terrain rendering problems

[kazimoto]

I played around with the terrain rendering example (example 12) and found out that if I scaled the terrain large enough the camera can sometimes fly through the terrain! Anybody knows what I missed? I changed this part only

Code: Select all

	// add terrain scene node
	scene::ITerrainSceneNode* terrain = smgr->addTerrainSceneNode( 
		"../../media/terrain-heightmap.bmp");

	terrain->setScale(core::vector3df(200.0f, 16.0f, 200.0f));
	terrain->setMaterialFlag(video::EMF_LIGHTING, false);

	terrain->setMaterialTexture(0, driver->getTexture("../../media/terrain-texture.jpg"));
	terrain->setMaterialTexture(1, driver->getTexture("../../media/detailmap3.jpg"));
	
	terrain->setMaterialType(video::EMT_DETAIL_MAP);

	terrain->scaleTexture(1.0f, 40.0f);

[krama757]

So with a collision triangle selector you can still fly through the terrain eh?

I guess it wasnt made to handle extremely large terrains. Some wierd things happen when you make triangles too big

[zenoid]

same result here, plus there are strage visual artifacts displayed far from the camera.

[krama757]

Yea I think thats the geomipmapping not being able to reduce triangles properly. Thats the "popping effect" no?

You would have to reduce the LOD if you dont want to see that...or just change the distances.

[kazimoto]

Erm, so, I guess the only way is to use a bunch of terrain scene node instead of a single huge node? Dang, hehe

[bitplane]

/me also tries
looks to me like you can fall through triangles that are bigger than your collision sphere
terrain collision is probably overkill anyway, maybe you should ditch the terrain selector and use this or something-
http://irrlicht.sourceforge.net/phpBB2/ ... hp?p=63079

[Spintz]

I'll take a look, never tried scales that large, wonder if the scale causes the calculations to get too large and screws them up.