private boolean assignSpeeds(Map m, ArrayList<Road> roads) {
int[][] speeds = new int[m.getLengthX()][m.getLengthY()];
int count = 0;
for (Road r : roads) {
Tile[] adjTiles = getAdjTiles(m.grid, m.grid[r.getX()][r.getY()]);
Road start = null;
for (int i = 0; i < 4; i++) {
if (adjTiles[i] instanceof TrafficLight) {
start = r;
}
if (adjTiles[i] == null || adjTiles[i] instanceof NonRoad) {
if (i == r.getDirection() || i == Math.abs(r.getDirection() - 4)) {
start = r;
}
}
}
if (start != null) {
int dir = start.getDirection();
int length = 1;
Tile t = r;
// if(m.getInDir(r,dir) != null){
t = m.getInDir(r, dir);
if (t instanceof TrafficLight || t == null || t instanceof NonRoad) {
int reverseDir = (dir + 2 > 3) ? dir - 2 : dir + 2;
if (m.getInDir(r, reverseDir) != null) t = m.getInDir(r, reverseDir);
while (!(t == null || t instanceof TrafficLight || t instanceof NonRoad)) {
length++;
if (m.getInDir(t, reverseDir) != null) t = m.getInDir(t, reverseDir);
else break;
}
for (int i = 0; i < length; i++) {
t = m.getInDir(t, dir); // reverse direction
speeds[t.getX()][t.getY()] = determineSpeed(length);
}
} else {
while (!(t == null || t instanceof TrafficLight || t instanceof NonRoad)) {
length++;
if (m.getInDir(t, dir) != null) t = m.getInDir(t, dir);
else break;
}
int reverseDir = (dir + 2 > 3) ? dir - 2 : dir + 2;
for (int i = 0; i < length; i++) {
t = m.getInDir(t, reverseDir); // reverse directions
speeds[t.getX()][t.getY()] = determineSpeed(length);
}
}
}
// }
count++;
}
for (Road r : roads) {
r.setSpeed(speeds[r.getX()][r.getY()]);
}
return true;
}
private static Tile[] getAdjTiles(Tile[][] grid, Tile x) {
Tile[] y = new Tile[4];
if (!(x.getX() == 0)) y[3] = grid[x.getX() - 1][x.getY()];
if (!(x.getY() == 0)) y[0] = grid[x.getX()][x.getY() - 1];
if (!(x.getX() == grid.length - 1)) y[1] = grid[x.getX() + 1][x.getY()];
if (!(x.getY() == grid[0].length - 1)) y[2] = grid[x.getX()][x.getY() + 1];
return y;
}