resources/particles/interp.json

{
   "MaxCount": 6000,
   "Duration": 5,
   "Rate": 2000,
   "Life": {
      "Input": {
         "Source": "Age",
         "TileMode": "Repeat",
         "Left": 0,
         "Right": 1
      },
      "XValues": [],
      "Segments": [
         {
            "Type": "Constant",
            "Ranged": true,
            "Bidirectional": false,
            "A0": 2,
            "A1": 4
         }
      ]
   },
   "Drawable": {
      "Type": "SkCircleDrawable",
      "Radius": 2
   },
   "Spawn": [
      {
         "Type": "SkInterpreterAffector",
         "Enabled": true,
         "Code": "// float rand;\nlayout(ctype=float) in uniform float dt;\nlayout(ctype=float) in uniform float effectAge;\n\nvoid main(in    float age,\n          in    float invLifetime,\n          inout float2 pos,\n          inout float2 dir,\n          inout float  scale,\n          inout float2 vel,\n          inout float  spin,\n          inout float4 color) {\n  vel.x = 50 + (30 * rand);\n  vel.y = (rand * 20) - 10;\n}\n"
      }
   ],
   "Update": [
      {
         "Type": "SkInterpreterAffector",
         "Enabled": true,
         "Code": "// float rand;\nlayout(ctype=float) in uniform float dt;\nlayout(ctype=float) in uniform float effectAge;\n\nvoid main(in    float age,\n          in    float invLifetime,\n          inout float2 pos,\n          inout float2 dir,\n          inout float  scale,\n          inout float2 vel,\n          inout float  spin,\n          inout float4 color) {\n  color.r = age;\n  color.g = 1 - age;\n\n  float s1 = 0.5 + (1.5 * age);\n  float s2 = 1.0 + (-0.75 * age);\n  scale = s1 + (s2 - s1) * rand;\n\n  vel.y += 20.0 * dt;\n}\n"
      }
   ]
}