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View Full Version : ATIX_pn_triangles question for the ATI guys.



paddy
04-24-2001, 05:23 AM
The SDK says that pn triangles are actually emulated on the RadeON. What I want to know is if the emulation is fast enought to be used in a realtime application, or is it faster to do my own subdivisions and therefore send more vertices to the card ?

Jason ? Anyone ? Thanks !

JasonM [ATI]
04-24-2001, 06:12 AM
> What I want to know is if the emulation
> is fast enought to be used in a realtime
> application, or is it faster to do my own
> subdivisions and therefore send more
> vertices to the card ?

The emulation of PN Triangles on RADEON™ is not intended to be fast enough for real-time. You should pre-tessellate your models for real-time performance. A MAX exporter (with source) is forthcoming.

Obviously, this pre-tessellation is just for prototyping. Once there is a hardware implementation of PN Triangles, you will send your low poly meshes to it.

-Jason

JasonM [ATI]
10-24-2001, 08:52 PM
There is a simple PN Triangles sample (http://www.ati.com/na/pages/resource_centre/dev_rel/sdk/RadeonSDK/Html/Samples/OpenGL/PNTriangles.html) available now.

-JasonM

[This message has been edited by JasonM [ATI] (edited 10-24-2001).]

Korval
10-24-2001, 11:13 PM
Does the Radeon 8500 provide hardware support for pn_triangles?

Humus
10-25-2001, 03:13 AM
Yes