--- ray/doc/notes/ReleaseNotes 2004/09/23 18:00:54 1.49 +++ ray/doc/notes/ReleaseNotes 2015/08/12 23:07:59 1.267 @@ -1140,7 +1140,7 @@ of recursive routines using sets to avoid overrunning the stack limit. ============================== -Version 3.6 +Version 3.6 (Released 10/21/04) Modified 4-byte RGBE encoding routine to avoid problems when one or two primary values is negative and the other(s) @@ -1256,7 +1256,7 @@ Added -I option to replmarks for mesh instancing. Made similar change for virtual sources to allow modifiers and aliases on the mirror and prism types to work properly. -Rob Guglielmetti dded -lw and -lh options to falsecolor to control the +Rob Guglielmetti added -lw and -lh options to falsecolor to control the legend dimensions. Made it so -lw 0 and/or -lh 0 turns legend off. Made it so pcompos will read everything from a stream even if it doesn't @@ -1296,7 +1296,7 @@ Fixed a very obscure bug in rpict that caused a dark h line in certain cylindrical projections due to improper drawing of the sky dome source in rt/srcdraw.c. -Fixed problems with effective ray lenths computed for dielectric +Fixed problems with effective ray lengths computed for dielectric and BRTDfunc materials. This was most evident in breakup of holodeck views when VDISTANCE=True. @@ -1330,3 +1330,724 @@ the details of his discovery. Enabled the -p option for primary conversion without tone-mapping in ra_bmp. Also provides for XYZE input conversion to RGB. + +Fixed what I consider a bug in pvalue -o when taking XYZE files on input, +where it was inappropriately undoing the exposure value so that it always +reported radiance rather than XYZ values with Y in cd/m^2. + +Made it so ra_bmp only produces run-length encoded 8-bit output for +grayscale images that are tone-mapped. This minimizes circumstances +under which output scanline order is reversed. + +Fixed bug in rcalc where it sometimes wasn't parsing the input format +correctly. + +===================== +Version 3.7 (Released 7/25/05) + +Fixed bug in source occluder cache which caused consistency error +for distant sources and mist materials. (Thanks to Mark Stock for +finding the problem.) + +Fixed serious bug in source drawing routines for rpict, where the edges +of light sources were appearing through obstructions. (Thanks to Veronica +Sundstedt for pointing this out.) + +(The above were included in the 3.6.1 patch release.) + +Changed default temporary directory from /usr/tmp, which doesn't exist +on a lot of systems these days, to /tmp. + +Eliminated many unused files and programs from the distribution, including +the following programs that were being built but no longer used: + oki20 - printer driver for OkiMate 20 printer (B&W) + oki20c - printer driver for OkiMate 20 color printer + pcwarp - intended as more general substitute for macbetcal, + but never quite worked + ra_avs - convert to & from AVS image format + ra_bn - convert to & from Barneyscann format + ra_pr - convert to & from 8-bit Sun rasterfile format + ra_pr24 - convert to & from 24-bit Sun rasterfile format + thf2rad - convert GDS "things file" to Radiance scene format +If anyone is still wanting any of the above programs, let us know and we'll +reinstate it. + +Fixed bug in pcond's acuity simulation for small view angles (less than +4 degrees horizontally or vertically). Thanks to James Lee for figuring +this out. + +Added script to convert to/from ICT's Poskanzer Float Map, which I don't +care to support officially due to its machine-dependent byte order. + +Fixed bug that caused incorrect reporting of non-surface in set when +mixing meshes and instances. (Thanks to Jack de Valpine for discovery.) + +Fixed inaccuracy in calculation of diffuse transmission in the presence +of pure specular (Fresnel reflection) using "trans" material. Thanks +to Christoph Reinhart for pointing out the error. + +Made internal change to tone-mapping library to use structure pointer +rather than stack, making code re-entrant and more up to modern standards. + +Added -pd option to handle depth-of-field blur in rpict. This requires +that the view directon (-vd option) include focal distance information, +which is now preserved by the various view file routines, and reported +by the vwright command. + +Added DBLUR variable to ranimate and pmdblur script to handle simultaneous +motion and depth-of-field blurring. Thanks to Visarc for