public Track chooseTrack(Random random) {
Track[] tracks = getTracks();
float[] probs = new float[tracks.length];
float totalProb = 0;
for (int i = 0; i < tracks.length; i++) {
totalProb += getProbability(tracks[i]);
probs[i] = totalProb;
// System.out.println(Float.toString(totalProb) + " " + getProbability(tracks[i]) + " " +
// tracks[i]);
}
if (totalProb == 0) return null;
while (true) {
float rand = Math.abs(random.nextFloat()) * totalProb;
// System.out.println("r=" + Float.toString(rand));
for (int i = 0; i < tracks.length; i++) if (rand <= probs[i]) return tracks[i];
}
}
