Function calculateTangents

calculateTangents(positions, normals, uvs, indices): number[]
Generates tangent information from the specified positions, normals, texture coordinates and triangle indices.
Parameters
- positions: number[]
  An array of 3-dimensional vertex positions.
- normals: number[]
  An array of 3-dimensional vertex normals.
- uvs: number[]
  An array of 2-dimensional vertex texture coordinates.
- indices: number[]
  An array of triangle indices.
Returns number[]
An array of 3-dimensional vertex tangents.
Example
```
const tangents = pc.calculateTangents(positions, normals, uvs, indices);
```
- Defined in engine/src/scene/geometry/geometry-utils.js:83