Dan Weissman
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  • Cambridge, MA
  • United States

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Dan Weissman's Discussions

1. Solution exception:Value cannot be null. Parameter name: collection

Started this discussion. Last reply by Christopher Steffens Sep 7, 2016. 10 Replies

I get this error with DA calc in grasshopper when i try to set some of the windows to have shades. still writes .ill files and shading profiles, but doesn't show grid.any thoughts?Continue

Tags: error, daylight, annual

Radiance is freaking out.

Started this discussion. Last reply by Dan Weissman Dec 7, 2015. 5 Replies

Hey DIVA team-i've run into an interesting, and seemingly frustrating issue. I'm studying a vertical courtyard with reflectors at the top, and finding that when i make the reflectors specular (metal)…Continue

Tags: radiance, metal, specular, tracing, ray

Discrepancy between Illuminance calc and Illuminance from DA calc

Started this discussion. Last reply by Dan Weissman Oct 13, 2015. 7 Replies

hey allI’m getting a significant and persistent discrepancy between point-in-time illuminance calcs and the illuminance from DA calc. The illuminance from DA consistently is about 3x the illuminance…Continue

Tags: illuminance, autonomy, Daylight

Dynamic Shading question

Started this discussion. Last reply by J. Alstan Jakubiec Sep 19, 2015. 1 Reply

I just ran my first ever dynamic shading, and a bit confused. after running the DA calc, it shows that the blinds close at what seems like the correct time, but they don't open again. do i have to…Continue

Tags: shading, dynamic


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