//////////////////////////////////////////// Structure declaration  /////////////////////////////////////////////
#define MAX_PB_BLENDED_WEIGHTS	2


typedef struct _tagVertexB2
{
	D3DVECTOR		Position ;
	FLOAT			Weights[MAX_PB_BLENDED_WEIGHTS] ;
	BYTE			Indices[4] ;	// you can choose to make it 2 shorts.
	D3DVECTOR		Normal ;
	float			tu, tv ;
} VertexB2 ;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


///////////////////////// Globals /////////////////////////////

LPDIRECT3DVERTEXBUFFER8		g_pbVB ;		// vertex buffer which holds our plane vertex data
LPDIRECT3DINDEXBUFFER8		g_pbIB ;		// index buffer which holds our plane face data
LPDIRECT3DTEXTURE8			g_pbTexture ;	// texture

#define MAX_V_SHADERS			5

#define BASIC_VS				0		// VS for transforming vertex
#define BASIC_VS_WITHLIGHT		1		// VS for transforming and lighting
#define BLEND_ONLY			2		// VS for blending the vertex.
#define NON_BLEND_ONLY			3		// VS for no-blending
#define BLEND_WITH_LIGHT		4		// VS for blending with lighting.

// shader handles
DWORD					g_pbVS[MAX_V_SHADERS] ;	// our shader handle. Basic one.


DWORD					g_dwpbNumVertices ,	// Number of vertices in the plane
					g_dwpbNumIndices ;	// Number of faces in the plane

D3DMATRIX				g_rotMatPlane1 ,	// rotation matrix for the left half of the plane
					g_rotMatPlane2 ;	// rotation matrix for the right half of the plane
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


// macros
#define MAX_PLANE_TESS_LEVEL_HORZ	5	// horizontal tesselation level
#define MAX_PLANE_TESS_LEVEL_VERT	3	// vertical tesselation level

#define PLANE_WIDTH	40		// physical width of the plane
#define PLANE_HEIGHT	30		// physical height of the plane