using specular maps in fixed function pipeline   

I have a question about using specular maps in the fixed function pipeline.  
I'm using similar code to what is in the SDK documentation under Specular 
Light Maps (Direct3D 9).....

// Set the base texture.
d3dDevice->SetTexture(0, lptexBaseTexture );

// Set the base texture operation and arguments.
d3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE );
d3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
d3dDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );

// Set the specular light map.
d3dDevice->SetTexture(1, lptexSpecLightMap);

// Set the specular light map operation and args.
d3dDevice->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_ADD );
d3dDevice->SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_TEXTURE );
d3dDevice->SetTextureStageState(1, D3DTSS_COLORARG2, D3DTA_CURRENT );

// Set the RGB light map.
d3dDevice->SetTexture(2, lptexLightMap);

// Set the RGB light map operation and arguments.
d3dDevice->SetTextureStageState(2,D3DTSS_COLOROP, D3DTOP_MODULATE);
d3dDevice->SetTextureStageState(2,D3DTSS_COLORARG1, D3DTA_TEXTURE );
d3dDevice->SetTextureStageState(2,D3DTSS_COLORARG2, D3DTA_CURRENT );


What I see in game is not exactly what I expect.  The specular values do get 
added into the texture and the light map is applied over it, but it doesn't 
appear that the specular highlights are changing as the camera / object moves 
in relation to the light.  What I'm looking for is a way to add different 
areas of specularity on the same piece of geometry using the specular map.

My guess is that this sample is intended to be a static specular map, as it 
doesn't really know about the camera or light because it's just a texture 
added over the diffuse texture.

Does anyone know if there is a way to do a specular map using the fixed 
function pipeline, or is this something that can only be done using shaders.

Thanks
-- 
-Rick

date: Tue, 6 May 2008 13:59:01 -0700   author:   rick