private void GameForm_MouseUp(object sender, MouseEventArgs e)
{
var ballSize = ball.bounds.Size;
var x = mouseDownPoint.X - ballSize.Width / 2;
var y = mouseDownPoint.Y - ballSize.Height / 2;
ball.setPosition(x, y);
ball.setSpeed(
e.Location.X - mouseDownPoint.X,
e.Location.Y - mouseDownPoint.Y
);
}
public bool didBounce(Ball ball)
{
if (!collides(ball))
{
return(false);
}
var speed = ball.getSpeed();
var pb = collisionBounds;
var bb = ball.collisionBounds;
float bx = (bb.Left + bb.Right) / 2;
float by = (bb.Top + bb.Bottom) / 2;
float ox1 = pb.Left + pb.Height / 2;
float ox2 = pb.Right - pb.Height / 2;
if (ox1 < bx && bx < ox2)
{
ball.setSpeed(speed.X, -Math.Abs(speed.Y));
System.Diagnostics.Debug.Print("Normal Bounce: " +
bb.X + " > " + (pb.X + pb.Height) + " / " +
bb.Right + " < " + (pb.Right - pb.Height)
);
return(true);
}
var midPaddleX = (pb.Left + pb.Right) / 2;
float ox = bx < midPaddleX ? ox1 : ox2;
float oy = (pb.Top + pb.Bottom) / 2;
float dx = bx - ox;
float dy = by - oy;
//System.Diagnostics.Debug.Print("(sx,sy) = " + speed.X + "," + speed.Y);
//System.Diagnostics.Debug.Print("(bx,by) = " + bx + "," + by);
//System.Diagnostics.Debug.Print("(ox,oy) = " + ox + "," + oy);
//System.Diagnostics.Debug.Print("(dx,dy) = " + dx + "," + dy);
double dist = Math.Sqrt(speed.X * speed.X + speed.Y * speed.Y);
double angle = Math.Atan2(dy, dx);
const double maxAngle = 0.9 * Math.PI;
if (angle < -maxAngle)
{
angle = -maxAngle;
}
else if (angle > maxAngle)
{
angle = maxAngle;
}
System.Diagnostics.Debug.Print("Angle: " + angle + " Dist: " + dist);
float nx = (float)(dist * Math.Cos(angle));
float ny = (float)(dist * Math.Sin(angle));
//System.Diagnostics.Debug.Print("(nx,ny) = " + nx + "," + ny);
ball.setSpeed(nx, ny);
return(true);
}
