CSMemo042 - やするん＠Wiki

 using System;
 using System.Drawing;
 using System.Windows.Forms;
 
using OpenTK;
using OpenTK.Graphics.OpenGL;
 
namespace OpenTKTest
{
    public partial class Form1 : Form
    {
        static float angle = 0.0f;
 
        private float deltaAngle = 8;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            glControl_Resize(glControl1, EventArgs.Empty);
        }
 
        void glControl_Resize(object sender, EventArgs e)
        {
            Init2(sender as OpenTK.GLControl);
        }
 
        private void Init2(OpenTK.GLControl c)
        {
            if (c.ClientSize.Height == 0)
                c.ClientSize = new System.Drawing.Size(c.ClientSize.Width, 1);
            GL.Viewport(0, 0, c.ClientSize.Width, c.ClientSize.Height);
 
            float aspect_ratio = Width / (float)Height;
            Matrix4 perpective = Matrix4.CreatePerspectiveFieldOfView(MathHelper.PiOver4, aspect_ratio, 1, 64);
            GL.MatrixMode(MatrixMode.Projection);
            GL.LoadMatrix(ref perpective);
        }
 
        private void glControl1_Paint(object sender, PaintEventArgs e)
        {
            Render();
        }
 
        private void Render()
        {
            Matrix4 lookat = Matrix4.LookAt(0, 5, 5, 0, 0, 0, 0, 1, 0);
            GL.MatrixMode(MatrixMode.Modelview);
            GL.LoadMatrix(ref lookat);
 
            GL.Rotate(angle, 0.0f, 1.0f, 0.0f);
 
            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 
            DrawTekitou();
 
            glControl1.SwapBuffers();
        }
 
        private void DrawTekitou()
        {
            GL.Begin(PrimitiveType.Quads);
 
            GL.Color3(Color.Silver);
            GL.Vertex2(-1, -1);
            GL.Vertex2(-1, 1);
            GL.Vertex2(1, 1);
            GL.Vertex2(1, -1);
 
            GL.End();
        }
 
        private void button5_Click(object sender, EventArgs e)
        {
            angle += deltaAngle;
            glControl1.Invalidate();
        }
 
        private void btnRight_Click(object sender, EventArgs e)
        {
            angle -= deltaAngle;
            glControl1.Invalidate();
        }
    }
}