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.