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rhino:booleanfaq [2020/08/14]
127.0.0.1 external edit 		rhino:booleanfaq [2022/03/02]
mitch_heynick [Known Rhino limitations]
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 **Coincident seams** – All objects have seams. Sometimes when the seams on two objects are at exactly the same place, Rhino has trouble with the intersection.  Solution: Either try to move the seam, or try moving one object just a tiny, tiny bit (if you can without making your model inaccurate).  Or try to do the operation manually. **Coincident seams** – All objects have seams. Sometimes when the seams on two objects are at exactly the same place, Rhino has trouble with the intersection.  Solution: Either try to move the seam, or try moving one object just a tiny, tiny bit (if you can without making your model inaccurate).  Or try to do the operation manually.
  
-**Coplanar faces</color** – If two faces of an object are on the same plane, Rhino may not be able to calculate the intersection. This is a fairly  common occurrence. Avoid building your model this way if you can.  Solution: As above, you may move the object slightly if possible. If not, you may have to do this operation manually.+**Coplanar faces** – If two faces of an object are on the same plane, Rhino may not be able to calculate the intersection. This is a fairly  common occurrence. Later versions of Rhino are much better at resolving these situations, but they may still occasionally fail. Solution: As above, you may move the object slightly if possible. If not, you may have to do this operation manually.
  
 **Nearly tangent surfaces** – Like the intersection of two equal diameter pipes at an angle.  The intersection often fails at the point where the surfaces are tangent.  Currently, there is no easy fix for this problem. **Nearly tangent surfaces** – Like the intersection of two equal diameter pipes at an angle.  The intersection often fails at the point where the surfaces are tangent.  Currently, there is no easy fix for this problem.
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 **Invalid objects** – If one of the objects you're trying to work with is invalid, Boolean operations will often fail.  Check for invalid objects by using the command **SelBadObjects**.  If one highlights, you need to fix it first before proceeding.  It is also recommended that you turn on automatic object checking. If invalid objects are created in the course of your work (or imported), Rhino will tell you immediately.  To do this, simply type **CheckNewObjects**.  This is a toggle, running the command again turns it off. **Invalid objects** – If one of the objects you're trying to work with is invalid, Boolean operations will often fail.  Check for invalid objects by using the command **SelBadObjects**.  If one highlights, you need to fix it first before proceeding.  It is also recommended that you turn on automatic object checking. If invalid objects are created in the course of your work (or imported), Rhino will tell you immediately.  To do this, simply type **CheckNewObjects**.  This is a toggle, running the command again turns it off.
  
-**Non-manifold polysurfaces** – Although Rhino doesn't currently flag these objects as bad, they can cause failure.  Rhino //shouldn't// create these types of structures, but under certain conditions it does, especially with V4.  The only way to find them currently is to check the properties of the object.+**Non-manifold polysurfaces** – Although Rhino doesn't currently flag these objects as bad, they can cause failure.  Rhino //shouldn't// create these types of structures, but under certain conditions it does.  The Properties/Details of an object will indicate if it is non-manifold, and you can use the edge analysis tool to highlight them.
  
 =====Manual construction and editing is sometimes needed===== =====Manual construction and editing is sometimes needed=====
rhino/booleanfaq.txt · Last modified: 2023/11/19 by mitch_heynick

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