View Full Version : Having trouble unprojecting an orthographic view

06-14-2014, 03:48 PM
For some odd reason, I'm not getting the right value when unprojecting an orthographic view but having no issue with perspective view. So the mouse value is +/-1 for the height and +/- ratio for the width with center being 0,0 and when unprojecting that postion I first project teh look at point at the center of the screen to get the projected z and fourth vertex value. I then multiply the x and y by that fourth vertex value, multiply it by the inverted projection matrix followed by the inverted model view. Is there something I'm missing? I know there's a lazy way to find the world position of the mouse but I'd rather find what I'm doing wrong. No matter what I set the ortho graphic view range as, (-100,100 or -1,1), I keep getting ~ +/-0.4 on the edges of the screen.