funding this work. + +Added setting of focus distance in rvu ("focus" command) and rholo +('f'/"frame" command). + +Changed default remote shell in ranimate to "ssh" rather than "rsh", +which has been abandoned on most Unix systems due to security issues. + +Fixed behavior of source primitive using illum with no alternate +material. These now become transparent so one can see the sky or +light-probe background for use in image-based lighting. Previously, +the user needed to specify the background glow as the alternate +material for a distant illum source to behave properly. (This still +works.) + +Fixed some minor problems and inconsistencies with 16-bit/channel +TIFF i/o in ra_tiff. + +Created mksource program to generate distant sources for improved +image-based lighting with light probes. + +Changed ambient calculation so that -ad will not limit recursion +depth, and a minimum of 27 samples will be sent out for each stored +ambient value, or 3 samples if -aa is 0 (caching off). + +Added -oM option to rtrace to report material (rather than modifier) +for cases where actual material is aliased or further up modifier chain. + +Rearranged the way ray contributions are computed so that it might be +possible to use rtrace to derive daylight coefficients and optical +transfer functions. The new -oTW option of rtrace produces color +contribution weights for each ray, which combined with the -ti (or -tI) +option permits the contribution of selected surfaces or sources to +be determined. Using the -oTW option, one should also specify +options "-dt 0 -aa 0 -as 0" for optimal results. In particular, +one cannot expect reasonable tallies with -ab >= 1 and irradiance +caching on (-aa > 0). + +The same code modifications included a change to the indirect computation +with caching switched off (-aa 0). Whereas before, the number of secondary +rays after the first bounce were half of the previous generation, they are +now determined by the surface reflectance, making for a better and faster +calculation. It should now be possible to compute many bounces with -aa 0, +which used to be prohibitively expensive. + +Added -T option to xshowtrace to trace rays to light sources. + +Added meta2bmp program to produce BMP files from metafile graphics. + +Added cct_x(t) and cct_y(t) to src/cal/cal/blackbody.cal to interpolate +CIE chromaticities for particular black-body temperatures. + +Increased maximum number of input pictures in pcomb and pcompos to 512. + +Created rtcontrib program for computing ray contribution coefficients. +This tool may be used to do standard optical ray tracing or daylight +coefficient calculations for annual simulations, among other uses. + +Added tilde ('~') output option as part of the -o* specification of +rtrace. This permits ray trees to be parsed more easily in binary +output mode, as needed by rtcontrib. + +Implemented Russian roulette ray termination with -lr <= 0. +Made -lr -10 the default in rtcontrib. + +Made rtcontrib -f option search RAYPATH directories. + +Made it so -o option of rtcontrib can pipe -o output to a command. + +Added -if and -of options to total for binary i/o (following rcalc mold). + +Switched default options in rtrace to use Russian roulette. (Rpict and rvu +still use biased ray termination.) + +Added rtcontrib -r option to recover partial output. + +Added -u rendering option for pure Monte Carlo sampling. +(Got rid of -DMC compile option, which this makes superfluous.) + +Changed -t option of rlam to accept strings as well as single characters. + +Fixed bug in rcalc with -l option where it would sometimes go into an +infinite loop. + +Fixed truly ancient bug in bounding box computation for cones, which +could (and did) cause missing segments. + +Added -z option to normtiff to output LZW-compressed files. + +Last change to total causes it to produce results when it sees an empty +line on the input. This was not intentional, but I decided I like this +behavior so I documented it rather than changing it. + +===================== +Version 3.8 (Released 10/17/06) + +Fixed Russian roulette ray termination, which was doing the opposite of +what it should have been doing, resulting in overestimated values below +minimum ray sampling weight (serious). + +Changed mksource to use 98th percentile (rather than 99th) for threshold. + +(Above changes included in 3.7.1 patch release.) + +Eliminated writing