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Adding a rotate method to Position and a drawWhere method to utils

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Luan Nico
2017-12-30 21:59:45 -02:00
parent fbaec30724
commit 5eee726d92
2 changed files with 16 additions and 0 deletions
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8
lib/position.dart
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@ -22,4 +22,12 @@ class Position {
double length() {
return math.sqrt(math.pow(this.x, 2) + math.pow(this.y, 2));
}
Position rotate(double angle) {
double nx = math.cos(angle) * this.x - math.sin(angle) * this.y;
double ny = math.sin(angle) * this.x + math.cos(angle) * this.y;
this.x = nx;
this.y = ny;
return this;
}
}