public static Vector3 GetTangent(List <Waypoint> keyframes, double time, bool normalize = false, bool handleCriticalPoints = false)
{
if (keyframes.Count == 0)
{
return(new Vector3(0.25f, 0, 0));
}
Vector3 tangent = Vector3.zero;
InterpolationSet <Waypoint> interpolationData = Interpolate(keyframes, time);
if (interpolationData != null)
{
return(CalculateTangent(interpolationData.first, interpolationData.second, interpolationData.value, normalize));
}
if (handleCriticalPoints && Mathf.Approximately(tangent.magnitude, 0.0f))
{
float maxTime = (float)keyframes[keyframes.Count - 1].time;
float timef = Mathf.Clamp((float)time, 0.0f, maxTime);
float startTime = Mathf.Clamp(timef - 0.1f, 0.0f, maxTime);
float endTime = Mathf.Clamp(timef + 0.1f, 0.0f, maxTime);
Vector3 startPosition = GetPosition(keyframes, startTime, Vector3.zero);
Vector3 endPosition = GetPosition(keyframes, endTime, Vector3.zero);
Vector3 delta = (endPosition - startPosition);
tangent = normalize ? delta.normalized : delta;
}
return(tangent);
}
private static Vector3 FindPosition(List <Waypoint> keyframes, double time, Vector3 defaultPosition)
{
InterpolationSet <Waypoint> interpolationData = Interpolate(keyframes, time);
if (interpolationData != null)
{
return(EvaluateBezier(interpolationData.first, interpolationData.second, interpolationData.value));
}
if (keyframes.Count > 0)
{
if (time < keyframes[0].time)
{
return(keyframes[0].Position);
}
else
{
return(keyframes[keyframes.Count - 1].Position);
}
}
return(defaultPosition);
}
public static Color GetColor(List <ColorKeyframe> keyframes, double time, Color defaultColor)
{
InterpolationSet <ColorKeyframe> interpolationData = Interpolate(keyframes, time);
if (interpolationData != null)
{
return(Color.Lerp(interpolationData.first.LightColor, interpolationData.second.LightColor, interpolationData.value));
}
if (keyframes.Count > 0)
{
if (time < keyframes[0].time)
{
return(keyframes[0].LightColor);
}
else
{
return(keyframes[keyframes.Count - 1].LightColor);
}
}
return(defaultColor);
}
public void TestExponentialInterpolationInvalidParameters(InterpolationSet set)
{
Assert.That(() => new InterpolationCalculator().CalculateExponential(set),
Throws.TypeOf <ArgumentOutOfRangeException>());
}
public void TestExponentialInterpolation(InterpolationSet set, double expectedResult)
{
Assert.AreEqual(expectedResult, new InterpolationCalculator().CalculateExponential(set));
}