Unit 14A 類別定義與動畫

「類別」可以有很多屬性，有「類別」比較好管理

Ex:球具有圓心、顏色、穿透性(反彈係數)…靜態特性

專案>加入類別 bomb.cs

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;

namespace 類別1

{

    class bomb

    {

        public int x, y, r,mx,my, w, h; //類別成員變數: 圓心、直徑、移動方向、視窗寬高

        public Brush br; //顏色非整數

        public bomb() { } //宣告類別變數，空的建構元constructor

        public bomb(int x1, int y1, int r1, int mx1, int my1,Brush br1, int w1, int h1) //指定初值

        {

            x = x1; y = y1; r = r1; mx=mx1 ; my=my1; br = br1; w = w1; h = h1;//右邊指定給左邊

        }

        public void drawC(Graphics g)//畫圓要有畫布

        {

            g.FillEllipse(br,x-r/2,y-r/2,r,r); //(x,y)圓心

        }

        public void move()

        {

            x=x+mx; y=y+my;//mx:移動的x方向距離

            if (x+r/2>w-3) //碰右牆

                mx=-mx;

            else if (x-r/2<0) //碰左牆

                mx=-mx;

            else if (y+r/2>h) //碰視窗下緣

                my=-my;

            else if (y-r/2<0) //碰視窗上緣

                my=-my;

        }

    }

}

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;

namespace 類別1//主程式

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

            Random rd = new Random(); //定義亂數

           

            bomb[] bo = new bomb[5]; //很多個球用中括號

        private void Form1_Load(object sender, EventArgs e)

        {

            this.Width = 960; this.Height = 640;

            this.DesktopLocation = new Point(5, 10);

            for (int i=0;i<bo.Length; i++)    //陣列初值for迴圈

                bo[i]=new bomb(rd.Next(50,900), rd.Next(50,550),

                    rd.Next(48,120), rd.Next(-25,25),rd.Next(-25,25),

                    new SolidBrush(Color.FromArgb(rd.Next(99,255),

                        rd.Next(99,255),rd.Next(99,255))),960,640);

        }

        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            this.DoubleBuffered = true;

            for (int i = 0; i < bo.Length; i++)

                bo[i].drawC(e.Graphics);

                    }

        private void timer1_Tick(object sender, EventArgs e)

        {

            for (int i = 0; i < bo.Length; i++)

                bo[i].move();

            for (int i = 0; i < bo.Length; i++)

                for (int j = i + 1; j < bo.Length;j++ )

                    if (collide(bo[i], bo[j]))

                    {

                        bomb t = new bomb();

                        t.mx = bo[i].mx;

                        t.my = bo[i].my;

                        bo[i].mx = bo[j].my;

                        bo[i].my = bo[j].my;

                        bo[j].mx = t.mx;

                        bo[j].my = t.my;

                    }

                    this.Refresh();

        }

        bool collide(bomb b1, bomb b2) //布林值

        {

            if((b1.x - b1.r/2 < b2.x + b2.r/2 &&

                b1.x + b1.r/2 > b2.x - b2.r/2 &&

                b1.y - b1.r/2 < b2.y + b2.r/2 &&

                b1.y + b1.r/2 > b2.y - b2.r/2))

                return true;

            else

                return false;

        }

    }

}