} // end of function
//makes intersections and returns the two polygon2ds after intersection
internal static Dictionary <string, object> MakeIntersections(List <Point2d> poly, Line2d splitLine, double space = 0)
{
List <Point2d> intersectedPoints = GraphicsUtility.LinePolygonIntersection(poly, splitLine);
//List<Point2d> intersectedPoints = TestGraphicsUtility.LinePolygonIntersectionIndex(poly, splitLine);
// find all points on poly which are to the left or to the right of the line
List <int> pIndexA = new List <int>();
List <int> pIndexB = new List <int>();
for (int i = 0; i < poly.Count; i++)
{
bool check = ValidateObject.CheckPointSide(splitLine, poly[i]);
if (check)
{
pIndexA.Add(i);
}
else
{
pIndexB.Add(i);
}
}
//organize the points to make closed poly
List <Point2d> sortedA = PointUtility.DoSortClockwise(poly, intersectedPoints, pIndexA);
List <Point2d> sortedB = PointUtility.DoSortClockwise(poly, intersectedPoints, pIndexB);
/*List<Polygon2d> splittedPoly = new List<Polygon2d>();
* if (space == 0) splittedPoly = new List<Polygon2d> { new Polygon2d(sortedA, 0), new Polygon2d(sortedB, 0) };
* else
* {
* sortedA = PolygonUtility.SmoothPolygon(new Polygon2d(sortedA,0).Points, space);
* sortedB = PolygonUtility.SmoothPolygon(new Polygon2d(sortedB,0).Points, space);
* splittedPoly = new List<Polygon2d> { new Polygon2d(sortedA, 0), new Polygon2d(sortedB, 0) };
* }
*/
List <Polygon2d> splittedPoly = new List <Polygon2d> {
new Polygon2d(sortedA, 0), new Polygon2d(sortedB, 0)
};
return(new Dictionary <string, object>
{
{ "PolyAfterSplit", (splittedPoly) },
{ "IntersectedPoints", (intersectedPoints) },
{ "PointASide", (sortedA) },
{ "PointBSide", (sortedB) }
});
}
public static Dictionary <string, object> SplitByLine(Polygon2d polyOutline, Line2d inputLine, double distance = 5)
{
if (!ValidateObject.CheckPoly(polyOutline))
{
return(null);
}
List <Point2d> polyOrig = polyOutline.Points;
List <Point2d> poly = PolygonUtility.SmoothPolygon(polyOrig, BuildLayout.SPACING);
Line2d splitLine = new Line2d(inputLine);
Point2d centerPoly = PointUtility.CentroidInPointLists(poly);
bool checkSide = ValidateObject.CheckPointSide(splitLine, centerPoly);
int orient = ValidateObject.CheckLineOrient(splitLine);
if (orient == 0)
{
if (!checkSide)
{
splitLine = LineUtility.Move(splitLine, 0, -1 * distance);
}
else
{
splitLine = LineUtility.Move(splitLine, 0, 1 * distance);
}
}
else
{
if (checkSide)
{
splitLine = LineUtility.Move(splitLine, -1 * distance, 0);
}
else
{
splitLine = LineUtility.Move(splitLine, 1 * distance, 0);
}
}
Dictionary <string, object> intersectionReturn = MakeIntersections(poly, splitLine, BuildLayout.SPACING);
List <Polygon2d> splittedPoly = (List <Polygon2d>)intersectionReturn["PolyAfterSplit"];
return(new Dictionary <string, object>
{
{ "PolyAfterSplit", (splittedPoly) },
{ "SplitLine", (splitLine) }
});
}
