GLSL shader tangent and binormal calculation bug

[Mel]

I have used many times the tangent space calculations and it has gone well always.



Maybe the trouble is the exporter. the 3DSMAX 3DS exporter has the rare ability of exporting the normals/smoothing groups wrong, while all the other software exports them well (things go worse in home???) If you are using MAX try another format, like OBJ, or X, or B3D if posible. 3DSMAX 2010 exports OBJs very well and the panda X exporter also does a good job.

[TCM]

What settings did you use for this

Code: Select all

	irr::scene::IMesh* tangentMesh = smgr->getMeshManipulator()->
		createMeshWithTangents(mesh->getMesh(0), 
		true,	// recalculate normals
		false,	// smooth
		false,	// angle weighted
		true	// recalculate tangents
		);

I've used several models (copied from RenderMonkey) and all of them have the same problem, it works perfect in RenderMonkey and artifacts in irrLicht.

[TCM]

Isn't this similar to:

http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=42656


???

[Mel]

Everything with the default options. And yes, it looks quite similar to that case.

This is my code to load that model.

Code: Select all

scene::IAnimatedMeshSceneNode* meshLoaderWritter::loadModel(core::stringc s){

	core::stringc currentPath = dev->getFileSystem()->getWorkingDirectory();
	irr::scene::IAnimatedMeshSceneNode* model=0;
	irr::scene::IAnimatedMesh* LoadedMesh = 0;
	irr::scene::IMesh* Tmesh=0;
	irr::scene::IAnimatedMesh* AMesh=0;
	unsigned int i,j;

	if(!smgr->getMeshCache()->isMeshLoaded(core::stringw(s.c_str()))){

		LoadedMesh = smgr->getMesh(core::stringc(s.c_str()));

		if(LoadedMesh){
			Tmesh = smgr->getMeshManipulator()->createMeshWithTangents(LoadedMesh);
			smgr->getMeshCache()->removeMesh(LoadedMesh);
		}

		if(Tmesh){
			AMesh = smgr->getMeshManipulator()->createAnimatedMesh(Tmesh);
			Tmesh->drop();
			if(AMesh){
				AMesh->getMesh(0)->setHardwareMappingHint(scene::EHM_STATIC,scene::EBT_NONE);
				smgr->getMeshCache()->addMesh(core::stringw(s.c_str()),AMesh);
				model = smgr->addAnimatedMeshSceneNode(AMesh,smgr->getSceneNodeFromId(0xFEE00000));
				AMesh->drop();
			}
		}

	}else{//The mesh was already there...
		AMesh = smgr->getMesh(core::stringc(s.c_str()));
		model = smgr->addAnimatedMeshSceneNode(AMesh,smgr->getSceneNodeFromId(0xFEE00000));
	}

	if(model){
		dev->getFileSystem()->changeWorkingDirectoryTo(path);

		for(i=0;i<model->getMaterialCount();i++){
			model->getMaterial(i).MaterialTypeParam = 192;
			model->getMaterial(i).AmbientColor=video::SColor(255,255,255,255);
			model->getMaterial(i).AntiAliasing = antialiasing;
			model->getMaterial(i).NormalizeNormals = true;
			model->getMaterial(i).Lighting=true;
			model->getMaterial(i).Shininess = 50;
			model->getMaterial(i).setTexture(2,textIO->getTextureFile("nullnormal.bmp"));
			model->getMaterial(i).setTexture(4,textIO->getTextureFile("shadowmap"));//The shadowmap rendertaget goes here!
			for(j=0;j<8;j++){
				model->getMaterial(i).TextureLayer[j].TrilinearFilter = true;
			}
		}

		dev->getFileSystem()->changeWorkingDirectoryTo(currentPath);
	}
	return model;
}

I don't use any option to import that model.

Code: Select all

if(LoadedMesh){
			Tmesh = smgr->getMeshManipulator()->createMeshWithTangents(LoadedMesh);
...
		}

And the Irrlicht version i use is from the SVN (i don't remember which now, but from very little time ago, one month at most.)

The model is exported from 3DSMAX 2010 to an X file with the normals enabled, no optimizations and in binary mode uncompressed. I use the Panda DirectX exporter from here:

http://www.andytather.co.uk/Panda/direc ... loads.aspx

BTW, that is an static model, it has no animation.

[TCM]

I used the same code ( or most of it ). It looks the same.

You are also using DirectX. I am using OpenGL.

[Mel]

I use Direct X there.