Hi Wout, I want to implement hatch like AutoCad ( on screen , by clicking point inside any close object). In my Case there are n number of lines forming x number of polygons whose coordinates I dont know. How can I identify close polygon surrounding mouse click point..? Regards, Suhas

Hi Suhas, See if you can use method WW.Math.Geometry.Polygon2D.IsInside(), which returns whether a point is inside a polygon. Wout

Hi Wout, Thanks for quick reply, But to use that function I need to know polygon points, which I dont know bcoz , polygons get form at run time by intersection of lines. Regards, suhas

Hi Suhas, You can use Segment2D.GetIntersection and Line2D.GetIntersection to calculate intersection points. Wout

Hi Wout, But in that case I will get n intersections points, how I will determine which points are forming close polygon..? Regards, Suhas

I don't know... the stakeholders that requested you this feature probably can explain you what they want exactly. If not, then you can't build it! Wout

Ok. Thanks... Regards, Suhas