flutter/flame
1
0
Fork 0
mirror of https://github.com/flame-engine/flame.git synced 2025-11-03 12:28:03 +08:00
Code Issues Packages Projects Releases Wiki Activity

Use vector functions for scaling

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

12
lib/effects/scale_effect.dart
View File

@ -7,7 +7,7 @@ import '../extensions/vector2.dart';
import './effects.dart'; import './effects.dart';
double _direction(double p, double d) => (p - d).sign; 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 { class ScaleEffect extends PositionComponentEffect {
Vector2 size; Vector2 size;
@ -36,14 +36,14 @@ class ScaleEffect extends PositionComponentEffect {
_original = component.toSize(); _original = component.toSize();
_diff = Vector2( _diff = Vector2(
_size(_original.x, size.x), _length(_original.x, size.x),
_size(_original.y, size.y), _length(_original.y, size.y),
); );
_dir.x = _direction(size.x, _original.x); _dir.x = _direction(size.x, _original.x);
_dir.y = _direction(size.y, _original.y); _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; travelTime = scaleDistance / speed;
} }
@ -51,8 +51,6 @@ class ScaleEffect extends PositionComponentEffect {
void update(double dt) { void update(double dt) {
super.update(dt); super.update(dt);
final double c = curve?.transform(percentage) ?? 1.0; final double c = curve?.transform(percentage) ?? 1.0;
component.setBySize(_original + (_diff.clone()..multiply(_dir)) * c);
component.width = _original.x + _diff.x * c * _dir.x;
component.height = _original.y + _diff.y * c * _dir.y;
} }
} }