gistfile1.cs

        public void Flush()
        {
            try
            {
                unsafe
                {
                    fixed (float* pVert = vertexBuffer, pTex = texCoordBuffer, pCol = ColorBuffer)
                    {
                        GL.VertexPointer(3, 0, 0, (IntPtr)pVert);
                        if (hasTexture)
                            GL.TexCoordPointer(2, 0, 0, (IntPtr)pTex);
                        if (hasColor)
                            GL.ColorPointer(3, 0, 0, (IntPtr)pCol);

                        GL.EnableClientState(ArrayCap.VertexArray);
                        if (hasTexture)
                            GL.EnableClientState(ArrayCap.TextureCoordArray);
                        if (hasColor)
                            GL.EnableClientState(ArrayCap.ColorArray);
                        GL.DrawArrays(PrimitiveType.Quads, 0, vertices);

                        GL.DisableClientState(ArrayCap.VertexArray);
                        if (hasTexture)
                            GL.DisableClientState(ArrayCap.TextureCoordArray);
                        if (hasColor)
                            GL.DisableClientState(ArrayCap.ColorArray);
                        GL.Finish();
                        Clear();
                    }
                }
            }
            catch (Exception e)
            {
                System.Windows.Forms.MessageBox.Show(e.Message, "Flush Error", System.Windows.Forms.MessageBoxButtons.OK);
            }
        }