/**
* Calculates how every traffic light should be switched Per node, per sign the waiting roadusers
* are passed and per each roaduser the gain is calculated.
*
* @param The TLDecision is a tuple consisting of a traffic light and a reward (Q) value, for it
* to be green
* @see gld.algo.tlc.TLDecision
*/
public TLDecision[][] decideTLs() {
int num_dec;
int num_tld = tld.length;
// Determine wheter it should be random or not
boolean do_this_random = false;
if (random_number.nextFloat() < random_chance) do_this_random = true;
for (int i = 0; i < num_tld; i++) {
num_dec = tld[i].length;
for (int j = 0; j < num_dec; j++) {
Sign currenttl = tld[i][j].getTL();
float gain = 0;
Drivelane currentlane = currenttl.getLane();
int waitingsize = currentlane.getNumRoadusersWaiting();
ListIterator queue = currentlane.getQueue().listIterator();
if (!do_this_random) {
for (; waitingsize > 0; waitingsize--) {
Roaduser ru = (Roaduser) queue.next();
int pos = ru.getPosition();
Node destination = ru.getDestNode();
gain +=
q_table[currenttl.getId()][pos][destination.getId()][1]
- q_table[currenttl.getId()][pos][destination.getId()][0]; // red - green
}
float q = gain;
} else gain = random_number.nextFloat();
tld[i][j].setGain(gain);
}
}
return tld;
}
