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Releases: BRL-CAD/brlcad

BRL-CAD 7.26.4

19 Mar 18:39
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----------------------------------------------------------------------
--- 2017-09-22  Release 7.26.4                                     ---
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This is a patch release, primary focused on updates to the build
system logic.

* upgraded libgdiam to version 1.0.3 - Cliff Yapp
* fixed MGED bindings behavior for c, A, P, and S chars - Bob Parker
* fixed gdiff usage statement - Sean Morrison
* removed anim.txt, sun.txt, tube.txt and movie.txt - Cliff Yapp

BRL-CAD 7.26.2

19 Mar 18:39
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----------------------------------------------------------------------
--- 2017-06-10  Release 7.26.2                                     ---
----------------------------------------------------------------------

Among a variety of bugs fixed, the patch corrects a critical error in
BoT triangle mesh ray tracing.  For improved performance, it also
changes the default frame buffer display behavior to fully buffer ray
tracing images instead of displaying them incrementally.  A variety of
MGED commands see improvements too with 'ls' now supporting listing
objects by their on-disk size and the 'simulate' command applying
forces on objects (e.g., gravity) with greater ease.  Not yet
complete, there is a new interface being developed for resolving
overlaps more efficiently, currently under development and usability
testing with select users.  Lastly, a number of dependencies were
upgraded, including Tcl/Tk, in order to patch security vulnerabilities
and address portability issues.

* upgraded Tcl/Tk from 8.5.9 to 8.5.19 - Sean Morrison
* fixed background color setting in MGED - Cliff Yapp
* upgraded libpng to version 1.6.29 - Cliff Yapp
* upgraded zlib to version 1.2.11 - Cliff Yapp
* reduced 'shade_inputs' flipped normal reporting - Sean Morrison
* numerous 'simulate' command enhancements and fixes - Jon Engbert
* fixed rtweight .density file loading on Windows - Cliff Yapp
* fixed dsp handling of invalid uniform binary objects - Sean Morrison
* fixed brlman problem with viewing benchmark man page - Cliff Yapp
* fixed name of dbfind man page (was listed as 'find') - Cliff Yapp
* added -H option to ls for human readable size reporting - Cliff Yapp
* added -S option to ls command for size based sorting - Cliff Yapp
* improved 'loadview' command view script handling - Sean Morrison
* fixed TIE raytracing for zero thickness BoTs - Cliff Yapp
* added Wavefront OBJ File->Open GUI support in Archer - Cliff Yapp
* fixed attr show error printing large attribute values - Cliff Yapp
* fixed rt support for lights created prior to rel 6.0 - Sean Morrison
* fixed infinite loop bug in when using shadow lights - Sean Morrison
* removed man pages: erase_all, export_body, vrmgr, dall - Cliff Yapp
* fixed MGED 'c' command crash when run with bad arguments - Nick Reed
* added manual pages for the 'brlman' and 'man' commands - Cliff Yapp
* improved gdiff default grid spacing and tolerancing - Cliff Yapp
* updated brlman to support browsing all page categories - Cliff Yapp
* added support for .rtwizardrc configuration file - Cliff Yapp
* renamed MGED gdiff grid spacing -t option to -g - Cliff Yapp
* updated MGED gdiff default drawing options to -l -r - Cliff Yapp
* removed MGED gdiff -R option, now default behavior - Cliff Yapp
* replaced obsolete 'g_diff' manual page with 'gdiff' - Cliff Yapp
* improved 'keep' error message when file is not created - Cliff Yapp
* improved rtwizard window sizing and "RtWizard" titling - Cliff Yapp
* brep command attaches .brep suffix instead of _brep - Sean Morrison
* changed ogl & wgl framebuffer delayed write behavior - Sean Morrison
* upgraded freetype to version 2.6.5 - Cliff Yapp
* fix rtedge foreground/background color options - Jon Engbert
* support rt -C colors specified as 0-255 or 0.0-1.0 - Jon Engbert
* fixed xpush bug leaving stray top-level objects - Nick Reed
* removed MGED wrapper 'mged.bat' batch script on Windows - Cliff Yapp

BRL-CAD 7.26.0

19 Mar 18:41
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The "gcv" executable that supports the newer FASTGEN conversion
capabilities isn't installed by default with the 7.26.0 source
tarball.  To enable it, apply the patch file as follows:

(download brlcad-7.26.0.tar.gz and rel-7-26-0-2.patch)
tar -xvf brlcad-7.26.0.tar.gz
cd brlcad-7.26.0
patch -p0 < ../rel-7-26-0-2.patch

BSD binaries were built on FreeBSD 10.3-STABLE amd64
System libz, libregex, libpng and libfreetype were used.

----------------------------------------------------------------------
--- 2016-08-08  Release 7.26.0                                     ---
----------------------------------------------------------------------

This major release of BRL-CAD culminates several years of development
effort to provide robust explicit boundary representation (BREP)
Non-uniform Rational Basis Spline (NURBS) import and ray tracing
analysis support.  Compared to previous polygonal mesh (BoT) methods,
NURBS offer superior interoperability with other CAD systems, faithful
shape-preserving import, and significantly reduced model sizes.  NURBS
may be imported from the ISO STEP (AP203) and Rhino 3DM file formats,
both with improved hierarchy preservation and entity support.

