source/action.cpp

   1 #include "action.h"
   2
   3 namespace Msp {
   4 namespace DemoScene {
   5
   6 InterpolationAction::InterpolationAction(Mode m):
   7         mode(m),
   8         start_beat(0),
   9         duration(0)
  10 { }
  11
  12 void InterpolationAction::start(float b, float d)
  13 {
  14         start_beat = b;
  15         duration = d;
  16         interpolate(0.0f, 0.0f);
  17 }
  18
  19 void InterpolationAction::tick(float b, float d)
  20 {
  21         if(duration)
  22         {
  23                 float t = (b-start_beat)/duration;
  24                 float dt = d/duration;
  25                 if(mode==HERMITE)
  26                 {
  27                         dt = t-dt;
  28                         t = (3-2*t)*t*t;
  29                         dt = t-(3-2*dt)*dt*dt;
  30                 }
  31                 interpolate(t, dt);
  32         }
  33         else
  34                 interpolate(1.0f, 1.0f);
  35 }
  36
  37 void InterpolationAction::end(float)
  38 {
  39         interpolate(1.0f, 0.0f);
  40 }
  41
  42
  43 Action::Loader::Loader(Action &a, Demo &d):
  44         DataFile::ObjectLoader<Action>(a),
  45         demo(d)
  46 { }
  47
  48 } // namespace DemoScene
  49 } // namespace Msp