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 CAD / Development / 1845
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Subject: 
Re: Where should I center this one?
Newsgroups: 
lugnet.cad.dev
Date: 
Mon, 24 May 1999 13:55:54 GMT
Viewed: 
680 times
  
On Fri, 21 May 1999 20:46:54 GMT, "John VanZwieten"
<john_vanzwieten@email.msn.com> wrote:

I'm trying to decide where to set the origin for the SW hinge pieces.  Normaly
I would center a hinge piece on its rotation axis, to make it easy to rotate
the hinge.  However, the rotation axis for these hinges is 9 LDU below the top
of the brick, meaning that a user would have to go to fine movement in LEdit to
place the brick on a normal model.  I think we'd find many of these bricks
placed 1 LDU into the brick or plate below it.

But if i use the top of the brick for y=0, then rotating on the hinges becomes
even a bigger pain.

What do others think?

The center should be on the rotation point.

Like you said, rotating the pieces when the rotation point is not centered
on the hinge is a bigger pain than getting the pieces into the right
position.

(It would be great if some future version of LDraw would have a center of
rotation separate from the the physical centerpoint).

Also, what the heck should we call these things?  Obviously they should be in
the hinge category, but what then?  I've heard them called "toothed",
"serated," "click-brick," and probably several others.  And how should we
distinguish the male from the female in this case?  Since this type of hinge
occurs on the windscreen, the name should be "attachable" to other parts.

I'd rather name them after the function than the shape.  So "stepper",
"discrete" or "lock-step".

2 Finger and 1 Finger?

Steve



Message has 2 Replies:
  Re: Where should I center this one?
 
(...) The center should be centered on the top of the brick, between the studs, as it is with every other hinge piece in LDraw. Moving the center of rotation to the hinge is a trivial amount of work, as it is with every other hinge piece in LDraw. (...) (26 years ago, 24-May-99, to lugnet.cad.dev)
  Re: Where should I center this one?
 
(...) Agreed. Rotation is the bigger pain. (...) In LEdit, I occasionally add an imaginary new piece, "rotate.dat", after the piece I want to rotate. Move it to the point where I want it, then set the rotation on that point. Move back up a line to (...) (26 years ago, 25-May-99, to lugnet.cad.dev)

Message is in Reply To:
  Where should I center this one?
 
I'm trying to decide where to set the origin for the SW hinge pieces. Normaly I would center a hinge piece on its rotation axis, to make it easy to rotate the hinge. However, the rotation axis for these hinges is 9 LDU below the top of the brick, (...) (26 years ago, 21-May-99, to lugnet.cad.dev)

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