private myPolygon GetUnionWithIntersectedPolygons(myPolygon polygon, Graphics graphics, Pen pen, bool paint_or_not)
{
myPolygon copy_of_this_with_intersected_points = this.GetIntersectionWith(polygon);
myPolygon copy_of_second_with_intersected_points = polygon.GetIntersectionWith(this);
Boolean[] points_of_this_which_are_in_result = new Boolean[copy_of_this_with_intersected_points.vertexes.Count];
for (int i = 0; i < copy_of_this_with_intersected_points.vertexes.Count; i++ )
if(copy_of_second_with_intersected_points.ContainInAreaONLY(copy_of_this_with_intersected_points.vertexes[i]))
points_of_this_which_are_in_result[i] = true;
int count_vertexes_in_second = copy_of_second_with_intersected_points.vertexes.Count;
for (int i = 1; i < count_vertexes_in_second; i++)
copy_of_second_with_intersected_points.vertexes.Add(copy_of_second_with_intersected_points.vertexes[i]);
copy_of_second_with_intersected_points.vertexes.Add(copy_of_second_with_intersected_points.vertexes[0]);
//основной обход
myPolygon result = copy_of_this_with_intersected_points.Round_ver(copy_of_second_with_intersected_points, 0, graphics, pen);
for (int i = 0; i < copy_of_this_with_intersected_points.vertexes.Count; i++)
for (int j = 0; j < result.vertexes.Count; j++)
if (copy_of_this_with_intersected_points.vertexes[i].Equals(result.vertexes[j]))
points_of_this_which_are_in_result[i] = true;
pen = new Pen(Color.BlueViolet, 4);
//выкалываем дыры
List<myPolygon> holes = new List<myPolygon>();
Boolean i_can_go_away = false;
while (!i_can_go_away)
{
for (int i = 0; i < copy_of_this_with_intersected_points.vertexes.Count; i++)
if (points_of_this_which_are_in_result[i] == false)
{
myPolygon Hole = copy_of_this_with_intersected_points.Round_ver(copy_of_second_with_intersected_points, i, graphics, pen);
holes.Add(new myPolygon(Hole));
for (int k = 0; k < copy_of_this_with_intersected_points.vertexes.Count; k++)
for (int j = 0; j < Hole.vertexes.Count; j++)
if (copy_of_this_with_intersected_points.vertexes[k].Equals(Hole.vertexes[j]))
points_of_this_which_are_in_result[k] = true;
i_can_go_away = false;
}
else
i_can_go_away = true;
}
if (paint_or_not)
result.Fill(graphics, Color.Brown, Color.White, holes);
return result;
}