placementPoint

A position prop in the shape's own coordinates, so you can compare it with the field.

placementPoint(params: GpuFragmentParams, position: Expr, hint: string = 'placed'): Expr

Import materials from shaders/std and use materials.placementPoint.

Takes a transformPosition prop and applies the same center, scale and rotation the shape has. Distances from it are in placement units, not canvas units.

Parameters

Example

const lightUV = placementPoint(params, params.uniforms.lightPosition)

See also

• pointLightFrom — A point light as seen from a point on the shape: the 3D light vector L, the 2D direction toLight and the distance.
• nearestEdge — The closest point on the shape's edge to this pixel, and the outward normal there.

Used by

Irradiance