Hi, could you state more question more clearly: what is your model, what functors you use etc -- or post the script? If you have your own Ig2 functors, you need to take in account the shift2 parameter (by which the id2 must be shifted), and then make sure you apply right force in the contact law.
My script. Will work with r2508. -- Best regards, Sergei D.
# -*- coding: utf-8 from yade import utils sphereRadius=0.1 tc=0.001# collision time en=0.3 # normal restitution coefficient es=0.3 # tangential restitution coefficient density=2700 frictionAngle=radians(35)# params=utils.getViscoelasticFromSpheresInteraction(tc,en,es) facetMat=O.materials.append(ViscElMat(frictionAngle=frictionAngle,**params)) sphereMat=O.materials.append(ViscElMat(density=density,frictionAngle=frictionAngle,**params)) # floor n=5. s=1./n for i in range(0,n): for j in range(0,n): O.bodies.append([ utils.facet( [(i*s,j*s,0.1),(i*s,(j+1)*s,0.1),((i+1)*s,(j+1)*s,0.1)],material=facetMat), utils.facet( [(i*s,j*s,0.1),((i+1)*s,j*s,0.1),((i+1)*s,(j+1)*s,0.1)],material=facetMat), ]) # Spheres sphId=O.bodies.append([ utils.sphere( (0.5,0.5,0.2), 0.1, material=sphereMat), #utils.sphere( (0.2,0.5,0.2), 0.1, material=sphereMat), ]) O.bodies[sphId[0]].state.vel=(0.5,0,0) ## Engines O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()], [Ip2_ViscElMat_ViscElMat_ViscElPhys()], [Law2_ScGeom_ViscElPhys_Basic()], ), GravityEngine(gravity=[0,0,-9.81]), NewtonIntegrator(damping=0), ] O.periodic=True O.cell.refSize=Vector3(1,1,1) O.dt=.01*tc O.saveTmp()
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