source/action.cpp

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