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Use vector functions for scaling

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This commit is contained in:
Lukas Klingsbo
2020-09-21 21:52:22 +02:00
parent 4115afcebb
commit b4473584c4
1 changed files with 5 additions and 7 deletions
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12
lib/effects/scale_effect.dart
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@ -7,7 +7,7 @@ import '../extensions/vector2.dart';
import './effects.dart';
double _direction(double p, double d) => (p - d).sign;
double _size(double a, double b) => (a - b).abs();
double _length(double a, double b) => (a - b).abs();
class ScaleEffect extends PositionComponentEffect {
Vector2 size;
@ -36,14 +36,14 @@ class ScaleEffect extends PositionComponentEffect {
_original = component.toSize();
_diff = Vector2(
_size(_original.x, size.x),
_size(_original.y, size.y),
_length(_original.x, size.x),
_length(_original.y, size.y),
);
_dir.x = _direction(size.x, _original.x);
_dir.y = _direction(size.y, _original.y);
final scaleDistance = sqrt(pow(_diff.x, 2) + pow(_diff.y, 2));
final scaleDistance = _diff.length;
travelTime = scaleDistance / speed;
}
@ -51,8 +51,6 @@ class ScaleEffect extends PositionComponentEffect {
void update(double dt) {
super.update(dt);
final double c = curve?.transform(percentage) ?? 1.0;
component.width = _original.x + _diff.x * c * _dir.x;
component.height = _original.y + _diff.y * c * _dir.y;
component.setBySize(_original + (_diff.clone()..multiply(_dir)) * c);
}
}