yade-users team mailing list archive

["Chen, Feng" <fchen3@xxxxxxx>]

Hi, all:
 
I am recently having such kind of problem, I have two costomized engines, one is  called "ConvergenceEstimator", which is used to evaluate some maximumUnBalanceForce over the contactForce ratio (this will return a CCValue to evaluate whether the whole particle system is close to equilibrium), then I have another engine "DampingAdjustment" designed to change the initial simulation parameter, in my case, the damping coefficient, for example, from 0.3 to 0.4.
 
I have one piece of code in the preprocessor (similar to SDECSpheresPlane) which looks like this:
 
///--------------------
...
rootBody->engines.push_back(ConvergenceEstimator);
rootBody->engines.push_back(DampingAdjustment);
///--------------------
 
This means my DampingAdjustment Engine needs the return values of the previous engine, I need to have something in DampingAdjustment like(I think should be in DampingAdjustment::applyCondition(Body* body)):
 
if (convergenceEstimator->getCCVaue() <=eps)
     dampingCoefficient = 0.3;
else
     dampingCoefficient =0.5;
 
I think this is purely a programming problem, how to access the ConvergenceEstimator which is the other engine?
 
I hope I have made my problem clear. Thank you very much!
 
Feng Chen
 

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