--- a/engine/core/util/math/matrix.h	Wed Apr 28 21:33:11 2010 +0000
+++ b/engine/core/util/math/matrix.h	Thu Apr 29 13:51:45 2010 +0000
@@ -223,6 +223,10 @@
 				assert(ind > -1 && ind < 16);
 				return m[ind];
 			}
+			inline const T& operator[] (int ind) const {
+				assert(ind > -1 && ind < 16);
+				return m[ind];
+			}
 
 			/** Apply the matrix dot product to this matrix
 			 */
@@ -374,7 +378,8 @@
 	/** Print coords of the Matrix to a stream
 	 */
 	template<typename T>
-	std::ostream& operator<<(std::ostream& os, Matrix<T>& m) {
+	std::ostream& operator<<(std::ostream& os, const Matrix<T>& m) {
+		
 		return os << "\n|" << m[0] << "," << m[4] << "," << m[8] << ","  << m[12] << "|\n" << \
 		               "|" << m[1] << "," << m[5] << "," << m[9] << ","  << m[13] << "|\n" << \
 		               "|" << m[2] << "," << m[6] << "," << m[10] << "," << m[14] << "|\n" << \