Unwrapping.GeneratePerTriangleUV

public static Vector2[] GeneratePerTriangleUV(Mesh src);

Parameters

src

The source mesh to generate UVs for.

Vector2[] The list of UVs generated.

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

You'll need to merge them yourself.

public static Vector2[] GeneratePerTriangleUV(Mesh src, UnwrapParam settings);

src		The source mesh to generate UVs for.
settings		Allows you to specify custom parameters to control the unwrapping.

Vector2[] The list of UVs generated.

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

You'll need to merge them yourself.