mirror of
https://github.com/photonstorm/phaser
synced 2024-12-18 09:03:29 +00:00
34 lines
907 B
TypeScript
34 lines
907 B
TypeScript
|
/// <reference path="../_definitions.ts" />
|
||
|
|
|
||
|
|
module Phaser.Particles {
|
||
|
|
|
||
|
|
export class NumericalIntegration {
|
||
|
|
|
||
|
|
constructor(type) {
|
||
|
|
this.type = ParticleUtils.initValue(type, ParticleManager.EULER);
|
||
|
|
}
|
||
|
|
|
||
|
|
type;
|
||
|
|
|
||
|
|
integrate(particles, time, damping) {
|
||
|
|
this.eulerIntegrate(particles, time, damping);
|
||
|
|
}
|
||
|
|
|
||
|
|
eulerIntegrate(particle, time, damping) {
|
||
|
|
if (!particle.sleep)
|
||
|
|
{
|
||
|
|
particle.old.p.copy(particle.p);
|
||
|
|
particle.old.v.copy(particle.v);
|
||
|
|
particle.a.multiplyScalar(1 / particle.mass);
|
||
|
|
particle.v.add(particle.a.multiplyScalar(time));
|
||
|
|
particle.p.add(particle.old.v.multiplyScalar(time));
|
||
|
|
if (damping)
|
||
|
|
particle.v.multiplyScalar(damping);
|
||
|
|
particle.a.clear();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|