[Q] How do I figure out the pixel aspect for a certain resolution display? I am rendering a picture to be displayed on a macII at 1024x768. Does anyone know the formula or is it device dependent?
Pixel aspect ratio depends both on the aspect ratio of the display device (your monitor) and the resolution that fits onto that screen. Most monitors use a 4 x 3 aspect ratio so that to achieve square 1:1 pixels, the resolution must also be 4:3. 1024 x 768 will achieve this as well as 640 x 480. The Amiga typically uses a non-square aspect ratio of about 1.2:1 such as 320 x 200, 640 x 400, 768 x 480, etc. So the pixel ratio can be found using...
(horiz res. / horiz display size) : (vert res. / vert display size) If your monitor has a 4:3 aspect, you should have 1:1 pixels.
Last Update: July 13, 1995