//3(U,V,W) -> 2ijϊ
//ϊ =U =(V-W)/SQRT(3)
	igAlph = igCurU;		//=U
	data = igCurV;
	data -= igCurW;		//-(V-W)
	data *= 18918;		//1/SQRT(3)=0.57735
	data *= 2;
	data /= 65536;
	igBeta = data;		//=(V-W)/SQRT(3)
