IrrlichtNETCP.Quaternion.Quaternion C# (CSharp) Method

        public Quaternion(float x, float y, float z)
        {
            double angle;

            angle = x * 0.5;
            double sr = (float)Math.Sin(angle);
            double cr = (float)Math.Cos(angle);

            angle = y * 0.5;
            double sp = (float)Math.Sin(angle);
            double cp = (float)Math.Cos(angle);

            angle = z * 0.5;
            double sy = (float)Math.Sin(angle);
            double cy = (float)Math.Cos(angle);

            double cpcy = cp * cy;
            double spcy = sp * cy;
            double cpsy = cp * sy;
            double spsy = sp * sy;

            m_x = (float)(sr * cpcy - cr * spsy);
            m_y = (float)(cr * spcy + sr * cpsy);
            m_z = (float)(cr * cpsy - sr * spcy);
            m_w = (float)(cr * cpcy + sr * spsy);

            Normalize();
        }