Hi,

Please tell me how to change final falsecolour image's heading in a results column(in grasshopper DIVA). I want to display lux, instead of cd/m2

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Thanks. Yes, I know the difference. But the problem is that when doing it manually I can add parameter (-i) in radiance to calculate illuminance and get an falsecolour image showing illuminance amount just as luminance.

Then you can simply change the label in wxfalsecolor, and you are done- launch it from the radiance bin folder in the diva folder, open the original image, falsecolor apply with new label.

Hi Max,

That is not correct. By adding the -i parameter to a Radiance rendering, it turns the surface each pixel view ray hits into an illuminance sensor, so there is truly no way to do a conversion.

Farid, you can do the same through the DIVA Grasshopper interface. Just click the settings button and add a -i in the Simulation Parameters > Radiance Parameters field.

Best,

Alstan

Hi Alstan,

Thanks. I know the -i parameter because you have already told me this in other discussion). But the problem is "heading". How can I change heading to LUX? Because it shows cd/m2(as in the screenshot above) and gives me a completed image so that I can not manage it like in the DIVA toolbar rendering. And another question. Can I also do contour-line illuminance from grasshopper?

Actually, I think what Max said is true)

Thanks

Yup sorry that's what I meant, considering he triggered -i already - didn't want to imply that changing the label changes the units, which it doesn't; so as the surfaces are triggered as illum sensors already through the -i, imho I think he *can* just change the label units.

Yes and that is what I've asked)

Thanks Alstan

Thanks Max

Ah ok -- I've completely misunderstood what is going on. Apologies. From Grasshopper simulations, the original .pic file should be located in c:\DIVA\Daylight\Grasshopper\Projects\PROJECTNAME-Visualization\PROJECTNAME.pic. Just open it with the program, c:\DIVA\Radiance\bin\wxfalsecolor.exe and you can generate your own falsecolor info as below. It should automatically detect that its an illuminance image, but if not just change the units in the pink box.

Best,

Alstan

Hi Alstan - where do you put the -i parameter in the radiance parameter definition? 

J. Alstan Jakubiec said:

Hi Max,

That is not correct. By adding the -i parameter to a Radiance rendering, it turns the surface each pixel view ray hits into an illuminance sensor, so there is truly no way to do a conversion.

Farid, you can do the same through the DIVA Grasshopper interface. Just click the settings button and add a -i in the Simulation Parameters > Radiance Parameters field.

Best,

Alstan

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