I haven't worked _on_ this project but I did work with it a little bit, and tried to write a small analysis routine for a class I took. Check out the OpenSEES Project at Berkeley for a good example of a OOP solution to an engineering problem. Every portion of the analysis, from equation solvers and matrix routines to structural elements and material models are broken into objects. It's an ambitious project but it's moving quickly. And it's even open source!
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I haven't worked _on_ this project but I did work with it a little bit, and tried to write a small analysis routine for a class I took. Check out the OpenSEES Project at Berkeley for a good example of a OOP solution to an engineering problem. Every portion of the analysis, from equation solvers and matrix routines to structural elements and material models are broken into objects. It's an ambitious project but it's moving quickly. And it's even open source!