Low FPS

Scripter · Post by **Scripter** » Wed Apr 30, 2008 1:20 pm

I have a problem with the fps in a project im working on, regarding the rendering time. We have 29000 primitives(Polygons) in our scene and ive timed the rendering function which takes 15-16ms = about 62,5 FPS. Then add physx and someother stuff and we have 40-50FPS. All this seems a little bit low, ive coded Directx 9.0c demos with 100k polygons with higher FPS then this.
Computer specs: Intel Core2 6300(1.86ghz), 1gb ram, Geforce 8800GTS

Does anyone have a good reason for all this, maybe a quick fix for this? Because as it is now, its not playable(we havent even added in other players to play against)
We have tryied alot of Culling options, Z-enable/write and so on, still nothing.

We are using EDT_DIRECT3D9.
Thx
/Scripter

hybrid · Post by **hybrid** » Wed Apr 30, 2008 1:39 pm

29k polys doesn't say too much about the actual scene. How many materials do you use, how many scene nodes are there? What parameters do you choose when creating the device, do you think that VBOs wiould help?

twilight17 · Post by **twilight17** » Wed Apr 30, 2008 2:39 pm

Maks sure your building and testing in release not debug! That happened to me once and I freaked out

rogerborg · Post by **rogerborg** » Wed Apr 30, 2008 4:56 pm

With a release build of Irrlicht too!

Danny Gilbert · Post by **Danny Gilbert** » Wed Apr 30, 2008 6:54 pm

Check if you use Vertical Sync....
vsync if I remember.

Set it to FALSE.

twilight17 · Post by **twilight17** » Wed Apr 30, 2008 9:13 pm

rogerborg wrote:With a release build of Irrlicht too!

Oh yeah dude! Forgot about that

BlindSide · Post by **BlindSide** » Wed Apr 30, 2008 9:33 pm

They are probably using stencil shadows

But yes,

Polygon counts are largely irrelevant these days, most recent graphical applications on modern hardware are fillrate limited, this means that the low fps is not caused by vertex transformations but by the size/amount of textures, lighting and special effects.

How about a screenshot or a demo, when we see this we can more accurately describe whats causing a slow-down.

Cheers

hybrid · Post by **hybrid** » Thu May 01, 2008 11:02 pm

We already discussed some stuff on IRC. It's a large map (static .x) with 30 textures (IIRC). I've suggested octree and VBOs, but didn't hear about FPS for those cases.