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         struct UniformInfo
  77         {
  78                 std::string name;
  79                 unsigned size;
  80
  81                 UniformInfo(const std::string &, unsigned);
  82         };
  83
  84 public:
  85         class Iterator
  86         {
  87         private:
  88                 const Animation *animation;
  89                 std::vector<TimedKeyFrame>::const_iterator iter;
  90                 Time::TimeDelta time_since_keyframe;
  91                 bool end;
  92
  93         public:
  94                 Iterator(const Animation &);
  95
  96                 Iterator &operator+=(const Time::TimeDelta &);
  97
  98                 bool is_end() const { return end; }
  99                 Matrix get_matrix() const;
 100                 KeyFrame::AnimatedUniform get_uniform(unsigned) const;
 101                 Matrix get_pose_matrix(unsigned) const;
 102         };
 103
 104 private:
 105         const Armature *armature;
 106         std::vector<TimedKeyFrame> keyframes;
 107         bool looping;
 108         std::vector<UniformInfo> uniforms;
 109
 110 public:
 111         Animation();
 112         ~Animation();
 113
 114         void set_armature(const Armature &);
 115         const Armature *get_armature() const { return armature; }
 116
 117         unsigned get_n_uniforms() const { return uniforms.size(); }
 118         unsigned get_slot_for_uniform(const std::string &) const;
 119         const std::string &get_uniform_name(unsigned) const;
 120
 121         void add_keyframe(const Time::TimeDelta &, const KeyFrame &);
 122 private:
 123         void prepare_keyframe(TimedKeyFrame &);
 124
 125 public:
 126         void set_looping(bool);
 127 };
 128
 129 } // namespace GL
 130 } // namespace Msp
 131
 132 #endif