PSP Graphic problem

siberianstar · Post by **siberianstar** » Fri Jun 30, 2006 10:49 pm

Hello,

i'm developing a 3d game for psp but there is a problem with the psp culling system.

http://85.25.18.122/IM000345.jpg

the psp cut off the triangles that have the vertex too far from the screen, how can i solve it ?

I'm using pspgl

jimparis · Post by **jimparis** » Fri Jun 30, 2006 11:45 pm

Search forums for "clipping" and find lots of info, like
http://forums.ps2dev.org/viewtopic.php? ... t=clipping

siberianstar · Post by **siberianstar** » Fri Jun 30, 2006 11:58 pm

i'm using pspgl not gu

siberianstar · Post by **siberianstar** » Sat Jul 01, 2006 12:11 am

ok, then, i'm using pspgl. How can i see the real coords X,Y of a vector X,Y,Z.

ector · Post by **ector** » Sat Jul 01, 2006 1:58 am

Well, if you're going to do manual clipping, you'll want to do it in 3D space.

But I think that you should just subdivide all your triangles into smaller ones, since the PSP can handle quite a lot of them without problems.

siberianstar · Post by **siberianstar** » Sat Jul 01, 2006 5:14 am

i've done a test ...

using 700 triangles = 60fps about
using 2100 triangles = 23fps

-_- and if i comment the glDrawElements the fps returns to 60fps also with 2100 triangles.

siberianstar · Post by **siberianstar** » Sat Jul 01, 2006 6:09 am

IF anyone used the pspgl how can i have the more speed?

danzel · Post by **danzel** » Sat Jul 01, 2006 11:05 am

I'm making a 2d game and I was rendering all the sprites by drawing 2 triangles, I changed this to use a triangle strip to draw each sprite and saw a 50% improvement.

ector · Post by **ector** » Sat Jul 01, 2006 8:08 pm

Do not ever draw your sprites or triangles one by one, always submit lists of triangles or sprites. You will get huge speed improvements compared to sending them off one by one.