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Use to_polygons() for bounds calculation for simple path shapes

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jan 2019-05-20 21:06:28 -07:00
parent 2c9af3f63f
commit dcd8324eb4
1 changed files with 7 additions and 13 deletions
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20
masque/shapes/path.py
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@ -2,7 +2,7 @@ from typing import List, Tuple, Dict
import copy
from enum import Enum
import numpy
from numpy import pi
from numpy import pi, inf
from . import Shape, normalized_shape_tuple, Polygon, Circle
from .. import PatternError
@ -299,18 +299,12 @@ class Path(Shape):
elif self.cap in (Path.Cap.Flush,
Path.Cap.Square,
Path.Cap.SquareCustom):
extensions = self._calculate_cap_extensions()
v = remove_colinear_vertices(self.vertices, closed_path=False)
dv = numpy.diff(v, axis=0)
dvdir = dv / numpy.sqrt((dv * dv).sum(axis=1))[:, None]
perp = dvdir[:, ::-1] * [[1, -1]] * self.width / 2
v[0] -= dvdir * extensions[0]
v[-1] += dvdir * extensions[1]
bounds = self.offset + numpy.vstack((numpy.min(v - numpy.abs(perp), axis=0),
numpy.max(v + numpy.abs(perp), axis=0)))
bounds = numpy.array([[+inf, +inf], [-inf, -inf]])
polys = self.to_polygons()
for poly in polys:
poly_bounds = poly.get_bounds()
bounds[0, :] = numpy.minimum(bounds[0, :], poly_bounds[0, :])
bounds[1, :] = numpy.maximum(bounds[1, :], poly_bounds[1, :])
else:
raise PatternError('get_bounds() not implemented for endcaps: {}'.format(self.cap))