Unit 11 按鍵

Unit 11A 按鍵控制

作業

按左右鍵會增加或減少5度

按上下可以增加或減少砲管r長度3

按空白鍵可以發射直徑為10的砲彈，發射口為砲管口(x,y),

每0.1秒x位置為x+r*cos(a),y位置為y-r*sin(a)+0.5*10*t*t,其中t為累計時間

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.Drawing.Drawing2D; //擴增定義，線型

namespace 按鍵01

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //宣告變數，畫筆顏色，亂數

        int x1 = 100, y1 = 600, x2, y2, a=90, r1=60, r2,p=0,q=0;

        int x3 = 300, y3 = 300, r3 = 100;

        double t = 0.1;

        Pen pe1, pe2; //線型顏色線寬樣式

        Random rd = new Random();

        private void Form1_Load(object sender, EventArgs e)

        {

            this.Width = 1024; this.Height = 640;

            pe1 = new Pen(Color.Purple, 10);

            //最前面新增using System.Drawing.Drawing2D;

            //線結束端點.EndCap樣式,起始端點.StartCap

            pe1.EndCap = LineCap.SquareAnchor;//Drawing2D

            pe1.StartCap = LineCap.SquareAnchor;

        }

        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            this.DoubleBuffered = true;

                        //.FillRectangle(Brushes.色彩, 左上x, 左上y, 寬, 高)

            e.Graphics.FillRectangle(Brushes.Gold, x1 - 60, y1 - 20, 60 * 2, 30);

            e.Graphics.FillRectangle(Brushes.Goldenrod, x1 - 30, y1 - 40, 30 * 2, 20);

            //1度=1*3.1416/180 弳度

            x2 = x1+(int)(r1 * Math.Cos(a * Math.PI / 180)); //用三角函數算,轉換成整數

            y2 = y1-50-(int)(r1 * Math.Sin(a * Math.PI / 180));

            e.Graphics.DrawLine(pe1, x1, y1 - 50, x2, y2);

            e.Graphics.FillEllipse(Brushes.Black,x2-5+p,y2-5-q,10,10);

        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)

        {

            //e.KeyCode:按鍵碼

            if (e.KeyCode == Keys.Left)

                a=a+10;

            else if(e.KeyCode==Keys.Right)

               a = a-10;

            if (e.KeyCode == Keys.Up)

            r1 = r1 + 3;

            else if (e.KeyCode == Keys.Down)

            r1 = r1 - 3;

            if (e.KeyCode == Keys.Space)

                timer1.Enabled = true;

            this.Refresh();

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            p = x2 + (int)(r1 * Math.Cos(a * Math.PI / 180));

            q = y2 -50- (int)(r1 * Math.Sin(a * Math.PI / 180)+0.5*10*t*t) ;

            t += 0.1;

            this.Refresh();

        }

    }

}