Unprecedented in BRL-CAD's history, this release initiates steps to
significantly reduce complexity and improve usability.  Many features
are being consolidated, reorganized, and removed via BRL-CAD's
deprecation process.  There are widespread documentation system
enhancements including new manual pages, improved command usage,
better help facilities, and more.

This release introduces the 'gcv' and 'icv' tools for geometry and
image conversion respectively.  These plugin-architecture tools are
intended to eventually consolidate and replace all of BRL-CAD's
conversion and processing functionality into an easy universal
interface for users and application developers.  GCV currently
supports import and export of STL, 3DM, OBJ, VRML, and FASTGEN
geometry as well as mesh decimation, facetization, and solidity
testing.  The new FASTGEN exporter implements extensive compatibility
feature mapping for round-trip geometry conversion.

Ray tracing performance on Windows is vastly improved on symmetric
multiprocessing (SMP) multicore and multiple CPU systems.  Implemented
as 'datum' objects, BRL-CAD provides new modeling support for
reference points, lines (axes), and planes.  Major features still
under experimental development include NURBS Boolean evaluation, a new
marching cubes method for polygonal mesh export, rigging joints for
constrained geometry articulation, and an OpenCL-accelerated high
performance ray tracing pipeline.

* mass-deprecation of 121 command-line utilities - BRL-CAD Developers
* fixed bad args crash in metaball 'in' command - Cliff Yapp
* added manual page for lt comb child listing command - Cliff Yapp
* added lt -c option for specifying separation character - Bob Parker
* improved hierarchy preservation in 3dm-g importer - Jon Engbert
* fixed upside down 'screengrab' images on some platforms - Nick Reed
* updated wireframe drawing to respect primitive colors - Cliff Yapp
* updated pixdiff & pixcmp to only compare same sizes - Cliff Yapp
* fixed running archer from read-only filesystems - Cliff Yapp
* fixed patch-g tool and E command infinite loop bug - Sean Morrison
* improved NMG ray tracing fault tolerance - Sean Morrison
* added 3dm-g support for layers and names - Keith Bowman
* fixed issue preserving color/shader info with 3dm-g - Jon Engbert
* added 3dm-g support for mesh objects - Jon Engbert
* added csg implicit hierarchy conversion to brep command - Cliff Yapp
* fixed crash in clone when told to make zero copies - Cliff Yapp
* fixed crash in search when using -above option - Cliff Yapp
* extended nirt to list current and available formats - Sean Morrison
* fixed NURBS wireframe drawing crash - Cliff Yapp
* fixed firing of single rays using the rtshot tool - Sean Morrision
* removed pixread.sh, pixwrite.sh; obsolete hardware - Sean Morrison
* removed cray.sh and sgisnap.sh; obsolete hardware - Sean Morrison
* removed cadbug.sh - use sourceforge tracker - Sean Morrison
* removed any-png.sh - use pix tools - Sean Morrison
* removed librtserver interface - Cliff Yapp
* removed MGED per_line command - Sean Morrison
* updated MGED tops command: default to -g -u behavior - Sean Morrison
* removed MGED -n option; use -c instead - Sean Morrison
* removed MGED commands pl, pov and polybinout - Sean Morrison
* removed UtahRLE image tools - Cliff Yapp
* improved rcodes command feedback in the no changes case - Cliff Yapp
* added brlman -S option to specify man page section  - Cliff Yapp
* modified rtg3 to avoid outputting excessive LOS - Nick Gerstner
* extended burst and rtg3 to output 5 digit ID numbers - Nick Gerstner
* improved draw command manual page documenation - Cliff Yapp
* added lc -m option to report multi-material/los regions - Cliff Yapp
* added new 'icv' image conversion tool w/ pix, bw, dpix, png, ppm
        - Mohit Daga, Cliff Yapp, Sean Morrison, Erik Greenwald
* ported 'burst' tool (batch mode only) to Windows - Cliff Yapp
* removed mged pl command, use plot command instead - Sean Morrison
* improved datum wireframes (yellow) and fixed arrowheads - Cliff Yapp
* added initial manual page for 'burst' ray dispatch tool - Cliff Yapp
* improved wireframe display list performance - Keith Bowman
* added draw -S for simplied wireframes, no subtractions - Cliff Yapp
* added draw -L# to draw bounding boxes for large objects - Cliff Yapp
* added 3dm-g instance reference and definition import - Jon Engbert
* minor rtwizard graphical user interface reorganization - Cliff Yapp
* fixed rtwizard edge and ghosted image bug on Windows - Bob Parker
* ported 'brlman' manual page viewer with GUI to Windows - Cliff Yapp
* added gdiff -h help command-line option - Cliff Yapp
* added facetize -m marching cubes option - Erik Greenwald
* removed -I interactive option from rt/rtedge/remrt - Sean Morrison
* improved pix-bw intensity averaging to closest integer - Cliff Yapp
* removed pix-bw3 & bw3-pix tools, see pix-bw & bw-pix - Cliff Yapp
* fixed pix-ppm to write out all image data - Sean Morrision
