def _create_neume_element(self):
if "climacus" in self.glyph["form"]:
neume = mod.ineume_()
else:
neume = mod.uneume_()
neume.id = self._idgen()
zone = self._create_zone_element()
neume.facs = zone.id
neume.attributes = {"name": self.glyph["form"][0]}
# get the form so we can find the number of notes we need to construct.
try:
# since we define the form of the intervals, we're always off-by-one in the number of notes.
num_notes = len(self.NEUME_NOTES[self.glyph["form"][0]]) + 1
except KeyError:
raise GameraMeiFormNotFoundError("The form {0} was not found.".format(self.glyph["form"][0]))
# do we need to add any further notes? form is pretty loaded, so we
# have to check manually, from idx 1 on (since the primary form is always first)
# we don't have an off-by-one problem here, since an added interval means an added note
check_additional = [i for i in self.ADD_NOTES.keys() if i in self.glyph["form"][1:]]
num_notes = num_notes + len(check_additional)
self._neume_pitches = []
# note elements are everything after the first form. This determines the shape a note takes.
self._note_elements = self.glyph["form"][1:]
self._neume_pitches.append(self.glyph["strt_pitch"])
nc = []
if num_notes > 1:
# we need to figure out the rest of the pitches in the neume.
ivals = [int(d) for d in self._note_elements if d.isdigit()]
try:
idx = self.SCALE.index(self.glyph["strt_pitch"].upper())
except ValueError:
raise GameraMeiPitchNotFoundError(
"The pitch {0} was not found in the scale".format(self.glyph["strt_pitch"])
)
if len(ivals) != (num_notes - 1):
raise GameraMeiNoteIntervalMismatchError(
"There is a mismatch between the number of notes and number of intervals."
)
# note elements = torculus.2.2.he.ve
# ivals = [2,2]
# torculus = ['u','d']
lg.debug(ivals)
for n in xrange(len(ivals)):
# get the direction
dir = self.NEUME_NOTES[self.glyph["form"][0]][n]
lg.debug("direction is {0}".format(dir))
iv = ivals[n]
n_idx = idx
lg.debug("index: {0}".format(idx))
if dir == "u":
if (idx + (iv - 1)) >= len(self.SCALE):
n_idx = 0 + (iv - 1)
else:
n_idx = idx + (iv - 1)
elif dir == "d":
if idx - (iv - 1) < 0:
n_idx = len(self.SCALE) + (idx - (iv - 1))
else:
n_idx = idx - (iv - 1)
idx = n_idx
lg.debug("Picking pitch {0}".format(self.SCALE[n_idx]))
self._neume_pitches.append(self.SCALE[n_idx])
for n in xrange(num_notes):
p = self._neume_pitches[n]
nc.append(self._create_note_element(p))
neume.add_children(nc)
lg.debug(neume.children)
return neume
