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How to exclude sphere-facet interaction data

Asked by Sina Jafari

hi all,
I have recorded interaction data successfully into a file but I don't want interaction data type of facet-sphere to be recorded. I don't know how to exclude these data so that they are not written in the output file. thanks for your help!

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Jérôme Duriez
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Best Jérôme Duriez (jduriez) said : 		#1

Hello,

This is in fact quite easy with python tests about the shape of the two interacting bodies, using python function isinstance() to know if they are Facet.

For ex :
for i in O.interactions: # then i.id1 and i.id2 are the IDs of the 2 interacting bodies

   if not (isinstance(O.bodies[i.id1].shape,Facet) or isinstance(O.bodies[i.id2].shape,Facet) ): #isinstance(Object,Class) is true when the "Object" is an instance of the "Class", i.e. here if the shape of body i.id1 or i.id2 is a Facet
         # do your task with the output file

Jérôme

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Hien Nguyen (giahien) said : 		#2

Jerome's answer is more general and totally right.

Alternatively, for fast coding, if you know exactly the Id of the facet you can do like this, for example id of the facet is 0,1,2:

for i in O.interactions:
  if i.id1<3 or i.id2<3: continue
  your-record-function()

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Sina Jafari (sinajafari88) said : 		#3

Thanks jduriez, that solved my question.

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Sina Jafari (sinajafari88) said : 		#4

Thanks Hien Nguyen