Flickering meshes on Irrlicht 1.4

[Carnafex]

Heya all!

I've recently discovered an error that seems to have cropped up in my project since upgrading from 1.3.1 to 1.4

Basically, whenever I load an .X model into Irrlicht, and then animate it (using basic Irrlicht animators, like rotate, etc) it seems to 'flicker' every second or so. By this I mean the model renders and animates perfectly, except that every second it disappears, only to reappear just as quickly.

I'm currently using directx 9 as the renderer, although the problem occurs in dx8 and opengl as well. Oh, and it's the standard 1.4 distribution, not SVN, if that makes a difference.

The code I use is as follows:

Code: Select all

IAnimatedMesh* tempmesh;
IAnimatedMeshSceneNode* tempanimmesh;
	tempmesh = m_pGMgr->smgr->getMesh("Data/Models/temp.x");
	tempanimmesh = m_pGMgr->smgr->addAnimatedMeshSceneNode(tempmesh);
	m_pFleets.push_back(tempanimmesh);
	m_pFleets[i]->setPosition(core::vector3df(lgamedata.m_pStarmap.vFleets[i].x,0,lgamedata.m_pStarmap.vFleets[i].y));
	m_pFleets[i]->setMaterialFlag(video::EMF_LIGHTING, false);
	m_pFleets[i]->setAutomaticCulling(scene::EAC_FRUSTUM_BOX);

(m_pFleets is simply a core::array, nothing special)

I've tried disabling the lighting, changing materials, etc, but nothing seems to fix the weird flickering. Would anyone have any idea why this might be happening?

Any help would be really appreciated!

[Luke]

not really sure, could you post the mesh you are using?

[hybrid]

Try to disable the culling, could be due to non-animated bboxes.

[Carnafex]

I tried disabling the culling, and it didn't seem to help.

I've uploaded the model here http://www.megaupload.com/?d=LS4SUMZZ (it's a zip of the .x file with it's texture, very basic.)

In the meantime I'll continue trying different things to see if I can fix the problem as well.

[hybrid]

That's a problem with zfighting. You have several layers on top of each other, without much space in between. Due to floating point inaccuracy it happens that sometimes layers from beneath are drawn on top. You should remove those layers from the mesh. Also try to recalculate the normals and probably also reset vertex colors.

[Carnafex]

ah, cool! I'll remove the extra layers and give it a shot!

[Halifax]

Also just for the record there are some bugs in the Mac OS X version of 1.4 too. In the 2nd tutorial with the Quake map, whenever you get a short distance from some walls they begin to have flickers of triangles at the seam, defined edges between ground and wall. As you move further back the flickering black triangles get bigger and bigger.