Function push_rectangle_indices

pub fn push_rectangle_indices(
    ul: u32,
    ur: u32,
    dl: u32,
    dr: u32,
    out: &mut Vec<Point<u32>>,
)

Given four corner points, pushes to two counterclockwise triangles to out.

Arguments:

• ul - the up-left point.
• dl - the down-left point.
• dr - the down-left point.
• ur - the up-left point.