private void canvas_pic_MouseClick(object sender, MouseEventArgs e)
{
if (!KnotIsClosed)
{
Point newP = new Point(e.X, e.Y);
newP = new Point(e.X, e.Y);
MovablePoint movPoint = new MovablePoint(newP);
//movPoint.MouseMove += MovPoint_MouseMove;
if (e.Button == MouseButtons.Left || e.Button == MouseButtons.Right)
{
CrossingType crossType = e.Button == MouseButtons.Left ? CrossingType.Under : CrossingType.Over;
//char charType = e.Button == MouseButtons.Left ? 'U' : 'O';
points.Add(movPoint);
canvas_pic.Controls.Add(movPoint);
if (points.Count >= 2)
{
MovablePoint beforeLast = points.Skip(points.Count - 2).First();
Line line = new Line(beforeLast, movPoint);
MovablePoint last = points.Last();
List <Point> interPoints = new List <Point>();
bool doNotCross = true;
for (int i = 0; i < lines.Count; i++)
{
Point?p = line.Intersect(lines[i]);
if (p.HasValue)
{
if (!lines[i].Intersections.Any(ip => ip.Distance(p.Value) <= 5))
{
interPoints.Add(p.Value);
IntersectionPoint p1 = new IntersectionPoint(p.Value, crossType);
IntersectionPoint p2 = new IntersectionPoint(p.Value, crossType == CrossingType.Over ? CrossingType.Under : CrossingType.Over);
p1.gaussCross = crossType == CrossingType.Over ? indexCross : -indexCross;
p2.gaussCross = -p1.gaussCross;
indexCross++;
line.Intersections.Add(p1);
lines[i].Intersections.Add(p2);
lines[i].OrderPoints();
doNotCross = false;
int indexOfLine = renderingOrder.IndexOf(lines[i]);
if (p1.CrossingType == CrossingType.Over)
{
renderingOrder.Insert(indexOfLine + 1, p1);
renderingOrder.Add(line);
}
else
{
renderingOrder.Insert(indexOfLine, p1);
renderingOrder.Insert(indexOfLine, line);
}
}
}
}
if (doNotCross)
{
renderingOrder.Add(line);
}
line.OrderPoints();
lines.Add(line);
//if (interPoints.Count > 0)
// gaussCode_txt.Text += new string(charType, interPoints.Count);
}
}
this.Invalidate();
}
}
public Line(MovablePoint start, MovablePoint finish)
{
Start = start;
Finish = finish;
Intersections = new List <IntersectionPoint>();
}
