def draw(self, ctx: cairo.Context, eye_radius: float, relative_to=(0, 0)):
pos = self.pos - relative_to
top_intersection = pos + np.array([0, self.opening / 2])
bottom_intersection = pos - np.array([0, self.opening / 2])
right_point = pos + np.array([self.size, 0])
left_point = pos - np.array([self.size, 0])
center_1, rad_1 = circle_from_3_points(left_point, top_intersection,
right_point)
center_2, rad_2 = circle_from_3_points(left_point, bottom_intersection,
right_point)
# Eyelid 1:
ctx.push_group()
with source(ctx, self.color.to_pattern()):
# Restrict drawing area to eyeball:
ctx.arc(pos[0], pos[1], eye_radius + 1, 0, math.tau)
ctx.clip()
ctx.paint()
# Sub circle 1:
with operator(ctx, cairo.Operator.CLEAR):
ctx.arc(center_1[0], center_1[1], rad_1, 0, math.tau)
ctx.fill()
ctx.reset_clip()
with source(ctx, ctx.pop_group()):
ctx.paint()
# Eyelid 2:
ctx.push_group()
with source(ctx, self.color.to_pattern()):
# Restrict drawing area to eyeball:
ctx.arc(pos[0], pos[1], eye_radius + 1, 0, math.tau)
ctx.clip()
ctx.paint()
# Sub circle 2:
with operator(ctx, cairo.Operator.CLEAR):
ctx.arc(center_2[0], center_2[1], rad_2, 0, math.tau)
ctx.fill()
ctx.reset_clip()
with source(ctx, ctx.pop_group()):
ctx.paint()
