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IMP Reference Guide  develop.879b8d2544,2020/09/29
The Integrative Modeling Platform
algebra/grid_space.py

This example shows how to use the grid support in IMP.algebra to discretize a set of continuous points. In this case the points are simply randomly drawn from the surface of a sphere, but they could be taken from something more interesting.

1 ## \example algebra/grid_space.py
2 # This example shows how to use the grid support in IMP.algebra to
3 # discretize a set of continuous points. In this case the points are
4 # simply randomly drawn from the surface of a sphere, but they could be
5 # taken from something more interesting.
6 
7 from __future__ import print_function
8 import IMP.algebra
9 import sys
10 
11 IMP.setup_from_argv(sys.argv, "grid space")
12 
13 # create a unit grid with its origin at 0,0,0
15 
17 count = 0
18 for i in range(0, 100):
20  ei = g.get_extended_index(p)
21  if g.get_has_index(ei):
22  print("hit")
23  else:
24  g.add_voxel(ei, count)
25  count += 1
26 
27 in_count = 0
28 for i in g.get_extended_indexes(IMP.algebra.get_bounding_box(s)):
29  if IMP.algebra.get_distance(s.get_center(), g.get_center(i)) > 6:
30  continue
31  if g.get_has_index(i):
32  print("hit")
33  else:
34  g.add_voxel(i, -1)
35  in_count += 1
36 
37 print("There are", len(g.get_all_indexes()), "distinct values", count, in_count)