private void Update()
{
if (!isDragging)
{
return;
}
// todo: skips points, should check if next point is in close proximity etc.
// todo: does not work well with self-intersecting paths
var newPosition = (Vector2)Input.mousePosition - new Vector2(Screen.width / 2f, Screen.height / 2f) - dragOffset;
var distances = evenlySpacedPoints.Select(p => Vector2.Distance(p, newPosition)).ToArray();
var distance = distances.Min();
var accuracy = 1f - distance / accuracyThreshold;
if (accuracy <= 0)
{
isDragging = false;
OnDragStopped?.Invoke(false, startPointIndex, evenlySpacedPoints.Count);
return;
}
var index = Array.IndexOf(distances, distance);
switch (dragDirection)
{
case DragDirection.OnlyForward when index <= startPointIndex:
case DragDirection.OnlyBackward when index >= startPointIndex:
return;
}
startPointIndex = index;
UpdatePosition();
UpdateRotation();
OnDragProgress?.Invoke(accuracy, startPointIndex, evenlySpacedPoints.Count);
// todo: works only if dragDirection = forward
if (startPointIndex == evenlySpacedPoints.Count - 1)
{
OnDragStopped?.Invoke(true, startPointIndex, evenlySpacedPoints.Count);
}
}
public void OnPointerUp(PointerEventData eventData)
{
isDragging = false;
OnDragStopped?.Invoke(false, startPointIndex, evenlySpacedPoints.Count);
}
