Grasshopper

algorithmic modeling for Rhino

How to use CurveSurface interection?


Hi, i have some problems using this function in a VB component, eg:
Dim TestCrv As Curve
Dim TestSrf As Surface
New Intersection.CurveSurface(TestCrv, TestSrf, doc.ModelAbsoluteTolerance, doc.ModelAbsoluteTolerance)

The SDK says:

Public Shared Function CurveSurface ( _
       curve As Curve, _
   surface As Surface, _
     tolerance As Double, _
 overlapTolerance As Double _
) As CurveIntersections

Return Value A list of intersection events.

1 - What kind of intersection events? I need to test a boolean value about intersection True/False, but I don't fully understand how to use this list of value
2 - what is the overlap tolerance?
Thanks
Paolo

Views: 415

Replies to This Discussion

Permalink Reply by David Rutten on April 20, 2011 at 3:37am

Hi Paolo,

 

CurveSurface() is a function and as such you cannot say New Intersection.CurveSurface(). Functions can only be called, not constructed.

 

Intersection.CurveSurface() returns an instance of the CurveIntersections class. So to use this function you need to type:

 

Dim csx As CurveIntersections = Intersection.CurveSurface(crv, srf, 0.01, 0.05)

Dim pts As New List(Of Point3d)

For i As Int32 = 0 To csx.Count-1

  pts.Add(csx(i).PointA)

Next

 

This collects all the start-points of all intersection events.

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Paolo Cappelletto on April 20, 2011 at 8:39am
Thanks David, I will try.P
Permalink Reply by Paolo Cappelletto on April 20, 2011 at 9:16am

construct a function...

This time I went totally out of mind.

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