Get all Shells/Faces/Edges/Vertices at a particular point in 3D space

[mntruell]

Using Python, is there a way to look up all objects (shells/faces/edges/vertices) in a body that intersect with a particular point in 3D space?

For example, imagine my body is a cube occupying [0, 1]x[0, 1]x[0, 1]. Given the point (0, 0, 0.5), I'd like to get the Python edge from (0, 0, 0) to (0, 0, 1). Given the point (0, 0.5, 0.5), I'd like to get the face on the YZ-plane in Python.

[Roy_043]

Code: Select all

doc = App.ActiveDocument
box = doc.addObject("Part::Box", "Box")
doc.recompute()
point = App.Vector(5, 0, 5)
distance, points, info = box.Shape.distToShape(Part.Vertex(point))
print(info)

[mntruell]

What is the structure of info?

[Roy_043]

Code: Select all

[('Face', 2, (5.0, 5.0), 'Vertex', 0, None)]:
'Face' = subelement
2 = index of subelement (zero-based)
(5.0, 5.0) = (u, v) parameters of the point.

[mntruell]

Fantastic. Thank you!

[mntruell]

How do I evaluate the subelement at the supplied parameters?

[edwilliams16]

Code: Select all

face = box.Shape.Faces[2]
print(face.valueAt(5,5)) #-> Vector (5.0, 0.0, 5.0)
face.Surface.normal(5,5)# normal at location etc.

[mntruell]

How do I transform the result of valueAt into a correct 3D point? I'm trying to use it to produce a point cloud of a BREP, but it is giving incorrect results.

[onekk]

How do I transform the result of valueAt into a correct 3D point? I'm trying to use it to produce a point cloud of a BREP, but it is giving incorrect results.

valeAt is returning a Vector() and usually a Vector() will suffice to feed many methods that uses "3d Points" like lines and other entities. In other word where you have to use the returned info?

Regards

Carlo D.