Original Post
Hello I have gotten an assignement to do a simple refraction effect on a teapot Easy you say just use the refract(); function .. "BEEP" wrong i have to use a existing refraction calculation. http://gamedev.pastebin.com/m1ebdeeb2 the lines 67-77 is teh refraction calculation wich we throw mercifully into the arms of the evil Pixel shader, wich were im stuck atm. im suposed to see a disfigured image of whats behind the teapot but well its simply dosnt work. acording to the teach its just one small adjustment. but i have been staring at this bloody code for a week now and i need help. what have i done wrong ? here is the code with the reflection as well http://gamedev.pastebin.com/mf2671d2 please help me