C# 飞跃星空屏保程序源码

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using Skl.Utility;
using Skl.MathUtility;

namespace Test
{
    public partial class FrmMain : Form
    {
        BufferedGraphics m_BuffGraphics;
        Thread m_Thread;
        Random m_Rnd;
        Font m_Font = new Font("微软雅黑", 10, FontStyle.Bold);
        Bitmap m_bm;

        
        // 3D引擎常量
        int m_ViewDistance = 50 ;
        int m_NearZ = 10;
        int m_FarZ = 2000;

        // 物体
        List<Vector3> m_Stars = new List<Vector3>(); 

        public FrmMain()
        {
            InitializeComponent();

            int nSeed = DateTime.Now.Year   DateTime.Now.Month   DateTime.Now.Day   DateTime.Now.Hour   DateTime.Now.Minute   DateTime.Now.Second;
            m_Rnd = new Random(nSeed);

            m_bm = new Bitmap( "yh2.jpg") ;

            var g = Graphics.FromHwnd(this.Handle);
            m_BuffGraphics = BufferedGraphicsManager.Current.Allocate(g,
                new Rectangle(0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));
            //g.Dispose();

            m_Thread = new Thread(tpRun) { IsBackground = true };
            m_Thread.Start();
        }

        void Init()
        {
            for (int i = 0; i < 600;   i)
            {
                Vector3 v = new Vector3( 0 , 0 , 0 );
                v.x = -Width / 2   m_Rnd.Next() % Width;
                v.y = -Height / 2   m_Rnd.Next() % Height;
                v.z = -m_NearZ   m_Rnd.Next() % (m_FarZ - m_NearZ);
                m_Stars.Add(v);
            }
        }

        void tpRun()
        {
            Chronograph c = new Chronograph();

            Init();

            while (true)
            {
                c.Begin();

                Render();
                Logic();

                while (c.Elapsed < 1000 / 60)
                {
                    Thread.Sleep(1);
                }

            }

        }

        void Logic()
        {
            for (int i = 0; i < m_Stars.Count;   i)
            {
                var pt = m_Stars[ i ] ;
                pt.z  = -3 ;

                if( pt.z < m_NearZ || pt.z > m_FarZ )
                {
                    InitStar( pt ) ;
                }
            }

        }

        void InitStar(Vector3 v)
        {
            v.x = -Width / 2   m_Rnd.Next() % Width;
            //v.y = -Height / 10   m_Rnd.Next() % ( Height / 5 ) ;
            v.y = -Height / 2   m_Rnd.Next() % Height;
            v.z = -m_NearZ   m_Rnd.Next() % (m_FarZ - m_NearZ);

        }

        void Render()
        {
            m_BuffGraphics.Graphics.Clear(Color.Black);

            Pen pen = new Pen(Color.White);

            float Radius = 0.8f;
            float Xbm  ;
            float Ybm  ;
            //Xbm = Width / 2 - m_bm.Width / 2;
            //Ybm = Height / 2 - m_bm.Height / 2;
            Xbm = Width / 2 - 650 ;
            Ybm = Height / 2 - 360;
            m_BuffGraphics.Graphics.DrawImage(m_bm, Xbm, Ybm);

            // 坐标变换
            for (int i = 0; i < m_Stars.Count;   i)
            {
                var pt = m_Stars[ i ] ;
                // 透视变换
                float x_per = m_ViewDistance * pt.x / pt.z;
                float y_per = m_ViewDistance * pt.y / pt.z;

                // 屏幕变换
                float x_scr = Width / 2   x_per;
                float y_scr = Height / 2   y_per;

                // 渲染
                m_BuffGraphics.Graphics.DrawEllipse(pen,
                    x_scr - Radius, y_scr - Radius, Radius * 2, Radius * 2 );
            }

            #region 文字信息

            m_BuffGraphics.Graphics.DrawString(
                "作者：Steven Kyle Lee\r\nQQ:349714731",
                m_Font, Brushes.LightBlue, 10, Height - 200);

            #endregion

            m_BuffGraphics.Render();

        }

    }
}