IRC log for #brlcad on 20120912

00:12.07 CIA-68 BRL-CAD: 03starseeker * r52431 10/brlcad/trunk/src/librt/test_botpatches.cpp: Start working on loop assembly
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03:18.08 brlcad elf_: that looks better, though should clarify whether the ground plane must be named gp or gp.r
03:18.51 brlcad and why
03:20.18 brlcad and for the animation, it's not exactly like the fly-around but is similar in how you'll make the animation
03:20.27 brlcad you don't need to spin the view around
03:21.13 brlcad you just want to simulate a step (or 10 or 100 or whatever makes a tiny step), render a frame, simulate, render, etc .. then pull all those renderings into an animation
03:21.23 brlcad that's best/easily done with a script
04:45.51 elf_ brlcad, so I should have a loop, where I simulate a tiny step, then render a frame? right?
04:56.15 brlcad yes
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13:36.12 elf_ brlcad, I have some problems trying to understand how should I get the regions and groups from the database into the simulation
13:37.49 elf_ I get it that there in the the for loop should be a mged sim.g simulate n(where n is number of steps) command and also an rt -o image$i.pix command
13:38.17 elf_ but how does the simulation know from where to take the regions?
14:24.57 elf_ I think I figured that one out
14:25.23 elf_ here's what the script looks like http://paste.ubuntu.com/1200642/
14:25.35 elf_ waiting for a small simulation to run and see if it works
14:25.44 elf_ properly I mean
14:54.57 elf_ this is the way I think the script should be http://paste.ubuntu.com/1200687/
14:55.00 brlcad elf_: script needs a little tlc -- don't need the -M option to rt
14:55.21 brlcad probably best to just pass -a -e parameters for azimuth elevation
14:55.23 elf_ but I get some errors http://paste.ubuntu.com/1200689/
14:55.55 brlcad if you remove the -M, you don't need the two EOF lines (which aren't right btw)
14:55.58 elf_ okay, will do that though when I try to get a png image
14:56.01 brlcad at least, not useful
14:56.24 brlcad if you want a png, put -o image.png instead of image.pix
14:56.27 elf_ <PROTECTED>
14:56.37 brlcad and it's probably right
14:56.50 brlcad with the -M option, that says you're going to provide an rt command script
14:57.08 brlcad your command script (the lines *between* your two EOF lines) ... is .... empty
14:57.20 brlcad so it had nothing to do, not pix file results
14:57.40 brlcad if you remove the command script (the -M option), it'll default to a single frame render like you want
14:58.17 elf_ right, initially wanted to set some scene like in OpenGl the eye point and such but that must be done in an additional tcl script right?
15:00.23 brlcad nope, you have the right idea with the -M rt script
15:01.02 brlcad you just can't leave it empty, that's what tells rt what to do
15:01.24 brlcad if you run the "saveview" command in mged, you can save a given view script to a file
15:01.47 brlcad that will have the exact rt view information and command you'll need to set a specific view
15:02.45 elf_ okay, will do that for the moment I got rid of the -M and the 2 EOF lines
15:03.00 elf_ but I still get the error about image$i.pix not existing...
15:05.20 elf_ how can you change the way a db is opened? I get the error that the current db is read only
15:06.48 elf_ also "db5_get_raw_internal_fp() : Database is too short, want=67448, got=11975 db_dirbuild(home/elf/brlcad/su.g):db_scan() failed"
15:21.45 brlcad run the rt command outside of the script first, just on the command line
15:23.31 brlcad on the unix command line, get that to work, then put it in your script
16:24.12 elf_ solved it
16:24.54 elf_ here's the simulate.sh without the -M option the elevation is given in the command so no need for a rt script
16:25.05 elf_ http://paste.ubuntu.com/1200812/
16:25.26 elf_ and here's the simulate.sh with the -M option http://paste.ubuntu.com/1200811/
16:26.26 elf_ both of them are on the mged_simulation wiki page http://brlcad.org/wiki/Mged_simulation
16:26.48 elf_ and added an explanation about why the ground plane should be named "gp" also
17:19.50 elf_ about the movie, what do you recommend to use?
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20:51.43 brlcad elf_: scripts look good, though I would reverse their order in your tutorial where you can first describe how to create a simple animation first, then explain the rt command script and how to set that up
20:52.08 brlcad you don't explain where those numbers come from or how to get them or what they do
20:53.36 brlcad remember, you're aiming for a complete newbie audience -- if your mother were reading this, would she have enough information to not just reproduce what you did, but understand it enough to create her own animation?
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