Question #189288 on Yade changed: https://answers.launchpad.net/yade/+question/189288
liucheng83 posted a new comment: Really, I want to build an array like this tt=[] tt=[ForceEngine(ids=[i],force=(0,0,i),label="ttForce") for i in ids_sp] and tt[0],tt[i] are the ForceEngine, but I donnot know how to add it to the O.engine if ids_sp is a big number. a loop method like "for i in ids_sp " cannot be insert to O.engine like this: O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=interactionRadius,label='aabb'),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=interactionRadius,label='Ig2ssGeom'), Ig2_Facet_Sphere_ScGeom(),], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] ), ## Apply tt Force to some particles ForceEngine(ids=[i],force=(0,0,i),label="dragForce"+str(i)) for i in ids_spSlurry # a message SyntaxError: invalid syntax is given NewtonIntegrator(damping=0.1,gravity=(0,0,-9.81)), PyRunner(command='checkInteraction()',iterPeriod=iterPeriod_checkInteraction,label='checker') ] # a message SyntaxError: invalid syntax is given because of using for loop PyRunner, which executes O.forces.addF for each particle in each iteration may be a method, but it is not the most efficient one, maybe the force keep as a constant for a time, and then anoter constant for a next time. How to solve it, please give some advice, somebody, thank you! -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp