Subject:
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Re: My attempts to get a vector line drawing
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Newsgroups:
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lugnet.cad
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Date:
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Sun, 29 May 2011 18:38:51 GMT
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Viewed:
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22469 times
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In lugnet.cad, Eric Albrecht wrote:
> In lugnet.cad, Roland Melkert wrote:
> > In lugnet.cad, Eric Albrecht wrote:
> > >
> > > You are right that I can approximate it simply by making all the parts
> > > white (as shown). However, shaded white is not really white. Every angle
> > > of white reflecting to the camera is actually a different shade of gray. I
> > > really want no shading at all.
> >
> > Have you tried disabling lighting?
>
> Wow do I feel stupid. No, I hadn't tried that, and it works perfectly. It's
> still not a vector image, but at least it gets me to a good raster image in
> one step instead of five. It is a bit counter-intuitive to me that the way
> to get a good wireframe is NOT to enable wireframe mode but rather to make
> the parts white and shut off lighting, but at least it works! (Note that the
> LEGO logo will show up on the studs in light gray unless you disable
> primitive substitution.)
> <<http://www.brickshelf.com/gallery/blakbird/Renders/small/vector/9.jpg>>
I've been experimenting with generating these type of images for quite a while
and so far come up a number of techniques. These are as follows:
1) Convert MLCAD model to DXF file using Rolf Redford's LdrDat2Dxf. Then use
PoseRay to create a mesh2 model. I then use a POV-Ray utility called PovEdge to
create a set of files that POV-Ray then uses to outline the edges of a model.
The results of this technique can be seen here:
http://www.pearse.co.uk/lego/images/policeman_large.jpg
and here:
http://www.pearse.co.uk/lego/images/r2-d2_large.jpg
2) Use MLCAD to colour all objects white, then load into LDView. I then use the
following settings to make all the object edges black:
http://www.pearse.co.uk/lego/links/ldview_settings/
I then use "Save Snapshot" to create a PNG. I then load this into Inkscape and
use the "Trace Bitmap" option to create an SVG file. You can find examples of
this technique here:
http://www.pearse.co.uk/lego/images/pirate_large.jpg
http://www.pearse.co.uk/lego/images/jet_large.jpg
I hope this helps.
Reuben
=====================================
Download 3D Lego models and other resources from:
http://www.pearse.co.uk/lego
=====================================
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Message has 1 Reply:
Message is in Reply To:
 | | Re: My attempts to get a vector line drawing
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| (...) Wow do I feel stupid. No, I hadn't tried that, and it works perfectly. It's still not a vector image, but at least it gets me to a good raster image in one step instead of five. It is a bit counter-intuitive to me that the way to get a good (...) (14 years ago, 24-May-11, to lugnet.cad, FTX)
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