* added libnetpbm for ppm image format support in icv - Cliff Yapp
* added new algorithm to bot_decimate (via -f option) - Jon Engbert
* fixed benchmark bug running from paths with spaces - Sean Morrison
* fixed adjust command crash when working with BoTs - Daniel Roßberg
* removed fb-orle, orle-fb, orle-pix, and pix-orle tools - Cliff Yapp
* removed support for RLE v1 and v2 ('orle') image format - Cliff Yapp
* fixed datum type 'in' command unit conversion bug - Cliff Yapp
* fixed rpatch / patch-g line handling on Windows - Daniel Roßberg
* added 'arb8' surface area value to analyze command - Kalpit Thakkar
* added 'part' centroid reporting to analyze command - Brad Hollister
* added new pixcrop utility for cropping pix images - Carl Moore
* preliminary OpenCL-accelerated coherent ray tracing pipeline
        - Jon Engbert, Vasco Costa
* improved point cloud plot visualization - Sean Morrison
* fixed program freezing bug in MGED grouper command - Bob Parker
* added 'rhc' reporting to analyze command - Kalpit Thakkar
* improved command option and manual page consistency - Carl Moore
* added prefatory FASTGEN4 geometry export support - Jon Engbert
* added FASTGEN4 illegal thickness CCONE1 entity import - Cliff Yapp
* improved help message for 'tire' command - Cliff Yapp, Carl Moore
* improved option parsing and output options for gencolor - Carl Moore
* fixed saveview usage help string and running from archer - Nick Reed
* fixed and improved killtree man page - Nick Reed
* fixed composition bugs in pixmatte and pixmerge - Carl Moore
* fixed definition of "light year" in unit conversions - Cliff Yapp
* fixed duplicate name errors in dbconcat - Daniel Roßberg
* modernized documents and improved infrastructure - Hitesh Sofat
* added mirroring support for hrt primitive objects - Isaac Kamga
* added manual page documenting the STEP geometry format - Cliff Yapp
* ported the mged Overlap Tool to Windows - Sean Morrison
* improved NURBS prep performance for UV-remapped surfaces - Nick Reed
* fixed dbconcat -c crash when color table does not exist - Nick Reed
* swapped meanings of search's -above/-below options - Sean Morrison
* upgraded freetype to version 2.5.5 - Cliff Yapp
* updated libregex to apply a fix for CVE-2015-2305 - Cliff Yapp
* upgraded libpng to version 1.6.20 - Cliff Yapp
* added command window option for pasting tree view paths - Nick Reed
* improved 'bb' command digits and units output - Keith Bowman
* improved robustness of bb command oriented box option - Peter Amidon
* added example NURBS B-Rep geometry files from NIST - Cliff Yapp
* removed "high resolution" options from all commands - Carl Moore
* improved performance of archer loading large BoT models - Nick Reed
* added evaluated shaded drawing preference mode and menu - Nick Reed
* fixed .mgedrc creation corruption with closed database - Cliff Yapp
* extensive improvements to NURBS Boolean evaluation - Nick Reed
* added 'bot chull' for creating convex hull envelopes - Cliff Yapp
* new manual page for the g-voxel exporter - Mandarj
* improved performance of lc command - Peter Amidon
* updated manual page for MGED's brep command - Peter Amidon
* new manual page for the g-dot exporter - Shardul Chiplunkar
* added sketch centroid support the analyze command - Peter Amidon
* new Think. Invent. Create. splash screen for archer - Marc Tannous
* improved pix-bw to support dual output streams - Carl Moore
* added list option to attr command - Cliff Yapp
* added globbing support to attr command - Cliff Yapp
* added lc -0 option to return objects in tree order - Sean Morrison
* fixed crash in iges-g importer due to p...
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BRL-CAD 7.24.4

19 Mar 18:47
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----------------------------------------------------------------------
--- 2015-08-31  Release 7.24.4                                     ---
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* initial support for datum points, lines, and planes - Sean Morrison

BRL-CAD 7.24.2

19 Mar 18:48
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----------------------------------------------------------------------
--- 2014-06-02  Release 7.24.2                                     ---
----------------------------------------------------------------------

This patch release includes a plethora of significant bug fixes and
improvements to BRL-CAD including fixing ADRT/TIE fast triangle ray
tracing on 32-bit platforms, fixing an issue in our FASTGEN converter
that affected the import of very complex geometry models, upgrading
one of our third-party dependencies (libpng) in response to a
vulnerability report, and improving the 'comb' and 'search' commands
with new options for restructuring and searching geometry.
Enhancements continue to be made to our boundary representation (BREP)
NURBS infrastructure in support of hybrid representation modeling and
improved geometry interchange with other CAD systems.

