hardware tessellation of polygons

Riviera Kid · Post by **Riviera Kid** » Sun Nov 13, 2005 4:06 am

I understand that the psp has hardware tessellation correct?

well i havent got a notion of how to do it. I have done a search about but i cant find much on the subject.

Can anyone help me?

chp · Post by **chp** » Sun Nov 13, 2005 8:32 pm

There's a sample in the PSPSDK that shows the use of spline-surfaces, and I think there's something for pspgl aswell.

Ska · Post by **Ska** » Mon Nov 14, 2005 10:15 pm

Do u mean something like GluTess functions (given a list of countours2d, produce triangles in according with fill-rules, handling non simplicity, holes, intersections, and all other degenerations) but in hardware ? (incredible if real...)

Ska - Amanith Team

jsgf · Post by **jsgf** » Wed Nov 23, 2005 10:08 am

There's only curved surface subdivision. There's no general polygon tesselation.

Ska · Post by **Ska** » Wed Nov 23, 2005 5:01 pm

Eheheh ;) I see.
I've already implemented a software tesselator (like glutess one) for amanith framework, and i'm almost sure that it is impossible to do in hardware.

Ska - Amanith Team

jsgf · Post by **jsgf** » Wed Nov 23, 2005 5:23 pm

Yeah, I've done some myself. You could do it in hardware fairly easily if you exclude self-intersecting shapes. Then it's fairly easy, but not particularly useful, unless your hardware is specifically for rasterising 2D vector content.