When playing back content from my 3D camcorder, if you aren't wearing shutter glasses then the result is pretty blurry and bland looking. After putting on the glasses, the scene jumps to life. So while putting together a sample photo to promote how it works, I wanted to superimpose a better 2D image, and stretch it over the existing image of a screen in the photo. It had been awhile since I've done anything real with math, so I took a half hour and figured out a couple equations to do the mapping,...