dctimestep SEGFAULTS for sky vectors where all lines consist of zeros

radiance-dev
1

I get a SEGFAULT from dctimestep if the sky vector is all zeros.

If I run dctimestep during the night it SEGFAULTs:

~/radiance/3phase$ gensky 9 21 04:00 +s -a 37.71 -o 122.21 -m 120 |
genskyvec > sky.dat

~/radiance/3phase$ dctimestep /dev/shm/comp/back_glazing_mat_%03d.hdr
~/1122/dynamicRadianceTemplate/scripts/70_NoBlinds.xml win1.dmx sky.dat >
pic.hdr

Segmentation fault

~/radiance/3phase$ cat sky.dat | sort | uniq

0 0 0

perry@chinstrap:~/radiance/3phase$

At a more normal time of day dctimestep works properly.

~/radiance/3phase$ gensky 9 21 08:00 +s -a 37.71 -o 122.21 -m 120 |
genskyvec > sky.dat

~/radiance/3phase$ dctimestep /dev/shm/comp/back_glazing_mat_%03d.hdr
~/1122/dynamicRadianceTemplate/scripts/70_NoBlinds.xml win1.dmx sky.dat >
pic.hdr

I was trying to generate a sequence of images to animate. I can substitute
black frames, but I thought maybe dctimestep could be extended to handle
this condition as well.

Tim