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particle emitters store and reuse particles

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This commit is contained in:
John Alanbrook 2024-07-23 08:40:20 -05:00
parent 9d51858266
commit 531cc1b43e
1 changed files with 15 additions and 2 deletions
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17
scripts/particle.js
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@ -46,7 +46,18 @@ emitter.die_hook = std_die;
emitter.spawn = function(t) emitter.spawn = function(t)
{ {
t ??= this.transform; t ??= this.transform;
var par = {
var par = this.dead.shift();
if (par) {
par.body.pos = t.pos;
par.transform.scale = [this.scale,this.scale,this.scale];
this.particles[par.id] = par;
par.time = 0;
this.spawn_hook(par);
return;
}
par = {
transform: os.make_transform(), transform: os.make_transform(),
life: this.life, life: this.life,
time: 0, time: 0,
@ -83,6 +94,7 @@ emitter.step = function(dt)
if (p.time >= p.life) { if (p.time >= p.life) {
this.die_hook(p); this.die_hook(p);
this.dead.push(this.particles[p.id]);
delete this.particles[p.id]; delete this.particles[p.id];
} }
} }
@ -97,7 +109,8 @@ var make_emitter = function()
var e = Object.create(emitter); var e = Object.create(emitter);
e.ssbo = render.make_textssbo(); e.ssbo = render.make_textssbo();
e.shape = shape.quad; e.shape = shape.quad;
e.shader = render.make_shader("shaders/baseparticle.cg"); e.shader = render.make_shader("shaders/baseparticle.cg");
e.dead = [];
return e; return e;
} }