43 	float	m_w;  variable
54 		m_x = x, m_y = y, m_z = z, m_w = w;  in Quaternion()
76 	inline const float& w() const { return m_w; }	  in w()
84 		m_w = 0.f;  in setValue()
93 		m_w=w;  in setValue()
127 		m_x += q.x(); m_y += q.y(); m_z += q.z(); m_w += q.m_w;
134 		m_x -= q.x(); m_y -= q.y(); m_z -= q.z(); m_w -= q.m_w;
141 		m_x *= s; m_y *= s; m_z *= s; m_w *= s;
148 		setValue(m_w * q.x() + m_x * q.m_w + m_y * q.z() - m_z * q.y(),
149 			m_w * q.y() + m_y * q.m_w + m_z * q.x() - m_x * q.z(),
150 			m_w * q.z() + m_z * q.m_w + m_x * q.y() - m_y * q.x(),
151 			m_w * q.m_w - m_x * q.x() - m_y * q.y() - m_z * q.z());
158 		return m_x * q.x() + m_y * q.y() + m_z * q.z() + m_w * q.m_w;  in dot()
183 		return Quaternion(x() * s, y() * s, z() * s, m_w * s);
217 		float s = 2.0f * acos(m_w);  in getAngle()
224 		return Quaternion(m_x, m_y, m_z, -m_w);  in inverse()
232 		return Quaternion(q1.x() + q2.x(), q1.y() + q2.y(), q1.z() + q2.z(), q1.m_w + q2.m_w);
240 		return Quaternion(q1.x() - q2.x(), q1.y() - q2.y(), q1.z() - q2.z(), q1.m_w - q2.m_w);
247 		return Quaternion( - q2.x(), - q2.y(),  - q2.z(),  - q2.m_w);
273 				(m_w * s0 + q.m_w * s1) * d);  in slerp()
291 	    wx = m_w * x2; wy = m_w * y2; wz = m_w * z2;  in toOpenGLMatrix()