/*
* See org.jgap.FitnessFunction#evaluate(org.jgap.IChromosome)
*/
@Override
protected double evaluate(IChromosome chromosome) {
// NB all fitness measures for individual genes are normalised to be between 0 and 1 (inclusive)
Integer polyphony = EvolveImprovisers.getPolyphonyOf(chromosome);
Integer maxNotesToGenerate = EvolveImprovisers.getMaxNotesOf(chromosome);
Integer key = EvolveImprovisers.getKeyOf(chromosome);
Integer noteRange = EvolveImprovisers.getNoteRangeOf(chromosome);
Integer lowestNote = EvolveImprovisers.getLowestNoteOf(chromosome);
Integer rhythmMultiplier = EvolveImprovisers.getRhythmMultiplierOf(chromosome);
Integer noteRestRatio = EvolveImprovisers.getNoteRestRatioOf(chromosome);
Integer medianTempo = EvolveImprovisers.getMedianTempoOf(chromosome);
Integer tempoVariance = EvolveImprovisers.getTempoVarianceOf(chromosome);
int[] improParameters = new int[9];
improParameters[0] = polyphony;
improParameters[1] = maxNotesToGenerate;
improParameters[2] = key;
improParameters[3] = noteRange;
improParameters[4] = lowestNote;
improParameters[5] = rhythmMultiplier;
improParameters[6] = noteRestRatio;
improParameters[7] = medianTempo;
improParameters[8] = tempoVariance;
// Score score = RandomSounds.generate(polyphony, maxNotesToGenerate, key, noteRange,
// lowestNote);
Integer noOfImprovisations = EvolveImprovisers.getNumImprovisationsOf(chromosome);
Improvisations improviserOutput = new Improvisations(noOfImprovisations, improParameters, true);
String filename = EvolveImprovisers.toString(chromosome);
System.err.println("Evaluating " + filename);
// TODO What I want to do next here:
// 1. Access a permanent but evolving population of compositions from the composer (i.e.
// Composer not Improviser)
// Improvisations improviserOutput = chromosome.getApplicationData();
// 2. rate all and evolve population accordingly (on the assumption it gets picked later)
improviserOutput.ratePopulation();
// 3. use fitness ratings to calculate Ritchie's criteria on that improviser/composer's output
double criteriaFitness = RitchieCriteria.calculateRitchieCriteria(improviserOutput);
presentCriteriaAndWaitTillUserReady();
// 4. return some weighted sum of the criteria as the fitness function score for that
// improviser/composer
return criteriaFitness;
}
private void presentCriteriaAndWaitTillUserReady() {
System.out.print(
"Press ENTER to continue when you have finished looking at the output of Ritchie's criteria for this Improviser");
BufferedReader in = Improvisations.getBufferedReaderIn();
try {
in.readLine(); // dont worry about doing anything with this, just pause till some input
// received to continue
} catch (Exception e) {
}
}
