I updated my solar system renders. They now use perspective projection, and are uploaded to Wikipedia in WebP format instead of GIF. MediaWiki and some Web browsers aren’t fully compatible with the WebP format yet, however.
I have spent the last few weeks moving most of my geometry activities from this site to the online collection at the GeoGebra website. I plan to do the same for my LDraw models, either at Brickshelf, MOCpages or Rebrickable. I’ve also written a new tutorial for the POV-Ray wiki, and created a new solar system scene for the POV-Ray Object Collection and Wikipedia.
I have been busy creating illustrations for Wikipedia. They can be seen on my user page at Wikimedia Commons. Most of them involve the spherical or elliptical coordinate systems somehow.
I also created a series of sectional drawings comparing the internal geometries of the various “Color Spheres” of (from left to right) Johannes Itten, Albert H. Munsell, and Philipp Otto Runge; as well as a fourth sphere created for comparison based on the spherical coordinate system. It is amazing how many ways there are to draw a sphere!
And I updated a couple of existing images that show how the color-making attribute saturation can be determined from the chroma and value parameters of the Munsell Color System. (Though this definition of saturation is a bit different than the one used in the HSL color space I am accustomed to.)
Lastly, I finished an old scene featuring my interpretation of Larry Niven’s Ringworld. It is a giant ring encircling a far away sun, with oceans, continents and Earth-like weather embedded into it. Here’s the latest render:
The source code for these images can be found in my new GitHub repository which I just created for this purpose.
I created four new illustrations showing how several forms of graphical projection are produced. You can view them all here. I started out by modeling them in POV-Ray. The next step was to export the important coordinates to a text file using a modified version of “screen.inc”. I then imported these coordinates into GeoGebra, and connected them all using line segments to produce the final images. I discuss this process here.
With lots of help from Christoph Lipka at the POV-Ray newsgroup, I created four more images for Wikipedia having to do with color spaces. They show the sRGB color gamut projected within the bounds of the CIELAB and CIELUV color spaces. Both the rectangular and cylindrical models are depicted. You can see all the renders, as well as some animations, on my Wikimedia Commons page.
In other news, I fixed my GeoGebra applets so they work again in browsers that no longer support Java, such as Google Chrome. View them here.
I’ve put a lot of work lately in my Colony Ship POV-Ray model. The latest version can be viewed at DeviantArt, here.
I’ve also updated several of my illustrations for Wikipedia. The switch from POV-Ray version 3.6 to version 3.7 required changes to how pigments are defined among other things.
Lastly, I updated ToEE d20 Inspector to fix some bugs related to how skill points are calculated and distributed. They should no longer be wildly inaccurate. You can find the program listed here.