applying a texture to a mesh

daemon · Post by **daemon** » Tue Apr 13, 2004 11:49 pm

hey,

i'm a newbie, newcomer, beginner, blablabla..

i loaded a mesh from an .obj file (wavefront),

scene::IAnimatedMesh* terr = smgr->getMesh("terr.obj");
scene::ISceneNode* tnode = 0;
if (terr) tnode = smgr->addOctTreeSceneNode(terr->getMesh(0));

and applied a texture to it using :
tnode->setMaterialTexture(0, driver->getTexture("terr.jpg"));

the mesh shows up.. but it's black..
it's supposed to be a mountain (grassy)..

is it allowed to put textures on meshes at all ? or am I doing something wrong ? (which is probably the cause)

dunno if this helps :
when instead of 0 i put 1 in setMaterialTexture, the mountain came up green, but the whole mountain was all the same kind of green, just one colour.. obviously terr.jpg contains more than 1 colour..

thx

daemon

Masdus · Post by **Masdus** » Wed Apr 14, 2004 12:39 am

what sort of lighting do you have in the level?

daemon · Post by **daemon** » Wed Apr 14, 2004 1:09 am

i dunno.. default.. i didn't do anything with the lighting..

there are other nodes in the scene and i see them perfectly..

there's a testnode with texture just next to it and it's ok..

anyway.. i now think the problem might lie elsewhere..
i tried applying a texture to this mountain from another program (3d modeller) and it did the same.. so it's not irrlicht.. (sorry about posting here

).

anyone has a clue of what's going on ?

i opened a md2 model applied a texture it was ok..
i opened a obj file (which was a mountain created with bryce) applied a texture and it was monochromatic

thx
daemon

arras · Post by **arras** » Wed Apr 14, 2004 9:23 am

Its look like your mesh dont have UV data. You have to UV map your model before using texture. Use your modeler to UV map your mesh or look at my site for good free UV maper LithUnwrap

daemon · Post by **daemon** » Wed Apr 14, 2004 3:10 pm

ok.. it was the UV maps after all..

now when i open the mesh with any 3d editor and apply the texture it looks fine..but irrlicht still shows it black or monochrome

i exported the mesh to a directx .x file, and it does the same thing. the mountain shows up, but it's black..

Tyn · Post by **Tyn** » Wed Apr 14, 2004 6:31 pm

You need to manually load the textures into Irrlicht with the setMaterialTexture() function. Set the texture level to 0 and it will override the texture you have set in ( unless you want to put the textures in the same folder as the mesh ). I don't know how to override two textures on a model, however I would like to *hint hint*

Edit: I noticed on a second glance that you did put the setMaterialTexture in the first one so you have probably already done that, soz my bad. Does Irrlicht's console say that the texture is loaded?

daemon · Post by **daemon** » Wed Apr 14, 2004 8:23 pm

yes it is loaded.. the mesh and the texture..

Tyn · Post by **Tyn** » Wed Apr 14, 2004 10:49 pm

Oh yeah, I didn't notice that before. You haven't got any lights in the scene right? You need to set this:

Code: Select all

node->setMaterialFlag(video::EMF_LIGHTING, false);

That will light the model, at the moment nothing is lit up so they would look black.

daemon · Post by **daemon** » Thu Apr 15, 2004 2:12 am

ahhhhhhhh now i get it

it works fine.

thanks a million !

daemon