Game Controls - Android Games Practical Programming by Example - page 88

}
else {

return best[(best[0]==backDir?1:0)];

}

}

return backDir;

}

Pathfinding at a Crossway
As the monster approaches a crossway, it has to decide which direction is passable.
//Determines if the specified monster is at a crossway
//Paramters:
// m - the specified monster

public boolean checkIfCrossWay(Monster m){

int mrow = m.row;
int mcol = m.col;

switch (m.direction){

case DIR_DOWN:
case DIR_UP:
if (gv.checkIfCrossWay(mrow,mcol-1)||
gv.checkIfCrossWay(mrow,mcol+1)) return true ;
break ;

case DIR_LEFT:
case DIR_RIGHT:
if (gv.checkIfCrossWay(mrow-1,mcol)||
gv.checkIfCrossWay(mrow+1,mcol)) return true ;
break ;

default :

return true ;

}