// MonoGame - Copyright (C) The MonoGame Team
// This file is subject to the terms and conditions defined in
// file 'LICENSE.txt', which is part of this source code package.

using System.Runtime.Serialization;
using System.Runtime.InteropServices;

namespace Microsoft.Xna.Framework.Graphics
{
    [DataContract]
    [StructLayout(LayoutKind.Sequential, Pack = 1)]
	public struct VertexPosition : IVertexType
	{
        [DataMember]
		public Vector3 Position;

		public static readonly VertexDeclaration VertexDeclaration;

		public VertexPosition(Vector3 position)
		{
			Position = position;
		}

		VertexDeclaration IVertexType.VertexDeclaration
        {
			get { return VertexDeclaration; }
		}

		public override int GetHashCode()
		{
		    return Position.GetHashCode();
		}

		public override string ToString()
		{
            return "{{Position:" + Position + "}}";
		}

		public static bool operator == (VertexPosition left, VertexPosition right)
		{
			return left.Position == right.Position;
		}

		public static bool operator != (VertexPosition left, VertexPosition right)
		{
			return !(left == right);
		}

        public override bool Equals(object obj)
        {
            if (obj == null)
            {
                return false;
            }
            if (obj.GetType() != GetType())
            {
                return false;
            }
            return this == (VertexPosition) obj;
        }

        static VertexPosition()
		{
			VertexElement[] elements = { new VertexElement (0, VertexElementFormat.Vector3, VertexElementUsage.Position, 0) };
            VertexDeclaration declaration = new VertexDeclaration(elements);
			VertexDeclaration = declaration;
		}
	}
}
