private void calculatePath()
{
calculatedPath.Clear();
// Sliders may consist of various subpaths separated by two consecutive vertices
// with the same position. The following loop parses these subpaths and computes
// their shape independently, consecutively appending them to calculatedPath.
int start = 0;
int end = 0;
for (int i = 0; i < ControlPoints.Length; ++i)
{
end++;
if (i == ControlPoints.Length - 1 || ControlPoints[i] == ControlPoints[i + 1])
{
ReadOnlySpan <Vector2> cpSpan = ControlPoints.Slice(start, end - start);
foreach (Vector2 t in calculateSubpath(cpSpan))
{
if (calculatedPath.Count == 0 || calculatedPath.Last() != t)
{
calculatedPath.Add(t);
}
}
start = end;
}
}
}