how do i get the vertex color of an imported .obj

[AndreL]

Hi,

i'm having problems finding out the color of the vertices in my mesh, is that info in the MeshBuffer?

Code: Select all

 
            irr::scene::IMeshBuffer* mb=mesh->getMeshBuffer(i); 
            video::S3DVertex* vertices = (video::S3DVertex*)mb->getVertices();
 

the video::S3DVertex* vertices have the vertices right position, but now how do i find the colors?

[CuteAlien]

Using the S3DVertex Color member: http://irrlicht.sourceforge.net/docu/st ... ertex.html

[AndreL]

I'm really new at this and stuck at this point, could you please show me an example, how do i get access to the mesh vertex color?

[CuteAlien]

You already got the pointer to vertices above - so you can just loop over them and get the color.
Something like:

Code: Select all

 
irr::scene::IMeshBuffer* mb=mesh->getMeshBuffer(i); 
if (  mb->getVertexType () == EVT_STANDARD )
{
    video::S3DVertex* vertices = (video::S3DVertex*)mb->getVertices();
    for ( u32 v=0; v < mb->getVertexCount (); ++v )
    {
         video::SColor myCol = vertices[v].Color;
    }
}
 

[AndreL]

Thanks CuteAlien, however, myCol is returning all white for all vertices.

[CuteAlien]

I don't know anything about your .obj file ... maybe they are white?

[AndreL]

it's just a plane exported in maya, with a texture file, just red. 4 vertices, 6 indexes.

[hybrid]

.obj does not support vertex color IIRC.

[mongoose7]

Kd?

Anyway, he's exported with a texture and expects the vertices to have the colour of the texture. The vertices are white, the texture is read. Enough said.

[MTLZ]

Sorry to bring back this thread but I have exactly the same problem.
I'm looking for a mesh format that support materials and vertex colors. I though "obj" was the one but there is no vertex color.
Can anyone advice me which format Irrlicht can import with materials and vertex color ?

Thanks.

[chronologicaldot]

Besides its native format? hm... Try b3d... I think...