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Subject: 
Re: Proposed solution for Building Instruction scale issue
Newsgroups: 
lugnet.cad, lugnet.inst
Date: 
Sat, 18 Jan 2003 12:42:28 GMT
Viewed: 
1134 times
  
Hi Mike,
  I've wanted the sub-model selection stuff you talked about for a while
also (whether you use MPD or not.)  I think it would be very handy.  I think
that the form of this solution is in a GUI addition to LPub itself, where
you get a list of the sub-models and a check box for each indicating that
you want them generated (this would eliminate the "include sub-models"
checkbox).

  One of the things I like about LPub is that it is a fire and forget tool,
meaning that once you tell it to start genreating building instruction
images, no user intervention is required.  Trying to map this forward, it
seems like sub-model level control of LPub settings would be handy (along
with sub-model generation enabling/disabling).  My inclination is to have
this take the form of a new pseudo-command in the LDraw file that describes
the resolution you want the model images generated at, possibly the scale as
well.

  I've also wanted the sub-model as a callout picture feature.  Where you
can have small sub-models generated as you showed in your first example.  I
also want to be able to make multi-step callouts with the steps/and part
list images tiled nicely into one picture.  You would want them outlined,
and be able to choose a background color.  This is not available in MLCAD.
I also think the best solution for this is to control it using pseudo-commands.

  I've got generated-file placement controls on the todo list:  DATs, POVs,
images, web-pages, could each probably use their own controls for placement
in sub-directories (all could be the same or different if you like).  This
would be controlled through LPub's GUI.

  I'm a computer engineer working for Sun Microsystems on the largest ASIC
they've ever made ;-).

Kevin


In lugnet.cad, Mike Walsh writes:

"Kevin Clague" <kevin_clague@yahoo.com> wrote in message
news:H8vv2I.6M3@lugnet.com...
<snipped>

I have a couple of ideas that I think would improve the LPub usage • paradigm.
How would you like them presented to you (if at all)?  Would you prefer • them
posted or e-mailed?

Mike,
  I think posted is good.

Thanks,
Kevin

I have added lugnet.inst to this post as there seems to be a lot of LPub
related traffic in that group and the topic of my post is very much related
to instructions.

It has been a long time since I put together a model that didn't use
sub-models.  I think of a design hierarchically.  Most of my designs are
train related so I will context my thoughts in those terms.

For a simple passenger wagon like the middle car on the Metroliner, I would
probably end up with about 10 sub-models within a MPD.  Simple things like
train windows and doors are actually a two step process - the train window
or door and the glass that goes in it.

The original Metroliner instructions show this process in instructions like
this:
http://library.brickshelf.com/scans/4000/4558/4558-10.html

I imagine it is possible to do that same type of thing in ML-CAD although I
don't personally know how to do it.  To be honest, I haven't even looked
into it although I'm not sure why.  Probably because I've never seen a set
of instructions from ML-CAD that did that so I simply assumed that it can't.
What I have been doing is showing the glass addition process as a two step
call out.

See page 13 of this document to see an example:
http://www.carolinatrainbuilders.com/fmotm/0201/CTB-1116-std.pdf

So I will have a sub-model for the window, a sub-model for the left hand
door, one for the right hand door, one for the truck, one for the under
carriage, one for the roof and possibly one or two more depending on the
interior.

I have a top level model that puts all of these together in the right order
and wa-la - I have my model.  Historically I have used LD-Lite to generate
instruction quality images.  I export all of the sub-models to a
sub-directory and then invoke  LD-Lite on the sub-models with the
appropriate arguments to achieve the result I want in the final printed
instructions.

I exported all of the sub-models and operated on them independently so work
quickly and fine tune my LD-Lite arguments.  If I rendered the entire model
each time it made the process painfully long.

I would like to see LPub incorporate a similar ability.  It already
understands the hierarchy of an MPD file as per the discussion that began
this thread several days ago.  I would love to see some sort of list in the
GUI of all of the sub-models contained within the MPD and then under user
control, select one or more (check boxes?) to be processed by LPub.  I may
choose one set of settings for some of the sub-models and another group of
settings for another sub-model, and yet another group of settings for
something else.  Right now I would have to run LPub three times and save the
generated images in another location between runs to get the result I want.
As ean example, I will work on one sub-model at a fairly low resolution
until I am happy with all of the steps and their viewing angle.  Once I am
done with that, I want to fire off LPub with the high quality settings and
come back to it when it is done.

Ideally I would like to build up a recipe for LPub generation for a model.
I would iterate through my sub-models refinining settings, tweaking my MPD
until  I was happy with each step.  For example, I may want to generate the
images for all of the sub-models that will end up as call outs in the final
instruction book with a light yellow background.  Once my recipe was
complete I would crank up a top level run on the whole design for a final
set of images.

For any of you electrical engineers out there, my thought process is not
unlike an ASIC design.  Perform all of the block level synthesis
independently until each block is correct.  Once all of the blocks are done
(well they're never really done but you have to tape out at some point) then
tie it together with a top level, top down synthesis.

So I guess what I am asking for is the ability to work with the sub-models
of my design without having to manually decompose my MPD file in order to do
so.

I hope this makes sense, let me know if something is confusing.

Mike

PS:  One other thing - I would like to be able to specify an output
directory so all of my generated images end up in a particular directory.

--
Mike Walsh - mike_walsh at mindspring.com
http://www.ncltc.cc - North Carolina LEGO Train Club
http://www.carolinatrainbuilders.com - Carolina Train Builders
http://www.bricklink.com/store.asp?p=mpw - CTB/Brick Depot



Message is in Reply To:
  Re: Proposed solution for Building Instruction scale issue
 
"Kevin Clague" <kevin_clague@yahoo.com> wrote in message news:H8vv2I.6M3@lugnet.com... (...) paradigm. (...) them (...) I have added lugnet.inst to this post as there seems to be a lot of LPub related traffic in that group and the topic of my post (...) (22 years ago, 18-Jan-03, to lugnet.cad, lugnet.inst)

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