private void TraceVRightLines(List <BorderPoint> points, HashSet <BorderLine> result)
{
int index = 0, y1, y2, x, start;
while (points.Count > index)
{
start = index;
x = points[index].mX;
y1 = points[index].mY;
y2 = y1;
do
{
y1 = y2;
index++;
if (points.Count > index)
{
y2 = points[index].mY;
}
else
{
break;
}
} while ((y2 - y1 == 1) && (points[index].mX == x) && (index < points.Count));
index--;
BorderLine line = new BorderLine(new Point(points[start].mX + 1, points[start].mY), new Point(points[index].mX + 1, points[index].mY + 1));
Thread.MemoryBarrier();
result.Add(line);
index++;
}
}
private void TraceHBottomLines(List <BorderPoint> points, HashSet <BorderLine> result)
{
int index = 0, x1, x2, y, start;
while (points.Count > index)
{
start = index;
y = points[index].mY;
x1 = points[index].mX;
x2 = x1;
do
{
x1 = x2;
index++;
if (points.Count > index)
{
x2 = points[index].mX;
}
else
{
break;
}
} while ((x2 - x1 == 1) && (points[index].mY == y) && (index < points.Count));
index--;
BorderLine line = new BorderLine(new Point(points[start].mX, points[start].mY + 1), new Point(points[index].mX + 1, points[index].mY + 1));
Thread.MemoryBarrier();
result.Add(line);
index++;
}
}
private GraphicsPath BuildPath(HashSet <BorderLine> lines)
{
lines = new HashSet <BorderLine>(lines);
GraphicsPath path = new GraphicsPath();
int x;
BorderLine points = lines.First();
path.StartFigure();
path.AddLine(points.mStart, points.mEnd);
lines.Remove(points);
while (lines.Count > 0)
{
x = lines.Count;
foreach (BorderLine line in lines.Where(line => path.GetLastPoint() == (PointF)line.mStart))
{
path.AddLine(line.mStart, line.mEnd);
lines.Remove(line);
break;
}
if (x == lines.Count)
{
path.StartFigure();
points = lines.First();
path.AddLine(points.mStart, points.mEnd);
lines.Remove(points);
}
}
return(path);
}