// Integrate the motion of the balls, including collision detection and resolution
public void IntegrateMotion(float timeStep)
{
CheckCollisions_Grid(timeStep);
foreach (Ball ball in balls)
{
ball.CheckBoundary(boxSize);
ball.MoveBall(timeStep);
ball.Fade();
}
// Update grid
grid.Empty();
List <Vector3> positions = balls.Select(o => o.position).ToList(); // make a list of the ball positions
grid.Fill(positions, balls, ballRadius);
}
