algorithmic modeling for Rhino
mirroring a line
Hi, I do not understand what is happening when I try to mirror a polyline. i have a 'profileA' and I want to mirror it to get 'profileB'. when i do the following both profiles end up in the mirrored position. Why is that? How could I make a copy of the first profile and then freely manipulate it without effecting the original?
Dim profileA As New Polyline(listofpoints)
Dim profileB As New Polyline
profileB = profileA
Dim Xmirrorprofile As transform = transform.Mirror(centerpoint, normalvector)
profileB.Transform(Xmirrorprofile)
i had to go around it by defining the profileB with the same list of points, but I would like to understand what is happening in the first case for future application...
Dim profileB As New Polyline(listofpoints)
Any help appretiated.
Stepan
Views: 835
Replies to This Discussion
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Permalink Reply by David Rutten on
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Polyline is a Reference Type (better known as a "class"). Therefore when you say:
profileB = profileA
both variables now reference the same polyline. Therefore if you change one, you also change the other. You need to make a specific duplicate of the polyline if you want to distinct instances.
Dim profileA As New Polyline(listofpoints)
Dim profileB As New Polyline(listofpoints)
--
David Rutten
david@mcneel.com
Poprad, Slovakia
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Permalink Reply by steps79 on
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Ok, I was thinking that something like that was happening.
Would there be a way how to duplicate an instance without recreating it from scratch - points?
For example if I input a curve into my VB from rhino and then I would want to duplicate it.
(AsVal inputcurve as curve)
dim curve1 as new curve = ? (...copy of inputcurve)
dim curve2 as new curve = ? (...copy of inputcurve)
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