OpenTK3完整例子1_显示绿色背景

代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Input;
using OpenTK.Graphics.OpenGL;


namespace WindowsFormsApp1
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() {
            using (Game game = new Game(600, 300, "Hello OpenTK!"))
            {
                game.Run(30.0);
            }
        }
    }

    class Game : GameWindow
    {
        public Game(int width, int height, string title) : base(width, height, GraphicsMode.Default, title)
        {
        }
        protected override void OnUpdateFrame(FrameEventArgs e)
        {
            base.OnUpdateFrame(e);

            KeyboardState input = Keyboard.GetState();

            if (input.IsKeyDown(Key.Escape))
            {
                Exit();
            }
        }

        protected override void OnLoad(EventArgs e)
        {
            GL.ClearColor(0.0f, 1.0f, 0.0f, 1.0f);

            //Code goes here

            base.OnLoad(e);
        }

        protected override void OnRenderFrame(FrameEventArgs e)
        {
            GL.Clear(ClearBufferMask.ColorBufferBit);

            //Code goes here.

            Context.SwapBuffers();
            base.OnRenderFrame(e);
        }
    }

}

结果