private void CreateTweeners()
{
float start = GraphicsDevice.Viewport.Width * 0.1f;
float end = GraphicsDevice.Viewport.Width * 0.9f;
frontToBackTweener = new Tweener(start, end, 3, Quadratic.EaseInOut);
frontToBackTweener.Loop.FrontToBack();
frontToBackTimesTweener = new Tweener(start, end, 3, Quadratic.EaseInOut);
Loop.FrontToBack(frontToBackTimesTweener, 5);
backAndForthTweener = new Tweener(start, end, 3, Sinusoidal.EaseInOut);
Loop.BackAndForth(backAndForthTweener);
backAndForthTimesTweener = new Tweener(start, end, 3, Sinusoidal.EaseInOut);
backAndForthTimesTweener.Loop.BackAndForth(5);
}
public void LoopingBackAndForthWillWork()
{
float from = 0;
float to = 100;
Tweener tweener = new Tweener(from, to, 4, Linear.EaseNone);
Loop.BackAndForth(tweener);
for (int i = 0; i < 5; i++)
{
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.Greater(tweener.Position, from, "We have moved from the start, again");
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.AreEqual(to, tweener.Position, "We are at the end");
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.Less(tweener.Position, to, "We now on the way back");
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.AreEqual(from, tweener.Position, "We now at the start");
}
}
public void LoopoingBackAndForthANumberOfTimesWillWork()
{
float from = 0;
float to = 100;
int times = 4;
Tweener tweener = new Tweener(from, to, 4, Linear.EaseNone);
Loop.BackAndForth(tweener, times);
for (int i = 0; i < times; i++)
{
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.Greater(tweener.Position, from, "We have moved from the start, again");
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
}
bool positionChanged = false;
tweener.PositionChanged += delegate { positionChanged = true; };
tweener.Update(new GameTime(TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(2)));
Assert.IsFalse(positionChanged, "The tweener is no longer active as it has looped as many times as it should");
}