AB.mind.getAction =function( x )// x is an array of [ theagent.position.x, theagent.position.z, theenemy.position.x, theenemy.position.z ]{var ai = x[0];var aj = x[1];var ei = x[2];var ej = x[3];// if strictly move away, will get stuck at (invisible) wall, so introduce randomness if( ei < ai )return( AB.randomPick ( ACTION_RIGHT, AB.randomPick3 ( ACTION_LEFT, ACTION_UP, ACTION_DOWN )));if( ei > ai )return( AB.randomPick ( ACTION_LEFT, AB.randomPick3 ( ACTION_RIGHT, ACTION_UP, ACTION_DOWN )));if( ej < aj )return( AB.randomPick ( ACTION_UP, AB.randomPick3 ( ACTION_DOWN, ACTION_RIGHT, ACTION_LEFT )));if( ej > aj )return( AB.randomPick ( ACTION_DOWN, AB.randomPick3 ( ACTION_UP, ACTION_RIGHT, ACTION_LEFT )));return( AB.randomIntAtoB (0,3));};