I am going to get serious for a few paragraphs, but don’t worry. It will lighten up and there will be cats. Today, in the United States, is Martin Luther King Jr. Day. It is a federal holiday celebrating the life and work of MLK Jr. The world has changed significantly since the 60s — and I don’t … Continue reading On equality, with a digression into toys
As a followup from my previous OpenGL post: I have now successfully rendered an external STL file (a 3D printer object) using OpenGL. And what better model than the Octocat? Warning: nerd talk ahead. Stop reading if you don’t care about the nerdy details. It turns out that I can’t de-dupe the points as I thought I could. The same … Continue reading Further adventures in OpenGL: Octocat
I thought I would teach myself some OpenGL during this holiday week. For the uninitiated, OpenGL is the common core 3D rendering that all recent video cards support. Unless you’re doing game development or scientific visualizations, you typically don’t need to mess with it. (And even game developers frequently use higher-level tools to hide the picky … Continue reading Experiments in OpenGL
I do a lot of design work for 3D printing (see also: the MakerBot category on this blog). For some reason, I keep finding myself repeatedly doing a lot of math related to hexagons and the triangles that compose them. The first few times, I did the trigonometry by hand. Over time, I offloaded that to Google searches, but the results varied in … Continue reading Hex math cheat sheet
This past week, the engineering department of my company (Elemental Technologies — we’re hiring engineers, by the way) had our annual off-site. This year we did something a little different and had a Lego competition. The previous week, we were given time with the Lego Mindstorms kits to get familiar with the components and programming language. The exact nature … Continue reading On 3D Printing Lego Robot Accessories
Last Halloween I built some animated light-up steampunk/mad-scientist goggles. This year, I finally got around to documenting the project.
Zheng3’s Kickstarter project is to design 3D printable medieval armor for Barbie dolls. I see this as being a great transition to help girls ease their doll play from “let’s go shopping” to a much more active and kick-ass “let’s fight that nasty dragon and save the village.”
I needed a way to mount a Trinket and power jack, so I designed and printed one.
When working with 3D printers, you start with an object file. The object is a solid chunk of 3D geometry. To get that out to the printer, it needs to be “sliced” into layers. This is similar to a laser printer. There, you start with a PDF or PostScript that defines a circle here and a wavy line over there, … Continue reading Octocat MRI
After the initial failure described in yesterday’s blog post about the RatRacer, I thought I would scale down the problem a bit. I figured it would be easier to iterate through design tweaks when big parts took 20 minutes to print versus 120 minutes per part. If I ended up with a sound design for the mousetrap car, then I could scale it up … Continue reading Son of RatRacer: Mouse Car