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[Christian Jakob <question190529@xxxxxxxxxxxxxxxxxxxxx>]

Question #190529 on Yade changed:
https://answers.launchpad.net/yade/+question/190529

Christian Jakob posted a new comment:
Ok, i found out, that it is much more easy with

	for i in O.interactions:
		z_int=i.geom.contactPoint[2]	#z coordinate of interaction
		if ((z_int < water_height) and (i.isReal)):
			print z_int

but i see negative coordinates, how is this possible?
my model is everywhere z > 0 , but i get:

-0.000325541292072                                                                                                                                     
-0.000760969137883                                                                                                                                     
-0.000368990828872                                                                                                                                     
-0.000660870523873                                                                                                                                     
-0.000396151777372                                                                                                                                     
-0.000625752246923                                                                                                                                     
-0.000506016794083                                                                                                                                     
-0.000366152868505                                                                                                                                     
-0.000415623873535                                                                                                                                     
-0.000442005286835                                                                                                                                     
-0.000364966155445

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