OpenTK学习笔记(3)-你好！窗体！

参考：http://dreamstatecoding.blogspot.com/2017/01/opengl-4-with-opentk-in-c-part-1.html

http://www.cnblogs.com/podolski/p/7406628.html

本节在OpenTK学习笔记(2)-工作窗口的三种方法创建方法（winfrom下类的形式创建）基础上配置初始窗体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL4;
using OpenTK.Input;

namespace opentk2
{

    class MainForm : GameWindow
    {
       //int width, int height, GraphicsMode mode, string title, GameWindowFlags options, DisplayDevice device, int major, int minor, GraphicsContextFlags flags, IGraphicsContext sharedContext, bool isSingleThreaded
       //初始窗口状态设置
        , , GraphicsMode.Default, , , GraphicsContextFlags.ForwardCompatible)
        {
            Title += ": OpenGL Version: " + GL.GetString(StringName.Version);
        }
        //调整窗口时重置视图Viewport
        protected override void OnResize(EventArgs e)
        {
            GL.Viewport(, , Width, Height);
        }
        //窗口加载时  初始化一次
        protected override void OnLoad(EventArgs e)
        {
            CursorVisible = true;
        }
        //每帧更新内容
        protected override void OnUpdateFrame(FrameEventArgs e)
        {
            HandleKeyboard();
        }
        //通过按Escape键轻松关闭窗口 Esc键
        private void HandleKeyboard()
        {
            var keyState = Keyboard.GetState();

            if (keyState.IsKeyDown(Key.Escape))
            {
                Exit();
            }
        }
        //最后一帧 Title记录共进行了多少帧
        protected override void OnRenderFrame(FrameEventArgs e)
        {
            Title = $"(Vsync: {VSync}) FPS: {1f / e.Time:0}";

            Color4 backColor;
            backColor.A = 1.0f;
            backColor.R = 0.1f;
            backColor.G = 0.1f;
            backColor.B = 0.3f;
            GL.ClearColor(backColor);
            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);

            SwapBuffers();
        }
    }
}

注：非原创，作为自己学习的记录