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Origin of part 3651 |
Posted by: N. W. Perry - 2021-09-17, 14:06 - Forum: Parts Authoring
- Replies (4)
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I've come to the realization that the origin of part 3651 (the venerable "toggle joint" or pin/bush connector), and a few others like it, is quite simply in the wrong place. It should really be located at the center of the pin section, not the bush end, since this is always where it needs to be rotated when working on a model. Also, whenever a piston head is placed on it, it is at this point, and likewise with any other parts placed on its studs. Finally, whenever I need to measure the length of an assembly that includes this part, I always need to know the distance to the pin hole, not to the bush end. (Yes, I can just add 20, but it's one more step to make an error…and if I'm scaling a diagonal cross brace or something, do I scale the 20 as well or just add it afterwards…?)
I know that this is a very old part, and that changing the origin of an official part is essentially a non-starter since it would mess up a whole lot of pieces in a whole lot of models. And I can always just make a fixed version for my own use. But I am curious whether this has ever been brought up before? Certainly, all the newer connectors seem to put the origin in the right place. (Has it ever been considered to have a second version of a part to correct something like this without having to replace the existing one?)
Anyway, that's it for my mini-rant. Hope you enjoyed reading!
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LDraw terminology for part anatomy |
Posted by: tom alphin - 2021-09-12, 22:26 - Forum: General LDraw.org Discussion
- Replies (6)
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Hi,
Some of you may know me from my book The LEGO Architect or my brickarchtiect.com website. I'm always looking for ways to simplify the more confusing aspects of our hobby, including my work on the LEGO Brick Labels project.
In order to create the labels, I've needed to craft extremely short descriptions for each part which complement the part image. (Because the name is always accompanied by the image, I can take some liberties to make the names shorter.)
One of the biggest challenges I've encountered is a semantic one. Different websites (including LEGO.com) use different names for each part, and even for the 'anatomical' elements within a part. I am in the process of learnign all the names used within the hobby for these connections and anatomy - in the hopes that I can distill the most commonly used terms.
![[Image: 2020-10-03%20-%20LEGO%20Storage%20Guide%...irtual.jpg]](https://brickarchitect.com/files/2020-10-03%20-%20LEGO%20Storage%20Guide%20(for%20AFOLs)%20-%20BrickCon%20Virtual.jpg)
Slide showing most of the common connection types in contemporary LEGO parts.
There are several aspects of LEGO part anatomy that I'm curious to hear how they are named within the internals of the LDraw project.
For example:
- On the underside of a 1x2 brick, there is a rod between the studs to create a gap the right size for a stud to attach. Is this called a "bar" since it is 2 units wide (in the measurement system used above), or do you have a different term?
- Hollow Stud - Is there a better term for these hollow studs which accept a bar element?
- Bar/Clip/Handle - A "handle" has the same diameter as a bar element. Is there another term for these used within LDraw project?
- Mini Bar - I have also seen "prong" as a term for this, such as in the context of relatively new part 68211
- Click Hinge - I have also heard "indexed hinge" and other terms - is there a common name here?
- Ball - This is also sometimes described as a constraction hinge - has that term been outmoded by now?
- Mini Pin - Is that the closest thing we have to a universal name for this non-Technic pin connection?
If there is already a LDraw Part Naming Styleguide, please let me know. If not, maybe this project can help create one?
Sincerely,
---tom
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Rubber band templates question |
Posted by: N. W. Perry - 2021-09-10, 15:40 - Forum: LDraw Editors and Viewers
- Replies (4)
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For band/belt templates in LDCad, the radius of a point is measured to the center of the path. I thought it would be handy to offset the path skin so that its inner edge follow the radius (i.e., the radius of the point is the same as the part it goes around).
I thought adjusting the alignment parameter was the way to do this, but it didn't work. It just breaks the path into segments with wide gaps (and they aren't noticeably offset from center).
Is there a simple way to adjust the template to do this? Or would I have to create a donor part with the origin shifted (and would that even work)?
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