using System;
using System.Collections.Generic;

using OpenTK;

using org.budnhead.graphics;

namespace org.budnhead.core
{
	public abstract class WorldObject
	{
		private List<WorldObject>	children;
		
		public WorldObject()
		{
			children = new List<WorldObject>();
		}

		public virtual Model3D getModel3D(){
			return null;
		}

		public readonly BufferedValueInstance<Vector3>	Position	= new BufferedValueInstance<Vector3>(new Vector3());
		public readonly BufferedValueInstance<Matrix4>	Rotation	= new BufferedValueInstance<Matrix4>(Matrix4.Identity);
		public readonly BufferedValueInstance<Matrix4>	Scale 		= new BufferedValueInstance<Matrix4>(Matrix4.Identity);

		public Matrix4	Transformation {
			get { return (Scale.Value * Rotation.Value) * Matrix4.CreateTranslation( Position.Value ) ; }
		}
		public Matrix4	BufferedTransformation {
			get { return (Scale.BufferedValue * Rotation.BufferedValue) * Matrix4.CreateTranslation( Position.BufferedValue ) ; }
		}

		public void addChild(WorldObject wo){
			if (!children.Contains(wo)){
				children.Add(wo);
			}
		}

		public void removeChild(WorldObject wo){
			if (children.Contains(wo)){
				children.Remove(wo);
			}
	    }

		public WorldObject[] Children{
			get { return this.children.ToArray(); }
		}
	}

	public class ObjectGroup : WorldObject {
		
	}

	public class DumpObject : WorldObject {

		Model3D model3d;

		public Model3D Model3D {
			get { return this.model3d; }
			set { this.model3d = value; }
		}

		public override Model3D getModel3D()
		{
			return model3d;
		}

	}

}