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Inline _splitCubicIntoN()

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This commit is contained in:
Behdad Esfahbod 2016-07-25 03:14:02 -04:00
parent 40bba687ab
commit 1cc3c5eae8
1 changed files with 9 additions and 12 deletions
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21
Lib/cu2qu/__init__.py
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@ -29,7 +29,15 @@ def calcCubicPoints(a, b, c, d):
_4 = a + d + c + b _4 = a + d + c + b
return _1, _2, _3, _4 return _1, _2, _3, _4
def _splitCubicIntoN(a, b, c, d, n): def calcCubicParameters(pt1, pt2, pt3, pt4):
c = (pt2 -pt1) * 3.0
b = (pt3 - pt2) * 3.0 - c
d = pt1
a = pt4 - d - c - b
return a, b, c, d
def splitCubicIntoN(pt1, pt2, pt3, pt4, n):
a, b, c, d = calcCubicParameters(pt1, pt2, pt3, pt4)
segments = [] segments = []
dt = 1./n dt = 1./n
for i in range(n): for i in range(n):
@ -49,17 +57,6 @@ def _splitCubicIntoN(a, b, c, d, n):
segments.append((pt1, pt2, pt3, pt4)) segments.append((pt1, pt2, pt3, pt4))
return segments return segments
def calcCubicParameters(pt1, pt2, pt3, pt4):
c = (pt2 -pt1) * 3.0
b = (pt3 - pt2) * 3.0 - c
d = pt1
a = pt4 - d - c - b
return a, b, c, d
def splitCubicIntoN(pt1, pt2, pt3, pt4, n):
a, b, c, d = calcCubicParameters(pt1, pt2, pt3, pt4)
return _splitCubicIntoN(a, b, c, d, n)
def splitCubicIntoTwo(pt1, pt2, pt3, pt4): def splitCubicIntoTwo(pt1, pt2, pt3, pt4):
mid = (pt1+3*(pt2+pt3)+pt4)*.125 mid = (pt1+3*(pt2+pt3)+pt4)*.125
deriv3 = (pt4+pt3-pt2-pt1)*.125 deriv3 = (pt4+pt3-pt2-pt1)*.125