| 1979 |  | ****** COMPATIBILITY CHANGE ******** | 
| 1980 |  | Made header input and output the default behavior for dctimestep and | 
| 1981 |  | genskyvec. | 
| 1982 | + |  | 
| 1983 | + | ****** COMPATIBILITY CHANGE ******** | 
| 1984 | + | Changed pabopto2bsdf default behavior to add 90-degree rotation | 
| 1985 | + | to bring pgII's definition of "up" in line with Klems axis | 
| 1986 | + | conventions.  Introduced a new header variable "upphi" to | 
| 1987 | + | control this added rotation.  Using "#upphi 90" in each | 
| 1988 | + | BSDF input file gets back the original behavior, where it | 
| 1989 | + | assumes that the up direction is 90-degrees from the X-axis. | 
| 1990 | + | The default value of 0 corresponds to PAB's definition of | 
| 1991 | + | the X-axis as being "up". | 
| 1992 | + |  | 
| 1993 | + | Fixed bug in rsensor related to having many rows (altitude) and | 
| 1994 | + | few columns (azimuth) in sensitivity file. | 
| 1995 | + |  | 
| 1996 | + | Fixed floating point round-off error in new Hessian calculation | 
| 1997 | + | for some sytems (Windows, primarily). | 
| 1998 | + |  | 
| 1999 | + | Fixed bug in tensor tree BSDF code that caused bus error on | 
| 2000 | + | some systems, and may have been source of other errors as well. | 
| 2001 | + |  | 
| 2002 | + | (Above changes included in 4.2.2 patch release.) | 
| 2003 | + |  | 
| 2004 | + | =================== | 
| 2005 | + | Version 5.0 | 
| 2006 | + |  | 
| 2007 | + | Improved ambient extrapolation to avoid zero values.  Actual | 
| 2008 | + | threshold set to 5% of recorded value. | 
| 2009 | + |  | 
| 2010 | + | Changed anisotropic Gaussian and Ashikhmin models so that | 
| 2011 | + | illegal orientation vectors are dealt with more gracefully. | 
| 2012 | + |  | 
| 2013 | + | Created wrapBSDF tool and incorporated into genBSDF along | 
| 2014 | + | with new rfluxmtx computation. | 
| 2015 | + |  | 
| 2016 | + | Initial check-in of Roland Schregle's photon map integration. | 
| 2017 | + | New 5.0a version designation as suggested by Andy McNeil. | 
| 2018 | + |  | 
| 2019 | + | Added left-hand coordinate sytems to rfluxmtx to correct | 
| 2020 | + | problems with coordinate axis orientations pointed out by | 
| 2021 | + | David Geisler-Moroder. | 
| 2022 | + |  | 
| 2023 | + | Added color output to genBSDF (+C option) and support for | 
| 2024 | + | color rendering of Klems data. |