refactor as a package

sho/pb.py

@@ -0,0 +1,27 @@
+from . import distance
+
+########################################################################
+# Objective functions
+########################################################################
+
+def coverage(domain, sensors, sensor_range):
+    """Set a given domain's cells to on if they are visible
+    from one of the given sensors at the given sensor_range.
+
+    >>> coverage(np.zeros((5,5)),[(2,2)],2)
+    array([[ 0.,  0.,  0.,  0.,  0.],
+           [ 0.,  1.,  1.,  1.,  0.],
+           [ 0.,  1.,  1.,  1.,  0.],
+           [ 0.,  1.,  1.,  1.,  0.],
+           [ 0.,  0.,  0.,  0.,  0.]])
+    """
+    for py in range(len(domain)):
+        for px in range(len(domain[py])):
+            p = (px,py)
+            for x in sensors:
+                if distance(x,p) < sensor_range:
+                    domain[py][px] = 1
+                    break
+    return domain
+
+