* improved rcodes output to inform user what changed - Cliff Yapp
* fixed inside command for ellipsoid primitives - Cliff Yapp
* restored suppressed mged output after some commands - Cliff Yapp
* added rtwizard -s square image size option - Cliff Yapp
* documented image size options in rtwizard man page - Cliff Yapp
* added view center specification dialog to rtwizard - Cliff Yapp
* increased rtwizard window size for button visibility - Cliff Yapp
* image conversion -R/-G/-B options now require weight - Mohit Daga
* improved option consistency for image processing tools - Mohit Daga
* improved pipe ray tracing grazing hit behavior - Keith Bowman
* upgraded libpng, now at version 1.6.10 - Erik Greenwald, Cliff Yapp
* improved solid NURBS geometry ray tracing behavior - Keith Bowman
* fix z-clipping bug in mged's X display manager - Cliff Yapp
* added attribute sorting option to the 'attr' command - Tom Browder
* changed 'bwfilter' tool offset option from -o to -O - Mohit Daga
* gattributes section 5 man page renamed to attributes - Tom Browder
* changed 'benchmark' defaults: 2% deviation, 5 frames - Sean Morrison
* improved bwrect to handle redirected input and output - Mohit Daga
* upgraded boost to version 1.55.0 - Tom Browder
* fixed TIE mesh raytrace crashes on 32-bit platforms - Sean Morrison
* fixed pixscale and bwscale to not output ioctl error - Mohit Daga
* improved fast4-g import of numerous region groups - Richard Weiss
* fixed archer hidden line edit getting redrawn as shaded - Nick Reed
* fixed adrt/TIE polygonal mesh memory management bug - Richard Weiss
* fixed fast4-g importer parsing of blank input lines - Richard Weiss
* added -o flag to 'bb' command for oriented bounding box - Cliff Yapp
* allow search to see hidden combs with the -a flag - Cliff Yapp
* added comb -l lift option to change region designation - Cliff Yapp
* improved NURBS ray tracing grazing hit behavior - Keith Bowman
* print current grid information in gqa output - Cliff Yapp
* added -f option for flattening combs to 'comb' command - Cliff Yapp
* added support for -bool operation filtering in search - Cliff Yapp
* added new g-raw geometry converter - Jon Engbert, Daniel Roßberg
* improved g-stl usage and documentation - Jon Engbert
* added -c and -r region flag options to the comb command - Cliff Yapp
* added -p/-P point/line plot options to 'burst' tool - Sean Morrison
* added -w wrapping option to the 'comb' command - Cliff Yapp
* archer respects LIBRT_BOT_MINTIE environment variable - Bob Parker
* new 'cchannel' procedural geometry tool for C-Channel - Emory Huff
* improved 'comb' command error messages - Talwinder Saini
* pl -> plot3 rename for utilities and docs - Tom Browder, Cliff Yapp
* exposed 'coil' command within mged & archer - Alexandrus, Cliff Yapp
* added centroid reporting to 'analyze' command output - Csaba Nagy
* added arb8 centroid 'analyze' command reporting - Silviu Ungureanu
* pipe centroid, volume, & surface area analyze reporting - Csaba Nagy
* added ebm centroid 'analyze' command reporting - Michael Huang
* improved help option consistency across numerous tools - Carl Moore

BRL-CAD 7.24.0

19 Mar 18:49
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----------------------------------------------------------------------
--- 2013-06-13  Release 7.24.0                                     ---
----------------------------------------------------------------------

This major update to BRL-CAD comes after nearly a full year of
development.  This is the alpha release unveiling of Archer/MGED, a
preliminary interface update to BRL-CAD's graphical geometry editor.
As alpha software, this new MGED prototype aims to provide functional
feature parity with the antecedent MGED interface while introducing
various changes.  Included is an integrated graphical tree view, a
single window framework, drag-and-drop geometry editing, information
panels, shortcut buttons, improved polygonal mesh and 2D sketch
editing, level-of-detail wireframes, NURBS shaded display support, and
much more.  Prior to upcoming beta testing where the emphasis will
predominantly be on stability and usability, this alpha status
solicits feedback from the community on capability and features.

This release also includes various improvements to BRL-CAD's ray
tracing infrastructure including CPU thread affinity locking for
faster performance, more consistent grazing hit behavior, expanded
volume and surface area calculations, numerous bug fixes, and more
robust NURBS evaluation.  Following BRL-CAD's interface deprecation
policy (see CHANGES file), the Jove text editor is no longer being
bundled.  Numerous converters receive robustness improvements
including the STEP, Patch, and 3DM importers.

* improved gqa performance on parallel SMP hardware - Richard Weiss
* fixed bounding box size calculation for pipe geometry - Bob Parker
* improved help option consistency across numerous tools - Carl Moore
* 'idents' command no longer reports negative booleans - Keith Bowman
* improved support for NURBS with big uv-domain changes - Keith Bowman
* improved ray tracing behavior for grazing rays - Keith Bowman
* improved robustness of the step-g geometry importer - Nick Reed
* fixed search command bombing on v4 database file - Sean Morrison
* fixed graphics window z-clipping bug in mged - Bob Parker
* fixed mged lesson 15 toy truck 'inside' ordering bug - Sean Morrison
* fixed uninstallable Linux RPM package on Fedora 18 - Jordi Sayol
* improved Mac, BSD, & Windows ray tracing performance - Sean Morrison
* improved Linux ray tracing via cpu thread affinity - Akshay Kashyap
* fixed nirt high object count failure on Windows - Richard Weiss
* added plate mode BoT support to 'bot_merge' command - Richard Weiss
* jove removed, see jove.emacs for compatibility bindings - Cliff Yapp
* added gqa -q quiet option to suppress 'was not hit' - Richard Weiss
* level-of-detail mged configuration dialog, under Tools - Nick Reed
* added level-of-detail wireframe support to mged/archer - Nick Reed
* initial NURBS shaded display and tessellation support - Keith Bowman
* fixed patch-g -f input file permissions failure - Sean Morrison
* improved large file support for the patch-g importer - Sean Morrison
* upgraded libpng to version 1.5.12 - Cliff Yapp
* openNURBS updated to version 5.0 (2012-10-24) - Richard Weiss
* improved BoT mesh editing interface in archer - Bob Parker
* fixed crash when running screengrab in archer - Nick Reed
* fixed memory leak when working with pipe primitives - Daniel Roßberg
* fixed asc2g and mged empty revolve object crashes - Sean Morrison
* improved Linux support for multiple hardware displays - Bob Parker
* fixed crash when parsing invalid shader parameters - Cliff Yapp
* fixed mged 'dbupgrade' -permissions error on windows - Sean Morrison
* fixed infinite loop raytracing subtracted lights - Sean Morrison
* added hyp centroid and volume output to 'analyze' - Aaron Keesing
* added support for wireframe drawing of 'hyp' labels - Bob Parker
* fixed random number SMP bug affecting rt and adrt - Sean Morrison
* added support for editing 2D sketch objects in archer - Bob Parker
* fixed File->New deprecation error in archer - Sean Morrison
* improved Linux platform application and file icons - Jordi Sayol
* modified gqa to report all missed regions - Richard Weiss
* added epa surface area and volume to analyze command - Chris Dueck
* added arbn surface area and volume to analyze command  - Chris Dueck
* added eto surface area and volume to analyze command  - Chris Dueck
* quell pix-png gAMA chunk warning defaulting to unset - Sean Morrison
* fixed mged interactive object translation keypoint bug - Bob Parker
* fixed corrupted tessellation pipe export bug - Richard Weiss
* fixed memory leak in bot_condense - Chris Dueck
* output from g-var no longer prints 'fwrite' messages - Sean Morrison
* fixed gqa to not report overlap regions as zero hits - Richard Weiss
* fixed crash in step-g tool importing AP214 entities - Sean Morrison
* improved 3dm-g output and invalid geometry support - Sean Morrison
* fixed crash revolving empty sketch objects - Sean Morrison
* fixed TIE raytracing bugs shotlining plate-mode BoTs - Sean Morrison
* g_diff gives non-zero return code if .g files differ - Sean Morrison
* fixed typographical errors in numerous tools and docs - Carl Moore
* fixed TIE perpendicular face mesh evaluation failure - Richard Weiss
* added -b option to set tpkg network packet size - Andrei Popescu
* added manual page for existing mged reid command - Richard Weiss
* added manual page for bot_sync, bot_flip, bot_split - Richard Weiss
* added manual page for running rtarea within mged - Richard Weiss
* improved documentation consistency and authorship info - Tom Browder
* new mouse-input unpushed matrix edit option in archer - Bob Parker
* fixed bug during pipe editing with working units set - Bob Parker
* added experimental 'bot_fuse' command to heal BoTs - Richard Weiss

BRL-CAD 7.22.0

19 Mar 18:51
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SECOND REVISION: The first posting of the 7.22.0 release of BRL-CAD
for Mac OS X included dependencies to a non-default library causing
MGED to fail to start properly.  This second post fixes that issue.

This is the debut release of BRL-CAD for Mac OS X providing an
improved drag-n-drop installation.  The graphical application launched
by default is BRL-CAD's "mged" geometry editor.  However, also
included within the application bundle is a complete installation of
BRL-CAD's 400+ other command-line applications.  They are located in
the Contents/Resources/brlcad subdirectory of the application bundle.

----------------------------------------------------------------------
--- 2012-06-25  Release 7.22.0                                     ---
----------------------------------------------------------------------

After many months of development, this release includes hundreds of
fixes for source code defects, logic and memory management bugs,
potential security vulnerabilities, and numerous other issues reported
by Coverity Static Analysis.  While having participated in the
Coverity Scan Initiative since inception in 2006, this release marks a
completion milestone with the review and resolution of all reported
issues, more than 2100 overall.  Every defect was inspected, code
modifications were peer-reviewed, critical features were tested, and
user-visible changes were documented.  Along with other on-going
improvement efforts such as treating all compiler-generated warnings
as errors, time and attention continues to be put forth towards
improving BRL-CAD's maintainability and source code quality.

