render only when necessary

Original Post

Nov 25, 2008 at 5:23 PM

i'm developing an editor programming. it uses opengl for the rendering, with multiple contexts for multiple windows. i don't need to render at 60fps, in fact i really only want to render when necessary. right now i just render on mouse movement, so i can easily run my mouse over it and see what it is, but what would be the best way to render only when the display needs updating?

_the_phantom_

Nov 25, 2008 at 5:28 PM

you could render to a texture and, until the view needs to change, just rerender the image each frame instead.

This is about the lowest overhead you'll get I guess.

Codeka

Nov 25, 2008 at 5:47 PM

Why not just respond to WM_PAINT? That's the standard way of drawing in Windows. To "force" a repaint, just use InvalidateRect.

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