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| 15:43.11 | Notify | 03BRL-CAD Wiki:Mariomeissner * 10240 /wiki/User:Mariomeissner/logs: |
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| 16:00.59 | mario_ | Hi! I can't make rtweight load my .density file. It always throws segmentation fault. Any suggestions? |
| 16:03.49 | brlcad | mario_: do you know how to use a debugger? what's the backtrace? |
| 16:04.34 | brlcad | starseeker: gdal's CMakelist seems to be loading global cflags... now sure how to make it not do that |
| 16:04.49 | mario_ | I'm using the Ubuntu subsystem on Windows, so I don't know how I would load a debugger there |
| 16:05.08 | brlcad | type "gdb", does it run? |
| 16:05.46 | mario_ | yes it does |
| 16:05.54 | brlcad | then you have a debugger ;) |
| 16:05.59 | mario_ | cool! |
| 16:06.10 | brlcad | gdb --args path/to/rtweight ...options... |
| 16:06.18 | brlcad | then at the gdb prompt: |
| 16:06.22 | brlcad | gdb> run |
| 16:06.40 | brlcad | it should segfault and bring you back to gdb> prompt |
| 16:06.47 | brlcad | gdb> backtrace |
| 16:07.05 | brlcad | that should say exactly where it died |
| 16:07.33 | mario_ | oh thank you! I'll come back with the backtrace if i can't figure it out |
| 16:07.47 | brlcad | k, sounds good :) |
| 16:07.58 | brlcad | learning how to use a debugger is an essential skill, very useful |
| 16:08.10 | brlcad | i suggest going through a quick 10 minute tutorial for the basics |
| 16:08.23 | brlcad | far more powerful than printf() debugging that most people start with |
| 16:08.36 | mario_ | I love the eclipse debugger ;) but never really used a command line one |
| 16:08.54 | mario_ | ill go through some tutorial yeah |
| 16:08.57 | mario_ | thank you for the suggestion! |
| 16:09.19 | brlcad | the eclipse debugger is almost certainly gdb |
| 16:09.32 | mario_ | ye but with a nice interface :P haha |
| 16:09.35 | brlcad | this would just be teaching you what those buttons are doing |
| 16:10.02 | brlcad | nice interface fails you when you need to go anywhere else, like now |
| 16:10.14 | brlcad | or another platform, or another compiler, or another language, or ... |
| 16:10.32 | mario_ | yeah true |
| 16:10.34 | brlcad | that's why learning the lower-level concept is generally considered essential |
| 16:10.38 | brlcad | https://www.cs.umd.edu/~srhuang/teaching/cmsc212/gdb-tutorial-handout.pdf |
| 16:10.43 | brlcad | that looks to be a decent intro |
| 16:10.44 | mario_ | god damnit, its failing to build rtweight now |
| 16:10.46 | brlcad | quick read |
| 16:11.11 | mario_ | pnglibconf.h: No such file or directory # include "pnglibconf.h" |
| 16:17.01 | Notify | 03BRL-CAD:brlcad * 70285 brlcad/trunk/src/other/gdal/CMakeLists.txt: for some reason, the gdal tests and flags seem to be affecting more than intended. looks like -Wl,--no-undefined is succeeding and then failing on all the general header/type/function tests, many of which overlap with our tests. |
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| 16:18.43 | brlcad | mario, that's a bizarre error .. it implies you don't have a successful cmake |
| 16:19.06 | brlcad | of your trying to compile manually and haven't specified the right directories |
| 16:23.33 | mario_ | Ill rerun cmake |
| 16:23.49 | mario_ | I was just running make rtweight like always |
| 16:23.53 | mario_ | used to work just fine |
| 16:28.16 | mario_ | nope, same still happens |
| 16:46.42 | mario_ | Ill reboot.. |
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| 17:06.51 | mario_ | ive done everything in my power to try to solve it |
| 17:06.55 | mario_ | but problem persists |
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| 18:09.12 | starseeker | brlcad: that's surprising, I wouldn't have expected those assignments to have global scope |
| 18:13.04 | starseeker | testing bullet just after ejno got done with it, I'm seeing the same issues |
| 18:14.01 | starseeker | ejno: are you able to do a successful bullet run, either with trunk or the revision where you wrapped up work on it? |
