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@group(0) @binding(0) var smplr: sampler;
@group(0) @binding(1) var txt: texture_2d<f32>;
struct CommonUniforms {
resolution: vec2<f32>,
aspect_ratio: f32,
time: f32,
beat: f32,
audio_intensity: f32,
};
struct EffectParams {
offset_scale: f32,
angle: f32,
};
@group(0) @binding(2) var<uniform> common: CommonUniforms;
@group(0) @binding(3) var<uniform> params: EffectParams;
@vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> {
var pos = array<vec2<f32>, 3>(
vec2<f32>(-1, -1),
vec2<f32>(3, -1),
vec2<f32>(-1, 3)
);
return vec4<f32>(pos[i], 0.0, 1.0);
}
@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> {
let uv = p.xy / common.resolution;
// Compute offset magnitude and direction
let offset_mag = params.offset_scale * common.audio_intensity;
let offset_dir = vec2<f32>(cos(params.angle), sin(params.angle));
let offset = offset_mag * offset_dir;
// Sample RGB channels with chromatic aberration
let r = textureSample(txt, smplr, uv + offset).r;
let g = textureSample(txt, smplr, uv).g;
let b = textureSample(txt, smplr, uv - offset).b;
return vec4<f32>(r, g, b, 1.0);
}
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