/// <summary>
/// Construct an interpolation
/// </summary>
/// <param name="y0">min value on y axis</param>
/// <param name="y1">max value on y axis</param>
/// <param name="duration">duration of interpolation</param>
/// <param name="ease">easing function</param>
public Interpolation(float y0, float y1, float duration = 1, EEasingFunction ease = EEasingFunction.Linear)
{
if (duration == 0)
{
throw new ArgumentException("Duration cannot = 0 in an interpolation");
}
Y1 = y1;
Y0 = y0;
Duration = duration;
EasingFunction = ease;
_ease = ease.Function();
YSpan = Y1 - Y0;
}
public void Works()
{
// Arrange
Interpolation interp = new Interpolation(1, 2, 2, EEasingFunction.Linear);
// Act
float t0 = interp.Interpolate(0);
float t1 = interp.Interpolate(1);
float t2 = interp.Interpolate(2);
bool failed = false;
foreach (EEasingFunction funcName in UTEnum.GetEnumAsArray <EEasingFunction>())
{
DEasingFunction func = funcName.Function();
float zero = func(0);
float one = func(1);
if (zero != 0 || one != 1)
{
failed = true;
break;
}
if (funcName.ToString().StartsWith("InOut"))
{
float point5 = func(0.5f);
if (point5 != 0.5f)
{
failed = true;
break;
}
}
}
// Assert
Assert.That(t0 == 1);
Assert.That(t1 == 1.5);
Assert.That(t2 == 2);
Assert.That(!failed);
}