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How to do a render function?

Started by moonshine Nov 14, 2004 at 7:16 PM 1 replies 650+ views

Original Post

Nov 14, 2004 at 7:16 PM

Im struggling to understand how exactly to do this. In my engine I want a function (simply "Render()") that draws everything that needs to be drawn in a frame. Before I get to it I need to understand how to do it - ie what needs to go in it, how to structure it etc. Can anyone help explain it to me? Cheers :)

Zakwayda

Nov 14, 2004 at 7:29 PM

You may need to ask some more specific questions. A 'render' function can be arbitrarily complex depending on what features you're trying to support, and is often broken up into smaller functions. So what exactly do you want to achieve?

For a simple case, though:

1. Clear color and z buffers
2. Render static objects
3. For each dynamic object
a) Push matrix
b) Set model matrix
c) Render model
d) Pop matrix
4. Flip buffer

That's off the top of my head, so I may have missed something.

jjmontes

Nov 14, 2004 at 7:59 PM

Later on, you will be sorting objects by material, depth (in some cases)...

I also suggest that you start with the one previously suggested by jyk.

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