shadowfacts/fonttools
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[perimeterPoint] Minor

Browse Source
This commit is contained in:
Behdad Esfahbod 2017-02-20 11:09:14 -06:00
parent 3d4bd76a76
commit 6738305fb1
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Lib/fontTools/pens/perimeterPen.py
View File

@ -31,10 +31,10 @@ class PerimeterPen(BasePen):
self._mult = 1.+1.5*tolerance # The 1.5 is a empirical hack; no math
# Choose which algorithm to use for quadratic and for cubic.
# Lobatto is faster but has fixed error characteristic with no strong
# Quadrature is faster but has fixed error characteristic with no strong
# error bound. The cutoff points are derived empirically.
self._addCubic = self._addCubicLobatto if tolerance >= 0.0015 else self._addCubicRecursive
self._addQuadratic = self._addQuadraticLobatto if tolerance >= 0.00075 else self._addQuadraticExact
self._addCubic = self._addCubicQuadrature if tolerance >= 0.0015 else self._addCubicRecursive
self._addQuadratic = self._addQuadraticQuadrature if tolerance >= 0.00075 else self._addQuadraticExact
def _moveTo(self, p0):
self.__startPoint = p0
@ -65,7 +65,7 @@ class PerimeterPen(BasePen):
Len = abs(2 * (_intSecAtan(x1) - _intSecAtan(x0)) * origDist / (scale * (x1 - x0)))
self.value += Len
def _addQuadraticLobatto(self, c0, c1, c2):
def _addQuadraticQuadrature(self, c0, c1, c2):
# Approximate length of quadratic Bezier curve using Lobatto quadrature
# with n=4 points: endpoints and at t=.5±sqrt(1/5)/2
#
@ -98,7 +98,7 @@ class PerimeterPen(BasePen):
self._addCubicRecursive(*one)
self._addCubicRecursive(*two)
def _addCubicLobatto(self, c0, c1, c2, c3):
def _addCubicQuadrature(self, c0, c1, c2, c3):
# Approximate length of cubic Bezier curve using Lobatto quadrature
# with n=5 points: endpoints, midpoint, and at t=.5±sqrt(3/7)/2
#