I would like to present a script here, but I am genuinely stumped on this one… Is there a way to have the spacing of copies placed along a surface or curve to predictably increase over the distance of the curve. I think I can get them space evenly, but the request is for a “pinky out” artsy fanning out of the copies…
We didn’t miss anything, you did. No code, no image, no geometry to work with, no evidence that you tried, though you said “I think I can get them space evenly”. Show us!
This forum is full of examples that do “variable spacing”, often using Graph Mapper to distribute points along a curve. Did you look?
Starting with a model you post is much more likely to get the answer you want the first time instead of engaging in a protracted exchange where we guess and you say “No, that’s not quite what I meant”. How a question is presented makes all the difference so please follow the guidelines.
Okay, Here is my issue. I am afraid my dummy version of putting in a curve, and taking the divide node will be a blind path That is why I said I was stumped on the approach. I didn’t want to go down that path if it was a poor choice. I didn’t ask anyone to do the work for me.
It was stated that I could possibly use graph mapper. So I am going to try that. How hard was that? Wow… the aggro on this forum is palpable.
No worries, we all had to learn the etiquettes of this forum at some point. You will find it is a very useful and friendly forum as long as you follow the rules in that How to Help Us Help You post.
Your question is fairly straight forward but just giving people a curve to work with and some geometry that you want to copy along that curve gives people something to work with. Without that we could spend time showing you a solution and then realise it wasn’t quite what you wanted. We all initially think “What kind of curve? What geometry?” etc etc and less people are likely to help.
Anyway, you know for next time
I guessed at what you wanted from what you had written…
That was shockingly helpful and a big reveal of my ignorance. I have a question for you, since you seem very knowledgeable. Is there a good place to get training besides youtube that you would recommend? I find I have to concatenate 400 videos to get what I need, on what seem simple tasks. Or did you learn this as “Trial By Fire”?
Thank you again for that example. I would NOT have gotten there on my own. I will do my best to apply the knowledge and not just steal the solution you showed me. I am just overwhelmed with questions right now. Like your use of the expression and that you brought in the multiply node where you did. I am a modeler by trade, but not a coder, which seems a better skillset for some of this…
Okay, I’m off to break it a few dozen times, add some ideas, and see what makes that code tick.
If I could bother you one more time… You used a length node. I am used to that being a property of a curve by default. So I get confused. Does Grasshopper not know that parameter, or are you just calling that info to use it and it is already there?
This is what I am used to getting on the fly…
So I am unsure, are you “calculating” that info, or just “calling” it? I hit the help on the curve node, but I was hoping to see what data was in that node by default. (Similar to my picture) It mentions “Uncastable” data, but is there a predictable way to know what is and isn’t “castable”?
That curve was just one I created in Rhino on the fly by just drawing a spline freehand. I then referenced that curve in Grasshopper by right clicking on the Curve component and selecting “Set One Curve” and selecting the curve I drew by hand. Because I didn’t want to send you a Rhino file and a GH file, I just right clicked the Curve component again and selected “Internalise” so now that Curve component contains the curve instead of referencing one on the Rhino document.
You can reference any curve in your Rhino document the same way and that script will distribute those circles along your curve.
If you don’t want circles, right click the other Curve component and reference something else or create something in Grasshopper and plug that into the Curve component.
In terms of tutorials, I just muddled my way through it all over the years but I had some Visual Basic programming skills and some CAD skills and this forum has been amazing. There is a beginner tutorial somewhere… search Grasshopper Primer.
The hardest thing to get your head around will be the data structure. A good tip is to hover your mouse over the inputs and outputs to see the data within them. Also use the Data Viewer from the VIEW menu.
Thanks! I had been using the “Panel” to peer into nodes, but that looks more comprehensive.
I was also wondering why those extra curve nodes where in there. So that explains it well.
I think I get the multiply node now. It looks like everything was normalized to the 0 to 1 domain before that node, so by multiplying, it looks like you get all the values leading up to the actual length, versus relying on reparameterizing the other nodes. It’s a very elegant solution. My hats off to you.
I think this will be a long time to sherpa up the side of this mountain, but I am trying my best… I have had a couple successes already, using curve attractors, and the image sampler and it is interesting to see the differences in computing time given different answers to the same problem. In my mind, I pictured most of this to be real-time, but some of it it pretty intensive.