Basic tile map implemented.

matrix.hpp

@@ -76,6 +76,14 @@ namespace matrix {
     return res;
   }
 
+  inline size_t width(Matrix &mat) {
+    return mat[0].size();
+  }
+
+  inline size_t height(Matrix &mat) {
+    return mat.size();
+  }
+
   void dump(const std::string &msg, Matrix &map, int show_x=-1, int show_y=-1);
 
   struct flood {