Picking Vertical Faces

[medeek]

I thought the API has a built in detection for rounding off floats, or some sort of tolerance, correct me if I’m wrong.

I’m trying to take a collection of faces and eliminate the vertical faces:

@roof_faces = @all_roof_faces.find_all {|f| f.normal.z != 0.0 }

This sort of works but the results are unpredictable.

[medeek]

This seems to work:

@roof_faces = @all_roof_faces.find_all {|f| f.normal.z.round(3) != 0.0 }

[DanRathbun]

@medeek

I’m trying to take a collection of faces and eliminate the vertical faces:

@roof_faces = @all_roof_faces.find_all {|f| f.normal.z != 0.0 }

Try …

@roof_faces = @all_roof_faces.reject {|f| f.normal.perpendicular?(Z_AXIS) }

---

@medeek

I thought the API has a built in detection for rounding off floats, correct me if I’m wrong.

You’re wrong. It’s Core Ruby that has this functionality.

Class: Float (Ruby 2.5.5)

[medeek]

That is the cleaner way to handle the task.

[tt_su]

@medeek

I thought the API has a built in detection for rounding off floats, or some sort of tolerance, correct me if I’m wrong.

The Length class compares with the tolerance SketchUp use for length units. But if you have a Float you need to perform this yourself.

In the example you provide you are dealing with geometric coordiantes so it’d be appropriate to ensure you use Lengths:

@roof_faces = @all_roof_faces.find_all {|f| f.normal.z.to_l != 0.to_l }