Ampandheaust
9768765d74
Provide the single-loadout Scene API, SAB-backed meshes, cameras, materials, lights, workers, post effects, and tutorial playgrounds. Batch matching row growth so active GPU loadouts refresh once. Amp-Thread-ID: https://ampcode.com/threads/T-01a01380-b478-77d0-84a0-102880a5c5ae Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
# Compute passes
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Compute shaders are graph data, not core code. Declare the shared rows/resources a shader needs and attach the pass to `Scene`.
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```ts
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const velocity = await scene.ensureRows("velocity", 4096, 16, "f32");
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const simulation = new ComputePass({
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id: "integrate",
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code: `
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@group(0) @binding(0)
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var<storage, read_write> velocity: array<vec4<f32>>;
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@compute @workgroup_size(64)
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fn main(@builtin(global_invocation_id) id: vec3<u32>) {
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if (id.x < arrayLength(&velocity)) {
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velocity[id.x].y -= 0.001;
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}
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}
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`,
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buffers: [{ id: "velocity", array: "velocity", usage: ["storage"] }],
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bindings: [{ group: 0, binding: 0, resource: "velocity" }],
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dispatch: [64, 1, 1],
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});
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await scene.addComputePass(simulation);
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```
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<Playground example="compute" />
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The graph DAG places an unqualified custom compute pass after light clustering and makes forward rendering depend on all custom compute passes. Use `after` to specify other dependencies.
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```ts
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await simulation.update({ dispatch: [128, 1, 1] });
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await scene.removeComputePass(simulation);
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```
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Both operations are infrequent graph/loadout messages. Existing source row changes are direct SAB writes.
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<script setup>
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import Playground from "../.vitepress/Playground.vue";
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</script>
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