class GeometryAttribute<T> {
 static final String POSITION = "position";
 static final String NORMAL = "normal";
 static final String INDEX = "index";
 static final String UV = "uv";
 static final String TANGENT = "tangent";
 static final String COLOR = "color";
 int numItems, itemSize;
 T array;

 // Used in WebGL Renderer
 Buffer buffer;

 GeometryAttribute._internal(this.numItems, this.itemSize, this.array);

 factory GeometryAttribute.float32(int numItems, [int itemSize = 1]) =>
   new GeometryAttribute<Float32List>._internal(numItems, itemSize, new Float32List(numItems));

 factory GeometryAttribute.int16(int numItems, [int itemSize = 1]) =>
     new GeometryAttribute<Int16List>._internal(numItems, itemSize, new Int16List(numItems));

}