Outputs

Kernel outputs tell Volten which bindings should be returned when you read a node.

const kernel = new Kernel(
    `
      fn main(gid: vec3u) {
        result[gid.x] = input[gid.x] * 2.0;
      }
    `,
    {
        outputs: ['result']
    }
);

Then read the node:

const node = v.pass(kernel, { input, result });
v.run(node);

const output = await v.read(node);
// { result: Float32Array [...] }

Output Names

The simplest form is an array of binding names.

const kernel = new Kernel(`...`, {
    outputs: ['result', 'debug']
});

Those names must match buffer-like bindings passed to v.pass().

const node = v.pass(kernel, {
    input,
    result,
    debug
});

In-Place Kernels

You do not need declared outputs for in-place work.

const kernel = new Kernel(`
  fn main(gid: vec3u) {
    data[gid.x] = data[gid.x] * 2.0;
  }
`);

const node = v.pass(kernel, { data });
v.run(node);

const result = await v.read(data);

If a kernel has no declared outputs, read the concrete buffer or handle directly.