analysis for 50% daylight coverage at any given time

Hello there,

I am trying to figure out a way that I can discover the number of total minutes that a test surface receives at least 50% (at any given moment) of direct sunlight exposure between 9am-3pm.

Is there an easy way to do this in ladybug? Please see my grasshopper script and .3dm file below.

Attachments:

170202_sunlight analysis.3dm, 3.8 MB
170203_sunlight analysis_script_parametric building heights_percentages.gh, 453 KB

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Permalink Reply by Devang Chauhan on February 4, 2017 at 4:11am

I did the same in your file. Please find revised file attached.

-Devang

Attachments:

170204_sunlightanalysis_script_parametricbuildingheights_percentages.gh, 583 KB

Permalink Reply by Devang Chauhan on February 4, 2017 at 5:39am

I ran a quick study on your model. I was looking into the number of hours everyday between 9am to 3pm every month when at least 50% of test geometry would receive sunlight. Following are results.

-Devang

Permalink Reply by ClaudiavV on February 5, 2017 at 10:17pm

Hi Devang - thank you so so much for you help! it works like a charm! perfect!

Permalink Reply by Devang Chauhan on February 5, 2017 at 11:06pm

Sure. I enjoyed doing this. I liked this line of inquiry. Thanks for sharing this with us.

Permalink Reply by ClaudiavV on February 7, 2017 at 3:08pm

Hi Devang,

I was wondering if you may be able to help me find a solution for another extension I have made to this script? I am trying to use galapogas to solve the best solution for maximum floor area whilst remaining above the 180mins sunlight coverage at 50%. I have it currently solving for the greatest floor area but i am not sure how to add the other criteria of only finding solutions that are above the required sunlight hours (180mins) - do you have any ideas/ tips??

Please see my attached files to get a better idea of what I mean :)

Attachments:

Permalink Reply by Abraham Yezioro on February 7, 2017 at 10:26pm

Claudia,

Galapagos allow you ONLY one fitness function. In your case either the time or the coverage. If you want to combine them you need to create your own function that gives you one value that you can connect to galapagos.

The other option is using Octopus instead Galapagos, that will receive multiple functions.

-A.

Permalink Reply by Devang Chauhan on February 8, 2017 at 4:10am

Hi Claudia,

As Abraham pointed out, Octopus will be a better match for a multi objective optimization. However, the current Octopus version does not work with Gh 9.0076 (Crashes Rhino) so I am not able to provide a workflow for Octopus.

I have set up something using Galapagos that meets your criteria.