of EXPOSURE= line in ra_tiff -r when source TIFF +does not have STONITS set. + +Fixed bug in ambient calculation that caused black values for multiple +bounces in some scenes. Thanks to Mark Stock for creating and sharing +the sophisticated test scene that demonstrated this problem. + +Fixed bug in antimatter using Russian Roulette sampling. + +(Above changes included in 3.7.2 patch release 22 Aug 2005.) + +Created fieldcomb script to combine alternate fields in a rendering +sequence. (Development generously sponsored by Iebele Abel.) + +Added missing preload of mesh objects for more efficient memory use +during parallel rendering -- this was a serious oversight. + +Created ran2tiff program to automate exposure setting of animation +sequences using a moving histogram in combination with pcond, and +converting frames to TIFF. + +Eliminated SPEED macro from makeall and source tree. + +Added -pj option to vwrays to allow jittering of sample locations. + +Fixed bug in rtcontrib where it occasionally missed writing the +final bin file. (Pretty serious, actually.) + +Added -Dfseeko=fseek to MACH= line for linux, as fseeko(3) seems to be +broken in current versions of Linux. (Need to remove this later.) + +Rearranged struct's for better efficiency on 64-bit architectures. + +Added -i option to rlam so it works with binary input formats. + +Added rtcontrib -bn option to specify number of bins and fixed bug +in recovery of files containing multiple values per record. + +Added rtcontrib -fo option to write over existing files, which it now +refuses to do without this option. + +Made rtcontrib flush output when handed a zero-length ray vector, +to match behavior of rtrace. + +Improved color scale for falsecolor output. + +Added threshold test for Fresnel approximation to prevent its use +on smooth surfaces with unrealistically low specularities (less than 1.8%). +Water has a specular reflectance of 2.1% at room temperture. + +Removed NICE macro settings in rpict and rtrace, which was slowing down +the processes under Mac OS X (10.4) by about 60% due to processor napping. + +Made xform, replmarks and rad2mgf handle quoted modifiers and names properly. + +Fixed problem in genblinds, where it was generating slats that were too +wide with the +/-r option. (Thanks to Helena Buelow-Huebe for discovering +this bug.) + +Fixed bug in ra_ppm for 16-bit/sample i/o, where it was getting the byte +order wrong (apparently). + +Added -V option to rtcontrib to report actual contributions, rather than +just ray coefficients. + +Fixed bug in ranimate that caused it to fail in continuation of renderings. + +Renamed librt.a to librtrad.a, to avoid conflict on Solaris. Almost +everything now gets linked to -lrtrad instead of -lrt. + +Fixed problem with large sample sets, so -u+ option now is truly random. +Thanks to Rick Mistrick and Younju Yoon for identifying this problem, +which was related to a poorly designed hash function. + +Changed -u+ to be the default setting in rtrace (only). + +Fixed binary i/o for rlam and vwrays under Windows. + +Added tmCvLums() to tone-mapping routines using a 16-bit lookup table +on IEEE floats, which is also used to improve speed of COLOR conversions, +especially on machines with slow log() calls. The first call to +tmCvLums(), tmCvGrays(), or tmCvColors() initializes the table. + +Created optics2rad.csh script to convert from Optics 5 material output +to something correct for Radiance. Built on old glazing.cal function, +which is actually incorrect so removed from the distribution. + +Fixed nuisance bug in ximage under some SGI machines that caused it to +choose an inappropriate visual and display incorrect colors. (Thanks +to Oskar Itzinger for debugging the problem.) + +Fixed long-standing inaccuracy of pcompos -t and +t thresholding options. + +Fixed bug in handling of views with tabs rather than spaces. + +Fixed bug related to alias of alias. + +****** COMPATIBILITY CHANGE ******** +Changed default sky turbidity in gensky from the original default of +2.75 to the CIE 110-1994 standard value of 2.45. Thanks to Marilyne +Anderson of MIT for pointing out this discrepancy. + +Added -o option to ra_xyze to produce original pixel values. + +Fixed bug in tracing of virtual sources, where intervening glazing was +not being accounted for properly. + +Added -h option to pcompos and pcomb to eliminate verbose