaluate() call. The array matches the mChannels array of
* the aiAnimation. */
const std::vector<aiMatrix4x4> &GetTransformations() const { return mTransforms; }
protected:
const aiAnimation *mAnim;
double mLastTime;
std::vector<std::tuple<unsigned int, unsigned int, unsigned int>> mLastPositions;
std::vector<aiMatrix4x4> mTransforms;
};
} // end of namespace AssimpView
#endif // AV_ANIMEVALUATOR_H_INCLUDED