yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Agreed. First, check that your files are really compiled (you should see 
a newEngine.so in install dirs). If they are not, it is probably due to 
a missing declaration in SConscript files (those files define what needs 
to be compiled and the dependencies between classes).
Just copy/paste/rename the GravityEngine section in dem/Sconscript (or 
common/SConscript, not sure).

IIRC, the preprocessor will not appear in the interface if one of the 
plugin (the library corresponding to your new class) is not found. I 
think this will happen as soon as you declare the missing class in your 
code, it doesn't matter if you use it or not.
Don't you get any compilation errors? warnings when you start Yade?

If I understand correctly, you will need to play with distant 
interactions (without contact), which means you could be interested by 
the current discussion on this topic here : 
http://yade.wikia.com/wiki/Sanitizing_Contact_Logic.

Bruno



Jerome Duriez a écrit :
> I think that's typically because you didn't modify the § concerning the 
> preprocessor file in the "Sconscript". You have also to modify it by 
> adding a line with the name of your new engine.
>
> Jerome
>
> Benjamin Fragneaud a écrit :
>   
>> Hi everybody,
>> I'm trying to create an Engine that aplly Electrostatic force to a sphere.
>> I´d like to allow displacement of bodies depending on the charge and  
>> the electrical potential.
>> Perhaps I should precise that I´m quiet new to Yade and C++ programmation.
>>
>> To do so, I decided to inspire myself with an already written  
>> preprocesor: "funnel", which has been modified in order to generate a  
>> random cloud of spheres in a closed box.
>> At this step every thing is working as I want to.
>>
>> * Creation of a new stand alone Engine:
>> As well as I did before, I used an already written engine and modified  
>> it. But here is the problem.
>> - I copy paste the GravityEngine.
>> - rename it, rename the functions within and shrd_ptr,
>> - I also rename the .hpp file
>> - add it in the corresponding scons file
>> It compiled well (no error) and was added to the libnewengine.so.
>>
>> In esance it should do exactly the same thing than the GravityEngine  
>> but with a different name.
>>
>> Nevertheless, when I try to use it within my new preprocessor, it  
>> doesn´t appear anymore in the preprocessor generator list (yade  
>> graphique interface).
>>
>> Moreover, If I just declare it in the list of classes used withtout  
>> using it (like declaring something that you don´t use), the  
>> preprocessor also don´t appear in the preprocessor list...
>> Is anybody has any idea about what is wrong.
>> Thanks for your help,
>> Best,
>> Ben
>>
>>
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>>   
>>     
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Chareyre Bruno
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BP 53 - 38041, Grenoble cedex 9 - France
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