Development of BREP/NURBS representation support within BRL-CAD
continues to mature with this release including ray tracing
improvements, tighter bounding boxes for better performance, progress
converting from traditional implicit+CSG representations to NURBS+CSG,
wireframe improvements, and a thorough verification and validation
(V&V) review for analysis suitability.  The V&V review compared
BRL-CAD's primitives in implicit, polygonal mesh, and NURBS form
evaluating more than a dozen separate tests looking for differences in
rendering, curvature, presented areas, volume, and more.  The review
identified a couple minor issues that were inspected and fixed but
successfully demonstrated the viability of using our BREP/NURBS
implementation for geometric representation and analysis purposes.

This release introduces numerous major feature developments including
the initial implementation of a new physics simulation capability, a
new ambient occlusion rendering mode, and the integration of rtwizard
into Archer.  The simulation system was developed by Abhijit Nandy
under the European Space Agency's 2011 Summer of Code in Space (SOCIS)
program; and it allows BRL-CAD geometry objects to dynamically
interact with each other (e.g., collision detection, friction) or with
the environment (e.g., gravity).  Ambient occlusion is a shading
method that helps add considerable realism and feature definition to
renderings, enabled within rt using the "set ambSamples=128" command.
The rtwizard rendering interface was extended to work as a
command-line tool (useful for scripting) and was integrated within
Archer as the underlying rendering interface.

Conversion support continues to be a development priority with
significant importer enhancements for the STEP, OBJ, COMGEOM, FASTGEN,
and RAW file formats.  The STEP importer in particular receives
several updates, support for importing assembly hierarchies, and is in
the process of being fully ported to Windows.  This release also fixes
more than 40 user-visible bugs including a significant database
corruption issue.  A database corruption issue was discovered and
fixed affecting 64-bit big endian platforms (e.g., IBM Power Series
supercomputers) when writing out ebm, dsp, vol, and hf primitives.

BRL-CAD's documentation continues to be extended, improved, and
translated due to the sustained efforts of several contributors.
Manual page documentation is now available on Windows through the
'brlman' command and within MGED.  Several utilities and commands that
previously had no documentation now have manual pages; many others
received corrections and improvements.  The introductory article
"About BRL-CAD" is now available in Russian, Italian, and Armenian.

