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Andras Schmelczer 2023-04-29 22:42:52 +01:00
parent 42d87fc2a3
commit e3d0af56e2
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GPG key ID: FC8F2C3D3D1A718C
2 changed files with 23 additions and 4 deletions
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11
src/pipelines/diffusion/diffuse.wgsl
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@ -12,11 +12,13 @@ struct Settings {
@group(0) @binding(0) var<uniform> settings: Settings;
@group(0) @binding(1) var Sampler: sampler;
@group(0) @binding(2) var trailMap: texture_2d<f32>;
@group(0) @binding(3) var noise: texture_2d<f32>;
@fragment
fn fragment(@location(0) uv: vec2<f32>) -> @location(0) vec4<f32> {
var current = textureSample(trailMap, Sampler, uv);
let noise = textureSample(noise, Sampler, uv);
let neighbours: vec4<f32> = (
textureSample(trailMap, Sampler, uv + vec2<f32>(0, 1) / settings.size)
+ textureSample(trailMap, Sampler, uv + vec2<f32>(0, -1) / settings.size)
@ -27,14 +29,15 @@ fn fragment(@location(0) uv: vec2<f32>) -> @location(0) vec4<f32> {
let mixedTrails = mix(
current.rgb,
neighbours.rgb,
settings.diffusionRateTrails
settings.diffusionRateTrails + (noise.rgb - vec3(0.5)) * 0.1
) * (1.0 - settings.decayRateTrails);
let mixedBrush = mix(
current.a,
neighbours.a,
settings.diffusionRateBrush
) * (1.0 - settings.decayRateBrush);
settings.diffusionRateBrush + (noise.a - 0.5) * 0.5
) * (1.0 - settings.decayRateBrush - (noise.a - 0.5) * 0.1);
return clamp(vec4(mixedTrails, mixedBrush), vec4(0), vec4(1));
}