68 	Vec4& operator+=( Arg v )
70 		m_x += v.m_x;
71 		m_y += v.m_y;
72 		m_z += v.m_z;
73 		m_w += v.m_w;
77 	Vec4& operator-=( Arg v )
79 		m_x -= v.m_x;
80 		m_y -= v.m_y;
81 		m_z -= v.m_z;
82 		m_w -= v.m_w;
86 	Vec4& operator*=( Arg v )
88 		m_x *= v.m_x;
89 		m_y *= v.m_y;
90 		m_z *= v.m_z;
91 		m_w *= v.m_w;
125 	friend Vec4 Reciprocal( Vec4::Arg v )  in Reciprocal()  argument
128 			1.0f/v.m_x,   in Reciprocal()
129 			1.0f/v.m_y,   in Reciprocal()
130 			1.0f/v.m_z,   in Reciprocal()
131 			1.0f/v.m_w   in Reciprocal()
155 	friend Vec4 Truncate( Vec4::Arg v )  in Truncate()  argument
158 			v.m_x > 0.0f ? std::floor( v.m_x ) : std::ceil( v.m_x ),   in Truncate()
159 			v.m_y > 0.0f ? std::floor( v.m_y ) : std::ceil( v.m_y ),   in Truncate()
160 			v.m_z > 0.0f ? std::floor( v.m_z ) : std::ceil( v.m_z ),  in Truncate()
161 			v.m_w > 0.0f ? std::floor( v.m_w ) : std::ceil( v.m_w )  in Truncate()