public static void GetSegmentFromPointIndex(PathFigure pathFigure, int pointIndex, out int segmentIndex, out int segmentPointIndex)
{
PathSegmentCollection segments = pathFigure.Segments;
if (pointIndex == 0)
{
if (pathFigure.IsClosed && PathFigureUtilities.IsCloseSegmentDegenerate(pathFigure))
{
segmentIndex = pathFigure.Segments.Count - 1;
segmentPointIndex = PathSegmentUtilities.GetPointCount(segments[segmentIndex]) - 1;
}
else
{
segmentIndex = 0;
segmentPointIndex = -1;
}
}
else
{
segmentIndex = 0;
segmentPointIndex = 0;
int num = 1;
int pointCount = PathSegmentUtilities.GetPointCount(segments[segmentIndex]);
while (pointCount < pointIndex)
{
num = pointCount + 1;
pointCount += PathSegmentUtilities.GetPointCount(segments[++segmentIndex]);
}
segmentPointIndex = pointIndex - num;
}
}
public static int PointCount(PathFigure figure)
{
int num = 1;
foreach (PathSegment segment in figure.Segments)
{
num += PathSegmentUtilities.GetPointCount(segment);
}
if (PathFigureUtilities.IsClosed(figure) && PathFigureUtilities.IsCloseSegmentDegenerate(figure))
{
--num;
}
return(num);
}
public static void SetPoint(PathFigure pathFigure, int pointIndex, Point point)
{
if (pointIndex == 0 || pointIndex == PathFigureUtilities.PointCount(pathFigure) && PathFigureUtilities.IsClosed(pathFigure) && !PathFigureUtilities.IsCloseSegmentDegenerate(pathFigure))
{
pathFigure.StartPoint = point;
}
else
{
PathSegmentCollection segments = pathFigure.Segments;
int segmentIndex;
int segmentPointIndex;
PathFigureUtilities.GetSegmentFromPointIndex(pathFigure, pointIndex, out segmentIndex, out segmentPointIndex);
PathSegmentUtilities.SetPoint(segments[segmentIndex], segmentPointIndex, point);
}
}