algorithmic modeling for Rhino
Good News Everyone!
Three years ago I released the first offering of Dog Treat, a dog bone corner generator for Grasshopper. It’s saved me (and hopefully a lot of other people) a tremendous amount of time creating them by hand. Dog Treat was far from perfect, however it was good enough to use almost daily.
Three years is a long time. Since 2016 my Gh knowledge has expanded and I’ve seen how dodgy some of the scripting is. With this in mind I started work on a new build. Many things have been tweaked and some things have been rebuilt from the ground up.
Everything has been designed to be leaner and be a general solution to the problem of creating dog bone corners on geometry for quick, efficient and safe CNC fabrication.
Some of these things are:
I’ll continue to update Dog Treat as the need arises, it’s become somewhat of a hobby now. Maybe one day it will become part of a Plug-in… once I learn to code it though!
Here's a tool I've been working on for the past 4 months or so in my free time. It's a dog bone corner generator, however it's a little different to some of the existing ones. It's designed to be used for large amounts of geometry and as such, it avoids using any curve boolean operations that are computationally taxing. You don't have to split your curves up into internal and external lots either, it works it all out so you can be lazy. I've also incorporated Lunch Box's Object Bake Component for a one click operation that bakes geometry back out to Internal and External profile layers.
Let me know how it goes, will update where necessary.
06/11/19 - Version 2.0 SECOND DINNER - Rebuild
29/09/17 - Version 1.3 - Now with smooth corners option, True for smooth default/False for original
18/05/17 - Version 1.2 - Now includes variable angle domain input (defaults at 90°) for angled corners
13/11/16 - slight change to enable acceptance of very large interior curves
You know this isn't a dog bone?
Thank you very much for sharing it. I am trying to make it work, but it does not. Am I doing anything wrong?
Hey Roberto, did you manage to get it to work?
What units and tolerances are you using Tom?
Hi Roberto, it could be a mixture of the units you're working in and your Rhino's Absolute tolerance settings. I'll have a look at making the tool more compatible with non-metric unit systems and different tolerances.
for waffle projects it might be preferable to just extend the slots by the radius of the cutter used to cut the panels as this is not seen when the panels are assembled.
The Bowerbird plugin has this feature.
Heya great work. I have found it works on 90 degree corners sweet but not on less than 90 or more than 90, is that correct? Cheers
Great work! Thanks for sharing it.
I ran into some issues so I made a few tweaks to my preference.
1. Uses inside offset to dispatch curves. More consistent for complex geometry such as waffle curves.
2. Adds through opening to sharp corners. This makes circles at sharp corners reachable by tool path.
3. Merges overlapping circles. Keeps the curve clean at narrow openings.
4. Takes independent fillet radius.
Download links (attachment didn't work):
I'm glad you found the tool useful. I had a look at yours and found some parts interesting.
With regards to:
1. Offset curve is notorious for adding unnecessary computational time to a script as it increases the complexity of the curves it offsets (most of the time). As speed was an important factor for me I chose my option. That being said I don't make many waffle structures.
2. Your through opening inspired me to create my version. As I mention above, a through opening like yours is risky as it leads to potentials for part burning and will blunt your bits faster. I wanted to avoid this so went with mine. I also believe a consistent visual language is nice. I'd suggest rebuilding it without Region Unions as it makes your script very slow. I also found a case where your version splits the curves into multiple smaller closed curves. I'm not sure what that's about but it's probably due to data management.
3. If your having to merge overlapping circles I would say you're using the wrong diameter bit for the job. If you material thickness varies it could also lead to part movement. However if that's all you have it's a good solve.
4. I removed the option for filleting corners. I often needed some to be sharp so just started doing it myself.
5. I removed all that angle stuff and just have it do it by default. It was always made pretty crappily by myself. It was annoying to use and visually bulky so it went.
Go nuts on my new one, it's more complicated but runs heaps quicker. It give me the Power to Make many things!