For my last birthday I got a helicopter flight, and now I wanted to make that flight before the gift certificate expires.Takeoff was in Gstegwiler near Interlaken, from where we slowly ascended passing the Männlichen to the Eiger north face. The ascend was with a constant 4 m/s climb rate, and I was not too impressed, as I flew around this area a couple of times with the paraglider. When we hovered in front of the north wall, I remembered how such a helicopter pushed me away from the wall some seven years ago. Paragliders have priority, as we’re less manouverable. It was strange for me to approach the wall head on, and then just hover. With regular aircraft that need the forward velocity (such as a paraglider) you can’t do that. When we climbed higher it got more interesting. Lots of new terrain. We saw some very interestingly built refuges. And of course the famous Jungfrau Joch from a new perspective. Also the glaciers towards the Wallis were very impressive. We flew very close to some rock walls and some glaciers. As we left the glaciers and descended along Mürren and Wengen, it felt like routine again as I’ve seen this landscape from the air a couple of times before.
Google employees can spend 20% of their working time for their own projects. We at cubx (The CAD development department recently split from BORM) have now something similar. We get to spend every second friday afternoon for some projects of our own. The only restriction is that it has to do with computer graphics.
I chose a project that I had in mind for almost as long as I have been working for BORM. I wanted to run PointLine as a web service on a linux box. Wit the old core, that was so tightly tied to MFC, this would have been impossible. But the new unfinished core is designed to be platform independent. So, I took it as a base.
Some three years ago, I looked at vrml and x3d for the 3d in browser part. These standards didn’t have as broad support as I thought. You couldn’t do much without buying proprietary browser plugins. So I never made much progress on that. But then came WebGL. All mayor Browsers support it natively, and on top of that, my favourite web application framework recently got a WebGl widget.
So far, my research prototype doesn’t do much, but I already learned a lot that I can also use in my everyday work. I gained a better understanding of rendering pipelines, learned about shaders and ray picking …
As a side project, I set up a jenkins continous integration server that compiles the project on ubuntu and windows after every commit. Additionally, I learned about CPack, so that the result of the jenkins build is a binary deb package ready to install.
You can see the web application as it progresses here:
Usually, I would also provide a link to the sources, but this is closed source, sorry…
BitCoin is a decentralized online currency. It was in the news lately. While banks and politicians made it sound bad, it’s actually a great experiment. True, it has some shortcomings, but these shouldn’t bother us for the next couple of years.
If you want to learn more about BitCoin, check out these podcasts:
Last year, I spent some time rewriting internals of how groups are handled in our CAD software. Before that, groups were just to help with the selection of elements that belong together. The grouping was only one level deep, and the elements were organized flat on the document. All the calling functions had to uptate the relationships in the pointers and containers which were publicly available. This was a constant source of bugs and completely unsuitable for nested symbols that we wanted to import.
My wive wanted to give me the first kit for a RepRap Mendel for Christmas. She was really sorry that the kit didn’t make it under the tree, as it was sold out. I was excited about the Project for more than a Year, but it was too expensive to just give it a go. Some of these projects that seem very interesting fade away with the time, or cheaper alternatives apear as it happened with the quadro copter, but the RepRap didn’t go out of my mind. So, Mirella gave me the first kit, and from here, I will build it step by step. Continue reading “RepRap Mendel Part1”
Voip used to be a big hype, but nowdays you don’t hear a lot about it. I thought that was because it gained wide adoption. But maybe not. At least in the company I work, we went back to a regular telephony system after having constant trouble with the voip installation.
From time to time, I hear or read about Asterisk and Freeswitch. That made me curious for some time now. Also I wanted an alternative to Skype for a variety of reasons: It’s protocol is proprietary. It’s not available on all platforms (e.g. openmoko). On Android, it drains the battery and friends tell me they get constant log-in and out notifications. And finally, the computer has to be on to receiceive calls. Continue reading “Why I gave up on voip (for now)”
I heard of mesh networks before, be it from the OneLaptopPerChild or the German Freifunker community. But the recent episode of ChaosRadio about the MeshPotato got me interested enough to give it a try. The meshing community here in Switzerland is organized at openwireless.ch. Sure, I could buy a compatible router and install the provided firmware. But being a true geek I wanted to see how it works on hardware that I already have. So I started with these three devices:
- Alix 2d13 running ubuntu server lucid
- Openmoko Freerunner running qtmoko (based on debian lenny)
- Acer Aspire one running ubuntu maverick
I wanted to allow access to the internet, but only through an anonymizing service, so I wouldn’t get into trouble if somebody does something illegal over my wire. Continue reading “openwireless.ch in Brunnen”
At the company I work (BORM), we have an internal web page with the company news. We’re required to log in and check every once in a while.
Now to get notified automatically, wehen some news are to be discovered, I hacked together a PHP script that logs in, downloads and parses the news. It then serves an rss xml file to my feed reader.
In the past I didn’t do a lot of PHP scripting. Only editing some bits and pieces. So this is my biggest endeavor to PHP.
I won’t tell you where the script can be accessed, as the company news requires login. But the script itself is here: