自定义顶点格式的纹理坐标纹理坐标起始从0开始

D3DVERTEXELEMENT9       vertexelement[] = 
{
  { 0, 0, D3DDECLTYPE_FLOAT3,  D3DDECLMETHOD_DEFAULT,D3DDECLUSAGE_POSITION, 0 },//POS
  { 0, 12,D3DDECLTYPE_D3DCOLOR,D3DDECLMETHOD_DEFAULT,D3DDECLUSAGE_COLOR,    0 },//COLOR
  { 0, 12,D3DDECLTYPE_FLOAT2,  D3DDECLMETHOD_DEFAULT,D3DDECLUSAGE_TEXCOORD,【0】},//UV1从0开始,不是1
  { 0, 24,D3DDECLTYPE_FLOAT2,  D3DDECLMETHOD_DEFAULT,D3DDECLUSAGE_TEXCOORD, 2 },//UV2
  D3DDECL_END()
};