emitFrom()

function emitFrom(shape: Live<EmissionShape>): SamplerFn<Vec3>;

Creates a sampler for particle positions spread across an area.

The shape is Live: pass a function to make the follow something that changes, for example the window width. It’s read again for every particle that spawns.

Parameters

shapeLive<EmissionShape>

The area to spawn particles from.

Returns

SamplerFn<Vec3>

A sampler for ParticleInit.position.

Example

// Along a line across the full width of the window.
const positionSampler = emitFrom(() => ({
    type: "rect",
    width: window.innerWidth,
    height: 0,
}));