/*
* Computoser is a music-composition algorithm and a website to present the results
* Copyright (C) 2012-2014 Bozhidar Bozhanov
*
* Computoser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Computoser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Computoser. If not, see <http://www.gnu.org/licenses/>.
*/
package com.music;
import java.util.Random;
import jm.constants.Pitches;
import jm.music.data.Note;
import jm.music.data.Part;
import jm.music.data.Phrase;
import jm.music.data.Rest;
import jm.music.data.Score;
import com.music.model.PartType;
import com.music.model.ToneType;
import com.music.util.music.Chance;
import com.music.util.music.NoteFactory;
public class TimpaniPartGenerator implements ScoreManipulator {
private Random random = new Random();
@Override
public void handleScore(Score score, ScoreContext ctx) {
Part timpaniPart = ctx.getParts().get(PartType.TIMPANI);
if (timpaniPart == null) {
return;
}
Phrase phrase = new Phrase();
for (int i = 0; i < ctx.getMeasures(); i++) {
if (Chance.test(20)) {
phrase.add(getNote(ctx, ToneType.TONIC));
phrase.add(getNote(ctx, ToneType.MEDIANT));
if (Chance.test(20)) {
phrase.add(getNote(ctx, ToneType.TONIC));
} else {
phrase.addRest(new Rest(ctx.getNormalizedMeasureSize() / 4));
}
phrase.addRest(new Rest(ctx.getNormalizedMeasureSize() / 4));
} else {
phrase.addRest(new Rest(ctx.getNormalizedMeasureSize()));
}
}
phrase.setDynamic(100);
timpaniPart.add(phrase);
}
private Note getNote(ScoreContext ctx, ToneType tone) {
int pitch = Pitches.C3 + ctx.getScale().getDefinition()[tone.getDegree()];
Note note = NoteFactory.createNote(pitch, ctx.getNormalizedMeasureSize() / 4);
note.setDynamic(52 + random.nextInt(10));
note.setDuration(1.2);
return note;
}
}