def topopolyline(nbpoints=3, gmap=None):
if gmap is None: gmap = GMap(1)
darts = [gmap.add_dart() for i in xrange(nbpoints * 2)]
for i in xrange(nbpoints):
gmap.link_darts(0, darts[2 * i], darts[2 * i + 1])
for i in xrange(nbpoints - 1):
gmap.link_darts(1, darts[2 * i + 1], darts[2 * i + 2])
return gmap, darts
def topopolygon(nbpoints=3, gmap=None):
if gmap is None: gmap = GMap(2)
darts = [gmap.add_dart() for i in xrange(nbpoints * 2)]
for i in xrange(nbpoints):
gmap.link_darts(0, darts[2 * i], darts[2 * i + 1])
for i in xrange(nbpoints):
gmap.link_darts(1, darts[2 * i + 1],
darts[(2 * i + 2) % (2 * nbpoints)])
return gmap, darts
