Question

嗯，问题是这样说的。当我禁用灯光（pd3dDevice->SetRenderState(D3DRS_LIGHTING, TRUE);）时，我得到了预期的颜色，当我将其设置为true时，即使我设置了环境光，我也会得到纯黑色，但是当设置了材料。但是顶点颜色然后被完全忽略，我只得到环境光的颜色。

到目前为止的搜索： 我发现的唯一有用的文章是vertex lighting tutorial，，但是它会从顶点中删除漫反射颜色，而是添加一个法线向量。同样在MSDN上，关于漫反射光照，它没有参考顶点的颜色。我开始怀疑顶点的颜色，如RHW值，通常在运行时计算，并且在声明期间设置它只是给出颜色而不需要光照。是吗？

与照明相关的代码：

pd3dDevice->SetRenderState(D3DRS_LIGHTING, TRUE);
pd3dDevice->SetRenderState(D3DRS_COLORVERTEX, TRUE); // not sure if needed
pd3dDevice->SetRenderState(D3DRS_AMBIENT, D3DCOLOR_ARGB(22, 255, 255, 255)); // no visible difference on A
pd3dDevice->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD); // probably not needed yet, can't harm

D3DMATERIAL9 material;

D3DCOLORVALUE zeroColor;
D3DCOLORVALUE oneColor;

zeroColor.a = 0;
zeroColor.r = 0;
zeroColor.g = 0;
zeroColor.b = 0;

oneColor.a = 0; // no perceivable difference between 0 and 1
oneColor.r = 1;
oneColor.g = 1;
oneColor.b = 1;

material.Ambient = oneColor;
material.Diffuse = zeroColor; //setting it to oneColor has no effect
material.Emissive = zeroColor;
material.Power = 0; //no difference if 0 or 1
material.Specular = zeroColor;
pd3dDevice->SetMaterial(&material);

Answer 1

If you want to use the vertex colors as input to the lighting calculation, you need to set the render state D3DRS_AMBIENTMATERIALSOURCE to D3DMCS_COLOR1 (for the diffuse vertex color). The same applies to the other color components.

启用照明时，DirectX 9顶点颜色是否进入？

1 个答案: