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  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Drawing.Drawing2D;
  7. using System.Drawing.Imaging;
  8. using System.Linq;
  9. using System.Text;
  10. using System.Windows.Forms;
  11.  
  12. namespace WindowsFormsApplication1
  13. {
  14.     public partial class Form1 : Form
  15.     {
  16.         public Form1()
  17.         {
  18.             InitializeComponent();
  19.         }
  20.         PictureBox pic = new PictureBox();
  21.         Bitmap[] bmp = new Bitmap[2];
  22.         Timer timer = new Timer();
  23.         Rectangle SRect;
  24.         GraphicsPath gp = new GraphicsPath();
  25.         private void Form1_Load(object sender, EventArgs e)
  26.         {
  27.             this.FormBorderStyle = FormBorderStyle.FixedToolWindow;
  28.             this.ClientSize = new Size(600, 600);
  29.             pic.Dock = DockStyle.Fill;           
  30.             this.Controls.Add(pic);
  31.  
  32.             bmp[0] = new Bitmap(600, 600, PixelFormat.Format32bppArgb);
  33.             bmp[1] = new Bitmap(600, 600, PixelFormat.Format32bppArgb);
  34.  
  35.             SRect = new Rectangle(0, 0, 600, 600);
  36.             gp.AddEllipse(0, 0, 10, 10);
  37.             pic.Click += new EventHandler(pic_Click);
  38.             timer.Interval = (int)(1.0f / 30.0f * 1000.0f);
  39.             timer.Tick += new EventHandler(timer_Tick);
  40.             timer.Enabled = true;
  41.             this.ModeSet();
  42.         }
  43.         void ModeSet()
  44.         {
  45.             this.Text = "Mode = " + Mode.ToString();
  46.             allb.Clear();
  47.         }
  48.         int Mode = 0;
  49.         void pic_Click(object sender, EventArgs e)
  50.         {
  51.             if (Mode == 0)
  52.             {
  53.                 Mode = 1;
  54.             }
  55.             else if (Mode == 1)
  56.             {
  57.                 Mode = 2;
  58.             }
  59.             else if (Mode == 2)
  60.             {
  61.                 Mode = 0;
  62.             }
  63.             this.ModeSet();
  64.         }
  65.         int screen = 0;
  66.         int SetCount = 0;
  67.         List<Bullet> allb = new List<Bullet>();
  68.         List<Bullet> delb = new List<Bullet>();
  69.         Font stringFont = new Font(new FontFamily("メイリオ"), 20.0f);
  70.         void timer_Tick(object sender, EventArgs e)
  71.         {
  72.             if (Mode == 0)
  73.             {
  74.             }
  75.             else if (Mode == 1)
  76.             {
  77.                 if (SetCount == 10)
  78.                 {
  79.                     this.SetBullet(15,5);
  80.                     SetCount = -1;
  81.                 }
  82.                 SetCount++;
  83.             }
  84.             else if (Mode == 2)
  85.             {
  86.                 if (SetCount == 10)
  87.                 {
  88.                     this.SetBullet(30,5);
  89.                     SetCount = -1;
  90.                 }
  91.                 SetCount++;
  92.             }
  93.             using (Graphics g = Graphics.FromImage(bmp[screen]))
  94.             {
  95.                 g.FillRectangle(Brushes.White, SRect);
  96.                 Matrix m = new Matrix();
  97.                 foreach (Bullet b in allb)
  98.                 {
  99.                     if (!b.Move())
  100.                     {
  101.                         m.Translate(b.Lx, b.Ly);
  102.                         g.Transform = m;
  103.                         g.FillPath(Brushes.Blue, gp);
  104.                         m.Reset();
  105.                         g.Transform = m;
  106.                     }
  107.                     else
  108.                     {
  109.                         delb.Add(b);
  110.                     }
  111.                 }
  112.                 g.DrawString("Bullet = " + allb.Count.ToString(),
  113.                     stringFont, Brushes.Black, 10.0f, 10.0f);
  114.             }
  115.             pic.Image = bmp[screen];
  116.             screen ^= 1;
  117.             foreach (Bullet b in delb)
  118.             {
  119.                 allb.Remove(b);
  120.             }
  121.             delb.Clear();
  122.         }
  123.         void SetBullet(int Num, double Vec)
  124.         {
  125.             if (Num < 10) Num = 10;
  126.             if (Num > 360) Num = 360;
  127.             double Angle = Math.PI * (360.0 / Num) /180.0;
  128.             for (int i = 0; i < Num; i++)
  129.             {
  130.                 Bullet b = new Bullet();
  131.                 b.DeleteTime = 100;
  132.                 b.Lx = 300;
  133.                 b.Ly = 300;
  134.                 b.Vx = (float)(Vec * Math.Cos(Angle * i));
  135.                 b.Vy = (float)(Vec * Math.Sin(Angle * i));
  136.                 //x' = x * cosθ - y * sinθ
  137.                 //y' = x * sinθ + y * cosθ
  138.                 //↓
  139.                 //x = v * cosθ
  140.                 //y = v * sinθ
  141.                 allb.Add(b);
  142.             }
  143.         }
  144.     }
  145.     public class Bullet
  146.     {
  147.         public float Lx { get; set; }
  148.         public float Ly { get; set; }
  149.         public Size Size { get; set; }
  150.         public float Vx { get; set; }
  151.         public float Vy { get; set; }
  152.         public int DeleteTime { get; set; }
  153.         public bool Move()
  154.         {
  155.             this.Lx += Vx;
  156.             this.Ly += Vy;
  157.             DeleteTime--;
  158.             if (DeleteTime < 0) return true;
  159.             return false;
  160.         }
  161.     }
  162. }
  163.  
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https://ideone.com/5Vh54
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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