private void CheckCollisions(MovingBall ball)
{
// Make list of balls to check collisions against
List <MovingBall> collisionList = new List <MovingBall>();
foreach (ColourPoolBall b in balls)
{
collisionList.Add(b);
}
// Remove ball as we don't need to see if ball collides with itself
collisionList.Remove(ball);
// Check for collision with every other ball
foreach (ColourPoolBall b2 in collisionList)
{
if (ball.CollidesWith(b2))
{
ball.Touching(b2);
//bounce both balls - this is not very accurate :-(
ball.XSpeed *= -1;
ball.YSpeed *= -1;
b2.XSpeed *= -1;
b2.YSpeed *= -1;
}
}
}
public bool CollidesWith(MovingBall anotherBall)
{
// Get differences of coords
int dx = xCoord - anotherBall.xCoord;
int dy = yCoord - anotherBall.yCoord;
// Euclidean Distance between the balls
double dist = Math.Sqrt((double)(dx * dx) + (double)(dy * dy));
// If distance is less than the diameter, the balls are touching
return(dist < (double)size);
}
public void Bounce(MovingBall anotherBall)
{
// Get differences of coords
int dx = xCoord - anotherBall.xCoord;
int dy = yCoord - anotherBall.yCoord;
//bounce both balls - this is not very accurate :-(
XSpeed *= -1;
YSpeed *= -1;
anotherBall.XSpeed *= -1;
anotherBall.YSpeed *= -1;
}
private bool CheckOverlaps(MovingBall ball)
{
//check if overlaps any existing balls
foreach (ColourPoolBall b in balls)
{
if (ball.CollidesWith(b))
{
ball.Touching(b);
return(true); //found an overlap
}
}
return(false); //got to end of loop, so no overlaps
}
public void Touching(MovingBall anotherBall)
{
while (CollidesWith(anotherBall))
{
if (X < anotherBall.X)
{
MoveHorizontal(-1);
}
else
{
MoveHorizontal(+1);
}
if (Y < anotherBall.Y)
{
MoveVertical(-1);
}
else
{
MoveVertical(+1);
}
}
}
