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Tag: GitHub

OpenSees Time Machine

I recently found two Zip disks in my office. They were the next big thing for about 15 minutes in the late 1990s and early 2000s. I then got my hands on an external Zip drive and was able to offload the disks' contents. One disk has lecture notes and assignments from a few graduate … Continue reading OpenSees Time Machine →

Positive Definite OpenSees 10 Comments November 11, 2019November 3, 2020 2 Minutes

Only Their Mother Can Tell Them Apart

In January 1999, when OpenSees was known as G3, Prof. Fenves created G2 for teaching nonlinear structural analysis in CE 221 at UC Berkeley. G2 was written in MATLAB with an architecture similar to G3. I took CE 221 and used G2 for the homework assignments, but after a few years I lost the code. … Continue reading Only Their Mother Can Tell Them Apart →

Positive Definite OpenSees 7 Comments November 7, 2019November 7, 2019 2 Minutes

OpenSees Source Control: From Zip to Git

Back in the G3 days, when there were essentially two developers, Frank kept the source code up to date on a Zip disk that he stuffed into a cargo pocket of his pants each afternoon. Frank instructed me to retrieve the disk if he was ever hit by a bus. As long as the buses … Continue reading OpenSees Source Control: From Zip to Git →

Positive Definite OpenSees 4 Comments November 1, 2019June 26, 2020 2 Minutes

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