Object collision
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class Form1 : System.Windows.Forms.Form { private int dx = 4; private System.Windows.Forms.PictureBox picTarget; private System.Windows.Forms.PictureBox picBall; private System.Windows.Forms.Timer timer1; public Form1() { InitializeComponent(); } private void InitializeComponent() { this.picTarget = new System.Windows.Forms.PictureBox(); this.picBall = new System.Windows.Forms.PictureBox(); this.timer1 = new System.Windows.Forms.Timer(new System.ComponentModel.Container()); this.SuspendLayout(); this.picTarget.BackColor = Color.Red; this.picTarget.Location = new System.Drawing.Point(160, 240); this.picTarget.Name = "picTarget"; this.picTarget.Size = new System.Drawing.Size(56, 56); this.picTarget.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; this.picTarget.TabIndex = 0; this.picTarget.TabStop = false; this.picBall.Image = new Bitmap("winter.jpg"); this.picBall.Location = new System.Drawing.Point(24, 136); this.picBall.Name = "picBall"; this.picBall.Size = new System.Drawing.Size(32, 32); this.picBall.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; this.picBall.TabIndex = 1; this.picBall.TabStop = false; this.timer1.Enabled = true; this.timer1.Tick += new System.EventHandler(this.timer1_Tick); this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.BackColor = System.Drawing.Color.White; this.ClientSize = new System.Drawing.Size(392, 341); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.picBall, this.picTarget}); this.Name = "Form1"; this.Text = "Crasher"; this.ResumeLayout(false); } [STAThread] static void Main() { Application.Run(new Form1()); } private void timer1_Tick(object sender, System.EventArgs e) { int newX, newY; newX = picBall.Location.X + dx; newY = picBall.Location.Y + dx; if (newX > this.Width - picBall.Width){ dx = - dx; } if (newX < 0){ dx = - dx; } if (picBall.Bounds.IntersectsWith(picTarget.Bounds)){ this.BackColor = Color.Black; } else { this.BackColor = Color.White; } picBall.Location = new Point(newX, newY); } }