public Quaternionf mul(double x, double y, double z, double w) {
        return mul((float) x, (float) y, (float) z, (float) w);
    }
public Quaternionf mul(double x, double y, double z, double w) {
        return mul((float) x, (float) y, (float) z, (float) w);
    }
public Quaternionf mul ( double x , double y , double z , double w ) { return mul ( ( float ) x , ( float ) y , ( float ) z , ( float ) w ) ; }
Multiplies the double components of another quaternion with this one.

@param x The x (imaginary) component of the quaternion to multiply with
@param y The y (imaginary) component of the quaternion to multiply with
@param z The z (imaginary) component of the quaternion to multiply with
@param w The w (real) component of the quaternion to multiply with
@return A new quaternion, which is the product of both
Multiplies the double components of another quaternion with this one .