| { |
| "MaxCount": 4096, |
| "Duration": 1, |
| "Rate": 30, |
| "Drawable": { |
| "Type": "SkCircleDrawable", |
| "Radius": 1 |
| }, |
| "Spawn": [ |
| "// float rand; Every read returns a random float [0 .. 1)", |
| "layout(ctype=float) in uniform float dt;", |
| "layout(ctype=float) in uniform float effectAge;", |
| "", |
| "struct Particle {", |
| " float age;", |
| " float lifetime;", |
| " float2 pos;", |
| " float2 dir;", |
| " float scale;", |
| " float2 vel;", |
| " float spin;", |
| " float4 color;", |
| " float frame;", |
| "};", |
| "", |
| "void main(inout Particle p) {", |
| " p.lifetime = 10;", |
| " p.vel.y = 10 + rand * 20;", |
| " p.vel.x = -5 + 10 * rand;", |
| " p.pos.x = rand * 500;", |
| "}", |
| "" |
| ], |
| "Update": [ |
| "// float rand; Every read returns a random float [0 .. 1)", |
| "layout(ctype=float) in uniform float dt;", |
| "layout(ctype=float) in uniform float effectAge;", |
| "", |
| "struct Particle {", |
| " float age;", |
| " float lifetime;", |
| " float2 pos;", |
| " float2 dir;", |
| " float scale;", |
| " float2 vel;", |
| " float spin;", |
| " float4 color;", |
| " float frame;", |
| "};", |
| "", |
| "void main(inout Particle p) {", |
| " p.scale = size(p.age);", |
| "}", |
| "" |
| ], |
| "Bindings": [ |
| { |
| "Type": "SkCurveBinding", |
| "Name": "size", |
| "Curve": { |
| "XValues": [], |
| "Segments": [ |
| { |
| "Type": "Cubic", |
| "Ranged": true, |
| "Bidirectional": false, |
| "A0": 10, |
| "B0": 10, |
| "C0": 10, |
| "D0": 0, |
| "A1": 10, |
| "B1": 0, |
| "C1": 0, |
| "D1": 0 |
| } |
| ] |
| } |
| } |
| ] |
| } |