What is the monitor aspect ratio formula as in what are the exact steps and how does it vary from ratio to ratio without going over my head please?
I have one formula at least...
1200 / 1600 x 400 = 300 4:3 (400:300=4:3)
The problem for me is trying to figure out what to multiply by as you can't get the correct numbers by multiplying by 400 each time.
I'm interested in this as I'm curious about the various aspect ratios people use so I'd trying to implement this in to my custom statistics script. I figured it would be more appropriate to post it in the hardware section as it's the actual formula (determining the multiplier to be specific) and not an issue of code for me.
Aspect ratios are not always easy numbers. With the older screen resolutions like 640x480, 800x600 or 1280x1024 it was almost always easy to find a small value for the aspect ratio like 4:3 or 5:4. With the new wide screen displays, especially on notebooks you will sometimes find weird values.
What you have to find is the greatest common divisor [en.wikipedia.org] for the horizontal and vertical pixel sizes. I have two monitors here. The easiest example is my desktop screen which is a 19" 1280 x 1024 version:
1280 x 1024 = 2*2*2*2*2*2*5 x 2*2*2*2*2*2*2*2
The greatest common divisor is 2*2*2*2*2*2, which is 256 and gives an aspect ratio of 5:4.
But some screen sizes are more difficult. My other current screen is a wide screen notebook screen with the size 1366 x 768.
1366 x 768 = 2*683 x 2*2*2*2*2*2*2*2*3
683 is not dividable by 2 or 3. The greatest common divisor of these two screensizes is therefore 2, which gives an aspect ratio of 683:384.