Subject:
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Callout generation
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Newsgroups:
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lugnet.cad.dev
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Date:
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Sun, 13 Apr 2003 05:27:49 GMT
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Viewed:
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619 times
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I decided to take a break from the extensibility issue and decided to tackle
something I've wanted to tackle for a while: callout images for small
sub-assemblies.
These callout assemblies can be seen in LEGO building instructions here:
http://library.brickshelf.com/scans/8000/8868/8868-16.html
I've prototyped up a meta-command to create similar images:
http://www.brickshelf.com/gallery/kclague/LPub/foot_co_row.jpg
The above image is columnar, and the one below is row oriented.
http://www.brickshelf.com/gallery/kclague/LPub/foot_co.jpg
The meta-command:
LPUB CALLOUT BEGIN <row_margin> <row_seperator_width> <col_margin>
<col_seperator_width> (ROW_LIMIT | COL_LIMIT) <limit>
combined with
LPUB CALLOUT END
surrounding a sub-model part usage, gets you a tiled image like shown above.
The meaning of the parameters are as follows:
<row_margin> - buffers a step image from the left and right edge of the
callout image and vertical seperators.
<row_seperator_width> - lets you define how thick a horizontal line you
might draw between rows of steps. A value of zero means no line.
<col_margin> - buffers a step image from the top and bottom edge of the
callout image and as well as the horizontal seperators.
<col_seperator_width> - lets you define how thick a vertical line you might
draw between columns of steps. A value of zero means no line.
ROW_LIMIT <limit> - means you want to limit the vertical size of the image
to <limit> pixels, and the image grows horizontally as much as needed (this
is the kind of tiling that is used in the scanned image of a page from a
LEGO instruction book above.)
COL_LIMIT <limit> - means you want to limit the horizontal size of the image
to <limit> pixels.
Also LPub's part list image generation recognizes CALLOUT, and adds all the
parts added in the callout image to the current step's part list image
(rather than showing you a complete image of the sub-model). This addresses
Jennifer Clark's request of:
http://library.brickshelf.com/scans/8000/8460/8460-015.html
Currently it doesn't support multi-level callout (the pink box shown in the
above scan), but I'll work on it. I have to add sub-model level controls
before it will be meaningful.
I'm thinking about putting the controls for callout image generation outside
of the DAT files, because simply changing callout format in a given DAT file
makes LPub run POV-Ray for all the steps in the file. CALLOUT is merely
tiling together already computed images, so there should be no need to run
POV-Ray.
Kevin
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Message has 1 Reply:
 | | Re: Callout generation
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| (...) This looks cool! (...) How about LPub reading from a 'callout.ldr' submodel in the MPD file, and adding an option to say "compile callouts from previously generated images?" -Tim (21 years ago, 13-Apr-03, to lugnet.cad.dev)
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