Subject:
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Re: What about a LEGO TECHNIC tutorial
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Newsgroups:
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lugnet.cad
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Followup-To:
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lugnet.cad.mlcad
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Date:
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Mon, 6 Jun 2005 17:13:45 GMT
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Viewed:
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1412 times
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In lugnet.cad, Eduardo Vazquez Harte wrote:
> I whould love to do my LEGO TECHNIC sets also in ldraw but I found it
> hard and bit complex to do.
> So what if someone does a tutorial for me or anyone that want's to have their
> TECHNIC sets in Ldraw format?
>
> I don't mind if the tutorial is showing how to do set with MLCad or ldglite.
>
> Thanks
Hi Eduardo,
All the models I enter are technic. Compared to brick building, technic is
much harder. With the standard bricks, everthing is turned multiples of 90
degrees, and studs line up parallel to the x,y, or z axis.
Jaco is right, it would take a lot to write up a tutorial for technic.
For me, the biggest issues is rotations. Technic allows for many more
orientation angles than the standard brick. Rotating about X,Y, and Z axiz are
pretty good, but I usually have to adjust the "fine" grid settings rotation to
something like 1 degree. Also I typically set the fine moement settings much
smaller than the default.
It sure would be nice to have a few more setting levels.
One problem with technic designes is that axis of rotation are often not
parallel to the X,Y or Z planes. I use GROUPS to collect all parts related to a
rotation axis, so they are easy to work with. Then I rotate them so the
rotation axis is parallel to one of the X,Y, or Z axis'. From there, I rotate
the group the amount needed. I then have to reverse the original rotations to
get the group oriented back to the original rotation axis.
It sure would be nice to be able to pick an axle or pin, and use that to
define a rotation axis. From there you could rotate the group clockwise or
counter clockwise.
I spend a lot of time managing the rotation point.... being able to move it
small increments by the keyboard might help, but I've never studied MLCad enough
to know if it already exists.
The width and height ratio stuff that LEGO is famous for is also a problem in
technic. Getting pins and axles precisely in the holes is a tough task,
especially if the axis of the pin is not parallel to X, Y, Z.
Also the fact that pins are defined to be symmetric around the Y axis, and
axles are symmetric around the X axis is a pain as well.
What kinds of problems are you experiencing?
Kevin
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Message has 3 Replies:
 | | Re: What about a LEGO TECHNIC tutorial
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| (...) Select the part you want it to pivot around then select the rest. It will always pivot around the pivot point of the first item selected. (...) You can make it visible and draggable with the mouse. (...) Down 2 LDU :) (19 years ago, 6-Jun-05, to lugnet.cad.mlcad)
| | | Re: What about a LEGO TECHNIC tutorial
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| (...) It oughtn't be too hard to do that. You just use the pin to define your normal vector and then just work backwards from the projection to work out the rotation matrix. I noticed today that MLCad already seems to have a routine to calculate (...) (19 years ago, 7-Jun-05, to lugnet.cad.mlcad, FTX)
| | | Re: What about a LEGO TECHNIC tutorial
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| (...) Mine settings are movement Large Move(XYZ)=10 Rotate(XYZ)=22.5 Medium Move(XYZ)=1 Rotate(XYZ)=15 Fine Move(XYZ)=0.001 Rotate(XYZ)=0.5 I spend most of my time in Medium and do ultrafine adjustments in Fine. I do occasionally (namely when (...) (19 years ago, 7-Jun-05, to lugnet.cad.mlcad)
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Message is in Reply To:
| | What about a LEGO TECHNIC tutorial
|
| I whould love to do my LEGO TECHNIC sets also in ldraw but I found it hard and bit complex to do. So what if someone does a tutorial for me or anyone that want's to have their TECHNIC sets in Ldraw format? I don't mind if the tutorial is showing how (...) (19 years ago, 6-Jun-05, to lugnet.cad)
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