void	 T3D_Convert(int x,int y,int *px,int *py);
void	 T3D_ConvertZ(int x,int y,int z,int *px,int *py);
void	 T3D_Convert_Inv(int x,int y,int *px,int *py);
PREFS_3D T3D_Set_Prefs(PREFS_3D In_Prefs);

void	T3D_2D_Rot(	float	angle,	int	*p_x,	int	*p_y);