Low FPS

systat · Post by **systat** » Wed Jul 16, 2008 5:31 pm

Hello, I am a newbie with Irrlicht, and for some reason I get relative slow fps, even though I rendered only few objects, so I wonder if I can post the whole source code of my game so far, and that you tell my what is wrong thanks.

12 FPS, when I look at this scene node, wtf?!?!

patricklucas · Post by **patricklucas** » Wed Jul 16, 2008 6:06 pm

Unoptimized model? I don't really know enough to say.

Looks like a bad case of that suntan stuff on the back of her legs.

Eigen · Post by **Eigen** » Wed Jul 16, 2008 6:45 pm

Well .. since primitive count is quite high I'd say you've got yourself a really hi-poly model there. Try lowering that.

systat · Post by **systat** » Wed Jul 16, 2008 7:28 pm

How to do that, I don't know almost anything about modeling, I got this models for free, check this out, I tried to load Octopus, It took longer time for irrlicht to initialize, after that my FPS was 1, and I fall through the terrain

Why is part of octopus black, and look at those stats, when I took screenshot the numbers were changing, and I got that screenshoted neihter, is that lowering FPS?

patricklucas · Post by **patricklucas** » Wed Jul 16, 2008 7:37 pm

I see two numbers, Max Primitive count and Primitive count, and when a number exceeds its maximum... tends to be bad?

I'd say download Blender and toy with it. I don't know for sure where, but I'm sure there's an option to optimize the model.

vitek · Post by **vitek** » Wed Jul 16, 2008 8:09 pm

The max is the maximum number of primitives that can be rendered in a single draw call. The total primitive count is the sum of all primitives rendered in all draw calls over the entire frame. This is fine.

rogerborg · Post by **rogerborg** » Wed Jul 16, 2008 8:12 pm

You'll also get significantly better performance if you rebuild Irrlicht yourself in release mode.

systat · Post by **systat** » Wed Jul 16, 2008 8:55 pm

To the Scottish guy, where can I download Irrlicht source, what dependecies I need?

Ion Dune · Post by **Ion Dune** » Wed Jul 16, 2008 8:59 pm

I may not be Scottish, but the source is inside the SDK (under "source"). I don't think it has any dependencies (maybe for DX), but the fastest way to find out would be to try it.

EDIT: This will help you out even more. Also, no dependencies unless you want DX.

JP · Post by JP » Thu Jul 17, 2008 7:28 am

If you're using free models from the internet they'll generally be extremely high poly because they've not been made for use in games... In games you generally want to keep the poly level to only a few thousand per model so these free models are basically useless to you as they are.

You can reduce the poly count in some modelling programs... milkshape has the option under the DX tools.

systat · Post by **systat** » Thu Jul 17, 2008 7:36 am

Probably, when I saw archive, it said 500 HQ models.rar(High Quality) on it, so I thought, they are really cool, didn't know about high poly :p

systat · Post by **systat** » Thu Jul 17, 2008 6:22 pm

Why I need dx8 to compile irrlicht source?!?
I already have dx9 SDK, and now when I try to compile I get errors that
some dx8 include file can't be found, what is that?

rogerborg · Post by **rogerborg** » Thu Jul 17, 2008 8:16 pm

Search in include\IrrCompileConfig.h for

#define _IRR_COMPILE_WITH_DIRECT3D_8_

and comment it out. Job's a good 'un.

christianclavet · Post by **christianclavet** » Mon Jul 21, 2008 3:34 am

For checking if it's IRRlicht that give a problem with your scene, remove all your objects (octopus, women, gun) and use the provided DWARF and compare the FPS between the 2.

I'm pretty sure that the meshes that you use right now are NOT game optimized.

If you take a BOSS character in "GEAR OF WAR", the mesh is having about 12,000 poly and this a very high number for a game character. Your mesh should not exceed 4,000 poly (for a very high quality model) and I would propose to limit yourself to 2,000 so it run correctly on the most current type of hardware.