clump_s (<point>,<num>)
filter
The filter of all entities which lie totally within a 3-D sphere.
<point>
Center of the sphere, a 3-D point.
<num>
Radius of the sphere 
 in modelling units.
Create a group containing all entities which lie within a sphere.
group sphere_ents = clump_s(p0,500)
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 Commands:  | 
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 Functions:  | 
 clash_s (filter), clump_b (filter), clump_c (filter), clump_e (filter), clump_p (filter), clump_r (filter), clump_w (filter)  | 
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 Identifiers:  | 
 ignore_node_size (numeric)  |