Legacy Documentation: Version 4.3.0
Unwrapping.GeneratePerTriangleUV
static function GeneratePerTriangleUV(src: Mesh): Vector2[];
Description

Will generate per-triangle uv (3 uv pairs for each triangle) with default settings.

You'll need to merge them yourself.
static function GeneratePerTriangleUV(src: Mesh, settings: UnwrapParam): Vector2[];
Description

Will generate per-triangle uv (3 uv pairs for each triangle) with provided settings.

You'll need to merge them yourself.