I want to approach two vertex groups belonging to two different objects, making sure that these objects are close together. How can I do that scripting?

Thank you so much!


1 Answer 1


Given an object ob, you can access its mesh at ob.data, and its vertices at ob.data.vertices. The vertex groups are defined on the object as well, at ob.vertex_groups. Each vertex group has a weight() function you can call to get the weight of a vertex.

vg0 = ob.vertex_groups[0]
for index, vertex in enumerate(ob.data.vertices):
        weight = vg0.weight(index)
    except RuntimeError:
        # Raised when the vertex is not part of the group
        weight = 0.0

    print('Vertex #%d at %s has weight %f' % (index, vertex.co, weight))

For efficient distance queries (from a point in space to a mesh) you can use the BVHTree module. This may work faster than trying to compute the distance between every point of one mesh to every other point on the other.

  • $\begingroup$ Good catch, I updated the code. $\endgroup$
    – dr. Sybren
    Commented Jun 27, 2018 at 9:52
  • 1
    $\begingroup$ Lightspeed updating! $\endgroup$
    – aliasguru
    Commented Jun 27, 2018 at 9:53
  • $\begingroup$ uhmmm, sorry, i want to put very close my objects basing on their 2 vertex groups... why do we consider the weight? $\endgroup$ Commented Jun 27, 2018 at 11:19
  • $\begingroup$ The code can be used to detect whether a vertex is in the vertex group (use the exception) or you can use the weight itself somehow. The exact use is up to you. $\endgroup$
    – dr. Sybren
    Commented Jun 27, 2018 at 14:52

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