Newer
Older
####################################################################################################
#
# Patro - A Python library to make patterns for fashion design
# Copyright (C) 2017 Fabrice Salvaire
#
# 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, see <http://www.gnu.org/licenses/>.
#
####################################################################################################
"""This module defines all the calculations supported by the pattern engine, e.g. the intersection
between two lines.
A calculation must be build from the corresponding method of the Pattern class.
####################################################################################################
import logging
from Patro.GeometryEngine.Bezier import CubicBezier2D
from Patro.GeometryEngine.Line import Line2D
from Patro.GeometryEngine.Segment import Segment2D
from Patro.GeometryEngine.Vector import Vector2D
from .Calculator import Expression
####################################################################################################
_module_logger = logging.getLogger(__name__)
####################################################################################################
def quote(x):
return "'{}'".format(x)
####################################################################################################
### class CalculationMetaClass:
###
### _logger = _module_logger.getChild('CalculationMetaClass')
###
### ##############################################
###
### def __init__(cls, class_name, super_classes, class_attribute_dict):
### # cls._logger.info(str((cls, class_name, super_classes, class_attribute_dict)))
### type.__init__(cls, class_name, super_classes, class_attribute_dict)
####################################################################################################
# metaclass = CalculationMetaClass
class Calculation():
_logger = _module_logger.getChild('Calculation')
##############################################
self._pattern = pattern
# Valentina set an incremental integer id for each calculation (entity)
# A calculation which generate a point has also a name
if id is None:
self._id = pattern.get_calculation_id()
else:
if pattern.has_calculation_id(id):
raise NameError("calculation id {} is already attributed".format(id))
else:
self._id = id
self._dag_node = self._dag.add_node(pyid(self), data=self)
##############################################
@property
def id(self):
return self._id
@property
def pattern(self):
return self._pattern
@property
def _dag(self):
return self._pattern.calculator.dag
@property
def dependencies(self):
return self._dependencies
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._id}'.format(self)
##############################################
def __int__(self):
return self._id
##############################################
def _get_calculation(self, calculation):
"""Return the corresponding :obj:`Calculation` object where *calculation* can be
:obj:`Calculation` instance, an id or a name.
"""
if isinstance(calculation, Calculation):
return calculation
# elif isinstance(calculation, (int, str)):
return self._pattern.get_calculation(calculation)
##############################################
def eval(self):
self._logger.info('Eval {}'.format(self))
self.eval_internal()
##############################################
def eval_internal(self):
"""Code to evaluate the calculation in subclasses, i.e. to compute internal states like points."""
##############################################
def _init_args(self):
# cf. to_python
args = self.__init__.__code__.co_varnames
args = args[2:-1] # remove self, pattern, id
return args
##############################################
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
args = self._init_args()
values = []
for arg in args:
value = getattr(self, arg)
# if arg == 'pattern':
# value_str = 'pattern'
# if isinstance(value, Pattern):
# value_str = 'pattern'
if value is None:
value_str = 'None'
elif isinstance(value, (int, float)):
value_str = str(value)
elif isinstance(value, str):
value_str = quote(value)
# elif isinstance(value, Calculation):
# value_str = str(value.id)
elif isinstance(value, Point):
value_str = quote(value.name)
elif isinstance(value, Expression):
if value.is_float():
value_str = str(value)
else:
value_str = quote(value)
elif isinstance(value, Vector2D):
value_str = 'Vector2D({0.x}, {0.y})'.format(value)
else:
value_str = ''
values.append(value_str)
kwargs = ', '.join(['pattern'] + [key + '=' + value for key, value in zip(args, values)])
return self.__class__.__name__ + '(' + kwargs + ')'
##############################################
dag = self._dag
for point in points:
self._dependencies.add(point)
self._dag_node.connect_ancestor(dag[pyid(point)])
##############################################
# def _connect_ancestor_for_expressions(self, *expressions):
# for expression in expressions:
# self._connect_ancestor(*expression.dependencies)
def _iter_on_expressions(self):
"""Lookup for :obj:`Expression` in the object and yield them."""
