OctTreeSceneNode - hides shapes

[Acki]

Hi,
it seems there is a bug with the octtree scene node...
when I look at the scene node, then some shapes are disapearing, depending on the angle I'm looking at it:

I used this mesh: map.zip (tried as .x, .3ds and .ms3d)
and this very simple code:

Code: Select all

#include <irrlicht.h>
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

int main(){
	IrrlichtDevice *device = createDevice(EDT_DIRECT3D9, dimension2d<s32>(640, 480), 16, false, false, false, 0);
	IVideoDriver* driver = device->getVideoDriver();
	ISceneManager* smgr = device->getSceneManager();

	IAnimatedMesh* mesh = smgr->getMesh("map.x");
	ISceneNode* node = smgr->addOctTreeSceneNode(mesh->getMesh(0));
	node->setMaterialFlag(EMF_LIGHTING, false);
	node->setScale(vector3df(10,5,10));

  smgr->addCameraSceneNodeFPS();
  device->getCursorControl()->setVisible(false);
	while(device->run()){
		driver->beginScene(true, true, video::SColor(0,0,0,0));
		smgr->drawAll();
		driver->endScene();
	}
	device->drop();
	return 0;
}

[Acki]

hmmm, it seems the problem is because I scaled the node...
maybe the problem goes when I recalculate the normals (I'll try this) ???

but if I use an animatedMeshSceneNode instead of the octTreeSceneNode the problem isn't there, regardless of the scale I use !?!?!

EDIT: I just tested to recalculate the normals...
and it seems to work when I create the mesh like this:

Code: Select all

IAnimatedMesh* mesh = smgr->getMesh("map.x");
smgr->getMeshManipulator()->scaleMesh(mesh, vector3df(10,5,10));
smgr->getMeshManipulator()->recalculateNormals(mesh);
ISceneNode* node = smgr->addOctTreeSceneNode(mesh->getMesh(0));

but I don't wand to scale the mesh, I want to scale the node !!!

EDIT2: this also happens to the q3 map from the sdk, depending on the scaling I use (scale = 10,5,10)...

[rogerborg]

Thanks for the report. We already have a bug open for this.

I just sprained my brain trying to work through matrix4::transformPlane() / matrix4::transformPlane_new() to get a working solution, so if you feel like taking a look...