Multiple UV Maps in a single material?

[El Newto]

Hi,

I'm new to GLSL coding so I hope this isn't a silly question.

 

I am trying to use a second UV map for a diffuse detail texture on models imported from blender. I made a modified version of the diffuse+normal+specular shader by adding the extra code:

 

 

 

//Extra code added to vertex shader

//Attributes
in vec2 vertex_texcoords1;

//Outputs
out vec2 ex_texcoords1;
void main()
{
ex_texcoords1 = vertex_texcoords1;
}

//Extra code added to fragment shader

//Uniforms
uniform sampler2D texture4; //detail map

//Inputs
in vec2 ex_texcoords1;

void main(void)
{
outcolor += texture(texture4,ex_texcoords1);
}

 

This does not appear to work, this may be because the code is wrong or because the model does not get imported into leadwerks with more than one UV map.

 

If someone could enlighten me I would be very grateful.

 

Thanks, El

[shadmar]

That will work, assuming your model have 2 uv-maps and texture4 holds a texture.

 

You can use these to test your shader :

http://www.leadwerks.com/werkspace/topic/8439-fbx-converter-and-second-uv-channel/#entry65740

[El Newto]

Excellent, thank you shadmar