+ /// Resets the VertexArray to a different format. All data is cleared.
+ void reset(const VertexFormat &);
+
+ const VertexFormat &get_format() const { return format; }
+
+ /// Clears all vertices from the array.
+ void clear();
+
+ /// Reserve space for vertices.
+ void reserve(unsigned);
+
+ /// Append a new vertex at the end of the array and return its location.
+ float *append();
+
+ /// Returns the location of a vertex for modification.
+ float *modify(unsigned);
+private:
+ virtual unsigned get_data_size() const;
+ virtual const void *get_data_pointer() const { return &data[0]; }
+
+public:
+ unsigned size() const { return data.size()/stride; }
+ const std::vector<float> &get_data() const { return data; }
+ const float *operator[](unsigned i) const { return &data[0]+i*stride; }