Function graphics::math::least_separation_4

pub fn least_separation_4<T>(sep1: Vec2d<T>,
                             sep2: Vec2d<T>,
                             sep3: Vec2d<T>,
                             sep4: Vec2d<T>)
                             -> Vec2d<T> where T: Float

Returns the least separation out of four. Each seperation can be computed using separation function. The separation returned can be used to solve collision of rectangles.