| 18:14.20 | starseeker | I'm trying to drop the tank car on an arb8, and it's inter-penetrating |
| 18:16.46 | ejno | hey starseeker, thanks, i'm looking into that |
| 18:18.33 | ejno | would you mind uploading the db somewhere if you still have it? |
| 18:18.36 | starseeker | sure |
| 18:19.29 | starseeker | http://brlcad.org/~starseeker/sim_test.g |
| 18:19.45 | ejno | thanks! |
| 18:20.09 | starseeker | part of it may be the object size, but unless you scaled the tc before it did work... |
| 18:20.42 | starseeker | if the scale is that critical, we'll need to auto-scale the scene down to bullet's dimensions and then scale the results back up for the .g somehow... |
| 18:20.45 | ejno | so this used to work before i made the changes? |
| 18:21.10 | starseeker | it doesn't seem so, based on my testing, but I was trying to reproduce your video demo scene |
| 18:21.14 | starseeker | which did work... |
| 18:21.25 | starseeker | I may have done something wrong |
| 18:21.25 | ejno | ah |
| 18:22.06 | ejno | it's probably related to the scaling |
| 18:22.20 | starseeker | I've got another demo I'm trying to assemble - a scaled up ktank dropping onto our example dsp - that has similar issues even which I scaled the overall scene down |
| 18:22.23 | starseeker | ndos |
| 18:22.26 | starseeker | nods even |
| 18:23.16 | starseeker | ejno: how hard would it be to pull the bbox of the scene, and scale it down pre-bullet for simulation so it fits in the "safe" size range? |
| 18:23.30 | starseeker | then scale it back up after simulation |
| 18:27.01 | starseeker | ejno: I may have lost a build definition or two (in particular float vs. double) when I pulled the bullet srcs under libged, so that's another possibility (although I'm seeing the same behavior with older builds, so it seems unlikely) |
| 18:27.23 | ejno | it's something i've been thinking of. probably a week or so, and i'll work on it |
| 18:27.37 | starseeker | ejno: cool, thank you! |
| 18:28.02 | ejno | glad to do it |
| 18:28.20 | starseeker | it's getting tantelizing now, with a demonstrated run on Windows :-) |
| 18:29.29 | starseeker | if you like I can also prepare an example with the dsp/ktank setup, although that may need that feature we talked about earlier of generating sweep bounding boxes in the direction of motion to cut down the size of the pieces bullet is looking at... |
| 18:34.41 | ejno | thank you, i agree though, that's probably not necessary until the scaling work is done |
| 19:00.45 | Stragus | Eh, I didn't think Bullet would be satisfactory for your physics needs. It detects collisions _after_ the fact then artificially push things away until they don't collide |
| 19:00.54 | Stragus | It's good enough for games I suppose |
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| 19:36.35 | Notify | 03BRL-CAD:brlcad * 70286 brlcad/trunk/src/other/gdal/port/cpl_port.h: mac provides locale_t via the xlocale.h header .. pretend they're one in the same until we observe otherwise. |
| 20:08.52 | brlcad | starseeker: I might have misread the output, but it looked like all the gdal tests were nearly all failing because of the -Wl,--no-undefined flag first passing successful but then causing all subsequent gdal tests to fail |
| 20:09.28 | brlcad | and since gdal's header/type/etc tests happened before ours, the cached result seemed to be a lot disabled that shouldn't have been |
| 20:14.38 | brlcad | Stragus: I don't recall having ever asserted bullet's simulation as being inadequate, at least not where you'd end up using it in cad modeling where it's almost entirely used to get objects to come into contact (e.g., per gravity) as part of some modeling operation or demonstration |
| 20:15.23 | brlcad | now for v/l sim or anything high order, that's another issue ... wouldn't use it for that except maybe to fly out fragments |
| 20:15.53 | brlcad | relatively low velocity, low forces, or easily time-stepped stuff |
| 20:16.10 | brlcad | hi caen23 |
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| 20:36.42 | caen23 | hi :D |
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