headers. + +===================== +Version 3.9 (Released 3/30/08) + +Added -spec option to falsecolor to restore original spectral color scale. +Also added "-s auto" option to automatically set the maximum value. + +Added byte-swapping input and output to rcalc. + +Additional error-checking for source surfaces. + +Re-fixed bug in octree code that caused it to allocate 8 times as +much memory as it actually used(!) -- this was pointed out way back +in 1999 by Erik Reinhard and Erik Jansen, but the fix they gave me +got lost in the slightly broken release process at the time. This +should make a big difference in memory usage, especially for the +new mesh primitive. (I measured 30% less memory usage.) + +Corrected ray weights for material mixtures. + +Reduced the default -n setting for obj2mesh to take better advantage +of the smaller octree structure size. + +Fixed bug in shadow cache where it was adding surfaces with antimatter +holes cut in them to the obstructor list. Thanks to John Mardaljevic +for discovering and reporting the problem. + +Adding ability in mkillum to incorporate BSDF data in calculation. +Internal interface (raypcalls) now used in place of rtrace process(es). + +Fixed pixel alignment in pcomb for size reduction and enlargement. + +Allow rtcontrib user to set -P and -PP options for persistent rendering. +The only caveat is that -n setting > 1 requires -PP rather than -P. + +Added -c option to rtcontrib to facilitate cumulative calculations. + +****** COMPATIBILITY CHANGE ******** +Fixed long-standing bug in source.cal, which caused it to produce +reversed anisotropic photometric distributions due to the +misorientation of the y-axis. Thanks to Zack Rogers for discovering +and helping debug this problem. + +Fixed long-standing bug in replmarks, where triangles with X-side +aligned with Z-axis would cause incorrect rotations. Thanks to +Zack Rogers for finding this error. + +Added rsensor program to compute sensor signal for daylighting controls. +Funding for this component was provided by the Architectural Energy +Corporation in Boulder, CO, and directed by Zack Rogers. + +Added "planisphere" (stereographic) fisheye view type for traditional +daylighting analysis. Feature requested & explained by Axel Jacobs. + +Modified -c option to rtcontrib so it can take a number of input +rays to average over, rather than only produce a single accumulated +record (which can now be done with -c 0). + +===================== +Version 4.0 (Released 3/12/10) + +Added -n option to rvu to provide parallel rendering. + +****** COMPATIBILITY CHANGE ******** +Changed ".pic" extension to ".hdr" in all sources and documentation +to improve interoperability with other software, since this has become +the de facto extension for Radiance RGBE and XYZE pictures. Since file +extensions were never more than a convention in Radiance, this does not +affect operation, but may require the update of scripts, etc. written +by others that assume the ".pic" suffix for Radiance output. + +Added -N option to objview to support multiprocessing. + +Improved sampling of circular sources (source, sphere, ring types) with +quite a bit of help from David Geisler-Moroder. + +Added "rpict" and "rvu" variables to rad, and made these as well as +the "oconv", "mkillum" and "pfilt" variables accept an alternate +command path in each case. Change suggested by Lars Grobe based +on similar Radzilla (radz) facility by Carsten Bauer. + +Fixed rad -v N specification to use actual view name if one. + +Fixed error in mkillum calculation where it neglected indirect +source contributions from BTDF illum's. + +Added GMT and LATLONG header lines for Greenwich Mean Time and +degrees North Latitude / East Longitude. + +Added gendaylit to distribution (finally). + +Added ability in vwright(1) to get view from command line arguments. + +Created genklemsamp(1) utility to generate samples suitable for +BSDF-based annual calculations. This is the first Perl script to +be added to Radiance. Hopefully, others will follow. + +Added klems_int.cal file to compute Klems bins for windows. + +Created genskyvec utility to sample a particular sky and +evaluate average radiance over the standard Tregenza sky patches. + +Created dctimestep program to compute a set of sensor values or +a combined image for a particular time using the daylight +coefficient method. + +Created src/rt/rayfifo.c for