typedef struct {
	FLOAT x, y, z;     // 2-D coordinates
	FLOAT rhw;         // rhw
	FLOAT u, v;        // Texture coordinates
} sVertex_2D;
#define VERTEXFVF_2D (D3DFVF_XYZRHW | D3DFVF_TEX1)

D3DVERTEXELEMENT9 decl_2D[] = 
{
	// offsets in bytes
	{0,  0, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0},
	{0, 12, D3DDECLTYPE_FLOAT1, D3DDECLMETHOD_DEFAULT, ??,   0},
	{0, 16, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD,   0},
	D3DDECL_END()
};

D3DVERTEXELEMENT9 decl_2D[] = {	// offsets in bytes	{0,  0, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITIONT, 0},	{0, 16, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 0},	D3DDECL_END()};