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That's it. From all the samples I've read in the DX6 sdk, I can't think of one that didn't confuse me even more than I was when I started. I will admit that I haven't yet had time to look at the DX7 apps, but I am willing to bet that rule #1 is here to stay.
Just make sure that you don't try and learn from the samples alone, and also take a look at the SDK Docs.
--TheGoop
CU
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Skullpture Entertainment
#40842461
Other than these requirements, you have the flexibility to use, or disregard, the other vertex components. For example, if you want to include a diffuse or specular color with your untransformed vertices, you can. (This wasn't possible before DirectX 6.0). Including individual colors for each vertex makes it possible to achieve shading effects that are much more subtle and flexible than lighting calculations that use only the material color. Keep in mind that you must enable per-vertex color through the D3DRENDERSTATE_COLORVERTEX render state. Untransformed, unlit vertices can also include up to eight sets of texture coordinates.
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-Kentamanos
As far as the matrices go, the World and View matrices default to identity, and the projection defaults to a 45 degree view supposedly. I still don't know where this is documented.
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-Kentamanos
The reason for the lighting is that D3D lighting is being applied to the primitive in addition to the vertex colors. And in D3D 7 the default material is all black, which, when modulated with the vertex colors comes out black.
The sample uses the vertex format D3DFVF_LVERTEX, which indicates the vertices are pre-lit (they do not have DX apply lighting to them), but are untransformed. In otherwords the vertices use a set color and the vertices are in model coordinates. The 3 vertices for the triangle have diffuse colors of red, green, and blue.
So I have 2 questions:
1) Why is the triangle black? Shouldn't the format of the vertex just make the color of these vertices red, green, and blue. I expected a blended triangle.
2) Do the World, View, and Projection matrices have default values? SetTransform is NEVER called in this example.
Can someone please tell me what I am missing here? I am a newbie to D3D, and this one has me stumped.
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-Kentamanos
