source/animation.h

   1 #ifndef MSP_GL_ANIMATION_H_
   2 #define MSP_GL_ANIMATION_H_
   3
   4 #include <msp/core/refptr.h>
   5 #include <msp/datafile/objectloader.h>
   6 #include <msp/time/timedelta.h>
   7 #include "keyframe.h"
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 class Armature;
  13 class Matrix;
  14 class Pose;
  15
  16 /**
  17 An Animation is a sequence of KeyFrames combined with timing information.  The
  18 state at any point in the animation can be interpolated from the keyframes.
  19 */
  20 class Animation
  21 {
  22 public:
  23         class Loader: public DataFile::CollectionObjectLoader<Animation>
  24         {
  25         private:
  26                 Time::TimeDelta current_time;
  27
  28         public:
  29                 Loader(Animation &);
  30                 Loader(Animation &, Collection &);
  31         private:
  32                 void init();
  33
  34                 void keyframe(const std::string &);
  35                 void keyframe_inline();
  36                 void interval(float);
  37         };
  38
  39 private:
  40         struct AxisInterpolation
  41         {
  42                 float slope;
  43                 float scale;
  44
  45                 AxisInterpolation();
  46                 AxisInterpolation(const float *, const float *);
  47         };
  48
  49         struct MatrixInterpolation
  50         {
  51                 const Matrix *matrix1;
  52                 const Matrix *matrix2;
  53                 AxisInterpolation axes[3];
  54
  55                 MatrixInterpolation();
  56                 MatrixInterpolation(const Matrix &, const Matrix &);
  57
  58                 Matrix get(float) const;
  59         };
  60
  61         struct TimedKeyFrame
  62         {
  63                 const Animation &animation;
  64                 const TimedKeyFrame *prev;
  65                 Time::TimeDelta time;
  66                 Time::TimeDelta delta_t;
  67                 RefPtr<const KeyFrame> keyframe;
  68                 MatrixInterpolation matrix;
  69                 std::vector<KeyFrame::AnimatedUniform> uniforms;
  70                 std::vector<MatrixInterpolation> pose_matrices;
  71
  72                 TimedKeyFrame(const Animation &);
  73                 void prepare();
  74         };
  75
  76         typedef std::list<TimedKeyFrame> KeyFrameList;
  77
  78         struct UniformInfo
  79         {
  80                 std::string name;
  81                 unsigned size;
  82
  83                 UniformInfo(const std::string &, unsigned);
  84         };
  85
  86 public:
  87         class Iterator
  88         {
  89         private:
  90                 const Animation &animation;
  91                 KeyFrameList::const_iterator iter;
  92                 Time::TimeDelta time_since_keyframe;
  93                 bool end;
  94
  95         public:
  96                 Iterator(const Animation &);
  97
  98                 Iterator &operator+=(const Time::TimeDelta &);
  99
 100                 bool is_end() const { return end; }
 101                 Matrix get_matrix() const;
 102                 KeyFrame::AnimatedUniform get_uniform(unsigned) const;
 103                 Matrix get_pose_matrix(unsigned) const;
 104         };
 105
 106 private:
 107         const Armature *armature;
 108         KeyFrameList keyframes;
 109         bool looping;
 110         std::vector<UniformInfo> uniforms;
 111
 112 public:
 113         Animation();
 114         ~Animation();
 115
 116         void set_armature(const Armature &);
 117         const Armature *get_armature() const { return armature; }
 118
 119         unsigned get_n_uniforms() const { return uniforms.size(); }
 120         unsigned get_slot_for_uniform(const std::string &) const;
 121         const std::string &get_uniform_name(unsigned) const;
 122
 123         void add_keyframe(const Time::TimeDelta &, const KeyFrame &);
 124 private:
 125         void prepare_keyframe(TimedKeyFrame &);
 126
 127 public:
 128         void set_looping(bool);
 129 };
 130
 131 } // namespace GL
 132 } // namespace Msp
 133
 134 #endif