/*
* 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.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.util.music.Chance;
import com.music.util.music.NoteFactory;
public class SimpleBeatGenerator implements ScoreManipulator {
private Random random = new Random();
@Override
public void handleScore(Score score, ScoreContext ctx) {
Part drumPart = ctx.getParts().get(PartType.SIMPLE_BEAT);
if (drumPart == null) {
return;
}
Phrase phrase = new Phrase();
boolean needsBass = Chance.test(80);
boolean hasBass = ctx.getParts().get(PartType.BASS) != null;
// "four on the floor" in case of faster pieces that (in most cases) have a bass
if (PartConfigurer.isRegularMetre(ctx) && Chance.test(50) && ctx.getParts().get(PartType.PERCUSSIONS) == null && score.getTempo() > 115 && (needsBass ? hasBass : true)) {
ctx.setFourToTheFloor(true);
drumPart.setChannel(9);
for (int i = 0; i < ctx.getMeasures(); i++) {
for (int k = 0; k < 4; k++) {
Note note = NoteFactory.createNote(35 + k % 2, ctx.getNormalizedMeasureSize() / 4);
phrase.add(note);
}
}
} else {
for (int i = 0; i < ctx.getMeasures(); i++) {
Note note = NoteFactory.createNote(40 + random.nextInt(30), ctx.getNormalizedMeasureSize() / 4);
phrase.add(note);
phrase.add(new Rest(ctx.getNormalizedMeasureSize() - note.getRhythmValue()));
}
}
drumPart.add(phrase);
}
}