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20 lines
558 B
Dart
20 lines
558 B
Dart
part of game;
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class ActionCircularMove extends ActionInterval {
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ActionCircularMove(this.setter, this.center, this.radius, this.startAngle, this.clockWise, double duration) : super (duration);
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final Function setter;
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final Point center;
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final double radius;
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final double startAngle;
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final bool clockWise;
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void update(double t) {
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if (!clockWise) t = -t;
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double rad = radians(startAngle + t * 360.0);
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Offset offset = new Offset(math.cos(rad) * radius, math.sin(rad) * radius);
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Point pos = center + offset;
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setter(pos);
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}
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}
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