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[symfont] Minor

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This commit is contained in:
Behdad Esfahbod 2017-02-20 17:20:44 -06:00
parent 821ea7385f
commit a690907243
1 changed files with 16 additions and 19 deletions
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35
Snippets/symfont.py
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@ -14,7 +14,7 @@ n = 3 # Max Bezier degree; 3 for cubic, 2 for quadratic
t, x, y = sp.symbols('t x y', real=True) t, x, y = sp.symbols('t x y', real=True)
c = sp.symbols('c', real=False) # Complex representation instead of x/y c = sp.symbols('c', real=False) # Complex representation instead of x/y
P = tuple(zip(*(sp.symbols('%s:%d'%(w,n+1), real=True) for w in 'xy'))) P = tuple(zip(*(sp.symbols('P:%d[%s]'%(n+1,w), real=True) for w in '01')))
C = tuple(sp.symbols('c:%d'%(n+1), real=False)) C = tuple(sp.symbols('c:%d'%(n+1), real=False))
# Cubic Bernstein basis functions # Cubic Bernstein basis functions
@ -116,10 +116,7 @@ class BezierFuncs(dict):
self._bezfuncs = {} self._bezfuncs = {}
def __missing__(self, i): def __missing__(self, i):
args = [] args = ['P%d'%d for d in range(i+1)]
for d in range(i+1):
args.append('x%d' % d)
args.append('y%d' % d)
return sp.lambdify(args, green(self._symfunc, BezierCurve[i])) return sp.lambdify(args, green(self._symfunc, BezierCurve[i]))
class GreenPen(BasePen): class GreenPen(BasePen):
@ -141,23 +138,22 @@ class GreenPen(BasePen):
def _moveTo(self, p0): def _moveTo(self, p0):
self.__startPoint = p0 self.__startPoint = p0
def _lineTo(self, p1):
p0 = self._getCurrentPoint()
self.value += self._funcs[1](p0[0],p0[1],p1[0],p1[1])
def _qCurveToOne(self, p1, p2):
p0 = self._getCurrentPoint()
self.value += self._funcs[2](p0[0],p0[1],p1[0],p1[1],p2[0],p2[1])
def _curveToOne(self, p1, p2, p3):
p0 = self._getCurrentPoint()
self.value += self._funcs[3](p0[0],p0[1],p1[0],p1[1],p2[0],p2[1],p3[0],p3[1])
def _closePath(self): def _closePath(self):
p0 = self._getCurrentPoint() p0 = self._getCurrentPoint()
if p0 != self.__startPoint: if p0 != self.__startPoint:
p1 = self.__startPoint self._lineTo(self.__startPoint)
self.value += self._funcs[1](p0[0],p0[1],p1[0],p1[1])
def _lineTo(self, p1):
p0 = self._getCurrentPoint()
self.value += self._funcs[1](p0, p1)
def _qCurveToOne(self, p1, p2):
p0 = self._getCurrentPoint()
self.value += self._funcs[2](p0, p1, p2)
def _curveToOne(self, p1, p2, p3):
p0 = self._getCurrentPoint()
self.value += self._funcs[3](p0, p1, p2, p3)
AreaPen = partial(GreenPen, func=1) AreaPen = partial(GreenPen, func=1)
MomentXPen = partial(GreenPen, func=x) MomentXPen = partial(GreenPen, func=x)
@ -172,6 +168,7 @@ if __name__ == '__main__':
pen.moveTo((100,100)) pen.moveTo((100,100))
pen.lineTo((100,200)) pen.lineTo((100,200))
pen.lineTo((200,200)) pen.lineTo((200,200))
pen.curveTo((200,250),(300,300),(250,350))
pen.lineTo((200,100)) pen.lineTo((200,100))
pen.closePath() pen.closePath()
print(pen.value) print(pen.value)