def __init__(self, elems, epsilon=None):
"""elems should contain metapost knots or links"""
if epsilon is None:
epsilon = _epsilon
knots = []
is_closed = True
for i, elem in enumerate(elems):
if isinstance(elem, _link):
elem.set_knots(elems[i - 1], elems[(i + 1) % len(elems)])
elif isinstance(elem, _knot):
knots.append(elem)
if elem.ltype == mp_endpoint or elem.rtype == mp_endpoint:
is_closed = False
# link the knots among each other
for i in range(len(knots)):
knots[i - 1].next = knots[i]
# determine the control points
mp_make_choices(knots[0], epsilon)
pathmodule.path.__init__(self)
# build up the path
do_moveto = True
do_lineto = False
do_curveto = False
prev = None
for i, elem in enumerate(elems):
if isinstance(elem, _link):
do_moveto = False
if isinstance(elem, line):
do_lineto, do_curveto = True, False
else:
do_lineto, do_curveto = False, True
elif isinstance(elem, _knot):
if do_moveto:
self.append(pathmodule.moveto_pt(elem.x_pt, elem.y_pt))
if do_lineto:
self.append(pathmodule.lineto_pt(elem.x_pt, elem.y_pt))
elif do_curveto:
self.append(
pathmodule.curveto_pt(prev.rx_pt, prev.ry_pt,
elem.lx_pt, elem.ly_pt,
elem.x_pt, elem.y_pt))
do_moveto = True
do_lineto = False
do_curveto = False
prev = elem
# close the path if necessary
if knots[0].ltype == mp_explicit:
elem = knots[0]
if do_lineto and is_closed:
self.append(pathmodule.closepath())
elif do_curveto:
self.append(
pathmodule.curveto_pt(prev.rx_pt, prev.ry_pt, elem.lx_pt,
elem.ly_pt, elem.x_pt, elem.y_pt))
if is_closed:
self.append(pathmodule.closepath())
def updatepath(self, path, trafo, context):
othersubrnumber = context.t1stack.pop()
n = context.t1stack.pop()
for i in range(n):
context.psstack.append(context.t1stack.pop(0))
if othersubrnumber == 0:
flex_size, x, y = context.psstack[-3:]
if context.flex:
x1, y1, x2, y2, x3, y3 = context.psstack[2:8]
x1, y1 = trafo.apply_pt(x1, y1)
x2, y2 = trafo.apply_pt(x2, y2)
x3, y3 = trafo.apply_pt(x3, y3)
path.append(curveto_pt(x1, y1, x2, y2, x3, y3))
x1, y1, x2, y2, x3, y3 = context.psstack[8:14]
x1, y1 = trafo.apply_pt(x1, y1)
x2, y2 = trafo.apply_pt(x2, y2)
x3, y3 = trafo.apply_pt(x3, y3)
path.append(curveto_pt(x1, y1, x2, y2, x3, y3))
else:
path.append(lineto_pt(*trafo.apply_pt(x, y)))
context.psstack = [y, x]
elif othersubrnumber == 1:
pass
elif othersubrnumber == 2:
path.pathitems.pop()
context.psstack.append(context.x)
context.psstack.append(context.y)
def __init__(self, elems, epsilon=None):
"""elems should contain metapost knots or links"""
if epsilon is None:
epsilon = _epsilon
knots = []
is_closed = True
for i, elem in enumerate(elems):
if isinstance(elem, _link):
elem.set_knots(elems[i-1], elems[(i+1)%len(elems)])
elif isinstance(elem, _knot):
knots.append(elem)
if elem.ltype == mp_endpoint or elem.rtype == mp_endpoint:
is_closed = False
# link the knots among each other
for i in range(len(knots)):
knots[i-1].next = knots[i]
# determine the control points
mp_make_choices(knots[0], epsilon)
pathmodule.path.__init__(self)
# build up the path
do_moveto = True
do_lineto = False
do_curveto = False
prev = None
for i, elem in enumerate(elems):
if isinstance(elem, _link):
do_moveto = False
if isinstance(elem, line):
do_lineto, do_curveto = True, False
else:
do_lineto, do_curveto = False, True
elif isinstance(elem, _knot):
if do_moveto:
self.append(pathmodule.moveto_pt(elem.x_pt, elem.y_pt))
if do_lineto:
self.append(pathmodule.lineto_pt(elem.x_pt, elem.y_pt))
elif do_curveto:
self.append(pathmodule.curveto_pt(prev.rx_pt, prev.ry_pt, elem.lx_pt, elem.ly_pt, elem.x_pt, elem.y_pt))
do_moveto = True
do_lineto = False
do_curveto = False
prev = elem
# close the path if necessary
if knots[0].ltype == mp_explicit:
elem = knots[0]
if do_lineto and is_closed:
self.append(pathmodule.closepath())
elif do_curveto:
self.append(pathmodule.curveto_pt(prev.rx_pt, prev.ry_pt, elem.lx_pt, elem.ly_pt, elem.x_pt, elem.y_pt))
if is_closed:
self.append(pathmodule.closepath())
def updatepath(self, path, trafo, context):
dy1 = context.t1stack.pop(0)
dx2 = context.t1stack.pop(0)
dy2 = context.t1stack.pop(0)
dx3 = context.t1stack.pop(0)
path.append(curveto_pt(*(trafo.apply_pt(context.x, context.y + dy1) +
trafo.apply_pt(context.x + dx2, context.y + dy1 + dy2) +
trafo.apply_pt(context.x + dx2 + dx3, context.y + dy1 + dy2))))
context.x += dx2+dx3
context.y += dy1+dy2
def updatepath(self, path, trafo, context):
dx1 = context.t1stack.pop(0)
dx2 = context.t1stack.pop(0)
dy2 = context.t1stack.pop(0)
dy3 = context.t1stack.pop(0)
path.append(curveto_pt(*(trafo.apply_pt(context.x + dx1, context.y) +
trafo.apply_pt(context.x + dx1 + dx2, context.y + dy2) +
trafo.apply_pt(context.x + dx1 + dx2, context.y + dy2 + dy3))))
context.x += dx1+dx2
context.y += dy2+dy3
def updatepath(self, path, trafo, context):
dy1 = context.t1stack.pop(0)
dx2 = context.t1stack.pop(0)
dy2 = context.t1stack.pop(0)
dx3 = context.t1stack.pop(0)
path.append(curveto_pt(*(trafo.apply_pt(context.x, context.y + dy1) +
trafo.apply_pt(context.x + dx2, context.y + dy1 + dy2) +
trafo.apply_pt(context.x + dx2 + dx3, context.y + dy1 + dy2))))
context.x += dx2+dx3
context.y += dy1+dy2
def updatepath(self, path, trafo, context):
dx1 = context.t1stack.pop(0)
dx2 = context.t1stack.pop(0)
dy2 = context.t1stack.pop(0)
dy3 = context.t1stack.pop(0)
path.append(curveto_pt(*(trafo.apply_pt(context.x + dx1, context.y) +
trafo.apply_pt(context.x + dx1 + dx2, context.y + dy2) +
trafo.apply_pt(context.x + dx1 + dx2, context.y + dy2 + dy3))))
context.x += dx1+dx2
context.y += dy2+dy3