namespace DirectX_Training
{
    class Skybox
    {
        private string skyboxName;
        private VertexBuffer vertexBuffer;
        private IndexBuffer indexBuffer;
        private CustomVertex.PositionNormalTextured[] vertices;
        private short[] indices;

        //Constructor
        public Skybox(string skyboxName)
        {
            //Skybow will be drawn using vertexBuffer for optimal performance
            vertexBuffer = new VertexBuffer(typeof(CustomVertex.PositionNormalTextured), 3, device, Usage.Dynamic | Usage.WriteOnly, CustomVertex.PositionNormalTextured.Format, Pool.Default);

            //Format and count of vertices
            vertices = new CustomVertex.PositionNormalTextured[5];

            //Here we start defining vertices for the skybox
            vertices[0].Position = new Vector3(-50f, 50f, 50f);
            vertices[1].Position = new Vector3(50f, -50f, 50f);
            vertices[2].Position = new Vector3(-50f, -50f, 50f);

            //And finally, push the information into the vertexBuffer ;)
            vertexBuffer.SetData(vertices, 0, LockFlags.None);



            //Next we have to create indices and indexBuffer
            indexBuffer = new IndexBuffer(typeof(short), 3, device, Usage.WriteOnly, Pool.Default);

            indices = new short[3];
 
            indices[0]=0;
            indices[1]=1;
            indices[2]=2;
 
            indexBuffer.SetData(indices, 0, LockFlags.None);
        }

        public void Draw()
        {
            device.SetStreamSource(0, vertexBuffer, 0);
            device.Indices = indexBuffer;

            device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, 3, 0, 2);
        }

        public void Erase()
        {

        }
    }
}