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Hello guys ! I need a little help. I have a curve and I am trying to get secondary curves around it. And finally to convert it to geometry with polywire. I don't want my curves to interpenetrate or to twist. I scatter points into a circle. I give an individual attribute to each point. I copy them to the points of the curve. I tried polyframe and vex code to keep the orientation of the points along the curve. I manage to get it but now I see that my secondary curves twist at some points. I think that I should use quaternion as orient before the copy but I don't know how to use it. For the moment, I've got this in my wrangle before the copy : v@N = v@N ; vector tangentu = v@tangentu; vector up = set(0,1,0); vector side = cross(tangentu, up) ; v@up = side; v@side = side ; v@N = tangentu ; // p@orient = set(@tangentu.x, @tangentu.y , @tangentu.z, radians(90) ); At the end, I will use a polywire (and I don't want them to twist around my main curve). Do you have some ideas of how I can do this ? I join the scene to explain. epe_copyWithRotationAlongCurve.hipnc