Grasshopper

algorithmic modeling for Rhino

# Galapagos Annual Radiation Form Finding

Using the latest release of diva-for-grasshopper component with the diva-for-rhino environmental analysis tool available at www.diva-for-rhino.com. Parametric form is a closed triangular panelized shape with 13 vertices constrained in movement along vectors determined by the corners and centroids of a cube. The genetic algorithm component galapagos- part of the grasshopper program by David Rutten- was used. The "genes" were the location of the 13 vertices and the rotation of the form. The "fitness" function is described by the maximal surface irradiation per unit volume. This was calculated using the GenCumumlativeSky program which is part of Radiance and accessible through DIVA. A Boston weather file was used.

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Comment by Jeff Niemasz on December 5, 2011 at 8:17am

The fitness was defined as maximal surface irradiation per unit volume. In this model an analysis node was created at the center of each face and directed at the normal to that face. The annual solar radiation at this node was multiplied by the area of that face. This was summed for each surface and divided by the volume of the brep. I know it is a fairly abstract example.

Comment by dimitris koletsios on November 23, 2011 at 6:51am

hello!

the wire from the fitness (galapagos button) were does it goes? can u describe for us the definition?

Comment by C. H. Ha on May 3, 2011 at 11:20am

Great work. I'd better try diva as well. :) I've been using geco and ecotect myself and

you could achieve similar results in this setup as yours.

Comment by Jeff Niemasz on January 29, 2011 at 6:44pm
The triangulation/form definition I was using is much more simple, just 24 triangles based on an ordered set of points. This was just a dry run to show that the new assembly which downloads with the Diva toolbar works, I will be making a couple more modifications in the next day or two to work out some bugs. I am most in interested in the effects of the different constraints of the form definition. But I tried it out today on meshes of more free form surfaces and it seems to work. I am not familiar with ecotect's radiation maps and how they are calculated, do you know?
Comment by Rodrigo Medina on January 28, 2011 at 1:25pm
Congrats this looks great , I´m working on a similar experiment but I´m using Geco and ecotect are you using delunary Triangulations for generating the mesh ??

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