Compute normals for a simplicial complex geometry based on faces/cells information.
npm install geom-normalsCompute normals for a simplicial complex geometry based on faces/cells information.
``bash`
npm install geom-normals
`js
import normals from "geom-normals";
import { plane } from "primitive-geometry";
const geometry = plane();
// Modify geometry.positions
// ...
// Recompute normals
normals(geometry.positions, geometry.cells, geometry.normals);
`
#### normals(positions, cells, [out]): normals
Parameters
- positions: TypedArray | Array | Array<[x, y, z]> – simplicial complex geometry positions (eg. new Float32Array([x, y, z, x, y, z, ...])/new Array(x, y, z, x, y, z, ...) or new Array([x, y, z], [x, y, z], ...))TypedArray | Array | Array<[x, y, z]>
- cells: – simplicial complex geometry cells (eg. new Uint32Array([a, b, c, a, b, c, ...])/new Array(a, b, c, a, b, c, ...) or new Array([a, b, c], [a, b, c], ...))TypedArray | Array | Array<[x, y, z]>
- out (optional): – simplicial complex geometry normals to write to (eg. new Float32Array([x, y, z, x, y, z, ...])/new Array(x, y, z, x, y, z, ...) or new Array([x, y, z], [x, y, z], ...))
Returns
- normals: TypedArray | Array | Array<[x, y, z]>` – The normals parameter array updated (or created) with per vertex computed normals.
_Note: If there are two vertices with the same position but different index there will be discontinuity (hard edge)_
MIT. See license file.