How to use TextureAthlas?

[askona]

I have few textures in one .psd file. How can i use textures for road (for example),and not to receive picture like this:

I loading textures for road from file:

Code: Select all

 irr::video::SMaterial* roadMaterial = new SMaterial();
	roadMaterial->setTexture(0,driver->getTexture("models/road.psd"));

[Klunk]

you need to set the uv coordinates of the model to the correct values, either in code of in the modeller/level editor.

[askona]

How can i do that? I`m beginer in graphics and irrlicht, so don`t completely understand how to work with textures

Code: Select all

irr::video::SMaterial* roadMaterial = new SMaterial();
	roadMaterial->setTexture(0,driver->getTexture("models/road.psd"));
	roadMaterial->Lighting = false;
	IMesh* fterr;
	IMeshSceneNode* planeNode;
	fterr = smgr->addHillPlaneMesh("",dimension2d<f32>(100,100),dimension2d<u32>(25,25),roadMaterial,1,dimension2d<f32>(200,200),dimension2d<f32>(3,3));
	planeNode = smgr->addMeshSceneNode(fterr);

[Radikalizm]

Be aware that a texture atlas like this can cause mipmapping artifacts for smaller mipmaps

[Klunk]

something like ?

Code: Select all

planeNode->getMesh()->getMeshBuffer(mat)->getTCoords(i)

where mat is either a smaterial or its index and i is the vertex index. The trouble with handling uv in code is you need to know which vert is which. Its much easier to do this kind of thing in a modeling package/level editor as you get visual feed back to what you are doing.

otherwise just use non-atlas textures

[askona]

I found that my .psd file contents 16 equal parts

maybe i can use it? i did`n understood what can i do with coords of my texture...even if i get few vector2df , what should i do with it?

[CondeNostaw]

Jesus, man, go do your homework before asking:

http://www.dca.ufrn.br/~lmarcos/courses ... ter09.html

That is for OpenGL, but it will help you undestand the basics.