private PathControlPoint addControlPoint(Vector2 position)
{
position -= HitObject.Position;
int insertionIndex = 0;
float minDistance = float.MaxValue;
for (int i = 0; i < controlPoints.Count - 1; i++)
{
float dist = new Line(controlPoints[i].Position, controlPoints[i + 1].Position).DistanceToPoint(position);
if (dist < minDistance)
{
insertionIndex = i + 1;
minDistance = dist;
}
}
var pathControlPoint = new PathControlPoint {
Position = position
};
// Move the control points from the insertion index onwards to make room for the insertion
controlPoints.Insert(insertionIndex, pathControlPoint);
HitObject.SnapTo(snapProvider);
return(pathControlPoint);
}
private void removeControlPoints(List <PathControlPoint> toRemove)
{
// Ensure that there are any points to be deleted
if (toRemove.Count == 0)
{
return;
}
foreach (var c in toRemove)
{
// The first control point in the slider must have a type, so take it from the previous "first" one
// Todo: Should be handled within SliderPath itself
if (c == controlPoints[0] && controlPoints.Count > 1 && controlPoints[1].Type == null)
{
controlPoints[1].Type = controlPoints[0].Type;
}
controlPoints.Remove(c);
}
// Snap the slider to the current beat divisor before checking length validity.
HitObject.SnapTo(snapProvider);
// If there are 0 or 1 remaining control points, or the slider has an invalid length, it is in a degenerate form and should be deleted
if (controlPoints.Count <= 1 || !HitObject.Path.HasValidLength)
{
placementHandler?.Delete(HitObject);
return;
}
// The path will have a non-zero offset if the head is removed, but sliders don't support this behaviour since the head is positioned at the slider's position
// So the slider needs to be offset by this amount instead, and all control points offset backwards such that the path is re-positioned at (0, 0)
Vector2 first = controlPoints[0].Position;
foreach (var c in controlPoints)
{
c.Position -= first;
}
HitObject.Position += first;
}