algorithmic modeling for Rhino

Hi everybody!
I'm Martina, from São Paulo, Brazil.
I'm  starting now to learn about how to use Grasshopper and Rhino.
Especially now I'm trying to do a Sun Path according this video:
However,  shadow isn't appearing in my case.
I am in Diva Sun Path View but there is no shadow (screen shot).
In addition I would like to introduce Location by latitude and longitude, but do not know where I should introduce the values.
Somebody could you help me?
Really Thanks,

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Comment by Jiří on March 27, 2018 at 2:09pm

Hi Martina, 

how did you solved the first problem in the head of this topic with DIVA and displaying the shadows? 

Thank you a lot! 


Comment by Martina Pacifici on June 26, 2017 at 4:00pm

Hi Ernesto,

thanks for having met my mistake!

With your help I was able to finish my academic work:)



Comment by Ernesto Cesario on June 18, 2017 at 4:04am

Hi Martina,

I found the just need to delete the Brep component and drug directly the output from the shadow component into the display..I tried into the exmple file too that you find attached and it works fine now

please find attached the grh files(wetransfer)


Comment by Martina Pacifici on June 17, 2017 at 8:44am

Ok Ernesto...

you could try by this link (made by we transfer):

tell me if you can open it.



Comment by Ernesto Cesario on June 17, 2017 at 1:53am

sorry Martina but I can't find attached your 3dm and grh files..I can see only a screenshot :)

Comment by Martina Pacifici on June 16, 2017 at 1:42pm

Of course, Ernesto!

I posted (grh and 3md...cause my geometry is not visible in the grh)...

The LadyBug says that error is in the "Data Conversion failed from Mesh to Curve".

It depends of geometry?Too complex buildings?

I tried with a more simple model (just one building) and I have the same problem.

What can I do?

Thanks for you interest!


Comment by Ernesto Cesario on June 16, 2017 at 11:25am


could you please upload you grh file?

as soon as I can I will take a look to your project..



Comment by Martina Pacifici on June 16, 2017 at 10:04am

Thanks you Ernesto!

From your link, I've understood that maybe the file example "Vector Based Shadow Study"  ( ) was good for my purpose. So, I implemented the same procedure for my urban domain but unfortunately I can not see the shadows on the ground (look at the two red components in the screenshot). The same thing happens when I run the file exemple on my computer, shadows are not visible because they are not projected. Do you have another precious advice on this argument?



Comment by Ernesto Cesario on June 14, 2017 at 11:49am

Hi Martina,

I'm glad that you turn to the dark side of the Force :)

have a look here

hope this helps


Comment by Martina Pacifici on June 14, 2017 at 10:09am

Hi Ernest!

I am very grateful for your reply, I solved the problems above and I have already done various Ladybug tutorial, as you suggested:)

However, I still have not been able to solve a fundamental issue: how to calculate the shaded surface area (numerically and not just graphically), even when more shadows intersect each other?

I did find tutorials not enough clear about it. Could you give me some suggestion on this topic?

Really thanks,






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