Ubuntu 8.10 Intrepid 64-bit Problems

12 11 2008

After using Ubuntu some more I’ve run into a few new problems with no solution. If anyone has any advice, leave a comment. If I happen to find a solution I’ll edit the post and add it to the end.

First off I’m using a Canon iP1800 printer, and there appears to be no 64-bit drivers for it. I found some 32-bit drivers for it and attempted to install them using getlibs, but nothing seemed to happen. If I try and just run the deb files I end up with an “incorrect architecture error”. No solution found yet, Googling just reveals lots of people with the same problem and the only solution seeming to be switching to 32-bit Ubuntu or using a generic Inkjet printer driver which doesn’t perform well at all on this printer.

Second, there is no 64-bit Sun Java plugin for Firefox. If you try and install it on 64-bit with apt-get you get the following error,

Package sun-java6-plugin is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package sun-java6-plugin has no installation candidate

I would just stick with IcedTea but Java3D doesn’t seem to like OpenJava. I installed the IcedTea plugin for getting Java to work with Firefox and installed the Java3D libraries following the instructions on this link, http://www.icram.de/?q=node/85, but all I get is a grey box when trying to load any sort of Java3D application. Eclipse still works with Java3D applications using Sun Java’s JVM though.

Neither of these problems are deal breakers, but they’re certainly annoying, and further evidence that Linux (especially 64-bit) isn’t quite ready for the desktop world. Linux works great, works with hours of Googling and editing of configuration files, or doesn’t work at all (unless you feel like writing your own drivers). Unfortunately, I’ve always had hardware that fits into the last category (weird wireless cards, video cards, printers). The blame is quite likely on the hardware companies and not the operating system itself, but the average desktop user doesn’t care who should be blamed for the problems, they just want them fixed. And for that matter, so do I… switching to Windows every time I want to print something is a real hassle, and buying new hardware to make your operating system work is more of a Mac thing.





Rubik’s Cube Programming: Part 3

5 11 2008

I’m still messing with the Rubik’s Cube and Java3D every now and then, so here’s an update. Instead of making the cubies actually rotate, I just decided to make them change color. And instead of bothering to keep track of all the cubies and change the colors, I instead just decided to display the cube as a BranchGraph, and then remove the BranchGraph and generate a new one when you twist a side. Result, the colors of the cubies change. Not the best way to do it probably, but it works well enough. In order to rotate a side I’d need to have cubies in more than one transform group, delays to not rotate one side until another side is done rotating, and regenerating the transform groups every twist anyway because the same cubies would no longer be on the same faces. I’ll save that for version 2…

Rubik's Cube Program Version 0.1

Rubik's Cube Program Version 0.1

At the top you have controls to reset the cube to a solved state, scramble the cube,  and display either a black Rubik’s Cube or a see through Rubik’s Cube. In the center, we have the Rubik’s Cube itself, can be rotated, moved, and zoomed using the mouse. The right is a list of text values describing the arrays, and on the bottom is an entry box which will allow values f, f’, b, b’, l, l’, r, r’, t, t’, d, d’, rotating the sides either clockwise or counterclockwise. You can either enter one value at a time or a handful of values seperated by spaces. Everything works fine and I declare it version 0.1!

Rubik's Cube Program Version 0.1You can go play with it if you download Java 3D API here,

http://java.sun.com/products/java-media/3D/download.html

And you can find the Rubik’s Cube in it’s current version here,

http://wolfhacker.jumbofx.com/cube/cube.html

Note: it will NOT work at this moment without downloading and installing the Java 3D API first. It’s a small and fast install though.

To do list:

  1. Display the sides not visable by means of some sort of mirror.
  2. Program the methods to actually solve the cube and display how.
  3. Create user entry mode so people can program in their own cube permutation to be solved.
  4. Run without the need for users to download Java 3D manually.

I’ll get right on that… after writing up an EE120 lab report, doing MAT267 homework, and finishing up homework that’s actually for my Java class… and maybe watching some TV. Stay tuned for most likely the last Rubik’s Cube programming post, part 4!





Rubik’s Cube Programming: Part 2

28 10 2008

In the beginning, there was nothing. Then the programmer said, “let there be light!”

Let there be light!

Let there be light!

And then… there was still nothing, but now you could at least see it if there was something. So begins the adventure in Java 3D. I decided to make a bunch of little square cubies instead of actual cubed cubies, just cause it kinda looks cool. Maybe I’ll try it with cubes later, but whatever. I think all I have to do is make all the cubies, add them to transform groups, and then add those into transform groups which will rotate the sides, and then add those into the branchgroup, and then add that into the universe, and everything will work out. Well I’m really not sure, Java3D tutorials are so very boring, but I’ll try it and find out. I don’t have anything else to post tonight, so here’s a pic of the cube being built. As usual school and work are taking up almost all of my time, leaving most of the Rubik’s cube program and specs in a purely theortical state of exisetence. It’ll all work fine, in theory, I think. Although, as soon as you open the box, the state may collapse along with the entire theory. ::incoherent rambling of 1:00am::

Cube Building

Cube Building