C#openGL画立方体

下面是一个使用C#和OpenGL画立方体的示例代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
using Tao.OpenGl;
using Tao.FreeGlut;

namespace OpenGLTutorial
{
    class Program : Form
    {
        static void Main(string[] args)
        {
            Application.Run(new Program());
        }

        public Program()
        {
            this.Load += new EventHandler(Form_Load);
            this.Paint += new PaintEventHandler(Form_Paint);
            this.Resize += new EventHandler(Form_Resize);
        }

        private void Form_Load(object sender, EventArgs e)
        {
            Glut.glutInit();
            Glut.glutInitDisplayMode(Glut.GLUT_RGBA | Glut.GLUT_DOUBLE | Glut.GLUT_DEPTH);

            Gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
            Gl.glViewport(0, 0, this.Width, this.Height);

            Gl.glMatrixMode(Gl.GL_PROJECTION);
            Gl.glLoadIdentity();
            Glu.gluPerspective(45, (double)this.Width / (double)this.Height, 0.1, 200);

            Gl.glMatrixMode(Gl.GL_MODELVIEW);
            Gl.glLoadIdentity();

            Gl.glEnable(Gl.GL_DEPTH_TEST);
        }

        private void Form_Resize(object sender, EventArgs e)
        {
            Gl.glViewport(0, 0, this.Width, this.Height);
            Gl.glMatrixMode(Gl.GL_PROJECTION);
            Gl.glLoadIdentity();
            Glu.gluPerspective(45, (double)this.Width / (double)this.Height, 0.1, 200);
            Gl.glMatrixMode(Gl.GL_MODELVIEW);
        }

        private void Form_Paint(object sender, PaintEventArgs e)
        {
            Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT);
            Gl.glLoadIdentity();

            Gl.glTranslatef(0.0f, 0.0f, -6.0f);

            Gl.glBegin(Gl.GL_QUADS);

            // Front Face
            Gl.glColor3f(1.0f, 0.0f, 0.0f);
            Gl.glVertex3f(-1.0f, -1.0f,  1.0f);
            Gl.glVertex3f( 1.0f, -1.0f,  1.0f);
            Gl.glVertex3f( 1.0f,  1.0f,  1.0f);
            Gl.glVertex3f(-1.0f,  1.0f,  1.0f);

            // Back Face
            Gl.glColor3f(0.0f, 1.0f, 0.0f);
            Gl.glVertex3f(-1.0f, -1.0f, -1.0f);
            Gl.glVertex3f(-1.0f,  1.0f, -1.0f);
            Gl.glVertex3f( 1.0f,  1.0f, -1.0f);
            Gl.glVertex3f( 1.0f, -1.0f, -1.0f);

            // Top Face
            Gl.glColor3f(0.0f, 0.0f, 1.0f);
            Gl.glVertex3f(-1.0f,  1.0f, -1.0f);
            Gl.glVertex3f(-1.0f,  1.0f,  1.0f);
            Gl.glVertex3f( 1.0f,  1.0f,  1.0f);
            Gl.glVertex3f( 1.0f,  1.0f, -1.0f);

            // Bottom Face
            Gl.glColor3f(1.0f, 1.0f, 0.0f);
            Gl.glVertex3f(-1.0f, -1.0f, -1.0f);
            Gl.glVertex3f( 1.0f, -1.0f, -1.0f);
            Gl.glVertex3f( 1.0f, -1.0f,  1.0f);
            Gl.glVertex3f(-1.0f, -1.0f,  1.0f);

            // Right face
            Gl.glColor3f(1.0f, 0.0f, 1.0f);
            Gl.glVertex3f( 1.0f, -1.0f, -1.0f);
            Gl.glVertex3f( 1.0f,  1.0f, -1.0f);
            Gl.glVertex3f( 1.0f,  1.0f,  1.0f);
            Gl.glVertex3f( 1.0f, -1.0f,  1.0f);

            // Left Face
            Gl.glColor3f(0.0f, 1.0f, 1.0f);
            Gl.glVertex3f(-1.0f, -1.0f, -1.0f);
            Gl.glVertex3f(-1.0f, -1.0f,  1.0f);
            Gl.glVertex3f(-1.0f,  1.0f,  1.0f);
            Gl.glVertex3f(-1.0f,  1.0f, -1.0f);

            Gl.glEnd();

            Gl.glFlush();
            Glut.glutSwapBuffers();
        }
    }
}

在上面的代码中，我们使用了Tao.OpenGl和Tao.FreeGlut库来进行OpenGL编程。在构造函数中，我们注册了窗体的Load、Resize和Paint事件。在Load事件处理函数中，我们设置了OpenGL的视口、投影矩阵和模型矩阵，并启用了深度测试。在Resize事件处理函数中，我们根据窗体大小重新设置了投影矩阵。在Paint事件处理函数中，我们使用glBegin和glEnd函数来绘制立方体，并设置了每个面的颜色。最后，我们使用glFlush和glutSwapBuffers函数将绘制结果显示出来。