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..
The output of this task will be a .g file of BRL-CAD logo and a rendered image. The two segments you model MUST be two or more regions hinged together (you can have center pins or not, you decide). This is your opportunity as an artist and 3D magician to come up with an interesting yet faithful interpretation.
References:
- http://brlcad.org/images/angelov_256.png
- http://brlcad.org/d/node/92
- Introduction to MGED at http://brlcad.org/wiki/Documentation
Note that there are other logo modeling tasks and yours must start from scratch and be completely original. If we get a hint that yours was based off of or used measurements from some other model, you will be barred.
This command run within MGED should help give you an interesting render:
rt -A0.75 -s1024 -c {set ambSamples=256}| File name/URL | File size | Date submitted | |
|---|---|---|---|
| logo.g | 14.9 KB | December 18 2013 09:31 UTC | |
| logo.PNG | 133.3 KB | December 18 2013 09:31 UTC | |
| logo_revised.g | 16.6 KB | December 19 2013 06:35 UTC | |
| logo_revised.PNG | 163.0 KB | December 19 2013 06:36 UTC | |
| logo_revised2.g | 21.5 KB | December 19 2013 08:10 UTC | |
| logo_final.zip | 246.4 KB | December 19 2013 08:28 UTC | |
| logo.zip | 165.7 KB | December 20 2013 05:37 UTC |
Please add more tasks, I aldready commented this on my previous task but I think nobody didnt notice it..
Ideas for New Tasks
I remembered in 2012, there were tasks to model hourglass,caffine molecule,gemstone etc
There were also some diagrams of primitives left to make.. :-)
I would like to work on this task.
This task has been assigned to Chan Ho Jun. You have 72 hours to complete this task, good luck!
The work on this task is ready to be reviewed.
Where are they hinged?
"The two segments you model MUST be two or more regions hinged together (you can have center pins or not, you decide)."
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
The work on this task is ready to be reviewed.
As hinged, do you mean that they need to be connected?
Yes, they need to be connected, not just overlapping. In fact, there must be NO overlap errors reported.
If you do a Google image search for "hinge", you'll find lots of great examples. Basically, your model should be physically realistic, like two links in a bicycle chain or a door hinge or something similar.
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
I've finished my modeling part. But I don't know what I did, I can't see my model in the render output. It clearly exists in the viewport. Please help
The work on this task is ready to be reviewed.
Nevermind the comment above. I was able fix the problem. Check out the latest upload for the final renderings
You intersect solids which have no overlap. "No overlap" is OK, but you want the union "u" of them.
Furthermore, leftRing and rightRing should be regions. And there should be a group for the whole model, e.g. and all.g containing leftRing and rightRing.
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
Formal issues:
- The left- and rightRing aren't regions. They are colored combinations what's not the same.
- There should be a group containing the whole model.
Stylistic issue:
The black pin looks misplaced if you compare it to http://brlcad.org/images/angelov_256.png.
A simple solution for this would be to put the pin in an own region and make it white. However, it would be more reasonable to create a second rightMiddleExtrude around the second hole of rightRing and to model the leftExtrude around it.
The work on this task is ready to be reviewed.
Yes, the new design not only satisfies the concept of a physical hinge, but also looks more like the 2D version of the BRL-CAD logo not having a seperate pin. And it looks better too :) I also noticed if I enlarged the other hole of the black ring, the whole logo can be repeatable. The black ring could connect to another pink ring and that one connecting to another black ring and so on.
Congratulations, this task has been completed successfully.
Chan, these are excellent improvements, especially given where you started (revisit some of your first submissions!). The final design looks great and looks like something we can use with minimal changes, if any.
Please do join our brlcad-news mailing list if you have not done so already. Whenever we put a logo model to use, we make announcements to that mailing list and will mention you by name. It's a great way to keep in touch with our activities after GSoC is over: https://lists.sourceforge.net/lists/listinfo/brlcad-news