public void GetNext(Vector2 F, double time, planet b)
{
velocity.X += F.X * time / mass;
velocity.Y += F.Y * time / mass;
location.X += velocity.X * time;
location.Y += velocity.Y * time;
}
public Form1()
{
i = 0;
time_tick = 1;
this.Text = "弹球模拟";
this.Size = new System.Drawing.Size(800, 600);
graphics = this.CreateGraphics();
timer1 = new Timer();
timer1.Interval = time_tick;
timer1.Tick += new EventHandler(TimePass);
timer1.Start();
a = new planet(new Point(200, 300), new Vector2(-30, 100));
a.Texture = new SolidBrush(Pens.Blue.Color);
b = new planet(new Point(500, 300), new Vector2(30, -50));
b.Texture = new SolidBrush(Pens.Black.Color);
b.mass = 10;
l1 = new Label();
l1.AutoSize = true;
this.Controls.Add(l1);
l2 = new Label();
l2.AutoSize = true;
this.Controls.Add(l2);
time = new Label();
time.Location = new Point(0, 0);
time.AutoSize = true;
this.Controls.Add(time);
}
public Vector2 GetF(planet b)
{
Vector2 S = new Vector2(b.location.X - this.location.X, b.location.Y - this.location.Y);
double distance = Math.Sqrt(S.X * S.X + S.Y * S.Y);
Vector2 F = new Vector2(0, 0);
int G = 300 * 300 * 100;
F.X = G * this.mass * b.mass / (Math.Pow(distance, 3)) * S.X;
F.Y = G * this.mass * b.mass / (Math.Pow(distance, 3)) * S.Y;
return(F);
}