illumination mismatch

Dear usergroup,

After extruding a floorplan in Google sketch-up i inserted windows for all orientations, exported the scene to radiance and started illuminance and hence DF calculations. Except from one orientation the results look valid. But the illuminination entering from the north facing window is over estimated. I get a DF above 10 up til 15 m from the facade. It looks like north wall is not taken into account in the calculation. There are no problems when I excluce the north window.

Here is data extrated from my geometry file:

# north wall
white_paint polygon t_2_0
0
0
36
115.981526 75.891011 0.000000
115.981526 75.891011 28.000000
0.000000 75.891011 28.000000
0.000000 75.891011 12.800000
17.292543 75.891011 12.800000
0.528300 75.891011 18.200000
115.477026 75.891011 18.200000
115.477026 75.891011 19.850000
0.528300 75.891011 19.850000
0.528300 75.891011 18.200000
17.292543 75.891011 12.800000
17.292543 75.891011 0.000000

# North window
LT70 t_33_0
0
0
12
115.477026 75.891011 19.850000
0.528300 75.891011 19.850000
0.528300 75.891011 18.200000
115.477026 75.891011 18.200000

I have debugged the geometry and calculation procedure and found no mismatch. Have anybody experienced the same illumination mismatch before?

Any help is appreciated.

/Per

      Trænger du til at se det store billede? Kelkoo giver dig gode tilbud på LCD TV! Se her http://dk.yahoo.com/r/pat/lcd

How is the material of the window defined. In the above code the
"polygon" keyword is lost. I think that's a copy-and-paste issue.

Thomas

···

On Wed, Oct 14, 2009 at 8:12 AM, Per Haugaard <[email protected]> wrote:

# North window
LT70 t_33_0
0
0
12
115.477026 75.891011 19.850000
0.528300 75.891011 19.850000
0.528300 75.891011 18.200000
115.477026 75.891011 18.200000

Hi group,

That is a copy paste issue. The window is defined as:

# North window
LT70 polygon t_33_0
0
0
12
115.477026 75.891011 19.850000
0.528300 75.891011 19.850000
0.528300 75.891011 18.200000
115.477026 75.891011 18.200000

The Material LT70 is defined as:

void glass LT70
0
0
3 0.76 0.76 0.76

/Per

--- Den ons 14/10/09 skrev Thomas Bleicher <[email protected]>:

···

Fra: Thomas Bleicher <[email protected]>
Emne: Re: [Radiance-general] illumination mismatch
Til: [email protected], "Radiance general discussion" <[email protected]>
Dato: onsdag 14. oktober 2009 10.52

On Wed, Oct 14, 2009 at 8:12 AM, Per Haugaard <[email protected]> wrote:

# North window
LT70 t_33_0
0
0
12
115.477026 75.891011 19.850000
0.528300 75.891011 19.850000
0.528300 75.891011 18.200000
115.477026 75.891011 18.200000

How is the material of the window defined. In the above code the
"polygon" keyword is lost. I think that's a copy-and-paste issue.

Thomas

      Trænger du til at se det store billede? Kelkoo giver dig gode tilbud på LCD TV! Se her http://dk.yahoo.com/r/pat/lcd