stgsharp/源代码/StgSharp/Graphics/GL/Buffer/EBO.cs

using StgSharp.Math;
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;

namespace StgSharp.Graphics
{
    public partial class Form
    {
        protected ElementBuffer CreateElementBuffer(int n)
        {
            return new ElementBuffer(n, GL);
        }

        protected unsafe class ElementBuffer : IDisposable
        {
            uint[] _bufferID;
            private IglFunc GL;

            internal ElementBuffer(int n, IglFunc glFunc)
            {
                _bufferID = new uint[n];
                GL = glFunc;
                fixed (uint* id = _bufferID)
                {
                    GL.GenBuffers(n, id);
                }
            }

            public uint this[int n]
            {
                get { return _bufferID[n]; }
            }

            public void Bind(int index)
            {
                GL.BindBuffer(BufferType.ELEMENT_ARRAY_BUFFER, _bufferID[index]);
            }

            public void SetValue<T>(int index, T[] bufferArray, BufferUsage usage)
                where T : struct, IConvertible
            {
                GL.BindBuffer(BufferType.ELEMENT_ARRAY_BUFFER, _bufferID[index]);
                GL.SetBufferData(BufferType.ELEMENT_ARRAY_BUFFER, bufferArray, usage);
            }

            public void Dispose()
            {
                fixed (uint* id = _bufferID)
                {
                    GL.DeleteBuffers(_bufferID.Length, id);
                }
            }


        }
    }
}