+ delete vbuf;
+ vbuf = 0;
+ delete ibuf;
+ ibuf = 0;
+ }
+}
+
+void Mesh::create_buffers()
+{
+ defer_buffers = false;
+
+ if(!vbuf)
+ vbuf = new Buffer(ARRAY_BUFFER);
+ vertices.use_vertex_buffer(vbuf);
+
+ if(!ibuf)
+ ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
+}
+
+unsigned Mesh::get_n_vertices() const
+{
+ return vertices.size();
+}
+
+float *Mesh::modify_vertex(unsigned i)
+{
+ return vertices.modify(i);