# Aspect 2D Positioning

Does aspect2D change linearly as you move away from the center? I’m doing some math to place an image at a specific place on the screen and I’m getting some odd results. I know the x and y pixel locations of where I want to place the center of the image, but when I convert them to a2d’s coordinate space, it doesn’t seem like the coordinates are spaced linearly. As a result, I can’t place the images exactly where I want them. Here’s what I’m doing:

``````        diff = Settings.WIDTH - Settings.HEIGHT
xOff = 0
yOff = 0
if(diff > 0):
xOff = diff / 2
else:
yOff = diff / 2

centerX = Settings.WIDTH / 2
centerY = Settings.HEIGHT / 2

newX = (x - centerX) / (centerX - xOff)
newY = (centerY - y) / (centerY - yOff)``````

Here’s a picture to show what I’m doing:

img528.imageshack.us/img528/7765/temphv.png

I’m essentially computing the ratio of the pixel coordinates to the coordinates of a2d. I’m not quite sure why this math doesn’t work. any advice would be appreciated.

EDIT:

Looks like the math is fine, but my x & y parameters are not what I thought they were. I’ll leave the thread in case anyone is every looking for the math.