public void HorizontalTimeOfCollisionTests()
{
Ball b1 = new Ball(1.0, 1.0, 5.0, 5.0, 1.0, 0.0);
Ball b2 = new Ball(1.0, 1.0, 5.0, 5.0, -10.0, 0.0);
HorizontalWall h1 = new HorizontalWall(10.0);
HorizontalWall h2 = new HorizontalWall(-10.0);
VerifyTimeOfCollision(b1, h1, true);
VerifyTimeOfCollision(b1, h2, false);
VerifyTimeOfCollision(b2, h1, false);
VerifyTimeOfCollision(b2, h2, true);
}
public void VerifyTimeOfCollision(Ball b1, HorizontalWall h, bool expectedToCollide)
{
double t1 = h.TimeOfCollision(b1);
if (t1 > 0.0)
{
Assert.IsTrue(expectedToCollide);
double y1 = b1.Y + b1.Vy * t1 + 0.5 * Globals.Gravity * t1 * t1;
if (h.Y > b1.Y)
{
Assert.AreEqual(h.Y - b1.Radius, y1, 0.01);
}
else
{
Assert.AreEqual(h.Y + b1.Radius, y1, 0.01);
}
}
else
{
Assert.IsFalse(expectedToCollide);
}
}
