Catch entities which intersected with a polyline

[MECODER]

Hi All,

I have good experince with VB.Net, But i am new in prgramming for Autocad .

I had wrote code that catch all polylines on drawing, but now i have a  problem, i need to catch that entities (blocks in my case) which intersected  with each polyline.

any help please.

Thank you in advance.

[mzakiralam · Accepted solution]

Hi , to get intersection point between to entities you have to use 'entity.IntesectWith' function. With this function, you can get intersecting point. if for an entity if you get intersection point , you can add that entity in your list or array. you can have a look on below link where you can find how intersection point can be found between 2 entities.

http://forums.autodesk.com/t5/NET/Find-intersection-point-of-two-lines/m-p/4769671#M38812

[MECODER]

Thank you very much Mr. mzakiralam
This is good try.
I know how to get intersection points using (IntersectWith) function, My problem is how to specify the type of the entity that intersects with the polyline.

[mzakiralam]

 entity.GetType() will help you to get entity type. you can also use below function.

Dim ent as entity = transaction.GetObject(ObjectId, OpenMode.Write)

If TypeOf ent is Polyline

'do as you want

End If