private static Vector3 InterpolatePosition(TweenStep from, TweenStep to, float t, bool useBezier)
{
t = from.curve.Evaluate(Mathf.Clamp01(t));
if (useBezier)
{
var p0 = from.transform.position;
var p1 = from.transform.position + from.tangent;
var p2 = to.transform.position - to.tangent;
var p3 = to.transform.position;
var p01 = Vector3.Lerp(p0, p1, t);
var p12 = Vector3.Lerp(p1, p2, t);
var p23 = Vector3.Lerp(p2, p3, t);
var p012 = Vector3.Lerp(p01, p12, t);
var p123 = Vector3.Lerp(p12, p23, t);
return(Vector3.Lerp(p012, p123, t));
}
else
{
return(Vector3.Lerp(from.transform.position, to.transform.position, t));
}
}
/// <summary>
/// Stops the tween and samples it at index and value t (range 0 to 1).
/// 0 means TweenStep at index, 1 TweenStep at index + 1 and 0.5 means halfway both.
/// </summary>
/// <param name="index"></param>
/// <param name="t"></param>
public void SampleAt(int index, float t)
{
from = steps[Mathf.Clamp(index, 0, steps.Count - 1)];
to = steps[Mathf.Clamp(index + 1, 0, steps.Count - 1)];
Interpolate(t);
enabled = false;
}
/// <summary>
/// Play tween at this setp index.
/// </summary>
/// <param name="index"></param>
public void PlayForward(int index)
{
from = steps[Mathf.Clamp(index, 0, steps.Count - 1)];
to = steps[Mathf.Clamp(index + 1, 0, steps.Count - 1)];
timer = 0.0f;
enabled = true;
}
private void SetupFromIndex(int index, int offset)
{
from = steps[Mathf.Clamp(index, 0, steps.Count - 1)];
to = steps[Mathf.Clamp(index + offset, 0, steps.Count - 1)];
direction = offset;
from.onEnter.Invoke();
enabled = true;
}
private static Quaternion InterpolateRotation(TweenStep from, TweenStep to, float t)
{
t = from.rotationCurve.Evaluate(Mathf.Clamp01(t));
return(Quaternion.Slerp(from.transform.rotation, to.transform.rotation, t));
}