public virtual void collide(clsSprite s)
{
if (!live(20))
{
return;
}
// s.collide(this);
s.live(20);
// without the moment
float e = inf.elastic;
float ee = 1.0f + e;
float emt = inf.mass - e * s.inf.mass;
float ems = s.inf.mass - e * inf.mass;
float m = inf.mass + s.inf.mass;
float vx = (emt * velocity.X + ee * s.inf.mass * s.velocity.X) / m;
float vy = (emt * velocity.Y + ee * s.inf.mass * s.velocity.Y) / m;
s.velocity.X = (ee * inf.mass * velocity.X + ems * s.velocity.X) / m;
s.velocity.Y = (ee * inf.mass * velocity.Y + ems * s.velocity.Y) / m;
velocity.X = vx;
velocity.Y = vy;
// attenuation
s.acceleration.X = -0.2f;
s.acceleration.Y = -0.2f;
acceleration.X = -0.2f;
acceleration.Y = -0.2f;
}
private void timer1_Tick(object sender, EventArgs e)
{
for (int i = sprites.Count - 1; i >= 0; --i)
{
clsSprite sprite = sprites[i];
sprite.move();
if (!sprite.alive())
{
sprites.RemoveAt(i);
}
else if (sprite.isvanish() &&
!sprite.intersect(ClientRectangle))
{
sprites.RemoveAt(i);
}
else
{
for (int j = sprites.Count - 1; j >= 0; --j)
{
clsSprite s = sprites[j];
if (j != i && sprite.intersect(s.rect()))
{
sprite.collide(s);
}
}
if (sprite.alive() && sprite.isemission())
{
Byte[] b = new Byte[4];
rand.NextBytes(b);
if (b[0] <= 8)
{
foreach (clsShot s in sprite.emit(infShot))
{
sprites.Add(s);
}
}
}
}
}
Invalidate();
}