Question

I am writing a program that converts the screen mapped pixels to actual resolution. As an example on the screen the co-ordinates are from (0,0) [top left] to (1,1) [bottom right]. My computer monitor has the resolution of 1600×900. So i need a way to map (0,0) to (0X0) and (1,1) to (1600×900) as well as everything in between such as (0.56,0.7) to Whatever it translates to in resolution. Does anyone know a way to do this?

Answer 1

You just need to scale them like this:

To go from actual to co-ordinates:

x = x * actualmax/coordmax

so in your example, using a y-coordinate of 0.333

x = 0.333 * 900/1 = 300

To go from co-ordinates to actual:

x = x * coordmax/actualmax

so in your example, using a y-coordinate of 300

x = 300 * 1/900 = 0.333