first-in/first-out handling of +multiprocessing by raypcalls.c. + +Added -n option to rtrace for executing on multiple cores +using new rayfifo calls. + +===================== +Version 4.1 (Released 11/04/2011) + +Changed ranimate behavior so remote login under a different user +doesn't necessarily require the presence of the originating user's +home directory. + +Changed standard transmission function normalization back to what +it was in version 3.5, following recommendation of David Geisler-Moroder, +who pointed out that the revised BTDF increased too much at grazing. + +Changed rad behavior with -N >1 on single view to call rpiece. + +Updated SCons build system for MINGW compilation, thanks to Christian +Kohler. + +Added -u option to rlam for unbuffered output. + +Modified dctimestep to accept sky vector and daylight coefficient matrix +or list of images to sum together, as suggested by Andy McNeil. + +Created genBSDF script to generate BSDF in Windows XML format. + +Modified mkillum to accept detailed geometry from BSDF XML files. + +Altered obj2rad to ignore zero normals (thanks to Jack de Valpine for +suggestions and help). + +Fixed bug in genklemsamp that caused non-uniform sampling over surfaces. + +Fixed bugs in rhoptimize and rhcopy for 64-bit compilation. + +Made a change to avoid problem using gcc --fast-math compile option. + +****** COMPATIBILITY CHANGE ******** +Changed behavior of rtrace and rtcontrib so that every scanline is +not flushed when both -x and -y are set. This avoids flush delays +in rtcontrib for large numbers of output files and delays while +rendering images using rtrace with the -n option. + +Added ability for rsensor to output ray origins and directions +rather than actually loading octree and computing sensor value. + +Fixed old bug in obj2rad where it would stop processing and +report a syntax error if the "void" type is used in the map file. + +Updated reflection model according to EGSR 2010 paper by David +Geisler-Moroder and Arne Duer. + +Replaced C-shell version of falsecolor with Perl script written +by Axel Jacobs. + +****** COMPATIBILITY CHANGE ******** +Changed -sj (specular jitter) option to something called specular +sampling (-ss), which if set less than 1 has the same behavior as +the old -sj, but when set greater than 1, spawns multiple ray +samples from semi-specular surfaces. + +Fixed bug noticed by Randolph Fritz that caused ambient sync errors. + +Fixed bug in findglare for reading picture files under Windows. + +Added options to pvalue to note other color spaces on reverse conversion. +Thanks to Erich Philips for the feature request. + +Added BSDF data-driven material type with full sampling support. + +Added BRDF calculations to genBSDF. + +Bug fixes in rsensor thanks to help from David Geisler-Moroder. + +Added variable-resolution BSDF support in renderers and genBSDF. + +Created pkgBSDF program to extract BSDF geometry and put it +together with surface description suitable for inclusion in +a Radiance scene. + +Muted warning for "no light sources found" when there is at least +one glow object and interreflections are on (-ab > 0). + +Fixed long-standing bug that caused underestimation of reflection +when specular component was below -st threshold in non-metals. + +Checked in cross-platform cmake build system created by Bill Hoffman +of KitWare and sponsored by NREL. This includes a qt-based +driver for rvu, which is built in the new subdirectory src/qtrvu. + +===================== +Version 4.2 (Release date 7/31/2014) + +Axel Jacobs added -cp and -palettes options to falsecolor. + +Fixed bug in matrix output of genBSDF introduced shortly before 4.1 release. + +Made rvu more responsive in multi-processing mode when changing parameters. +Explicit "new" command not needed to show changes, because it goes back +to "immediate mode" once something is changed. Processing will be slow +but response time quick until next "new" command. + +Fixed major bug in transmitting proxy material sampling. + +Patched cmake build tools (changes by Zack Galbreath). + +Removed requirement for pflip -h to be given input file (can pipe from stdin). + +Added "Number of processes" slider to trad "Action" pane to control rad -N +option for rvu and batch rendering. + +Added -c option to vwrays to repeat pixels for rtcontrib. + +Reworked rtcontrib program and renamed to rcontrib. New version runs