114 	Matrix &Matrix::operator+=(const Matrix &N)  in operator +=()  argument
118 		M(1, 1) += N(1, 1); M(1, 2) += N(1, 2); M(1, 3) += N(1, 3); M(1, 4) += N(1, 4);  in operator +=()
119 		M(2, 1) += N(2, 1); M(2, 2) += N(2, 2); M(2, 3) += N(2, 3); M(2, 4) += N(2, 4);  in operator +=()
120 		M(3, 1) += N(3, 1); M(3, 2) += N(3, 2); M(3, 3) += N(3, 3); M(3, 4) += N(3, 4);  in operator +=()
121 		M(4, 1) += N(4, 1); M(4, 2) += N(4, 2); M(4, 3) += N(4, 3); M(4, 4) += N(4, 4);  in operator +=()
126 	Matrix &Matrix::operator-=(const Matrix &N)  in operator -=()  argument
130 		M(1, 1) -= N(1, 1); M(1, 2) -= N(1, 2); M(1, 3) -= N(1, 3); M(1, 4) -= N(1, 4);  in operator -=()
131 		M(2, 1) -= N(2, 1); M(2, 2) -= N(2, 2); M(2, 3) -= N(2, 3); M(2, 4) -= N(2, 4);  in operator -=()
132 		M(3, 1) -= N(3, 1); M(3, 2) -= N(3, 2); M(3, 3) -= N(3, 3); M(3, 4) -= N(3, 4);  in operator -=()
133 		M(4, 1) -= N(4, 1); M(4, 2) -= N(4, 2); M(4, 3) -= N(4, 3); M(4, 4) -= N(4, 4);  in operator -=()
162 	bool operator==(const Matrix &M, const Matrix &N)  in operator ==()  argument
164 		if(M(1, 1) == N(1, 1) && M(1, 2) == N(1, 2) && M(1, 3) == N(1, 3) && M(1, 4) == N(1, 4) &&  in operator ==()
165 		   M(2, 1) == N(2, 1) && M(2, 2) == N(2, 2) && M(2, 3) == N(2, 3) && M(2, 4) == N(2, 4) &&  in operator ==()
166 		   M(3, 1) == N(3, 1) && M(3, 2) == N(3, 2) && M(3, 3) == N(3, 3) && M(3, 4) == N(3, 4) &&  in operator ==()
167 		   M(4, 1) == N(4, 1) && M(4, 2) == N(4, 2) && M(4, 3) == N(4, 3) && M(4, 4) == N(4, 4))  in operator ==()
173 	bool operator!=(const Matrix &M, const Matrix &N)  in operator !=()  argument
175 		if(M(1, 1) != N(1, 1) || M(1, 2) != N(1, 2) || M(1, 3) != N(1, 3) || M(1, 4) != N(1, 4) ||  in operator !=()
176 		   M(2, 1) != N(2, 1) || M(2, 2) != N(2, 2) || M(2, 3) != N(2, 3) || M(2, 4) != N(2, 4) ||  in operator !=()
177 		   M(3, 1) != N(3, 1) || M(3, 2) != N(3, 2) || M(3, 3) != N(3, 3) || M(3, 4) != N(3, 4) ||  in operator !=()
178 		   M(4, 1) != N(4, 1) || M(4, 2) != N(4, 2) || M(4, 3) != N(4, 3) || M(4, 4) != N(4, 4))  in operator !=()
184 	Matrix operator+(const Matrix &M, const Matrix &N)  in operator +()  argument
186 		return Matrix(M(1, 1) + N(1, 1), M(1, 2) + N(1, 2), M(1, 3) + N(1, 3), M(1, 4) + N(1, 4),   in operator +()
187 		              M(2, 1) + N(2, 1), M(2, 2) + N(2, 2), M(2, 3) + N(2, 3), M(2, 4) + N(2, 4),   in operator +()
188 		              M(3, 1) + N(3, 1), M(3, 2) + N(3, 2), M(3, 3) + N(3, 3), M(3, 4) + N(3, 4),   in operator +()
189 		              M(4, 1) + N(4, 1), M(4, 2) + N(4, 2), M(4, 3) + N(4, 3), M(4, 4) + N(4, 4));  in operator +()
192 	Matrix operator-(const Matrix &M, const Matrix &N)  in operator -()  argument
194 		return Matrix(M(1, 1) - N(1, 1), M(1, 2) - N(1, 2), M(1, 3) - N(1, 3), M(1, 4) - N(1, 4),   in operator -()
195 		              M(2, 1) - N(2, 1), M(2, 2) - N(2, 2), M(2, 3) - N(2, 3), M(2, 4) - N(2, 4),   in operator -()
196 		              M(3, 1) - N(3, 1), M(3, 2) - N(3, 2), M(3, 3) - N(3, 3), M(3, 4) - N(3, 4),   in operator -()
197 		              M(4, 1) - N(4, 1), M(4, 2) - N(4, 2), M(4, 3) - N(4, 3), M(4, 4) - N(4, 4));  in operator -()
216 	Matrix operator*(const Matrix &M, const Matrix &N)  in operator *()  argument
218 …N(1, 1) + M(1, 2) * N(2, 1) + M(1, 3) * N(3, 1) + M(1, 4) * N(4, 1), M(1, 1) * N(1, 2) + M(1, 2) *…  in operator *()
219 …N(1, 1) + M(2, 2) * N(2, 1) + M(2, 3) * N(3, 1) + M(2, 4) * N(4, 1), M(2, 1) * N(1, 2) + M(2, 2) *…  in operator *()
220 …N(1, 1) + M(3, 2) * N(2, 1) + M(3, 3) * N(3, 1) + M(3, 4) * N(4, 1), M(3, 1) * N(1, 2) + M(3, 2) *…  in operator *()
221 …N(1, 1) + M(4, 2) * N(2, 1) + M(4, 3) * N(3, 1) + M(4, 4) * N(4, 1), M(4, 1) * N(1, 2) + M(4, 2) *…  in operator *()
326 		v1 /= Vector::N(v1);  in orthogonalise()
327 		v2 /= Vector::N(v2);  in orthogonalise()
328 		v3 /= Vector::N(v3);  in orthogonalise()
387 		y /= Vector::N(y);  in lookAt()
390 		x /= Vector::N(x);  in lookAt()
393 		z /= Vector::N(z);  in lookAt()