I have multiple input devices and I want to create a cursor for each one. I'm given x and y coordinates, and I want to draw it on the screen.
How do I calculate the x,y when using glTranslatef?
views:
117answers:
1
+1
A:
I'm pretty sure, unless im suffering from a major mind failure, it goes as follows:
float fX = ((float)(x * 2) / (float)screenWidth) - 1.0f)
float fY = ((float)(-y * 2) / (float)screenHeight) - 1.0f)
Goz
2009-10-06 13:56:42
hi yup it works :) thank you so muchalthough it should befloat fY = (((float)(y * 2) / (float)screenHeight) - 1.0f)*-1.0f;
PCBEEF
2009-10-08 01:34:11
yeah fair enough .. I had a feeling i was getting the reverse on the y-axis wrong :)
Goz
2009-10-08 06:53:31