Shadows by daily sun path, informing agents in processing

Hi, i want to take the shadows of a daily sun path for a given site and time like the ones in the following example:

 https://www.youtube.com/watch?v=gqtHqODuhKk&feature=player_embe...

and use them as data to inform agents behaviour in processing. The difference is that i need the whole 3d volume of the shadow and not only the projection on the ground. Is this possible with Grasshopper+ghowl?

Another thought that i had for doing this, was to construct an array of meshes in witch each mesh would represent the shadow volume for every quarter of an hour through the day (8.00 to 18.00,september 11 so aprox 48 meshes)  and construct a definition in grasshopper with a slider that would control witch mesh (geometry) would be connected each time in processing for simulation.

I know that i ask a lot but any information on how to proceed with any of my 2 approaches  would be very helpful.

Thank you very much in advance.