|index||The index of the path to measure.|
You can use this function to get the exact length of a path in
pixels. this is not an approximate length from point to
point, but rather an exact length along the shape of the path, even
when the path is smooth with a high curved precision.
len = path_get_length(c_path);
This will set "len" to the total length of the path indexed in "c_path" in pixels.