get intersection point problem

[Anonymous]

hi, i'm having problem with the intersectwith function

It maybe a simple problem for you guys, but I can't find the answer for this problem

I tried to keep the intersection point of two lines in a variable of point2d named poinintersection as shown below

dim pointintersection as point2d

pointintersection = lineseg1.IntersectWith(lineseg2)

but then it resulted error

Value of type '1-dimensional array of Autodesk.AutoCAD.Geometry.Point2d' cannot be converted to 'Autodesk.AutoCAD.Geometry.Point2d'.

so, what should i do to get the intersection point using intersectwithfunction ?

thank you

[Marat.Mirgaleev]

Hi,

   The IntersectWith() method returns an array of intersection points. You simply need to declare your pointintersection as an array:

dim pointintersection as point2d()  ' Note the parenthesis here

[Anonymous]

I don't understand, why it returns an array of intersection points ? Is it possible that two lines have more than one intersection point ?

and then, now the intersectwith method results (Nan,Nan)

do you know what probably wrong ?

thanks for your help

[Marat.Mirgaleev]

It's because Line is derived from Curve.

Two curves in general may have many points of intersection.

You need to iterate through the returned array of points.

Why it's (Nan, Nan) - please, double check that the line segments really do intersect 🙂

[Anonymous]

problem solved, thank you for your help !