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Fixes anchor points for particles in particle systems

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This commit is contained in:
Viktor Lidholt 2015-07-30 16:04:57 -07:00
parent 7a386db1ee
commit a27edc402c
1 changed files with 9 additions and 5 deletions
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14
sky/packages/sky/example/game/lib/particle_system.dart
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@ -300,6 +300,10 @@ class ParticleSystem extends Node {
_paint.setTransferMode(transferMode);
for (_Particle particle in _particles) {
// Rect
Rect rect = texture.frame;
rects.add(rect);
// Transform
double scos;
double ssin;
@ -314,13 +318,13 @@ class ParticleSystem extends Node {
scos = particle.size;
ssin = 0.0;
}
RSTransform transform = new RSTransform(scos, ssin, particle.pos[0], particle.pos[1]);
double ax = rect.width / 2;
double ay = rect.height / 2;
double tx = particle.pos[0] + -scos * ax + ssin * ay;
double ty = particle.pos[1] + -ssin * ax - scos * ay;
RSTransform transform = new RSTransform(scos, ssin, tx, ty);
transforms.add(transform);
// Rect
Rect rect = texture.frame;
rects.add(rect);
// Color
if (particle.simpleColorSequence != null) {
Color particleColor = new Color.fromARGB(