Fog problem

[gogo]

This is fog effect test. I set fog over nodes, and succeeded. But look at ground and background. Background must be hided by the fog according to natural rule, too. Only nodes were being hided and oddly rendered white.
I would like the effect that nodes disappear into the fog and appear from the fog naturally. Can I do so? How likely?

1-near

2-distant

3-far more distant

[JP]

You need to apply fog to all the nodes which you want fog to affect... so your terrain there should have fog applied. the fog on the characters does look a bit strange though...

[gogo]

Hi, JP.
Indeed fog can be applied to a normal mesh.

Code: Select all

mesh->setMaterialFlag(EMF_FOG_ENABLE, true);	

However ITerrainSceneNode does not have "setMaterialFlag", so fog cannot be applied about terrain.
My code to create terrain is:

Code: Select all

ITerrainSceneNode* terrain = smgr->addTerrainSceneNode( 
		"terrain.bmp",
		0,										// parent node
		-1,										// node id
		vector3df(-400.f, 0.f, -400.f),			// position
		vector3df(0.f, 0.f, 0.f),			// rotation
		vector3df(4.f, 0.1f, 4.f),		// scale
		SColor ( 255, 255, 255, 255 ),	// vertexColor,
		5,										// maxLOD
		ETPS_17,							// patchSize
		4										// smoothFactor
		);
	terrain->setMaterialTexture(0, driver->getTexture("terrain_texture.bmp"));
	terrain->setMaterialType(EMT_DETAIL_MAP);
	terrain->setMaterialFlag(EMF_LIGHTING, false);

That is the reason why I am at a loss.

[Xplod]

What shadows have to do with terrains ?

To enable fog on your nodes, just do node->setMaterialFlag(EMF_FOG_ENABLE, true); (or EMF_FOG_ENABLED, I don't remember exactly).


Edit : Sorry, I just saw your edit.

So, do something like :

Code: Select all

for (i = 0; i < node->getMaterialCount(); i++)
{
node->getMaterial(i).FogEnabled = true;
}

Or something like that, I'm not at home so I can't check.

[hybrid]

However ITerrainSceneNode does not have "setMaterialFlag", so fog cannot be applied about terrain.

Code: Select all

terrain->setMaterialFlag(EMF_LIGHTING, false);

Ehh, what now? Of course terrain has the setMaterialFlag, because it's an ISceneNode...

[JP]

He's even using setMaterialFlag in the code he posted

[gogo]

Ah, oh. I was misundrstanding so much. It is right what you say.
I was able to accomplish my objective. Now I'm thinking how to make the fog itself. Advise plz.

[JP]

Now it just looks like your skybox isn't affected by the fog, which it just isn't because that doesn't make much sense. The skybox is your horizon and if you've got thick fog going off into the distance you won't see the horizon so you can just get rid of your skybox and change the colour in driver->beginScene() to the colour of you fog.

Your tree leaves also don't seem to be getting fog, not sure why that would be though, unless they're a different node to the trunk?