for attribute in self.__dict__.values():
if isinstance(attribute, Expression):
yield attribute
def connect_ancestor_for_expressions(self):
# Expression's dependencies are only known after compilation
for expression in self._iter_on_expressions():
self._connect_ancestor(*expression.dependencies)
##############################################
# @property
def geometry(self):
raise NotImplementedError('Geometry is not implemented for {}'.format(self))
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
####################################################################################################
class LinePropertiesMixin:
##############################################
def __init__(self, line_style, line_color):
self._line_color = line_color
self._line_style = line_style
##############################################
@property
def line_color(self):
return self._line_color
@line_color.setter
def line_color(self, value):
self._line_color = value
@property
def line_style(self):
return self._line_style
@line_style.setter
def line_style(self, value):
self._line_style = value
####################################################################################################
class FirstSecondPointMixin:
##############################################
def __init__(self, first_point, second_point):
self._first_point = self._get_calculation(first_point)
self._second_point = self._get_calculation(second_point)
self._connect_ancestor(self._first_point, self._second_point)
##############################################
@property
def first_point(self):
return self._first_point
@property
def second_point(self):
return self._second_point
####################################################################################################
class BasePointMixin:
##############################################
def __init__(self, base_point):
self._base_point = self._get_calculation(base_point)
##############################################
@property
def base_point(self):
return self._base_point
####################################################################################################
class LengthMixin:
##############################################
def __init__(self, length):
self._length = Expression(length, self._pattern.calculator)
# self._connect_ancestor_for_expressions(self._length)
##############################################
@property
def length(self):
return self._length
####################################################################################################
class AngleMixin:
##############################################
def __init__(self, angle):
self._angle = Expression(angle, self._pattern.calculator)
# self._connect_ancestor_for_expressions(self._angle)
##############################################
@property
def angle(self):
return self._angle
####################################################################################################
class LengthAngleMixin(LengthMixin, AngleMixin):
##############################################
def __init__(self, length, angle):
LengthMixin.__init__(self, length)
AngleMixin.__init__(self, angle)
####################################################################################################
class Point(Calculation):
##############################################
def __init__(self, pattern, name, label_offset, id=None):
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
Calculation.__init__(self, pattern, id)
self._name = name
self._label_offset = label_offset
self._vector = None
##############################################
@property
def name(self):
return self._name
@property
def label_offset(self):
return self._label_offset
@property
def vector(self):
return self._vector
##############################################
def _post_eval_internal(self):
self._logger.info('{0._name} {0._vector}'.format(self))
##############################################
def geometry(self):
return self._vector.clone()
####################################################################################################
class SinglePoint(Point):
##############################################
x, y,
label_offset,
Point.__init__(self, pattern, name, label_offset, id)
self._x = Expression(x, pattern.calculator)
self._y = Expression(y, pattern.calculator)
# self._connect_ancestor_for_expressions(self._x, self._y)
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
##############################################
@property
def x(self):
return self._x
@property
def y(self):
return self._y
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._x}, {0._y})'.format(self)
##############################################
def eval_internal(self):
self._vector = Vector2D(self._x.value, self._y.value)
self._post_eval_internal()
####################################################################################################
class AlongLinePoint(Point, LinePropertiesMixin, FirstSecondPointMixin, LengthMixin):
"""Construct a point from two points defining a direction and a length"""
##############################################
first_point, second_point, length,
label_offset,
line_style=None, line_color=None,
Point.__init__(self, pattern, name, label_offset, id)
LinePropertiesMixin.__init__(self, line_style, line_color)
FirstSecondPointMixin.__init__(self, first_point, second_point)
LengthMixin.__init__(self, length)
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._first_point.name}, {0._second_point.name}, {0._length})'.format(self)
##############################################
def eval_internal(self):
vector = self._second_point.vector - self._first_point.vector
self._pattern.calculator.set_current_segment(vector)
self._vector = self._first_point.vector + vector.to_normalised()*self._length.value
self._pattern.calculator.unset_current_segment()
self._post_eval_internal()
####################################################################################################
class EndLinePoint(Point, LinePropertiesMixin, BasePointMixin, LengthAngleMixin):
"""Construct a point from a base point and a vector defined by an angle and a length"""
##############################################
base_point, angle, length,
label_offset,
line_style=None, line_color=None,
Point.__init__(self, pattern, name, label_offset, id)
LinePropertiesMixin.__init__(self, line_style, line_color)
BasePointMixin.__init__(self, base_point)
LengthAngleMixin.__init__(self, length, angle)
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._base_point.name}, {0._angle}, {0._length})'.format(self)
##############################################
def eval_internal(self):
self._vector = self._base_point._vector + Vector2D.from_angle(self._angle.value)*self._length.value
self._post_eval_internal()