much +faster, especially on multiprocessor systems, and doesn't require as much +memory. No longer calls rtrace; instead does all the work itself. + +Added -d option to genskyvec to produce direct-only (sun no sky) vector. + +Added Ashikhmin-Shirley anisotropic BRDF model (ashik2) with help +from Nicolas Boneel. + +Added Ruby rewrite of objview.csh by Rob Guglielmetti. + +Fixed bug in reciprocity for tensor tree BTDF representations. Thanks +to Andy McNeil for identifying the problem. + +Added MNAME and ZNAME variables to ranimove for debugging & testing. + +Created pmblur2 command to take motion and depth buffers from ranimove +to compute a better motion blur. + +****** COMPATIBILITY CHANGE ******** +Changed BSDF routines to use updated/corrected XML specification and +removed depracated BSDF support from mkillum. + +Fixed behavior of i/o flushing in rcontrib with -c > 1 (averaging). Thanks +to Lars Grobe for help identifying this problem. + +Fixed bug in depth-of-field blur where view distance was measured from +fore clipping plane rather than viewpoint. Thanks to Peter A-B for +pointing this out. + +Added options to dctimestep to allow multiple time steps (-n) +and multiple output pictures or sensor files (-o). Also added -i +option to specify float (-if) or double (-id) input for sky matrix. + +Created gendaymtx program to compute annual sky patch matrix based +on Ian Ashdown's implementation of Perez all-weather sky model. +Output can be sent directly to dctimestep in ASCII or binary stream. + +Replaced existing gendaylit.c with improved version from Wendelin Sprenger +and Jan Wienold of ISE. + +Improved accuracy of ambient calculation for large -ad settings. Thanks +to Lars Grobe for noticing the problem. + +Added -r option to gendaymtx to rotate the sky the specified number of +degrees about the zenith as suggested by A. McNeil. + +Axel Jacobs added -pal eco color map that does a blue-red-yellow scale. + +Created bsdf2klems tool to convert from various BSDF representations to +Klems basis matrix in XML file. + +Fixed problem with inappropriate reciprocity enforcement on tensor +tree reduction in genBSDF. (Thanks to A.McNeil for discovering issue.) + +Fixed bug in isotropic tensor tree sampling for impinging rays +exactly normal to surface. Thanks to Peter Apian-Bennewitz for +discovering and pointing out the error. + +Fixed double-counting bug in mirror material with alternate type. +Thanks to David Geisler-Moroder for spotting the problem and helping +to fix it. + +Created rcollate program to resize and transpose matrix data for Andy +McNeil's 5-phase annual simulation method. + +Added epw2wea conversion program by Christoph Reinhart. + +Implemented Perlin's improved noise function with help from Rahul Narain. +This will change the appearance of renderings using this function. + +Added "origin" command to rvu as requested by John Mardaljevic +to place view origin at selected point in scene. + +Switch to Perl versions of objview and objpict written by Axel Jacobs. + +Improved rendering speed of scenes with aliases by not entering new +modifiers into table if they are the same as the previously defined +modifier for that name. + +Made it so icalc and rcalc search RAYPATH directories for *.cal files +given on command line. This simplifies script writing and makes these +utilities consistent with other tools in Radiance. + +Added triangulation routine to handle convex polygons in obj2mesh. + +****** COMPATIBILITY CHANGE ******** +Made backface visibility apply to all material types, including +transparent and translucent materials (except dielectric and interface). +This makes the option useful in cases where adjacent trans surfaces +are placed next to each other by a modeler that only understands +volumetric objects. + +Changed dctimestep so that output matrices (-n > 1) are preceded by a +header, and added support for float and double output formats with -o[fd]. + +Introduced eplus_adduvf program to compute user view factors for EnergyPlus. + +Changed image-plane sampling in rpict to use Hilbert curve, which gives +less of a brushed/striped appearance to output pixels with -u- (default). + +Added ltview and ltpict Perl scripts contributed by Axel Jacobs, inspired +by Rob Guglielmetti. + +Added header variables for NROWS, NCOLS and NCOMP to help standardize +matrix files. This functionality has been incorporated into +rcollate, gendaymtx, and dctimestep. + +Created rmtxop utility to operate on multi-component matrices. This +facilitates some daylight matrix calculations, and provides a general +tool for manipulating matrix data. + +****** COMPATIBILITY CHANGE ******** +Introduced new Hessian-based error control in irradiance caching (ambient) +calculation. Since the format of the stored ambient values is different, +the old files will be rejected with an error message and must be removed. +The programs may be compiled with the -DOLDAMB option if this is a problem. + +Added -p option to rcontrib to set function file parameters on a per-modifier +basis to simplify bin evaluation. + +Created rfluxmtx program to compute flux transfer matrices from a sender +surface to one or more receiver surfaces. (Renamed the file klems_int.cal +to klems_full.cal in the process.) + +Added "-c" option to getinfo to execute command on data segment. + +===================== +Version 5.0 + +Changed rmtxop so it writes out same type as lesser of inputs unless +directed otherwise using -f? option. + +Changed order of oconv arguments in rfluxmtx so user can specify input +octree using -i option at the end instead of (or in addition to) a +list of scene files. + +Added support for argument expansion to rfluxmtx and bug fixes. + +Fixed bug in indirect hemisphere sampling for some corner cases. + +Added default specular lobe to BSDF interpolation. + +Set minimum number of shadow checks before direct optimization (4). + +(Above changes included in 4.2.1 patch release.) + +****** COMPATIBILITY CHANGE ******** +Made header input and output the default behavior for dctimestep and +genskyvec. + +****** COMPATIBILITY CHANGE ******** +Changed pabopto2bsdf default behavior to add 90-degree rotation +to bring pgII's definition of "up" in line with Klems axis +conventions. Introduced a new header variable "upphi" to +control this added rotation. Using "#upphi 90" in each +BSDF input file gets back the original behavior, where it +assumes that the up direction is 90-degrees from the X-axis. +The default value of 0 corresponds to PAB's definition of +the X-axis as being "up". + +Fixed bug in rsensor related to having many rows (altitude) and +few columns (azimuth) in sensitivity file. + +Fixed floating point round-off error in new Hessian calculation +for some sytems (Windows, primarily). + +Fixed bug in tensor tree BSDF code that caused bus error on +some systems, and may have been source of other errors as well. + +(Above changes included in 4.2.2 patch release.) + +Improved ambient extrapolation to avoid zero values. Actual +threshold set to 5% of recorded value. + +Changed anisotropic Gaussian and Ashikhmin models so that +illegal orientation vectors are dealt with more gracefully. + +Created wrapBSDF tool and incorporated into genBSDF along +with new rfluxmtx computation. + +Initial check-in of Roland Schregle's photon map integration. +New 5.0a version designation as suggested by Andy McNeil. + +Added left-hand coordinate sytems to rfluxmtx to correct +problems with coordinate axis orientations pointed out by +David Geisler-Moroder. + +Added color output to genBSDF (+C option) and support for +color rendering of Klems and tensor tree data. + +Fixed another bug in rsensor that caused rays to be generated +on opposite side of hemisphere even where sensitivity was zero. + +Fixed bug discovered by Jacob Jonsson in Klems BSDF +interpolator that caused it to over-predict normal +transmittance and reflectance. + +Added ability to read input from commands in dctimestep +and rmtxop. + +Added photon map support to rad. Fixed some double-counting +issues in photon-mapping spotted by David Geisler-Moroder. + +Added photon map support to trad. + +Fixed bug in antimatter source testing when antimatter +definition follows potential obstructor in input. + +Fixed issue with missing character type identifier at head +of genBSDF XML output. + +Prompted by Roland S., added option to have pcompos -a order +rows from top rather than bottom of image. + +Changed dctimestep to accept matrix as well as BTDF input +in the VTDs invocation mode. This permits the output of +rmtxop to be used in a pinch when combining multiple BTDF +layers, although interreflection between layers is not +accounted for properly as it is in the WINDOW program. + +Added Jan Wienold et al.'s evalglare to distribution.