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import graphic_primitives as gp
class GerberObject:
_ : KW_ONLY
polarity_dark : bool = True
def to_primitives(self):
raise NotImplementedError()
@dataclass
class Flash(GerberObject):
x : float
y : float
aperture : object
def with_offset(self, dx, dy):
return replace(self, x=self.x+dx, y=self.y+dy)
def rotate(self, rotation, cx=None, cy=None):
self.x, self.y = gp.rotate_point(self.x, self.y, rotation, cx, cy)
def to_primitives(self):
yield from self.aperture.flash(self.x, self.y)
def to_statements(self, gs):
yield from gs.set_polarity(self.polarity_dark)
yield from gs.set_aperture(self.aperture)
yield FlashStmt(self.x, self.y)
class Region(GerberObject):
def __init__(self, outline=[], arc_centers=None, *, polarity_dark):
super().__init__(self, polarity_dark=polarity_dark)
self.poly = gp.ArcPoly()
def with_offset(self, dx, dy):
return Region([ (x+dx, y+dy) for x, y in outline ], radii, polarity_dark=self.polarity_dark)
def rotate(self, angle, cx=0, cy=0):
self.poly.outline = [ gp.rotate_point(x, y, angle, cx, cy) for x, y in self.poly.outline ]
self.poly.arc_centers = [ gp.rotate_point(x, y, angle, cx, cy) for x, y in self.poly.arc_centers ]
def append(self, obj):
if not self.outline:
self.poly.outline.append(obj.p1)
self.poly.outline.append(obj.p2)
if isinstance(obj, Arc):
self.poly.arc_centers.append(obj.center)
else:
self.poly.arc_centers.append(None)
def to_primitives(self):
self.poly.polarity_dark = polarity_dark
yield self.poly
def to_statements(self, gs):
yield RegionStartStmt()
yield from gs.set_current_point(self.poly.outline[0])
for point, arc_center in zip(self.poly.outline, self.poly.arc_centers):
if arc_center is None:
yield from gs.set_interpolation_mode(LinearModeStmt)
yield InterpolateStmt(*point)
else:
cx, cy = arc_center
x2, y2 = point
yield from gs.set_interpolation_mode(CircularCCWModeStmt)
yield InterpolateStmt(x2, y2, cx-x2, cy-y2)
yield RegionEndStmt()
class Line(GerberObject):
# Line with *round* end caps.
x1 : float
y1 : float
x2 : float
y2 : float
aperture : object
def with_offset(self, dx, dy):
return replace(self, x1=self.x1+dx, y1=self.y1+dy, x2=self.x2+dx, y2=self.y2+dy)
def rotate(self, rotation, cx=None, cy=None):
if cx is None:
cx = (self.x1 + self.x2) / 2
cy = (self.y1 + self.y2) / 2
self.x1, self.y1 = gp.rotate_point(self.x1, self.y1, rotation, cx, cy)
self.x2, self.y2 = gp.rotate_point(self.x2, self.y2, rotation, cx, cy)
@property
def p1(self):
return self.x1, self.y1
@property
def p2(self):
return self.x2, self.y2
def to_primitives(self):
yield gp.Line(*self.p1, *self.p2, self.aperture.equivalent_width, polarity_dark=self.polarity_dark)
def to_statements(self, gs):
yield from gs.set_aperture(self.aperture)
yield from gs.set_interpolation_mode(LinearModeStmt)
yield from gs.set_current_point(self.p1)
yield InterpolateStmt(*self.p2)
class Arc(GerberObject):
x : float
y : float
r : float
angle1 : float # radians!
angle2 : float # radians!
aperture : object
@classmethod
def from_coords(kls, start, end, center_delta, aperture, flipped=False, polarity_dark=True):
x0, y0 = start
x1, y1 = end
dx, dy = center_delta
cx, cy = x0+dx, y0+dy
angle1 = math.atan2(y0-cy, x0-cx)
angle2 = math.atan2(y1-cy, x1-cx)
aperture = self.aperture
if flipped:
angle1, angle2 = angle2, angle1
r = math.sqrt(dx**2 + dy**2)
# r should be approximately (depending on coordinate resolution) equal for center->start and center->end
return kls(cx, cy, r, angle1, angle2, polarity_dark=polarity_dark)
def with_offset(self, dx, dy):
return replace(self, x=self.x+dx, y=self.y+dy)
@property
def p1(self):
return self.x + self.r*sin(self.angle1), self.y + self.r*cos(self.angle1)
@property
def p2(self):
return self.x + self.r*sin(self.angle2), self.y + self.r*cos(self.angle2)
@property
def center(self):
return (self.x, self.y)
def rotate(self, rotation, cx=None, cy=None):
self.x, self.y = gp.rotate_point(self.x, self.y, rotation, cx, cy)
self.angle1 = (self.angle1+rotation) % (2*math.pi)
self.angle2 = (self.angle2+rotation) % (2*math.pi)
def to_primitives(self):
yield gp.Arc(self.x, self.y, self.r, self.angle1, self.angle2, self.aperture.equivalent_width, polarity_dark=self.polarity_dark)
def to_statements(self, gs):
yield from gs.set_aperture(self.aperture)
yield from gs.set_interpolation_mode(CircularCCWModeStmt)
yield from gs.set_current_point(self.p1)
x2, y2 = self.p2
yield InterpolateStmt(x2, y2, self.x-x2, self.y-y2)
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