Incrementally scaled geometry

Replies to This Discussion

Permalink Reply by johnnyUtah05 on July 23, 2015 at 12:01pm

Hello Salvador, 

Is this what you are seeking? If you want the the triangles to overlap from the center you can use the average point for an x transformation as well. 

Cheers, 

Erik

Permalink Reply by Joseph Oster on July 23, 2015 at 1:02pm

I stumbled around in circles for awhile on this one...  I skipped "along a curve" because that implies orienting each copy so that both of its ends are on a "curve"; more complicated than just putting them all in a straight line.

I scaled all the copies in place, then moved each one in 'X' by the sum of the distance between end points of its predecessors.

Attachments:

• scaling_2015Jul23a.gh, 12 KB

Permalink Reply by johnnyUtah05 on July 23, 2015 at 2:05pm

Salvador, 

Here is a solution along a curve. I believe you mentioned that. Or did you want an attractor curve to control the scaling? I am unclear on your meaning.

 

Permalink Reply by Joseph Oster on July 23, 2015 at 3:29pm

Erik - Are you scaling only height?  (I don't read hieroglyphics)

Permalink Reply by johnnyUtah05 on July 23, 2015 at 3:35pm

Hey Joseph,

Yes it appears so. It probably makes more sense to scale the whole geometry like you have

. By hieroglyphics you mean the icons?

Permalink Reply by Salvador Gabriel on July 23, 2015 at 3:40pm

Hey Erik, thanks for the time, thats kind of what I want, but i certainly need to scale the whole geometry, not only heigth, so that way the angle between each V columns can be the same. Please see the response to Joseph, I think I made it more clear.

Cheers.

Permalink Reply by Salvador Gabriel on July 23, 2015 at 3:36pm

Hey thanks Joseph, sorry I mentioned "along a curve" because it actually is, but for this purpose I set it to a straight line. Your definition seems to solve one of my problems, but I need more control over the scale factor, I mean I have these two curves; one is for the base, and the second one defines my initial and last heigth, so I have to scale them between these curves. The picture below shows the real situation, that was a test I did but is not what I want beacause the angle between each column is different. I hope I've been clear, and thanks a lot for the time.

cheers.

Permalink Reply by Joseph Oster on July 23, 2015 at 6:49pm

Uh...  I'm sure this is one of the classic CAD riddles that amuses the experts as they watch us re-invent the algorithm(s).  :)

• scaling_2015Jul23b.gh fixes an off-by-one error that duplicated the last shape.
  
• scaling_2015Jul23d.gh suggests the probable course (?) to solving this one, along an arbitrary curve?
  

Attachments:

• scaling_2015Jul23b.gh, 14 KB
• scaling_2015Jul23d.gh, 17 KB

Permalink Reply by johnnyUtah05 on July 23, 2015 at 9:09pm

I think what you have stated is that you want controlled scale, equal angled, triangles between a set of curves. Here is one way to do that (if, of course, that is your intention). Pardon the annotation coding as its longer than the actual definition. 

Permalink Reply by Salvador Gabriel on July 24, 2015 at 9:32am

Hey Erik that's exactly what I wanted, thanks a lot! My head just exploded yesterday trying to figure it out how to do it. Is it possible that you share with me this definition?

Thanks again Erik! 

Cheers

Permalink Reply by johnnyUtah05 on July 24, 2015 at 12:50pm

Hi Salvador, 

Glad I could help! Hopefully this is what you need. I have attached the definition. I always find it ironic that the annotation portion is longer than the actual definition. 

Furthermore, sorry about the confusion pertaining to the icons vs the names. I always had an easier time with the icons but certainly understand reasons for not using them - such a controversial topic :) My last professor wouldn't let us turn in definitions unless they had icons and said David originally designed Rhino's icons and that his GH icons were an extension of this. So who knows... they are quite nice. 

I had the same issue with the wrong image opening, must be a glitch. 

Attachments:

• Scaled Triangles Along Curve.gh, 18 KB

Permalink Reply by johnnyUtah05 on July 24, 2015 at 12:55pm

And an explanation of the definition. (I mostly explained it in the definition). 

It's pretty simple actually:

1. Use range and graph mapper to generate incremental t parameters and turn them into points with evaluate curve. 

2. offset the points and merge them into couplets

3. find the average (which is not on the curve) so use 'curve closest point' to mitigate this. 

4. move average point in zedd direction with measured distance between each each associated couplet branch. Then merge into triplets. 

5. I like using the Human plugin to visualize lineweights etc.. but if you don't have it, there is no need for it. 

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