Question #660533 on Yade changed: https://answers.launchpad.net/yade/+question/660533
Jérôme Duriez posted a new comment: Hello, For sake of educational purposes, it's maybe worth to emphasize there was plenty of reasons for your initial script to "do nothing" - your PyRunner was supposed to execute some "gravity()" Python function, however none was defined. You just defined a "graviy()" function (without "t"). Actually I'm expecting this code to throw an error instead of doing nothing... - what you wanted is to modify the gravity attribute of the NewtonIntegrator engine instance which was in your O.engines. This was not possible with your commands (see below) - with gravity=a in the NewtonIntegrator() line of your O.engines definition, you affect the current value of "a" to the gravity attribute, through a "passing by value", not a "passing by reference". Subsequent changes to a's value will not be reflected in O.engines[3].gravity... - you're mixing Python tuples (the type of "a") and Vector3r (i.e. 3 real vectors, the type of NewtonIntegrator.gravity). You can thank YADE developers for this to be gracefully handled here (things here work as intended by the user), but I doubt you will always be that lucky in your future YADE-ing ;-) Jerome -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
