Grasshopper

algorithmic modeling for Rhino

Curves in VB

I'm shifting around shapes using a vb script.

It seems easy enough to move and rotate a curve using curve.translate() or curve.rotate(), but curve.scale() does not let you specify a base point. I'm working around this by shifting each instance to 0,0,0 scaling, then putting it back into position.

Is there a better way to do this kind of task?

Views: 414

Replies to This Discussion

Permalink Reply by David Rutten on July 24, 2015 at 10:55am

Yep, you should use the Transform method. Transform matrices can encode any number of moves, rotates, scales, shears and tapers.

Permalink Reply by vaughn horsman on July 24, 2015 at 11:27am

Thanks David, 

I was dreading that answer. I'm going to go read the transform matrix explanation for the 15th time.you never know, it might suddenly start making sense.

Permalink Reply by Nik Willmore on July 24, 2015 at 1:47pm

Less cryptic answer from David, and a Python example of not having to deal with the matrix itself, since Rhinocommon is full of Transform helper commands that build the matrix for you:

http://www.grasshopper3d.com/forum/topics/rhinocommon-3?commentId=2...

Permalink Reply by Daniel González Abalde on July 24, 2015 at 2:15pm

YourCurve.Transform(transform.Scale(Anchor, ScaleFactor))

Permalink Reply by vaughn horsman on July 30, 2015 at 4:35am

Thanks! that's really helpful. for those of us without a complex maths component built into our brain.

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