I am loading a traffic lights model with the.x functions the problem is i want 3 texture states for the lights etc, red, amba , green , how would i load 3 different textures if the model loading function loads 1 texture?

for(DWORD i = 0; i < numMaterials; i++) // for each material...
{
material = tempMaterials.MatD3D; // get the material info
material.Ambient = material.Diffuse; // make ambient the same as diffuse
// if there is a texture to load, load it
if(FAILED(D3DXCreateTextureFromFileA(d3ddev,
tempMaterials.pTextureFilename,
&texture)))
texture = NULL; // if there is no texture, set the texture to NULL
}

could i not use D3DXCreateTextureFromFileA 3 times on the different texture states and apply the texture this way?

because in code i need to set device->SetTexture(&red); , device->SetTexture(&amba); device->SetTexture(&green);

http://i.imgur.com/hGL4nHH.png?1

thanks if you can help

would that work with as an animated x tho?, how would you animate the lights exactly?

You may also want to consider using all three colors all the time. I.e., one can normally see the color of the non-lit lights. Then increase the brightness of the "lit" light either by using a brighter texture, or adding (and saturating) a white color to the output in the pixel shader based on a flag of some sort.

EDIT: Any reason to use textures? Why not just set the rendering color for each "light lens" portion of the mesh?

You may also want to consider using all three colors all the time. I.e., one can normally see the color of the non-lit lights. Then increase the brightness of the "lit" light either by using a brighter texture, or adding (and saturating) a white color to the output in the pixel shader based on a flag of some sort.

EDIT: Any reason to use textures? Why not just set the rendering color for each "light lens" portion of the mesh?

sorry Buckeye can you elaborate on that idea

First - normally one can see the color of the red/yellow/green lenses in a traffic light. I initially suggested you render all 3 lights with a dim color, just to make it look more like a "common" traffic light.

I'm assumed you could render each individual light separately. Now that I think about, rendering the "on" or "lit" light a second time to brighten the color will likely have depth issues. Sorry about that.

Another approach would be to set the tex coords for the 3 lights to appropriate separate areas in a single texture. Then you can have 3 textures. The 3 textures would be "RedOn," "YellowOn," and "GreenOn." Just select the texture to render with based on the state of the lights. The pix below is just a quick Paint job, so you'd have to enhance the color differences. Hopefully it gives you the idea.

[attachment=27272:traffic_lights.png]

EDIT: You'd actually only need a couple pixels per light in each texture, as the color will be "stretched" across the entire light portion of the mesh.

[attachment=27273:traffic_lights2.png]

etc.