* numerous manual page corrections and improvements - Tom Browder
* integration of rtwizard traits into archer - Bob Parker, Cliff Yapp
* new asc2dsp prep tool for displacement map data files - Tom Browder
* fixed a problem with rt writing pix files on Windows - Bob Parker
* added new raw-g raw triangle mesh to BoT importer - Daniel Roßberg
* added Windows man page support (using html) to brlman - Cliff Yapp
* added support for section numbers to brlman script - Cliff Yapp
* new manual pages for asc2dsp, dsp, asc2pix, and asc2g - Tom Browder
* fixed bug creating binary uniform (binunif) objects - Sean Morrison
* fixed memory corruption bug reading v4 geometry - Sean Morrison
* fixed bug where small raytraces were being rotated - Erik Greenwald
* ios-icon.sh script added for generating IOS icons - Erik Greenwald
* support for implicit to boundary representation geometry conversion
        - Cliff Yapp, Wu Jianbang, Sean Morrison
* added rtwizard support for writing out .png images
        - Bob Parker, Cliff Yapp, Richard Weiss
* fixed region demotion bug in the mged 'red' command - Richard Weiss
* added implicit conversion support to 'brep' command - Wu Jianbang
* improved NURBS raytracing grazing hit & edge behavior - Keith Bowman
* added initial documentation for make_pnts command - Richard Weiss
* fixed gqa crash when specified objects didn't exist - Richard Weiss
* rtedge and rtwizard support multiple occlusion objects - Bob Parker
* fixed mged matrix edit bug selecting the last matrix - Bob Parker
* added 'lc' command to mged for listing region codes - Richard Weiss
* fixed rtedge/rtwizard edge overlay rendering bug - Bob Parker
* fixed 'open: Permission denied' rtedge output file bug - Cliff Yapp
* upgraded libpng to 1.5.10 - Cliff Yapp
* fixed various memory leaks in the comgeom-g geometry importer
        - Tom Browder, Nick Reed
* fixed comgeom-g bug importing ars primitive objects - Tom Browder
* added new command-line invocation support to rtwizard - Cliff Yapp
* fixed BoT mesh hit offset and vanish TIE render bugs - Keith Bowman
* improved nurbs raytracing when shooting from inside - Keith Bowman
* added 'draw'/'e' -m1 option for shading BoTs in mged - Richard Weiss
* expanded docs on mged listeval and 'l' list commands - Richard Weiss
* removed obsolete 'syn' multi sine synthesis tool - Sean Morrison
* fixed memory corruption in vegetation generator tool - Sean Morrison
* fixed ARS bounding box size affecting overlap handling - Cliff Yapp
* fixed bug in fast4-g importer handling HOLE/WALL cards - Nick Reed
* fixed field truncation bug in comgeom-g importer - Tom Browder
* fixed log file clobber bug in the benchmark suite - Cliff Yapp
* enabled new 'select' command for use within mged - Richard Weiss
* added preliminary object 'select' command to archer - Bob Parker
* improved support for the Intel C/C++ compiler (icc) - Sean Morrison
* now sorting top level object alphabetically in rtwizard - Cliff Yapp
* "About BRL-CAD" article translation to Russian - Ilya
* "About BRL-CAD" article translation to Armenian - Karen Mgebrova
* "About BRL-CAD" article translation to Italian
        - Unknown Contributor, Tom Browder
* improved 'adjust' command rgb/color attribute handling - Cliff Yapp
* added initial support for step-g import of assemblies - Keith Bowman
* added a basic SWIG spec file - Erik Greenwald
* fixed referenced object highlighting in archer treeview - Bob Parker
* fixed error handling input reading failure in burst - Sean Morrison
* fixed memory double-freeing issue in shp-g - Erik Greenwald
* added optional scaling parameter to autoview command - Sean Morrison
* fixed extrude object bug rendering at near right angles - Bob Parker
* added -h option to nirt to suppress header printing - Cliff Yapp
* fixed nirt attribute reporting for specified attributes - Cliff Yapp
* fixed ebm/dsp/vol/hf corruption on 64-bit big endian - Sean Morrison
* fixed step-g importer memory management issues - Keith Bowman
* improved tab-completion behavior for mged and archer - Sean Morrison
* fixed pervasive string handling memory leak - Tom Browder
* improved table output formatting for 'analyze' command - Tom Browder
* improved rtweight portability and density file parsing - Tom Browder
* fixed crash in anim_cascade animation tool - Nick Reed
* fixed bug in gif2fb processing non-interlaced images - Sean Morrison
* fixed crash in coil when using -S and -l options - Cliff Yapp
* fixed mged 'make_pnts' command resource contention bug - Nick Reed
* fixed nirt memory leak and scriptfile off-by-one bug - Sean Morrison
* d2-c now handles the imaginary part correctly - Erik Greenwald
* fixed raytracer crash if output file creation fails - Erik Greenwald
* restored mged BoT editing interface functionality - Tom Browder
* fixed mged 'solids' and 'regions' command crashes - Tom Browder
* fixed orientation bug in mged 'ypr' rotation command - Nick Reed
* fixed mged bug setting color via Combination Editor - Nicholas Reed
* fixed numerous xyz/ypr orientation bugs in anim tools - Nick Reed
* improved tessellation of pipe bends for conversion - Richard Weiss
* fixed keypoint vertex bug when editing extrude objects - Nick Reed
* fixed eto error converting hyp objects with asc2g tool - Nick Reed
* fixed mged bug processing edcodes command arguments - Bob Parker
* various improvements to NMG polygonal mesh processing robustness
        - Nick Reed, Sean Morrison, Richard Weiss
* improved bad f...
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BRL-CAD 7.20.6

19 Mar 19:01
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Note:  There are several bugfix patches to the 7.20.6 release - if 
building from source, apply all patches in order as follows:

(download brlcad-7.20.6.tar.gz and all files with a .patch extension) 
tar -xvzf brlcad-7.20.6.tar.gz 
cd brlcad-7.20.6 
patch -p0 < ../patchfile-1.patch
patch -p0 < ../patchfile-2.patch
etc.

----------------------------------------------------------------------
--- 2012-04-30  Release 7.20.6                                     ---
----------------------------------------------------------------------

* fixed type F picture generation with rtwizard - Bob Parker
* Improvements to NURBS raytracing - Keith Bowman 
* Updated libpng to version 1.5.10 - Cliff Yapp
* Added MUVEStoORCA matrix support to librtserver - Jim Hunt
* fixed BOT raytracing mistakes when using TIE - Keith Bowman
* fixed ARS bounding box size affecting overlap handling - Cliff Yapp
* fixed raytracing crash in 64 bit Windows - Cliff Yapp
* fixed MGED's manual page viewer on 64 bit Windows - Cliff Yapp
* fixed intermittent segmentation fault in MGED - Richard Weiss
* now sorting top level object alphabetically in rtwizard - Cliff Yapp
* improved handling of rgb/color attributes by adjust cmd - Cliff Yapp
* fixed referenced object highlighting in archer treeview - Bob Parker
* added optional scaling parameter to autoview command - Sean Morrison
* fixed extrude object bug rendering at near right angles - Bob Parker
* added -h option to nirt to suppress header printing - Cliff Yapp
* fixed nirt attribute reporting for specified attributes - Cliff Yapp
* fixed ebm/dsp/vol/hf corruption on 64-bit big endian - Sean Morrison
* improved tab-completion behavior for mged and archer - Sean Morrison
* improved table output formatting for 'analyze' command - Tom Browder
* modified rtweight to handle incorrect lines - Tom Browder
* fixed crash in coil when using -S and -l options - Cliff Yapp
* d2-c now handles the imaginary part correctly - Erik Greenwald
* handle path-containing spaces in animation commands - Sean Morrision
* fix rt crash with ambSlow=1 option - Sean Morrision
* fixed pipe crash during tessellation - Sean Morrision
* fixed crash adding extrusion with null sketch name - Bob Parker
* fixed crash during rt -c "ae 35 25" view change - Bob Parker
* fixed mged bug setting color via Combination Editor - Nicholas Reed
* reid command now reports the highest region ID set - Carl Moore
* batch script shortcuts now set PATH on Windows - Sean Morrison
* fixed attribute handling bug affecting v4 geometry - Daniel Rossberg
* fixed g-obj error when exporting facets - Christopher Pitts

