Subject:
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Re: "Left" view
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Newsgroups:
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lugnet.cad.mlcad
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Date:
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Wed, 7 Dec 2005 15:42:25 GMT
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Viewed:
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13790 times
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In lugnet.cad.mlcad, Joey Jenkins wrote:
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In lugnet.cad.mlcad, Dean Earley wrote:
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Erm...
Is it me or is the “left” view in MLCad wrong?
It is looking left but at the right side of the model.
Thanks
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Hello, all. I’m a new poster to this newsgroup, usually just a lurker. This
discussion caught my eye and I wanted chime in. Perhaps the reason the LEFT
view appears wrong is due to the orthographic projection scheme used by
MLCad--First-Angle vs. Third-Angle. The two schemes are quite different in
how they present an object. I believe that first-angle is the standard in
Europe and third-angle is more prevalent in the States.
A good explanation of the differences can be found here:
http://www.guajara.com/wiki/en/wikipedia/o/or/orthographic_projection.html.
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Hmm, maybe. But in both first- and third-angle projections, the central
view/projection shows the same side of the object.
In the case of MLCAD, when you choose ‘front view’, you are shown the front of
the model. Same for top, bottom, and back views. When you choose ‘left view’,
you are shown the right side of the model. Likewise, choosing ‘right view’
results in being shown the left side of the model.
Steve
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Message has 1 Reply:
 | | Re: "Left" view
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| (...) Actually, front and back are the same in both projections. One might argue that since MLCad does the top and bottom views that we're expecting, that this invalidates the argument. However, remember that the LDraw coordinate system is flipped, (...) (19 years ago, 7-Dec-05, to lugnet.cad.mlcad, FTX)
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Message is in Reply To:
| | Re: "Left" view
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| (...) Hello, all. I'm a new poster to this newsgroup, usually just a lurker. This discussion caught my eye and I wanted chime in. Perhaps the reason the LEFT view appears wrong is due to the orthographic projection scheme used by MLCad--First-Angle (...) (19 years ago, 7-Dec-05, to lugnet.cad.mlcad, FTX)
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