Here's a cross-section (along the x==0 plane) of a simple 3D projection setup. The camera's aperture is centered at the origin, facing in the +z direction. It's looking at an object at coordinates (x,y,z), where x is zero and z is positive. The image is focused onto a film plane at z==-1, one unit away from the origin, where the image sits at coordinate Yw (Y in the film window).
The question is, what's the equation for Yw in terms of y and z? Please write the mathematical equation on a sheet of paper. Due in class on Tuesday, September 5th.