Of course, because we have the plane fixed at 1 unit in front of the camera, instead of moving that distance we have an adjusting factor that we multiple the co

Of course, because we have the plane fixed at 1 unit in front of the camera, instead of moving that distance we have an adjusting factor that we multiple the co-ordinates by to change our field of view. Thanks, I looked at scratchapixel but only found the stuff about how pinhole cameras work.