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 CAD / LDraw Files / Parts / Primitives / 18
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Subject: 
Re: Part number needed & New primitive submission
Newsgroups: 
lugnet.cad.dat.parts, lugnet.cad.dat.parts.primitives, lugnet.cad.dev
Date: 
Thu, 29 Jul 1999 13:06:43 GMT
Viewed: 
6 times
  
On Wed, 28 Jul 1999 17:20:11 GMT, "Adam Howard" <abhoward10@hotmail.com>
wrote:

The new primitive seems ok, too. Very unusual that it starts from the • center and
goes from -0.5 to 0.5 in all directions. I don't know if I like it, but I • can
surely live with it.

I think the box should conform to the same geometry as the other box*
primitives -- it should range from -1 to +1, not -.5 to +.5.

The way this primitive is designed saves time for the part author (not a
whole lot, but some).  Once you have the dimensions you want you just plug
those in directly without having to divide them by two.  When you use a
primitive that goes from -1 to +1 you actually have a 2LD unit primitive,
but when you use a primitive that goes from -.5 to .5 you have a 1LD unit
primitive.  Another way to do it would be to start at 0 and go to 1, but I
like putting 0 at the center of the primitive better.

I realize that primitives which are sized to 1LDU are easier to use, but a
set of primitives which don't all use the same sizing are *harder* to use
overall, because the author has to remember which sizing to use for which
primitives.

Steve



Message has 1 Reply:
  Re: Part number needed & New primitive submission
 
(...) You're right about that, but if you look at the primitives not all are based on a 2x2x2 cube, some are based on a 2x1x2 cube, or a 1x1x2 cube(maybe). Not to mention some have top and side faces, missing lines on two sides, ect. To use them (...) (25 years ago, 30-Jul-99, to lugnet.cad.dat.parts, lugnet.cad.dat.parts.primitives, lugnet.cad.dev)

Message is in Reply To:
  Re: Part number needed & New primitive submission
 
(...) center and (...) can (...) The way this primitive is designed saves time for the part author (not a whole lot, but some). Once you have the dimensions you want you just plug those in directly without having to divide them by two. When you use (...) (25 years ago, 28-Jul-99, to lugnet.cad.dat.parts, lugnet.cad.dat.parts.primitives, lugnet.cad.dev)

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