irrlicht performance

[Serg88]

Hi people,
I am interested how can enlarge performance of application
or it`s trouble only with irr-engine?

My programm show me 5 FPS and
PrimitiveCountDrawn(0) return me 232873

But only my terrain use 262144 vertexes
and 26214 pyramid with 5 vertex each.

irrlicht does not assume the optimization rendering?
even 24 thousand primitives and 5 fps is very little

http://rapidshare.com/files/305726142/FPS_DEMO.rar.html

in my demo im use cycle

Code: Select all

	IMeshBuffer* mb = terrain->getMesh()->getMeshBuffer(0);

	for(int i=0; i<mb->getVertexCount();i+=10)
		{
			//core::vector3df pos = mb->getNormal(i); //mb->getTCoords(i);
			core::vector3df pos = mb->getPosition(i); //mb->getTCoords(i);
			pos.X *=5; // terrain was scaled
			pos.Y+= 5;
			pos.Z *=5;

			gameModel* tmp = new Test1(this->device,this->player.node,pos,core::vector3df(0,0,0));

		}
	printf("VERTEX COUNT: %d\n", mb->getVertexCount());

i load model with GetMesh(MODEL_NAME) and use simple animator

Code: Select all

		scene::ISceneNodeAnimator* anim = 0;
		core::vector3df end_pos = obj_pos;
		end_pos.Y += 200;
		anim = smgr->createFlyStraightAnimator(obj_pos,end_pos,1200,true,true);
		node->addAnimator(anim);
		anim->drop();

[Lonesome Ducky]

Uh 232873 is quite high. If you insist on keeping it at that number, try vbo's or level of detail.

[Serg88]

Please tell more about VBO, what is it?

LOD don`t needed, my models is already lowpoly(only 6 rectangles)

How i can hide objects when he is invisible or behind the wall?

Because when my camera don`t watch on terrain my FPS is still low.
This is that what worries me.

[Lonesome Ducky]

The problem is that irrlicht doesn't deal well with lots of scene nodes. I remember Bitplane wrote some code for a batching mesh, I'll dig that up later. And for VBO's, say you have a scene node called node, then you would do

Code: Select all

node->getMesh()->setHardwareMappingHint(EHM_STATIC)

[Serg88]

So this is a problem of Irrlicht, hardware, or node count?

[Lonesome Ducky]

Node count. Any engine will have problems with having to render so many nodes. Try this. It's bitplane's batching mesh code, which should speed up rendering for so many nodes.

[Serg88]

great thanks