class Attribute<T> {
 String type;
 List<T> value;

 Float32List array;
 Buffer buffer;
 int size;

 String boundTo = null;
 bool needsUpdate = false;
 bool __webglInitialized = false;
 bool createUniqueBuffers = false;

 Attribute<T> __original;

 Attribute(this.type, this.value) {
   size = 1;
   if( type == "v2" ) { size = 2; }
   else if( type == "v3" ) { size = 3; }
   else if( type == "v4" ) { size = 4; }
   else if( type == "c"  ) { size = 3; }

   if (value == null) {
     value = [];
   }
 }

 Attribute clone() {
   var a = new Attribute(type, value);
   return a;
 }

 factory Attribute.color([List<num> hex]) => new Attribute<Color>("c", (hex != null) ? hex.map((h) => new Color(h)) : null);

 factory Attribute.float([List<double> v]) => new Attribute<double>("f", v);
 factory Attribute.int([List<int> v]) => new Attribute<int>("i", v);

 factory Attribute.vector2([List<Vector2> v]) => new Attribute<Vector2>("v2", v);
 factory Attribute.vector3([List<Vector3> v]) => new Attribute<Vector3>("v3", v);
 factory Attribute.vector4([List<Vector4> v]) => new Attribute<Vector4>("v4", v);
}