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# coding: UTF-8
# Copyright 2009, 2010 Thomas Jourdan
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import ka_utils
import model_random
import model_locus
import model_allele
import model_constraintpool
from gettext import gettext as _
X_TILES_CONSTRAINT = 'xtilesconstraint'
Y_TILES_CONSTRAINT = 'ytilesconstraint'
class RectilinearGridSampler(model_allele.Allele):
"""RectilinearGridSampler: Reverse the layer horizontally or vertically.
inv: self.x_tiles > 0
inv: self.y_tiles > 0
"""
cdef = [{'bind' : X_TILES_CONSTRAINT,
'name' : 'Number of rectilinear tiles in x direction',
'domain': model_constraintpool.INT_RANGE,
'min' : 1, 'max': 24},
{'bind' : Y_TILES_CONSTRAINT,
'name' : 'Number of rectilinear tiles in y direction',
'domain': model_constraintpool.INT_RANGE,
'min' : 1, 'max': 24},
]
def __init__(self, trunk):
"""Constructor for a flip merger."""
super(RectilinearGridSampler, self).__init__(trunk)
self.x_tiles = 1
self.y_tiles = 1
def __eq__(self, other):
"""Equality based on fliping horizontally or vertically."""
equal = isinstance(other, RectilinearGridSampler) \
and self.x_tiles == other.x_tiles \
and self.y_tiles == other.y_tiles
return equal
def randomize(self):
"""Randomizes the number of tiles."""
cpool = model_constraintpool.ConstraintPool.get_pool()
x_tiles_constraint = cpool.get(self, X_TILES_CONSTRAINT)
self.x_tiles = model_random.randint_constrained(x_tiles_constraint)
y_tiles_constraint = cpool.get(self, Y_TILES_CONSTRAINT)
self.y_tiles = model_random.randint_constrained(y_tiles_constraint)
def mutate(self):
"""Mutates the number of tiles."""
cpool = model_constraintpool.ConstraintPool.get_pool()
if model_random.is_mutating():
x_tiles_constraint = cpool.get(self, X_TILES_CONSTRAINT)
self.x_tiles = model_random.jitter_discret_constrained(self.x_tiles,
x_tiles_constraint)
if model_random.is_mutating():
y_tiles_constraint = cpool.get(self, Y_TILES_CONSTRAINT)
self.y_tiles = model_random.jitter_discret_constrained(self.y_tiles,
y_tiles_constraint)
def swap_places(self):
"""Exchange x- and y-tiles."""
self.x_tiles, self.y_tiles = model_random.swap_parameters(self.x_tiles,
self.y_tiles)
def crossingover(self, other):
"""
pre: isinstance(other, RectilinearGridSampler)
pre: isinstance(self, RectilinearGridSampler)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
post: __return__ is not other
post: model_locus.unique_check(__return__, self, other) == ''
"""
new_one = RectilinearGridSampler(self.get_trunk())
cross_sequence = model_random.crossing_sequence(2)
new_one.x_tiles = self.x_tiles if cross_sequence[0] else other.x_tiles
new_one.y_tiles = self.y_tiles if cross_sequence[1] else other.y_tiles
return new_one
def get_sample_points(self):
""" Produces a list of sampling points.
"""
sample_points = []
dx, dy = 1.0 / self.x_tiles, 1.0 / self.y_tiles
for tx in range(self.x_tiles):
xp = dx*(tx+0.5)
for ty in range(self.y_tiles):
sample_points.append( (xp-0.5, dy*(ty+0.5)-0.5) )
return sample_points
def get_sample_extent(self):
"""'Size' of one sample as a fraction of 1.
"""
return 1.0/self.x_tiles, 1.0/self.y_tiles
def explain(self):
"""
post: len(__return__) == 3
"""
head = _('Rectilinear grid sampler: %(x_tiles)d*x, %(y_tiles)d*y') \
% {'x_tiles': self.x_tiles, 'y_tiles': self.y_tiles}
return ka_utils.explain_points(head, self.get_sample_points())
def copy(self):
"""A copy constructor.
post: isinstance(__return__, RectilinearGridSampler)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = RectilinearGridSampler(self.get_trunk())
new_one.x_tiles = self.x_tiles
new_one.y_tiles = self.y_tiles
return new_one
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