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# Copyright 2004-2007 Nanorex, Inc. See LICENSE file for details.
"""
Slab.py - a slab in space, with a 3d-point-in-slab test
@author: not sure; could be found from svn/cvs annotate
@version: $Id$
@copyright: 2004-2007 Nanorex, Inc. See LICENSE file for details.
Module classification: geometry
Note: bruce 071215 split class Slab our of shape.py into its own module.
"""
from Numeric import dot
from geometry.VQT import norm
class Slab:
"""
defines a slab in space which can tell you if a point is in the slab
"""
def __init__(self, point, normal, thickness):
self.point = point
self.normal = norm(normal)
self.thickness = thickness
def isin(self, point):
d = dot(point - self.point, self.normal)
return d >= 0 and d <= self.thickness
def __str__(self):
return '<slab of '+`self.thickness`+' at '+`self.point`+'>'
pass
# end
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