Rob - I believe what is happening here is a units problem. I notice that your model is at a very large coodinate system. This is normal for Architectural site plans. This can cause odd geomtry problems when dealing with small detailed areas of the model, like your sections. It cann also effect the accuracy of trim curves and the joining of objects. So, to fix the problem I rebuilt the model close to 0,0,0. Then your grasshopper definition worked great. Here are the steps I used:
Move the building to 0,0,0. Scaled the building into meters Created new surfaces using endpoint object snap. Joined the new surfaces together Deleted the old surfaces Checked for naked edges. Then you definition worked fine. I am not sure if in this case this is a bug or not, so I will log it to have a programmer look a the problem further. But, I hope these instruction might get you on your way. - Scott On Jan 6, 6:35 pm, rob <[email protected]> wrote: > Hi Everyone > > When offsetting sections taken from a polysurface (open or closed) of > more than 4 sides using the offset component I'm getting unpredictable > results (think articulated facade). Using a slider to set the > distance, some crvs will offset in, other will offset out. It > obviously changes at where the number of faces being sectioned does. > See posted files: offset test.ghx and offset test brep.3dm. > > The normals are all the same, but it seems to begin with the > surfaces. Perhaps there is a work around with the curves or does > anyone no what's going on with the surfaces? > > thanks a million > rob
