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TimeFade.H

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#ifndef TIMEFADE_H
#define TIMEFADE_H

#include "Color.H"

// Gluebase includes
#define OUTSIDE_GLUE_CORE
#include <std/time.H>


class TimeFade
{
 public:
  TimeFade(double startTime, Color startCol,
       double endTime, Color endCol) {
    _startTime = startTime;
    _startCol = startCol;
    _endTime = endTime;
    _endCol = endCol;
  }

  virtual ~TimeFade() {}

  Color getColor() {
    return getColor(the_time());
  }

  Color getColor(double t) {
    float f = (t - _startTime) / (_endTime - _startTime);
    if (f < 0.0) f = 0.0;
    else if (f > 1.0) f = 1.0;
    float f2 = 1.0 - f;
    float r = _startCol.r()*f2 + _endCol.r()*f;
    float g = _startCol.g()*f2 + _endCol.g()*f;
    float b = _startCol.b()*f2 + _endCol.b()*f;
    float a = _startCol.a()*f2 + _endCol.a()*f;
    return Color(r,g,b,a);
  }

 protected:

  double _startTime;
  Color  _startCol;
  double _endTime;
  Color  _endCol;

};

#endif

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