#define CV_ZERO 				0
#define CV_ONE 					1
#define CV_VCAM 				2
// (density,start_distance,255.0f,ignore)
#define CV_FOG	 				3	

#define CV_WORLDVIEWPROJ_0		4
#define CV_WORLDVIEWPROJ_1		5
#define CV_WORLDVIEWPROJ_2		6
#define CV_WORLDVIEWPROJ_3		7

#define CV_WORLDVIEW_0			8
#define CV_WORLDVIEW_1			9
#define CV_WORLDVIEW_2			10
#define CV_WORLDVIEW_3			11

#define CV_WORLD_0 				12
#define CV_WORLD_1 				13
#define CV_WORLD_2 				14
                     
#define CV_BASISTRANSFORM_0		15
#define CV_BASISTRANSFORM_1		16
#define CV_BASISTRANSFORM_2		17

#define CV_EYE_WORLD 			18
#define CV_BUMPSCALE 			19

// CV_SMALL_DELTA = D3DVECTOR4(x,y,SMALL_Z_VALUE,w);
#define CV_SMALL_DELTA			20
#define CV_SUN_POS				21

// pixel shader constants
#define CP_SUN_VECTOR		0
#define CP_SUBSTACT_VECTOR	1       
#define CP_SUN_COLOR		2
#define CP_SUN_VECTOR1		3
// shadow 
#define CP_SHADOW_SCALE		1	
// foam
#define CP_FOAM_COLOR		0