andras/fleeting-garden
andras/fleeting-garden
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Refactor

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This commit is contained in:
Andras Schmelczer 2023-04-29 21:18:40 +01:00
commit 99e1923066
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GPG key ID: FC8F2C3D3D1A718C
6 changed files with 47 additions and 33 deletions
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29
src/pipelines/agents/agent.wgsl
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@ -1,6 +1,8 @@
struct Agent {
position: vec2<f32>,
angle: f32,
species: f32,
timeToLive: f32
}
struct Settings {
@ -30,7 +32,7 @@ fn main(@builtin(global_invocation_id) global_id : vec3<u32>) {
var agent = agents[id];
let random = f32(hash(id + u32(settings.time * 10000 + agent.position.y * 10 + agent.position.x))) / 4294967295.0;
let random = random(id + u32(settings.time * 10000 + agent.position.y * 10 + agent.position.x));
let weightForward : f32 = sense(agent, 0.);
let weightLeft : f32 = sense(agent, settings.sensorAngle);
@ -54,28 +56,27 @@ fn main(@builtin(global_invocation_id) global_id : vec3<u32>) {
textureStore(
TrailMapOut,
vec2<i32>(newPos * settings.size),
vec4(vec3<f32>(1.) * settings.trailWeight * 0.02, 1.)
vec4(1)
);
agent.position = newPos;
agents[id] = agent;
}
fn hash(state0 : u32) -> u32 {
// Hash function www.cs.ubc.ca/~rbridson/docs/schechter-sca08-turbulence.pdf
var state : u32 = state0;
state = state ^ 2747636419u;
state = state * 2654435769u;
state = state ^ (state >> 16u);
state = state * 2654435769u;
state = state ^ (state >> 16u);
state = state * 2654435769u;
return state;
}
fn sense(agent : Agent, sensorAngleOffset : f32) -> f32 {
let sensorAngle : f32 = agent.angle + sensorAngleOffset;
let sensorDir : vec2<f32> = vec2(cos(sensorAngle), sin(sensorAngle)) / normalize(settings.size);
let sensorPos : vec2<f32> = agent.position + sensorDir * settings.sensorOffsetDst;
return textureLoad(TrailMapIn, vec2<i32>(sensorPos * settings.size), 0).x;
}
fn random(state0 : u32) -> f32 {
var state : u32 = state0;
state = state ^ 2747636419u;
state = state * 2654435769u;
state = state ^ (state >> 16u);
state = state * 2654435769u;
state = state ^ (state >> 16u);
state = state * 2654435769u;
return f32(state) / 4294967295.0;
}