DirextX编程

开发平台：
C#

Camera.cs：源码内容
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// Copyright (c) 三峡大学水利与环境学院 肖泽云. All rights reserved.  //
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using System;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
namespace 摄像机
{
    public partial class Camera : Form
    {
        Device device = null;//定义绘图设备
        public Camera()
        {
            this.ClientSize = new Size(800, 600);//指定窗体尺寸
            this.Text = "摄像机";//指定窗体标题
        }
        public bool InitializeDirect3D()
        {
            try
            {
                PresentParameters presentParams = new PresentParameters();
                presentParams.Windowed = true; //指定以Windows窗体形式显示
                presentParams.SwapEffect = SwapEffect.Discard; //当前屏幕绘制后它将自动从内存中删除
                device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams); //实例化device对象
                return true;
            }
            catch (DirectXException e)
            {
                MessageBox.Show(e.ToString(), "Error"); //处理异常
                return false;
            }
        }
        public void Render()
        {
            if (device == null)   //如果device为空则不渲染
            {
                return;
            }
            Vector3 eye = new Vector3(30, 0, -30);
            Vector3 at = new Vector3(0, 0, 0);
            Vector3 up = new Vector3(0, 1, 0);
            Matrix viewMatrix = Matrix.LookAtLH(eye, at, up);
            Matrix projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width/this.Height, 1.0f, 50.0f);
            device.Transform.Projection = projection;
            device.Transform.View = viewMatrix;
            device.RenderState.FillMode = FillMode.WireFrame;
            device.RenderState.Lighting = false;
            device.Clear(ClearFlags.Target, Color.DarkSlateBlue, 1.0f, 0);  //清除windows界面为深蓝色
            device.BeginScene();
            //在此添加渲染图形代码
            CustomVertex.PositionColored[] vertices = new CustomVertex.PositionColored[3];//定义顶点
            vertices[0].Position = new Vector3(0f, 0f, 0f);
            vertices[0].Color = Color.Red.ToArgb();
            vertices[1].Position = new Vector3(5f, 10f, 0f);
            vertices[1].Color = Color.Green.ToArgb();
            vertices[2].Position = new Vector3(10f, 0f, 0f);
            vertices[2].Color = Color.Yellow.ToArgb();
            device.VertexFormat = CustomVertex.PositionColored.Format;
            device.DrawUserPrimitives(PrimitiveType.TriangleList, 1, vertices);
            
            device.EndScene();
            device.Present();
        }
        static void Main()
        {
            Camera Camera = new Camera(); //创建窗体对象
            if (Camera.InitializeDirect3D() == false) //检查Direct3D是否启动
            {
                MessageBox.Show("无法启动Direct3D！", "错误！");
                return;
            }
            Camera.Show(); //如果一切都初始化成功，则显示窗体
            while (Camera.Created) //设置一个循环用于实时更新渲染状态
            {
                Camera.Render(); //保持device渲染，直到程序结束
                Application.DoEvents(); //处理键盘鼠标等输入事件
            }
        }
    }
}

						