resources/particles/spiral.json

{
   "MaxCount": 800,
   "Drawable": {
      "Type": "SkCircleDrawable",
      "Radius": 2
   },
   "EffectCode": [
      "void effectSpawn(inout Effect effect) {",
      "  effect.lifetime = 4;",
      "  effect.rate = 120;",
      "  effect.spin = 6;",
      "}",
      ""
   ],
   "Code": [
      "void spawn(inout Particle p) {",
      "  p.lifetime = 2 + rand;",
      "  p.vel = p.dir * mix(50, 60, rand);",
      "}",
      "",
      "void update(inout Particle p) {",
      "  p.scale = 0.5 + 1.5 * p.age;",
      "  float3 a0 = float3(0.098, 0.141, 0.784);",
      "  float3 a1 = float3(0.525, 0.886, 0.980);",
      "  float3 b0 = float3(0.376, 0.121, 0.705);",
      "  float3 b1 = float3(0.933, 0.227, 0.953);",
      "  p.color.rgb = mix(mix(a0, a1, p.age), mix(b0, b1, p.age), rand);",
      "}",
      ""
   ],
   "Bindings": []
}