How can I get all the holes in a Part/Assembly ?

[Anonymous]

There are many ways in which a hole can be created.

Obviously the right way is to created it by using Hole feature.

The other ways are by using Extrusion, Sweep, Loft , Revolve etc.

My objective is to get all the holes irrespective of how it is created.

Pl guide if any buddy has any idea?

[YuhanZhang · Accepted solution]

My idea is that you can traverse over all the faces and find out how many cylindrical faces, and also check if the cylindrical faces have their normal pointing to their axis(inner cylindrical faces) or not(outter cylindrical faces). The inner cylindrical faces are the holes you want to get.

[Anonymous]

Thanks

The other thing I want to check is whether it is a flat bottom or conical.

How can we get the bottom face for the cylinder?

[Ralf_Krieg]

Hello

Each of your cylindrical face has a CreatedByFeature-Object. This object has a Faces-Object. The one face is your cylindrical face and the other is the bottom face. The SurfaceType of this face could be kPlaneSurface or kConeSurface. If the Faces-Object has only one face, your hole is through the whole part.

[Anonymous]

Thanks krieq

Its working now.

Thanks a lot

[Gabriel_Watson]

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@YuhanZhang wrote:

My idea is that you can traverse over all the faces and find out how many cylindrical faces, and also check if the cylindrical faces have their normal pointing to their axis(inner cylindrical faces) or not(outter cylindrical faces). The inner cylindrical faces are the holes you want to get.

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I am trying to test faces to find if they are holes or cylinders, but I found almost no reference on how to do this. Please help if you can. Below is what my intent is, but not how the code should be written:

If oFace.Normal = oFace.Geometry.AxisVector Then MsgBox("Cylinder is a hole.")