####################################################################################################
class LineIntersectPoint(Point):
"""Construct a point from the intersection of two segments defined by four points"""
##############################################
point1_line1, point2_line1, point1_line2, point2_line2,
label_offset,
Point.__init__(self, pattern, name, label_offset, id)
self._point1_line1 = self._get_calculation(point1_line1)
self._point2_line1 = self._get_calculation(point2_line1)
self._point1_line2 = self._get_calculation(point1_line2)
self._point2_line2 = self._get_calculation(point2_line2)
self._connect_ancestor(self._point1_line1, self._point2_line1,
self._point1_line2, self._point2_line2)
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
##############################################
@property
def point1_line1(self):
return self._point1_line1
@property
def point2_line1(self):
return self._point2_line1
@property
def point1_line2(self):
return self._point1_line2
@property
def point2_line2(self):
return self._point2_line2
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._point1_line1.name}, {0._point2_line1.name}, {0._point1_line2.name}, {0._point2_line2.name})'.format(self)
##############################################
def eval_internal(self):
line1 = Line2D.from_two_points(self._point1_line1.vector, self._point2_line1.vector)
line2 = Line2D.from_two_points(self._point1_line2.vector, self._point2_line2.vector)
self._vector = line1.intersection(line2)
self._post_eval_internal()
####################################################################################################
class NormalPoint(Point, LinePropertiesMixin, FirstSecondPointMixin, LengthAngleMixin):
"""Construct a point at a distance of the first point on the rotated normal of a line defined by two points"""
##############################################
first_point, second_point, angle, length,
label_offset,
line_style=None, line_color=None,
Point.__init__(self, pattern, name, label_offset, id)
LinePropertiesMixin.__init__(self, line_style, line_color)
FirstSecondPointMixin.__init__(self, first_point, second_point)
LengthAngleMixin.__init__(self, length, angle)
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._first_point.name}, {0._second_point.name}, {0._angle}, {0._length})'.format(self)
##############################################
def eval_internal(self):
vector = self._second_point.vector - self._first_point.vector
self._pattern.calculator.set_current_segment(vector)
direction = vector.to_normalised()
angle = self._angle.value
if angle:
self._vector = self._first_point.vector + direction*self._length.value
self._pattern.calculator.unset_current_segment()
self._post_eval_internal()
####################################################################################################
class PointOfIntersection(Point, FirstSecondPointMixin):
"""Construct a point from the x coordinate of a fist point and the y coordinate of a second point"""
##############################################
first_point, second_point,
label_offset,
Point.__init__(self, pattern, name, label_offset, id)
FirstSecondPointMixin.__init__(self, first_point, second_point)
##############################################
def __repr__(self):
return self.__class__.__name__ + ' {0._name} = ({0._first_point.name}, {0._second_point.name})'.format(self)
##############################################
def eval_internal(self):
self._vector = Vector2D(self._first_point.vector.x, self._second_point.vector.y)
self._post_eval_internal()
####################################################################################################
class Line(Calculation, LinePropertiesMixin, FirstSecondPointMixin):
##############################################
first_point, second_point,
line_style='solid', line_color='black',
id=None,
):
Calculation.__init__(self, pattern, id)
LinePropertiesMixin.__init__(self, line_style, line_color)
FirstSecondPointMixin.__init__(self, first_point, second_point)
##############################################
def __repr__(self):
return self.__class__.__name__ + ' ({0._first_point.name}, {0._second_point.name})'.format(self)
##############################################
def eval_internal(self):
pass
##############################################
def geometry(self):
return Segment2D(self._first_point.vector, self._second_point.vector)
####################################################################################################
class SimpleInteractiveSpline(Calculation, LinePropertiesMixin, FirstSecondPointMixin):
""""Construct a quadratic Bezier curve from two extremity points and two control points"""
##############################################
first_point, second_point,
angle1, length1,
angle2, length2,
line_style='solid', line_color='black',
id=None,
):
Calculation.__init__(self, pattern, id)
LinePropertiesMixin.__init__(self, line_style, line_color)
FirstSecondPointMixin.__init__(self, first_point, second_point)
self._angle1 = Expression(angle1, pattern.calculator)
self._length1 = Expression(length1, pattern.calculator)
self._angle2 = Expression(angle2, pattern.calculator)
self._length2 = Expression(length2, pattern.calculator)
# self._connect_ancestor_for_expressions(self._angle1, self._length1, self._angle2, self._length2)
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
self._control_point1 = None # Fixme: not yet computed
self._control_point2 = None
##############################################
@property
def angle1(self):
return self._angle1
@property
def length1(self):
return self._length1
@property
def angle2(self):
return self._angle2
@property
def length2(self):
return self._length2
@property
def control_point1(self):
return self._control_point1
@property
def control_point2(self):
return self._control_point2
##############################################
def __repr__(self):
return self.__class__.__name__ + ' ({0._first_point.name}, {0._second_point.name}, {0._angle1}, {0._length1}, {0._angle2}, {0._length2})'.format(self)
##############################################
def eval_internal(self):
control_point1_offset = Vector2D.from_angle(self._angle1.value)*self._length1.value
control_point2_offset = Vector2D.from_angle(self._angle2.value)*self._length2.value
self._control_point1 = self.first_point.vector + control_point1_offset
self._control_point2 = self.second_point.vector + control_point2_offset
# self._logger.info("Control points : {} {}".format(self._control_point1, self._control_point2))
##############################################
def geometry(self):
if self._control_point1 is None:
raise NameError("eval before to get geometry")
return CubicBezier2D(self._first_point.vector, self._control_point1,
self._control_point2, self._second_point.vector)