摘要：D3DFVF_DIFFUSE是个DWORD哦。4个字节。// Untransformed vertex for unlit, untextured, Gouraud-shaded // content with diffuse material color specified per vertex.dwFVF = ( D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_DIFFUSE );不能这样：dwFVF = ( D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_NORMAL ); 阅读全文

摘要：//_ // \_ 逆时针 D3DXVECTOR3 Quad[4] ={ D3DXVECTOR3(-1.0f, -1.0f, 2), D3DXVECTOR3(1.0f, -1.0f, 2), D3DXVECTOR3(-1.0f, 1.0f, 2), D3DXVECTOR3(1.0f, 1.0f, 2) }; ... 阅读全文

摘要：shader版龙书第20章，射线与三角形相交，作者为了显示相交，会对点击到的三角形进行单独Solid渲染一次，而整体用Wireframe渲染。对于D3DXIntersect函数用来检测射线和网格的相交情况。它有个参数，FaceIndex：[out] Pointer to an index value of the face closest to the ray origin（指向最靠近射线起源的面（三角形）索引值。）作者从网格得到顶点缓冲，索引缓冲，准备渲染。样式为：device->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, pMesh- 阅读全文