Megahedron—A 3D Graphics Environment
Overall I found the feature set of Megahedron to be quite extensive. The documentation blows away anything else I've seen for a tool of this nature. I'm constantly looking for tools which can easily be picked up by a novice user. Megahedron certainly falls into this category simply on the strength of the documentation and sample programs. It is, however, not perfect. See Sidebars 1 and 2 for lists of Megahedron' pros and cons.
At one point the “Introduction to 3D Coordinates” says it is not necessary to know algebra or trigonometry to use Megahedron. Possibly true, but without either what you can do with Megahedron will be severely limited. Face it, knowing how to place objects in 3D requires not just an understanding of geometry, but trigonometry as well.
One area I didn't cover in this review is the rendering engine. I didn' do many full renders due to time constraints on my system. (I had other renderings running and needed to keep a little system time for other work.) If you get a chance to try Megahedron and can compare it with BMRT and/or POV-Ray (or any other renderers that run on Linux) feel free to write it up and pass it on to me. Chances are good I'll include it in a future “Graphics Muse” column in Linux Gazette.
Despite the problems mentioned, I think Megahedron would be a good way for new users to get started with 3D images. Experienced users might find the animation capabilities quite useful as well, although the animations might not be as impressive with the builtin renderer. It's difficult to say without more detailed images that make full use of the shading language. The documentation is quite extensive and well written and the licensing is user friendly. I would recommend this package to anyone interested in learning more about 3D graphics.
Michael J. Hammel is an X Windows and applications software engineer for EMASS in Denver, CO. He is the author of the “Graphics Muse” column in the Linux Gazette, keeper of the Linux Graphics Mini-HOWTO and co-author of The Unix Web Server Book from Ventana. His interests outside of computers include 5K/10K races, Thai food and gardening. He suggests if you have any serious interest in finding out more about him, you visit his home pages at http://www.csn.net/~mjhammel. He can be reached via e-mail at email@example.com.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide