| 00:29.23 | Notify | 03BRL-CAD:n_reed * 62593 (brlcad/branches/brep-debug/src/libbrep/boolean.cpp brlcad/branches/brep-debug/src/libbrep/debug_plot.cpp brlcad/branches/brep-debug/src/libbrep/intersect.cpp): sub_curve sometimes returned a non-NULL result given a degenerate interval. Make it throw an exception so we never leave a degenerate interval unhandled. |
| 00:32.40 | Notify | 03BRL-CAD:n_reed * 62594 (brlcad/branches/brep-debug/src/libbrep/brep_except.h =================================================================== and 44 others): exception classes moved to separate file |
| 00:39.30 | Notify | 03BRL-CAD:starseeker * 62595 (brlcad/branches/dm-work/include/dm.h brlcad/branches/dm-work/src/libdm/dm-generic.c brlcad/branches/dm-work/src/mged/dozoom.c): Fix illumination |
| 00:40.49 | *** part/#brlcad chick_ (~chick@41.205.22.41) | |
| 00:51.18 | Notify | 03BRL-CAD:starseeker * 62596 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h and 2 others): Make a couple functions to set the DOWN flags for all solids. |
| 01:02.11 | Notify | 03BRL-CAD:starseeker * 62597 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/zap.c): refactor zap headSolid code |
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| 11:49.32 | Notify | 03BRL-CAD:indianlarry * 62598 brlcad/trunk/src/librt/primitives/brep/brep.cpp: Added function PointInPolygon() based off of private function found in clipper library that is used to determine if point is inside of a polygon. Also added ShiftInnerLoops() that is called from poly2tri_CDT()'s closed surface checking routine to make sure holes don't need shifted across a closed seam so that they are inside of the outer |
| 11:49.33 | Notify | polygon. |
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| 13:36.08 | Notify | 03BRL-CAD:starseeker * 62599 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/how.c): refactor solid list out of how.c |
| 13:39.50 | Notify | 03BRL-CAD:starseeker * 62600 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/nirt.c): Hide wflag setting |
| 14:04.30 | Notify | 03BRL-CAD:starseeker * 62601 (brlcad/branches/dm-work/src/libged/CMakeLists.txt brlcad/branches/dm-work/src/libged/display_list.c and 3 others): Break plotting of solids out into a routine for ged_plot |
| 14:22.00 | Notify | 03BRL-CAD:starseeker * 62602 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/png.c): refactor png logic |
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| 14:34.18 | Notify | 03BRL-CAD:starseeker * 62603 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/polybinout.c): rework polybinout |
| 14:49.10 | brlcad | kanzure: api docs say it appends a copy |
| 14:49.40 | brlcad | the array arg is a const parameter |
| 15:02.56 | Notify | 03BRL-CAD:starseeker * 62604 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/ps.c): refactor ps |
| 15:04.16 | kanzure | got it |
| 15:04.20 | kanzure | brlcad: http://verbnurbs.com/ |
| 15:12.50 | Notify | 03BRL-CAD:carlmoore * 62605 (brlcad/trunk/src/librt/primitives/brep/brep.cpp brlcad/trunk/src/util/bwrect.c brlcad/trunk/src/util/pixrect.c): cosmetic changes in bwrect.c & pixrect.c (files to look as much alike as possible), and fix spellings |
| 15:14.38 | Notify | 03BRL-CAD:starseeker * 62606 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/report.c): refactor report |
| 15:25.03 | Notify | 03BRL-CAD:starseeker * 62607 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/rt.c): Not quite all of it yet, but start reworking rt.c to clear headSolid. |
| 15:31.19 | Notify | 03BRL-CAD:starseeker * 62608 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/rt.c): finish removing headSolid from rt.c |
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| 15:46.45 | Notify | 03BRL-CAD:starseeker * 62609 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/select.c): refactor select |
| 15:56.18 | Notify | 03BRL-CAD:starseeker * 62610 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h brlcad/branches/dm-work/src/libged/set_transparency.c): Remove the last headSolid use in libged in functional code. This is still an ugly, hack-and-slash stage - the next step will be to look at how to abstract things to allow both default behaviors for libged and the ability for a |
| 15:56.20 | Notify | particular dm to override things (png image creation, for example, would be a candidate). |
| 16:04.12 | Notify | 03BRL-CAD:starseeker * 62611 (brlcad/branches/dm-work/src/libged/autoview.c brlcad/branches/dm-work/src/libged/bigE.c and 26 others): Remove solid.h from most of the individual files in libged - not properly a private header yet, but need to clear out these includes before we can get there. |
| 16:06.48 | *** join/#brlcad konrado (~konro@41.205.22.54) | |
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| 18:12.19 | Notify | 03BRL-CAD:starseeker * 62612 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h): remove some items no longer needed in ged_private.h |
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| 18:34.12 | Notify | 03BRL-CAD:starseeker * 62613 (brlcad/branches/dm-work/src/libged/bot_dump.c brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h): Approach the bot_dump hiding more like the other commands. Need to avoid any exposure of individual struct solid objects if this is going to work. |
| 18:54.12 | Notify | 03BRL-CAD:n_reed * 62614 brlcad/branches/brep-debug/src/libbrep/intersect.cpp: Since ON_PolylineCurve::Split() snaps parameters within tolerance to the domain ends, we have to handle parameters within that tolerance specially when creating a subcurve. |
| 19:33.10 | Notify | 03BRL-CAD:starseeker * 62615 (brlcad/branches/dm-work/src/libged/display_list.c brlcad/branches/dm-work/src/libged/ged_private.h): Start trying to ease the callbacks for struct solids out of the main logic loops - if we can do these updates after the main logic without error, it's a major step towards getting struct solids out of the callback types. |
| 19:40.38 | Notify | 03BRL-CAD:starseeker * 62616 (brlcad/branches/dm-work/src/libtclcad/tclcad_obj.c brlcad/branches/dm-work/src/mged/dodraw.c and 2 others): inch towards switching from struct solid to struct display_list for callback... |
| 19:50.38 | Notify | 03BRL-CAD:starseeker * 62617 (brlcad/branches/dm-work/include/ged.h brlcad/branches/dm-work/src/libged/display_list.c and 4 others): switch to struct display_list instead of struct solid in libged callbacks. |
| 19:55.28 | Notify | 03BRL-CAD:starseeker * 62618 (brlcad/branches/dm-work/src/libged/bigE.c brlcad/branches/dm-work/src/libged/display_list.c and 2 others): the existing_sp is never used - remove it and hide another struct solid use. |
| 19:59.06 | brlcad | kanzure: nifty js lib there |
| 20:04.26 | kanzure | surface-surface is missing but this seems like the only missing piece |
| 20:05.16 | brlcad | n_reed: it looks like it has curve+curve, curve+surface, and surface+surface intersection functions, might be useful to compare |
| 20:05.51 | brlcad | missing? it looked like (from the docs) that it's there |
| 20:06.58 | brlcad | also, didn't look to see if it's doing everything in tessellation space, evaluating a tessellation, or if it's evaluating the actual geometry |
| 20:07.45 | Notify | 03BRL-CAD:starseeker * 62619 (brlcad/branches/dm-work/include/dm/bview.h brlcad/branches/dm-work/include/ged.h and 2 others): And now, solid.h comes entirely out of ged.h. Remaining exposures of struct solid other than display_list.c and libdm are in libtclcad and mged - the latter, in particular, makes extensive use of struct solid. |
| 20:20.27 | *** join/#brlcad konrado (~konro@41.205.22.54) | |
| 20:28.06 | konrado | Please i am new to cad and would like to find out how cad drawings or objects are actualy stored in files.For example what information is actualy stored about objects in the .g file of brlcad. I would like to get some pointer on how i can learn more about cad data exchange. |
| 20:29.08 | brlcad | hi konrado! for our .g format, we store pretty much exactly what is used to create those objects |
| 20:30.22 | brlcad | cad data exchange, however, is a pretty broad topic that entails understanding of geometry format representations and file formats (these are two separate albeit related concepts) |
| 20:32.06 | brlcad | our format supports hybrid representations, so you can have implicit and explicit representation types, with or without boolean operations (i.e., implicit feature edits), and we export to a number of other common formats (predominantly explicit polygonal formats) |
| 20:33.46 | konrado | brlcad: are csg and nurbs examples of geometry format representation? |
| 20:34.53 | brlcad | csg is a boolean operation (an implicit feature edit) that is usually associated with an implicit representation (lets call it "csg+implicit") |
| 20:35.06 | brlcad | csg+implicit is a geometry representation format |
| 20:35.28 | brlcad | nurbs is another geometry representation format (as is nurbs+csg) |
| 20:35.57 | brlcad | triangle or polygonal mesh geometry is yet another |
| 20:37.23 | *** join/#brlcad Izakey (~Isaac@41.202.196.204) | |
| 20:38.52 | konrado | What part of the brlcad code handles this representation? |
| 20:39.51 | brlcad | volumetric data is another (e.g., MRI/CT medical data), point cloud data (e.g., laser scan data from an xbox kinect) |
| 20:40.16 | brlcad | our librt library predominantly handles the representation |
| 20:40.38 | brlcad | though some formats are so utterly complicated that they are backed by libraries of their own |
| 20:41.15 | brlcad | our .g format is encapsulated by librt |
| 20:41.28 | Izakey | brlcad having some problems computing the curvature of the heart-shape. What do you suggest ? |
| 20:42.10 | brlcad | konrado: curious why this is of interest, just exploring / understanding or trying to accomplish something? |
| 20:42.24 | brlcad | there's a good paper on solid modeling that talks some about representation formats |
| 20:42.53 | konrado | brlcad: I am intereted in contributing to brlcad |
| 20:42.54 | brlcad | Izakey: look at some of the other primitives is probably the best suggestion |
| 20:43.19 | brlcad | konrado: awesome, what's your background? |
| 20:43.59 | konrado | brlcad: I have not done any cad related studies before |
| 20:44.20 | Izakey | I have obviously already done that brlcad. Still finding it hard understanding how the curvature of the torus was conceived. There are no comments in the code for example |
| 20:44.38 | brlcad | konrado: so then what's interest in how the data is stored? something in particular in mind? |
| 20:46.05 | brlcad | Izakey: yeah, it's really somewhat complicated .. read wikipedia at least? probably a good starting point |
| 20:46.25 | konrado | brlcad: you gave me task to make the converter convert object from a .g file without the user specifying the object and i have submitted a patch but it has not yet been reviewed |
| 20:46.59 | brlcad | konrado: yes, this I know .. I reviewed it briefly last week but couldn't integrate it at the time to close it out |
| 20:47.00 | Notify | 03BRL-CAD:carlmoore * 62620 (brlcad/trunk/doc/docbook/system/man1/en/pixbgstrip.xml brlcad/trunk/src/util/pixbgstrip.c): fixes to pixbgstrip |
| 20:47.11 | brlcad | i'm hoping to get back to it this week |
| 20:47.26 | brlcad | the quick read looked REALLY good |
| 20:47.35 | Izakey | I have done that. I read the entry of Curvature on Wikipedia. A little bit enlightening but when I compare that with what I see in the code base : The discrepancy is frightening |
| 20:48.01 | brlcad | discrepancy? |
| 20:48.21 | Izakey | Anyway, Is there a command used to test this curvature. I can use that to know if the heart's own is well written |
| 20:48.42 | brlcad | maybe start with a far simpler case, like rt_ell_curve() |
| 20:48.42 | Izakey | I mean that the theory and the code don't tie (at least for me) |
| 20:49.07 | brlcad | you can visualize the curvature! .. that's probably the best way :) |
| 20:49.27 | brlcad | man rt, but iirc, it's a lighting model option like -l5 |
| 20:49.50 | brlcad | that might help for understanding what the other primitives are doing too |
| 20:50.47 | Izakey | Okay. That one should help for curvature. |
| 20:51.25 | Izakey | What about centroid, surface area, volume functions. How do I test those ? |
| 20:53.18 | konrado | brlcad: Thanks for the compliment. I tested the patch and it works fine for me. I was waiting for it get reviewed so i can also move on to the other converters. |
| 20:54.54 | konrado | brlcad:I am primarily interested in cad data exchange and would like to work basicaly on the brlcad converters. |
| 20:55.14 | brlcad | Izakey: you can test centroid and volume with the gqa command/tool |
| 20:56.02 | Izakey | Thanks brlcad. A good mentor you are. |
| 20:56.04 | brlcad | it will sample the heck out of the geometry and (if the ray tracing is implemented correctly) will converge to the correct centroid and volume within some specified tolerance |
| 20:56.57 | brlcad | we don't yet have a good way to estimate surface area with that same approach (but that'd be a great extension of gqa .. it has all the information needed) |
| 20:57.27 | brlcad | konrado: understood about needing feedback before you can move on to the other converters |
| 20:58.04 | brlcad | konrado: fantastic to hear about the converters, but are you stuck with where you're currently with pov? |
| 21:00.24 | konrado | brlcad: I am the one working the g-pov converter |
| 21:00.40 | brlcad | I know, that's why I'm asking if you got stuck :) |
| 21:00.40 | konrado | brlcad: I am not the one working the g-pov converter |
| 21:00.51 | brlcad | ooooh, my bad! |
| 21:00.59 | brlcad | well shoot, you need your own then :) |
| 21:01.18 | brlcad | are you comfortable reading files in binary and working with structs? |
| 21:01.32 | konrado | brlcad: Yes i am |
| 21:01.48 | brlcad | then might I recommend implementing a sat-g importer |
| 21:02.23 | brlcad | it's the Solidworks file format, which is one of the most prolific and older file formats around |
| 21:02.36 | brlcad | and you can read all about it here: http://paulbourke.net/dataformats/sat/sat.pdf |
| 21:03.32 | konrado | brlcad: Thanks i would be glad to such task. |
| 21:05.41 | konrado | I just check out the pdf and i think this task would help me understand cad data exchange better. |
| 21:06.01 | brlcad | you can easily find sat files around the web with google searches, just search for a keyword like "filetype:sat acis" |
| 21:06.40 | brlcad | undoubtedly will help .. the sat file format is pretty detailed and will strongly introduce you to boundary representation nurbs geometry |
| 21:07.02 | brlcad | last pov |
| 21:07.06 | Izakey | Is this "filetype:sat acis" Python code brlcad ? |
| 21:07.13 | brlcad | gurwinder was pov |
| 21:07.36 | brlcad | Izakey: nope, that's something you'd type into a google search to find some .sat files |
| 21:08.12 | brlcad | give it a try |
| 21:08.28 | brlcad | filetype is loads of fun ;) |
| 21:09.08 | Izakey | It's some programming of some some right ? |
| 21:09.25 | brlcad | not at all |
| 21:09.30 | Izakey | some form |
| 21:10.19 | Izakey | Got some results from that |
| 21:10.20 | brlcad | yes, there is a form .. they call them search operators |
| 21:10.37 | Izakey | That's it. |
| 21:10.55 | brlcad | but it's the same that lets you limit what servers you get search results from too (e.g. "milk site:wikipedia.org") |
| 21:11.01 | Izakey | Are they mark-ups / |
| 21:11.04 | Izakey | ? |
| 21:11.18 | brlcad | https://support.google.com/websearch/answer/136861?hl=en |
| 21:12.15 | brlcad | of course that one doesn't list filetype: heh |
| 21:12.44 | brlcad | better: http://www.sourcinghacks.com/google-search-operators-and-more/ |
| 21:15.29 | Izakey | With this chat I can make more rapid progress with finishing the heart. And learned about Search operators too |
| 21:15.43 | Izakey | Good night |
| 21:15.59 | brlcad | konrado: another desirable importer we don't have is vrml (explicit polygonal representation) |
| 21:16.23 | brlcad | buenas noches izak |
| 21:17.04 | brlcad | konrado: vrml is much more simple, but you'd probably want to use an existing library to read in the vrml data instead of trying to write a parser on your own |
| 21:17.32 | konrado | brlcad: Yes i just saw something about that format while surfing the web today |
| 21:18.01 | brlcad | so pick your poison or do one then the other ;) |
| 21:18.43 | brlcad | sat is probably more fun because you basically have to write a parser, but might get really complicated |
| 21:19.17 | brlcad | vrml is easier, but you have to learn how to use someone else's library (or write an even harder parser) |
| 21:19.54 | konrado | brlcad: Do all this implimentation require proper knowledge of geometry format representations and file formats |
| 21:20.13 | Notify | 03BRL-CAD:starseeker * 62621 brlcad/branches/dm-work/src/mged/chgview.c: Should be able to let ged_zap and dl_zap under it use the ged_free_vlist_callback to do the cleanup... |
| 21:20.17 | konrado | ? |
| 21:21.02 | brlcad | sort of but not really |
| 21:21.14 | konrado | brlcad: When reading a book on cad what should be my point of focus? |
| 21:21.54 | konrado | brlcad:In other to be able to handle cad data exchange |
| 21:22.00 | brlcad | if you're dealing with geometry, the format of that geometry will usually matter and it'll be quite apparent when you have to convert from one format to another because it's usually painful and lossy |
| 21:22.52 | brlcad | some conversions are lossless ... we're a hybrid system, for example, so we have containers for most formats ... so writing an *importer* is easy |
| 21:23.05 | brlcad | exporting, it depends on what format or CAD system you're exporting to |
| 21:23.28 | brlcad | I don't recommend any particular book on CAD |
| 21:23.36 | brlcad | the resources on the web are prolific |
| 21:24.13 | konrado | brlcad: Would have to deal with mainly with conv/ and librt/ for this task |
| 21:24.37 | brlcad | yep |
| 21:24.44 | brlcad | mainly src/conv |
| 21:25.06 | Notify | 03BRL-CAD:carlmoore * 62622 brlcad/trunk/doc/docbook/system/man1/en/pix-orle.xml: minor touchup of pix-orle; more, such as removal of -h, cannot be done since I can not locate source code for this command |
| 21:25.28 | brlcad | if you implement sat-g, you'll probably want to look at how 3dm-g creates geometry as what you'll probably need is VERY similar |
| 21:26.22 | brlcad | if you implement vrml-g or x3d-g, you'll probably want to look at ply-g.c |
| 21:26.35 | konrado | I was just about asking your opinion on existing converters to base on |
| 21:27.16 | brlcad | you can always start from scratch and just figure it out as you go along ;) |
| 21:30.50 | konrado | i would start with implementing from scratch and use a library if it get to complicated since there is more to learn starting from scratch |
| 21:31.35 | brlcad | there is no library for sat |
| 21:32.29 | brlcad | implementing vrml/x3d from scratch is something I'd hesitate even attempting unless you've written other complex parsers before .. that's nearly full SGML syntax |
| 21:32.39 | brlcad | sgml/xml |
| 21:32.57 | brlcad | that's NO fun... :) |
| 21:33.25 | konrado | Wow! |
| 21:35.25 | konrado | My interest in the open source is all about learning new stuff so i would put in my best |
| 21:38.37 | konrado | It would mean alot for me to impliment something or add some enhancement to brlcad |
| 21:41.16 | brlcad | I suggest giving x3d-g a try first (using openvrml), it's just a little bit easier and it'll give you a solid foundation to tackle harder geometry |
| 21:41.39 | konrado | I learnt about brlcad from Izakey. We used to live in thesame neighborhood |
| 21:41.48 | brlcad | ah, awesome! |
| 21:42.00 | brlcad | he's a good guy |
| 21:42.03 | konrado | also Check Nyah |
| 21:42.17 | brlcad | he'd show you the book he helped write if I'd finish putting it in the mail |
| 21:43.56 | brlcad | that's another thing I need to get back to .. reformatting that and getting stickers printed |
| 21:44.21 | konrado | Ok goodnite |
| 21:44.26 | brlcad | konrado: we're here all the time, so hang out and have fun ... someone is usually here ;) |
| 21:44.38 | brlcad | share your progress if you like, even if nobody responds |
| 21:44.42 | brlcad | many are listening ;) |
| 21:44.46 | brlcad | cheers! |
| 21:45.14 | konrado | Thanks i had a great time. |
| 23:03.28 | kanzure | brlcad: missing yes, frontpage says "Algorithms for surface-surface intersection are in the works" and i don't see it in the source code |
| 23:16.14 | Notify | 03BRL-CAD:n_reed * 62623 brlcad/branches/brep-debug/src/libbrep/boolean.cpp: fix handling of segments with opposite directions; don't depend on segment order for loop construction |