public Harmony randomHarmony(List<Harmony> harmonies) {
int harmonyIndex = 0;
if (isOuterBoundaryIncluded) {
harmonyIndex = RandomUtil.randomInt(0, harmonies.size());
} else {
harmonyIndex = RandomUtil.randomInt(1, harmonies.size() - 1);
}
return harmonies.get(harmonyIndex);
}
@Override
public List<Note> createVariation(Note firstNote, Note secondNote) {
if (variationPattern.getNoteLengths().contains(secondNote.getLength())) {
secondNoteChanged = true;
double[] pattern = RandomUtil.getRandomFromDoubleArray(variationPattern.getPatterns());
Scale scale = RandomUtil.getRandomFromList(scales);
int newPitchClass = scale.pickPreviousPitchFromScale(firstNote.getPitchClass());
int ic = Util.intervalClass(newPitchClass - firstNote.getPitchClass());
int newPitch = firstNote.getPitch() - ic;
List<Note> notes = generateAccentedNonChordNote(secondNote, newPitchClass, newPitch, pattern);
notes.add(0, firstNote);
return notes;
} else {
return Collections.singletonList(firstNote.copy());
}
}