main/src/georegression/struct/so/Rodrigues_F64.java
public void setParamVector( double  x , double y , double z ) {
		double ax = Math.abs(x);
		double ay = Math.abs(y);
		double az = Math.abs(z);

		double max = Math.max(ax,ay);
		max = Math.max(max,az);
		
		if( max == 0 ) {
			theta = 0;
			unitAxisRotation.set(1,0,0);
		} else {
			x /= max;
			y /= max;
			z /= max;
			theta = Math.sqrt(x*x + y*y + z*z);
			unitAxisRotation.x = x/theta;
			unitAxisRotation.y = y/theta;
			unitAxisRotation.z = z/theta;
			theta *= max;
		}
	}
public void setParamVector( double  x , double y , double z ) {
		double ax = Math.abs(x);
		double ay = Math.abs(y);
		double az = Math.abs(z);

		double max = Math.max(ax,ay);
		max = Math.max(max,az);
		
		if( max == 0 ) {
			theta = 0;
			unitAxisRotation.set(1,0,0);
		} else {
			x /= max;
			y /= max;
			z /= max;
			theta = Math.sqrt(x*x + y*y + z*z);
			unitAxisRotation.x = x/theta;
			unitAxisRotation.y = y/theta;
			unitAxisRotation.z = z/theta;
			theta *= max;
		}
	}
Assign the Rodrigues coordinates using a 3 element vector.  Theta is the vector's
magnitude and the axis of rotation is the unit vector.

@param x x-component of 3 vector
@param y y-component of 3 vector
@param z z-component of 3 vector