jbich

06-17-2005, 06:08 AM

Hey all.

I'm trying to learn this crazy coordinate system thing, and a great example that would help me would be to figure out an equation that calculates a point in the viewport from a real-world number.

For example:

How do I find the bottom of the screen?

I know what the window size is, and what the z coord is. How would I translate that to a vector point?

So far I have this information:

Window Size: 640x400

z = -10

Point I'm trying to get to: 100% (of any direction within the viewport)

How would I translate that into a floating point vector of the top,right, etc. of the screen?

Thanks so much for any insight you can supply me!

j

I'm trying to learn this crazy coordinate system thing, and a great example that would help me would be to figure out an equation that calculates a point in the viewport from a real-world number.

For example:

How do I find the bottom of the screen?

I know what the window size is, and what the z coord is. How would I translate that to a vector point?

So far I have this information:

Window Size: 640x400

z = -10

Point I'm trying to get to: 100% (of any direction within the viewport)

How would I translate that into a floating point vector of the top,right, etc. of the screen?

Thanks so much for any insight you can supply me!

j