Given the 4 coordinates of a 2D shape in a 3D space I want to calculate its aspect ratio.
The 3D space is created with 2 vanishing points.
The 4 coordinates - marked blue - are the 2D coordinates on the display. in the example they should be roughly (14, 5.5), (19, 5), (20.3, 7.3), (25.3, 6).
I'm not sure if this is possible at all, if someone could find proof that for 2 different aspect ratios the 2D coordinates are the same this problem would be unsolvable.