GEOM ___________ getDirectionInRad by 2 points

var getDirection = function(s,d){return((-Math.PI/2+ -(Math.atan2((d.y-s.y),(d.x-s.x))))+(Math.PI*2))%(Math.PI*2);}

// getDirection({x:0, y:0},{x:0,y:100}) * (180/Math.PI);
->180