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import math
from dataclasses import dataclass, replace
from aperture_macros.parse import GenericMacros
import graphic_primitives as gp
def _flash_hole(self, x, y):
if self.hole_rect_h is not None:
return self.primitives(x, y), Rectangle((x, y), (self.hole_dia, self.hole_rect_h), rotation=self.rotation, polarity_dark=False)
else:
return self.primitives(x, y), Circle((x, y), self.hole_dia, polarity_dark=False)
class Aperture:
@property
def hole_shape(self):
if self.hole_rect_h is not None:
return 'rect'
else:
return 'circle'
@property
def hole_size(self):
return (self.hole_dia, self.hole_rect_h)
@property
def params(self):
return dataclasses.astuple(self)
def flash(self, x, y):
return self.primitives(x, y)
@parameter
def equivalent_width(self):
raise ValueError('Non-circular aperture used in interpolation statement, line width is not properly defined.')
def to_gerber(self):
# Hack: The standard aperture shapes C, R, O do not have a rotation parameter. To make this API easier to use,
# we emulate this parameter. Our circle, rectangle and oblong classes below have a rotation parameter. Only at
# export time during to_gerber, this parameter is evaluated.
actual_inst = self._rotated()
params = 'X'.join(f'{par:.4}' for par in actual_inst.params)
return f'{actual_inst.aperture.gerber_shape_code},{params}'
def __eq__(self, other):
return hasattr(other, to_gerber) and self.to_gerber() == other.to_gerber()
def _rotate_hole_90(self):
if self.hole_rect_h is None:
return {'hole_dia': self.hole_dia, 'hole_rect_h': None}
else:
return {'hole_dia': self.hole_rect_h, 'hole_rect_h': self.hole_dia}
@dataclass(frozen=True)
class CircleAperture(Aperture):
gerber_shape_code = 'C'
human_readable_shape = 'circle'
diameter : float
hole_dia : float = 0
hole_rect_h : float = None
rotation : float = 0 # radians; for rectangular hole; see hack in Aperture.to_gerber
def primitives(self, x, y, rotation):
return [ gp.Circle(x, y, self.diameter/2) ]
def __str__(self):
return f'<circle aperture d={self.diameter:.3}>'
flash = _flash_hole
@parameter
def equivalent_width(self):
return self.diameter
def rotated(self):
if math.isclose(rotation % (2*math.pi), 0) or self.hole_rect_h is None:
return self
else:
return self.to_macro(self.rotation)
def to_macro(self):
return ApertureMacroInstance(GenericMacros.circle, *self.params)
@dataclass(frozen=True)
class RectangleAperture(Aperture):
gerber_shape_code = 'R'
human_readable_shape = 'rect'
w : float
h : float
hole_dia : float = 0
hole_rect_h : float = None
rotation : float = 0 # radians
def primitives(self, x, y):
return [ gp.Rectangle(x, y, self.w, self.h, rotation=self.rotation) ]
def __str__(self):
return f'<rect aperture {self.w:.3}x{self.h:.3}>'
flash = _flash_hole
@parameter
def equivalent_width(self):
return math.sqrt(self.w**2 + self.h**2)
def _rotated(self):
if math.isclose(self.rotation % math.pi, 0):
return self
elif math.isclose(self.rotation % math.pi, math.pi/2):
return replace(self, w=self.h, h=self.w, **self._rotate_hole_90())
else: # odd angle
return self.to_macro()
def to_macro(self):
return ApertureMacroInstance(GenericMacros.rect, *self.params)
@dataclass(frozen=True)
class ObroundAperture(Aperture):
gerber_shape_code = 'O'
human_readable_shape = 'obround'
w : float
h : float
hole_dia : float = 0
hole_rect_h : float = None
rotation : float = 0
def primitives(self, x, y):
return [ gp.Obround(x, y, self.w, self.h, rotation=self.rotation) ]
def __str__(self):
return f'<obround aperture {self.w:.3}x{self.h:.3}>'
flash = _flash_hole
def _rotated(self):
if math.isclose(self.rotation % math.pi, 0):
return self
elif math.isclose(self.rotation % math.pi, math.pi/2):
return replace(self, w=self.h, h=self.w, **self._rotate_hole_90())
else:
return self.to_macro()
def to_macro(self, rotation:'radians'=0):
# generic macro only supports w > h so flip x/y if h > w
inst = self if self.w > self.h else replace(self, w=self.h, h=self.w, **_rotate_hole_90(self))
return ApertureMacroInstance(GenericMacros.obround, *inst.params)
@dataclass(frozen=True)
class PolygonAperture(Aperture):
gerber_shape_code = 'P'
diameter : float
n_vertices : int
rotation : float = 0
hole_dia : float = 0
def primitives(self, x, y):
return [ gp.RegularPolygon(x, y, diameter, n_vertices, rotation=self.rotation) ]
def __str__(self):
return f'<{self.n_vertices}-gon aperture d={self.diameter:.3}'
flash = _flash_hole
def _rotated(self):
self.rotation %= (2*math.pi / self.n_vertices)
return self
def to_macro(self):
return ApertureMacroInstance(GenericMacros.polygon, *self.params)
class ApertureMacroInstance(Aperture):
params : [float]
rotation : float = 0
def __init__(self, macro, *parameters):
self.params = parameters
self._primitives = macro.to_graphic_primitives(parameters)
self.macro = macro
@property
def gerber_shape_code(self):
return self.macro.name
def primitives(self, x, y):
# FIXME return graphical primitives not macro primitives here
return [ primitive.with_offset(x, y).rotated(self.rotation, cx=0, cy=0) for primitive in self._primitives ]
def _rotated(self):
if math.isclose(self.rotation % (2*math.pi), 0):
return self
else:
return self.to_macro()
def to_macro(self):
return type(self)(self.macro.rotated(self.rotation), self.params)
def __eq__(self, other):
return hasattr(other, 'macro') and self.macro == other.macro and \
hasattr(other, 'params') and self.params == other.params and \
hasattr(other, 'rotation') and self.rotation == other.rotation
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