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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
from gettext import gettext as _
import math
import model_random
import model_locus
import model_allele
import model_constraintpool
import random
import cairo
ORDER_CONSTRAINT = 'orderconstaint'
RADIUS_CONSTRAINT = 'radiusconstraint'
SCATTER_CONSTRAINT = 'scatterconstraint'
LINE_WIDTH_CONSTRAINT = 'linewidthconstraint'
START_ANGLE_CONSTRAINT = 'startangleconstraint'
class StarStamp(model_allele.Allele):
"""StarStamp:.
inv: self.radius >= 0.0
inv: self.scatter >= 0.0
"""
cdef = [{'bind' : ORDER_CONSTRAINT,
'name' : 'Number of rays',
'domain': model_constraintpool.INT_RANGE,
'min' : 3, 'max': 17},
{'bind' : RADIUS_CONSTRAINT,
'name' : 'Radius of the star',
'domain': model_constraintpool.FLOAT_RANGE,
'min' : 0.01, 'max': 0.33},
{'bind' : SCATTER_CONSTRAINT,
'name' : 'Scattering the rays length',
'domain': model_constraintpool.FLOAT_RANGE,
'min' : 0.01, 'max': 0.99},
{'bind' : START_ANGLE_CONSTRAINT,
'name' : 'Rotation of the stamp',
'domain': model_constraintpool.FLOAT_RANGE,
'min' : -math.pi, 'max': math.pi},
{'bind' : LINE_WIDTH_CONSTRAINT,
'name' : 'Line width of the rays',
'domain': model_constraintpool.FLOAT_RANGE,
'min' : 0.001, 'max': 0.025},
]
def __init__(self, trunk, dummy):
"""Constructor for a star stamp."""
super(StarStamp, self).__init__(trunk)
self.order = 1
self.radius = 0.1
self.scatter = 0.1
self.start_angle = 0.0
self.line_width = 0.025
self.random_seed = 1512
def __eq__(self, other):
"""Equality based on radius."""
equal = isinstance(other, StarStamp) \
and self.order == other.order \
and self.radius == other.radius \
and self.scatter == other.scatter \
and self.start_angle == other.start_angle \
and self.line_width == other.line_width \
and self.random_seed == other.random_seed
return equal
def randomize(self):
"""Randomize the layers components."""
cpool = model_constraintpool.ConstraintPool.get_pool()
order_constraint = cpool.get(self, ORDER_CONSTRAINT)
self.order = model_random.randint_constrained(order_constraint)
radius_constraint = cpool.get(self, RADIUS_CONSTRAINT)
self.radius = model_random.uniform_constrained(radius_constraint)
scatter_constraint = cpool.get(self, SCATTER_CONSTRAINT)
self.scatter = model_random.uniform_constrained(scatter_constraint)
start_angle_constraint = cpool.get(self, START_ANGLE_CONSTRAINT)
self.start_angle = model_random.uniform_constrained(start_angle_constraint)
line_width_constraint = cpool.get(self, LINE_WIDTH_CONSTRAINT)
self.line_width = model_random.uniform_constrained(line_width_constraint)
self.random_seed = random.randint(1, 65535)
def mutate(self):
"""Make small random changes to the layers components."""
cpool = model_constraintpool.ConstraintPool.get_pool()
order_constraint = cpool.get(self, ORDER_CONSTRAINT)
self.order = model_random.jitter_discret_constrained(self.order, order_constraint)
radius_constraint = cpool.get(self, RADIUS_CONSTRAINT)
self.radius = model_random.jitter_constrained(self.radius, radius_constraint)
scatter_constraint = cpool.get(self, SCATTER_CONSTRAINT)
self.scatter = model_random.jitter_constrained(self.scatter, scatter_constraint)
start_angle_constraint = cpool.get(self, START_ANGLE_CONSTRAINT)
self.start_angle = model_random.jitter_constrained(self.start_angle, start_angle_constraint)
line_width_constraint = cpool.get(self, LINE_WIDTH_CONSTRAINT)
self.line_width = model_random.jitter_constrained(self.line_width, line_width_constraint)
def swap_places(self):
"""Nothing to do."""
def crossingover(self, other):
"""
pre: isinstance(other, StarStamp)
pre: isinstance(self, StarStamp)
# 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 = StarStamp(self.get_trunk(), -1)
cross_sequence = model_random.crossing_sequence(6)
new_one.order = self.order if cross_sequence[0] else other.order
new_one.radius = self.radius if cross_sequence[1] else other.radius
new_one.scatter = self.scatter if cross_sequence[2] else other.scatter
new_one.start_angle = self.start_angle if cross_sequence[3] else other.start_angle
new_one.line_width = self.line_width if cross_sequence[4] else other.line_width
new_one.random_seed = self.random_seed \
if cross_sequence[5] else other.random_seed
return new_one
def set_stamp_extent(self, width, height):
"""Set extent of stamp. This stamps will ignore these parameters."""
pass
def render(self, ctx, point, state):
"""
pre: ctx is not None
pre: len(point) == 2
"""
ctx.set_line_width(self.line_width)
factor = 2.0 * math.pi / float(self.order)
rale = random.Random()
# rale.seed(self.order+100*self.line_width+100*self.start_angle)
rale.seed(state+self.random_seed)
line_cap = ctx.get_line_cap()
if self.line_width > 0.005:
ctx.set_line_cap(cairo.LINE_CAP_ROUND)
min_jitter, max_jitter = 1.0-self.scatter, 1.0+self.scatter
centre_x, centre_y = point[0], point[1]
for step in xrange(self.order + 1):
angle = factor * step + self.start_angle
jittered_radius = self.radius * rale.uniform(min_jitter, max_jitter)
ctx.move_to(centre_x, centre_y)
ctx.line_to(centre_x + jittered_radius * math.cos(angle),
centre_y + jittered_radius * math.sin(angle))
ctx.stroke()
ctx.set_line_cap(line_cap)
def explain(self):
"""
post: len(__return__) == 3
"""
str_start_angle = _('start angle: %4.3f') % self.start_angle
str_line_width = _('line width: %4.3f') % self.line_width
return _('Star stamp: number of rays: ') + str(self.order) \
+ ', ' + str_line_width \
+ ', ' + str_start_angle , \
None, \
None
def copy(self):
"""A copy constructor.
post: isinstance(__return__, StarStamp)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = StarStamp(self.get_trunk(), -1)
new_one.order = self.order
new_one.radius = self.radius
new_one.scatter = self.scatter
new_one.line_width = self.line_width
new_one.start_angle = self.start_angle
new_one.random_seed = self.random_seed
return new_one
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