RhinoCommon - Rhinoe.Geometry.Transform

With VB.Net in RhinoCommon, what is the syntax for changing multiple properties of the Transform class? (and I'm sure there are other classes that have this issue). With the old vb.net you could say:

dim MyXform as New OnXform

Then you could effect any property by calling it:

MyXform.Rotation(...)

MyXform.Translation(...)

But now, with the Rhino.Geometry.Transform Class, the only way I can figure out to set properties is :

Dim MyTransform as New Rhino.Geometry.Transform

MyTransform = Rhino.Geometry.Transform.Translation(........)

And the only way to also do rotation or scale is to make an entirely new transform object and call another property like .Scale(...)

This seems inefficient.

What am I missing?

Thanks.

daniel

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Permalink Reply by David Rutten on July 16, 2010 at 3:42pm

Hi Daniel,

you don't actually have to construct the transforms. You can say something like this:

Dim xform As Transform

xform = Transform.Translation(...)

geo.Transform(xform)

xform = Transform.Scale(...)

geo.Transform(xform)

Or, better yet:

geo.Transform(Transform.Translation(...))

geo.Transform(Transform.Scale(...))

Creating a Transformation matrix is hardly an intensive operation, don't worry about it being inefficient, it's not. Also, the new Transform is no longer a class, it's a value type.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

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Permalink Reply by Daniel Caserta Segraves on July 16, 2010 at 4:09pm

Thanks David, much appreciated.

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Permalink Reply by Woo Jae Sung on August 20, 2010 at 7:49am

I got it, never mind! Thanks!

David- Am I missing something? With the code below, I got a boolean value at A.

Private Sub RunScript(ByVal x As Brep, ByRef A As Object, ByRef B As Object)

Dim xform As Transform = Transform.Translation(0, 0, 1)

A = x.Transform(xform)

End Sub

Thanks!