The BRL-CAD Logo depicts two interlocked nodes. Modeling the new Logo in BRL-CAD in CSG (without NURBS, without polygons) requires some careful arrangement, but can provide an attractive three dimensional rendering that we can use for a number of purposes.
NOTE: The two segments you model MUST be two or more regions hinged together. You can have center pins or not, you decide, but they MUST join together in some fashion. Look at a hinge on a door near you. Also, note that most images of our new logo show the black and red portions not connected but your version of the model MUST connect them together.
The output of this task will be a .g file of BRL-CAD logo and a rendered image. This command run within MGED should help give you an interesting render:
References:
- http://brlcad.org/images/angelov_256.png
- http://brlcad.org/d/node/92
- Introduction to MGED at http://brlcad.org/wiki/Documentation
| File name/URL | File size | Date submitted | |
|---|---|---|---|
| Render Image with .g file.zip | 135.4 KB | December 10 2012 18:09 UTC | |
| NEW.zip | 240.7 KB | December 11 2012 09:20 UTC | |
| brl.g | 16.1 KB | December 12 2012 18:32 UTC | |
| TOP.PNG | 89.2 KB | December 12 2012 18:33 UTC | |
| SIDE.PNG | 91.9 KB | December 12 2012 18:33 UTC |
I would like to work on this task.
This task has been assigned to Sharan. You have 72 hours to complete this task, good luck!
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I was new to this software.
The Documentation files helped me alot.
My previous experience in MAYA made it a lot easier.
Sharan, that's looking good, but the two regions do not hinge together. Note in the description that they need to "connect" together. Think of a bike chain or a door hinge even. The black one needs to go "into the red one.
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Check the NEW.zip file.
Sharan, I apparently didn't even notice in your first example that they're not symmetric. It becomes *very* apparent when you joined them together. The two left/right holes should be the same distance from the "center" hole. Also, your model has a modeling error in part3.r where you have a region unioned into a region. Either part3.r shouldn't be a region (and should be renamed) or part1.r shouldn't be a region (and should be renamed) or a different combination should be created that contains the same geometry as part1.r and then again for part2.r. Make sense?
Also note that the "connection" between" the nodes isn't supposed to be just a straight ARB8 box like that -- it should be curved -- but that's not critical like the other problems.
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Your subtractions are slightly off, but that's undoubtedly because you tried to line up the wireframe instead of the actual edges and it's good effort regardless. It'd tricky to get them perfectly tangent (there are more advanced methods to help with that).
Still, nicely done and good work cleaning up the errors!
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