generative modeling for Rhino
first of all - the twl.uni-ak.ac.at karamba page is outdated- please refer to
where the latest karamba release 0.9.0.84 is available in different licences.
in the pro version (and also in the 20-member trial version) there is a component doing efficient cross section optimization. for its usage and settings please refer to the manual first.
kind of a workaround is an earlier definition with hoopsnake, doing rough, simple iterative cross section design by moments and normal forces. http://www.grasshopper3d.com/group/karamba/page/example-files
Djordje your file can not be opened with 0.9.0.84 release.
sorry I saw that you are using 0.9.0.7
If you want to define cross section types according to axial normal forces you should make sure not have too much bending moments in your elements .. like in a truss system.
To assign the cross section types, you have to analyze your model first, otherwise you of course dont know where the respective forces occur. With the 'resultant section forces' component you can determine in which items of your list of beams the axial force is either below, similar to, or above zero, split the list accordingly and modify the beams separately (how to do this there are several ways , but this is an easy an clear one).
You have to build up a model a second time, after you analyzed it firstly. To do this, use 'disassemble model', and there pick the respective beams that are tension or compression, modify them then assemble a new model.
Any chance of making a quick definition for that?
I think in that way it would be much easier, as I did not quite understand you.