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svgpathtools
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Andy Port 2018-05-22 19:59:03 -07:00 committed by GitHub
parent eafe3682b9
commit 0827206953
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1 changed files with 19 additions and 16 deletions
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35
svgpathtools/path.py
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@ -169,7 +169,7 @@ def rotate(curve, degs, origin=None):
def transform(z):
return exp(1j*radians(degs))*(z - origin) + origin
if origin == None:
if origin is None:
if isinstance(curve, Arc):
origin = curve.center
else:
@ -206,23 +206,25 @@ def translate(curve, z0):
raise TypeError("Input `curve` should be a Path, Line, "
"QuadraticBezier, CubicBezier, or Arc object.")
def scale(curve, s, origin=None):
"""Scales the curve by the factor s around the origin such that
scale(curve, s, origin).point(t) = ((curve.point(t) - origin) * s) + origin"""
def scale(curve, factor, origin=0j):
"""Scales `curve` by scalar `factor` around `origin`.
Note: scale(curve, s, origin).point(t) ==
((curve.point(t) - origin) * factor) + origin
"""
def _scale_point(z, s, origin):
return ((z - origin) * s) + origin
if origin == None:
origin = 0 + 0j
if isinstance(curve, Path):
return Path(*[scale(seg, s, origin) for seg in curve])
return Path(*[scale(seg, factor, origin) for seg in curve])
elif is_bezier_segment(curve):
return bpoints2bezier([_scale_point(bpt, s, origin) for bpt in curve.bpoints()])
return bpoints2bezier([_scale_point(bpt, factor, origin) for bpt in curve.bpoints()])
elif isinstance(curve, Arc):
new_start = _scale_point(curve.start, s, origin)
new_end = _scale_point(curve.end, s, origin)
return Arc(new_start, radius=curve.radius * s, rotation=curve.rotation,
new_start = _scale_point(curve.start, factor, origin)
new_end = _scale_point(curve.end, factor, origin)
return Arc(new_start, radius=curve.radius * factor, rotation=curve.rotation,
large_arc=curve.large_arc, sweep=curve.sweep, end=new_end)
else:
raise TypeError("Input `curve` should be a Path, Line, "
@ -660,7 +662,7 @@ class Line(object):
return translate(self, z0)
def scaled(self, factor, origin=None):
"""Returns a copy of self scaled by the scalar `factor`, about the complex point `origin`."""
"""Returns copy of self scaled by `factor` about `origin`."""
return scale(self, factor, origin=origin)
@ -908,7 +910,7 @@ class QuadraticBezier(object):
return translate(self, z0)
def scaled(self, factor, origin=None):
"""Returns a copy of self scaled by the scalar `factor`, about the complex point `origin`."""
"""Returns copy of self scaled by `factor` about `origin`."""
return scale(self, factor, origin=origin)
@ -1152,7 +1154,7 @@ class CubicBezier(object):
return translate(self, z0)
def scaled(self, factor, origin=None):
"""Returns a copy of self scaled by the scalar `factor`, about the complex point `origin`."""
"""Returns copy of self scaled by `factor` about `origin`."""
return scale(self, factor, origin=origin)
@ -1721,9 +1723,10 @@ class Arc(object):
return translate(self, z0)
def scaled(self, factor, origin=None):
"""Returns a copy of self scaled by the scalar `factor`, about the complex point `origin`."""
"""Returns copy of self scaled by `factor` about `origin`."""
return scale(self, factor, origin=origin)
def is_bezier_segment(x):
return (isinstance(x, Line) or
isinstance(x, QuadraticBezier) or
@ -2281,5 +2284,5 @@ class Path(MutableSequence):
return translate(self, z0)
def scaled(self, factor, origin=None):
"""Returns a copy of self scaled by the scalar `factor`, about the complex point `origin`."""
"""Returns copy of self scaled by `factor` about `origin`."""
return scale(self, factor, origin=origin)