You may also attempt to solve it yourself as a mathematical
exercise. Using your own senses, you can see that the
illustration is a 7x7 grid with three red squares on it it the
positions (3,4), (5,2), and (5,5) depending on how you define
your coordinate system. If this drawing were on the $xy$ plane
and your camera is on the $z$-axis at a height $h$ and pointing
at the origin point(0,0,0), with the $x$-axis horizontal and
$y$-axis vertical in your projective image, then what would the
camera see? Now think about how the camera views the image
looking at it from different positions. You will have to find
the six coordinates describing the camera: its position in
space, $x, y, z$ its orientation in space, however you choose to
define it Try to work out the problem. If you have trouble with
it, look at stackoverflow again. Or search for more pages about
projective transforms, coordinate transforms, 3-d rendering,
ray-tracing, or even the basics of OpenGL (open graphics
language) which will help you understand t