BRL-CAD 7.20.4

19 Mar 18:54
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----------------------------------------------------------------------
--- 2011-10-30  Release 7.20.4                                     ---
----------------------------------------------------------------------

* added lighting model visualization options for archer - Bob Parker
* reid command now takes optional -n "incr by" value - Erik Greenwald
* reid command now returns the last region ID set - Erik Greenwald
* improved nirt support for non-UNIX-style text files - Sean Morrison
* added new relos thickness reassignment command to mged - Carl Moore
* support for loading archer plugins with spaces in name - Bob Parker
* added 'exists' object detection command to mged/archer - Cliff Yapp
* added archer BoT split/flip/sync surface cleanup panel - Bob Parker
* added new g-dot exporter for hierarchy visualization - Sean Morrison
* improved g-vrml successful exporting and reporting - Richard Weiss
* added -b BoT dump and -e evaluation option to g-vrml - Richard Weiss
* improved obj-g polygonal import - Nicholas Reed, Richard Weiss
* fixed mged crash after killing an illuminated object - Abhijit Nandy
* tightened default polygonal mesh export tolerance - Sean Morrison
* converted introductory Tcl/Tk presentation to Docbook - Tom Browder
* initial support in archer for editing pipe primitives - Bob Parker
* fixed NURBS raytracing crash due to invalid geometry - Sean Morrison
* fixed memory leak when saving BoT geometry - Nicholas Reed
* improved mged object name globbing support - Sean Morrison
* improved bounding box for rpc, epa, ehy, hyp primitives - Cliff Yapp
* improved handling of degenerate face facetization - Richard Weiss
* add support for .png file output in rtwizard - Cliff Yapp
* improved rtwizard's invocation of rt - Cliff Yapp
* added object path and keep options to conversion.sh - Tom Browder
* 'keep' command includes sketch when keeping revolve - Sean Morrison
* fixed mged 'mater' command inheritance setting bug - Richard Weiss
* fixed mged crash removing comb members during edit - Richard Weiss
* modified archer startup to not require html documentation files
        - Cliff Yapp, Brandon Hinesley
* improved mged/archer/bwish run-time path behavior on Windows
        - Cliff Yapp, Bob Parker
* upgraded libpng to version 1.5.4 - Cliff Yapp
* improved performance of step-g importer - Zach Easterbrook
* fixed browsing mged html help pages on Windows - Bob Parker
* restored mged 'rt' command output to console window - Sean Morrison
* fixed infinite loop bug plotting NURBS wireframes - Sean Morrison
* added new 'ringworld' procedural geometry generator - Erik Greenwald
* fixed mged Manual page item in help menu - Brandon Hinesley

BRL-CAD 7.20.2

19 Mar 19:03
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There were some "late-breaking" fixes to this release not present in
the tarball - if building from source, apply the patch file as follows
(using the .gz file as an example):

(download brlcad-7.20.2.tar.gz and rel-7-20-2-r2.patch)
tar -xvzf brlcad-7.20.2.tar.gz
cd brlcad-7.20.2
patch -p0 < ../rel-7-20-2-r2.patch

----------------------------------------------------------------------
--- 2011-07-01  Release 7.20.2                                     ---
----------------------------------------------------------------------

* improved fusing of coplanar faces (tessellation) - Richard Weiss
* fixed rtwizard issues with unknown units and freezing - Bob Parker
* fixed problem with mater command setting color - Cliff Yapp
* fixed crash rendering scenes with all invalid lights - Sean Morrison
* improved reliability of ARS tessellation/conversion - Richard Weiss
* improved tessellation performance and reliability - Richard Weiss
* replaced 'erase_all' command with 'erase -r' - Brandon Hinesley
* improved 'ls' command error reporting in archer - Brandon Hinesley
* fixed related object highlighting in archer's tree view - Cliff Yapp
* added closedb command to archer - Brandon Hinesley
* improved behavior of opendb command in archer - Brandon Hinesley
* improved archer/mged manual page browser behavior - Brandon Hinesley
* added man documentation command to archer - Brandon Hinesley
* improved File->New dialog in mged - Brandon Hinesley
* all cmake files now included in dist - Erik Greenwald, Sean Morrison