denom = (x1-x2) * (x1-x3) * (x2-x3);
		A     = (x3 * (y2-y1) + x2 * (y1-y3) + x1 * (y3-y2)) / denom;
		B     = (x3*x3 * (y1-y2) + x2*x2 * (y3-y1) + x1*x1 * (y2-y3)) / denom;
		C     = (x2 * x3 * (x2-x3) * y1+x3 * x1 * (x3-x1) * y2+x1 * x2 * (x1-x2) * y3) / denom;