| 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 | 
+ | 
Improved ambient extrapolation to avoid zero values.  Actual | 
| 2005 | 
+ | 
threshold set to 5% of recorded value. | 
| 2006 | 
+ | 
 | 
| 2007 | 
+ | 
Changed anisotropic Gaussian and Ashikhmin models so that | 
| 2008 | 
+ | 
illegal orientation vectors are dealt with more gracefully. | 
| 2009 | 
+ | 
 | 
| 2010 | 
+ | 
Created wrapBSDF tool and incorporated into genBSDF along | 
| 2011 | 
+ | 
with new rfluxmtx computation. |