Game Controls - Android Games Practical Programming by Example - page 87

int [][] options = {
{0,1},{-1,0},{1,0},{0,-1}
};
int [] best = new int [2];
int bestCount=0;
int mid_d = Integer. MAX_VALUE ;
for ( int i=0;i<options. length ;i++){
int tempCol = m.col+options[i][0];
int tempRow = m.row+options[i][1];
if (gv.checkCollision(tempRow,tempCol)){
continue ;
}
int mx = tempCol*TILE_SIZE+TILE_SIZE/2;
int my = tempRow*TILE_SIZE+TILE_SIZE/2;
//calculates Monte Carlo distance
int distance = Math. abs (hx-mx)+Math. abs (hy-my);
if (distance < mid_d){
best[0] = i;
mid_d = distance;
bestCount = 1;
}
else if (distance == mid_d){
best[1] = i;
bestCount = 2;
}
}
if (bestCount == 1){
return best[0];
}
else if (bestCount == 2){
if (backDir == -1){
return best[(Math. random ()>0.5?0:1)];
}
else if (best[0]!=backDir && best[1]!=backDir){
return best[(Math. random ()>0.5?0:1)];