4d76f63e45
Also adds an example particle system that uses uniforms, and an instance of the particles GM that draws it. Change-Id: I64e2514fd17c8ce615b4e13b9f82424f80b8424e Reviewed-on: https://skia-review.googlesource.com/c/skia/+/356840 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: John Stiles <johnstiles@google.com>
32 lines
725 B
JSON
32 lines
725 B
JSON
{
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"MaxCount": 800,
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"Drawable": {
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"Type": "SkCircleDrawable",
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"Radius": 2
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},
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"Code": [
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"uniform float rate;",
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"uniform float spin;",
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"uniform float3 color;",
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"",
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"void effectSpawn(inout Effect effect) {",
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" effect.lifetime = 4;",
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"}",
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"",
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"void effectUpdate(inout Effect effect) {",
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" effect.rate = 100 * rate;",
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" effect.spin = spin;",
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"}",
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"",
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"void spawn(inout Particle p) {",
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" p.lifetime = 2 + rand(p.seed);",
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" p.vel = p.dir * mix(50, 60, rand(p.seed));",
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"}",
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"",
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"void update(inout Particle p) {",
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" p.color.rgb = color;",
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"}",
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""
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],
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"Bindings": []
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} |