/*
* 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.util.music.Chance;
import com.music.util.music.NoteFactory;
public class EffectsGenerator implements ScoreManipulator {
private Random random = new Random();
@Override
public void handleScore(Score score, ScoreContext ctx) {
Part effectsPart = ctx.getParts().get(PartType.EFFECTS);
if (effectsPart == null) {
return;
}
Phrase phrase = new Phrase();
int restPercentage = Chance.test(65) ? 75 : 15; //sporadic vs regular
for (int i = 0; i < ctx.getMeasures(); i++) {
handleEffects(ctx, phrase, restPercentage);
}
effectsPart.add(phrase);
}
private void handleEffects(ScoreContext ctx, Phrase phrase, int restPercentages) {
if (Chance.test(restPercentages)) {
phrase.addRest(new Rest(ctx.getNormalizedMeasureSize()));
} else {
int pitch = getRandomPitch(ctx);
double effectLength = random.nextDouble() * ctx.getNormalizedMeasureSize();
effectLength = Math.min(effectLength, ctx.getNormalizedMeasureSize());
Note note = NoteFactory.createNote(pitch, effectLength);
phrase.add(note);
double lastRest = ctx.getNormalizedMeasureSize() - effectLength;
if (lastRest > 0) {
phrase.add(new Rest(lastRest));
}
}
}
private int getRandomPitch(ScoreContext ctx) {
int pitch = Pitches.C4
+ ctx.getKeyNote()
+ ctx.getScale().getDefinition()[random.nextInt(ctx.getScale().getDefinition().length)];
return pitch;
}
}