def markScale(self, scaleName, keyName):
"""Mark the scale in the given key.
scaleName -- a key found in INTERVALS
keyName -- see: checkNoteName()
Does not call update(). Raise Exception if either scaleName or keyName
is unknown. Return None.
"""
try:
keyName = self.checkNoteName(keyName)
except:
raise Exception('Unknown key name: {}'.format(repr(keyName)))
intervals = INTERVALS.get(scaleName, None)
if intervals is None:
raise Exception('Unknown scale name: {}'.format(repr(scaleName)))
self.markedNotes = []
idx = NOTES.index(keyName)
shiftedNotes = listRot(NOTES, -idx)
notes = [shiftedNotes[0]]
i = 0
for ii in intervals[:-1]:
i = i + ii
notes.append(shiftedNotes[i])
self.markedNotes = []
for name in notes:
noteName = self.checkNoteName(name)
for string, stringNotes in enumerate(self.allNotes):
for fret, note in enumerate(stringNotes):
if note == noteName:
self.markedNotes.append((string, fret,
note == keyName))
def _createNotes(self):
"""Create a MxN array of all note names on the neck.
M is self.nStrings
N is self.nFrets (+1 for the open string).
Return None.
"""
# index 0 is the bottom (lightest) string
self.allNotes = [[] for n in range(self.nStrings)]
t = self.tuning[-1::-1]
for string in range(self.nStrings):
i = NOTES.index(t[string])
notes = NOTES[i:] + NOTES[:i]
for f, note in enumerate(cycle(notes)):
if f > self.nFrets:
break
self.allNotes[string].append(note)
