[Radiance-general] Direct horizontal illuminance

[TSANG Kai Kwong]

Dear all,


I have a problem on finding the direct horizontal illuminance (DHI) following the steps provided by Dr. Phillip Greenup (Page 253 @ goo.gl/Bw68WQ)


I am able to find the horizontal global illuminance using "rillum.exe". However, I am not able to find out the direct horizontal illuminance. It said:


warning - no light sources found

0


It should not be zero. How can I solve this problem? Hope you guys can help.


FYI, this is my sky.rad.


void brightfunc skyfunc
2 skybright ssldlum.cal
0
10 177 30.2 4 -0.7 0 -1 0 -0.675211 -0.729544 -0.108883

skyfunc glow ground_glow
0
0
4
     1 .8 .5 0

ground_glow source ground
0
0
4
     0 0 -1 180

skyfunc glow sky_glow
0
0
4 .991 .991 1.101 0

sky_glow source sky
0
0
4 0 0 1 180

Best regards,
Dennis Tsang

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