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Another HUD question

Started by Indigo Darkwolf Jan 31, 2004 at 5:09 PM 1 replies 850+ views

Original Post

Jan 31, 2004 at 5:09 PM

What if I wanted to do a 3d view of a scene in the HUD? In my case, I''m wanting to do a zoom-in effect, similar to what was implemented in Halo with its weapons, with the zoom taking up part of the screen while the rest of the view stays normal.

"Remember: Silly is a state of Mind, Stupid is a way of Life." -- Dave Butler

OrangyTang

Jan 31, 2004 at 5:18 PM

For picture-in-picture effects you can either:
- Render the sub picture to a texture, then use the texture when you draw the main image
- Or, use the viewport, scissor or stencil tests to restrict drawing to only a part of the screen, and render your subimage into it after the main image. glViewport is probably simplest, but that only gets you rectangular areas. Using stencil testing with the viewport allows you to get irregular areas.

Indigo Darkwolf

Jan 31, 2004 at 5:30 PM

Ah, so. Rock on, and by that I mean spiffy.

Thanks.

"Remember: Silly is a state of Mind, Stupid is a way of Life." -- Dave Butler

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