Flickering large polygons

Graphics and GPU Programming Programming

Started by Dennis August 28, 2000 04:57 AM

4 comments, last by Dennis 23 years, 7 months ago

122

Author

August 28, 2000 04:57 AM

The skybox in my Direct3D game is made of a few very large polygons and with some camera positions/rotations, a part of the large poly isn''t drawed. When I scale everything down I don''t have the problem, but I don''t want to have 1 meter equal 0.01 units. Is there another way to avoid this problem????? Dennis (Sorry for my horrible English)

X-Man

122

August 28, 2000 07:49 AM

I had that problem with Directx5RM, and had to break up the sky into smaller triangles. Because of speed problems, I later went for a horizon-only billboard over a blitted sky color. I ended up with a rotated 2D sky in the end since it was the fastest.

I think the problem is to do with multiple clipping edges, but not sure... Hope this helps...

maikgerth

122

August 28, 2000 05:17 PM

switching off vsync be a reason ... just a guess

Ampere

122

August 28, 2000 06:12 PM

Have you checked your far clip plane?

Dennis

122

Author

August 29, 2000 04:05 AM

Of course, the far clip plane!

Thanx a lot!

Knarkles

271

August 29, 2000 05:32 AM

A related question:

Why are large polygons extremely slow? When I tried to do a skycube, or rather a "starcube" for my game engine, it slowed down to less than half FPS. What''s the problem?

-Jussi