Solving for angle

gistfile1.txt

//please don't use this in building the next space shuttle  :)

//var vertex is an array which has all our points to build our polygon with

testPolygon = new google.maps.Polygon({ paths: vertex, fillColor: color, geodesic: true, fillOpacity: 1, strokeColor: '#00ff00', strokeWeight: 1, strokeOpacity: 0.6 });
                    
                    count= 0;
                    while (count<vertex.length){
                      //lets check the angle between the last two vectors
                       if (count == vertex.length - 2){
                            
                            console.log('count is at ' + count);
                            point1 = testPolygon.getPath().getAt(count);
                            y1 = point1.lat();
                            x1 = point1.lng();
                            
                            
                            point2 = testPolygon.getPath().getAt(count+1);
                            y2 = point2.lat();
                            x2 = point2.lng();
                           
                           
                            point3 = testPolygon.getPath().getAt(0);
                            y3 = point3.lat();
                            x3 = point3.lng();

                       //Calculate vectors

                            vx1 = x2 - x1;
                            vy1 = y2 - y1;
                            
                            vx2 =  x2 - x3;
                            vy2 = y2 - y3;
                            
                            cw_or_ccw = ((vx1 * vy2) - (vx2 * vy1));  //cross product
                            
                            angle = Math.acos((vx1 * vx2 + vy1 * vy2) / ( Math.sqrt( vx1*vx1 + vy1*vy1 ) * Math.sqrt( vx2*vx2 + vy2*vy2 ) ));
                            
                  //Take into account cross product (winding direction)
                  //the angle is in radians, i converted it to degrees
                            if(cw_or_ccw > 0){ // if crossproduct is positive
                                ourPointsAngle = 57.2957795*angle;
                            } else {  // if crossproduct is negative
                                forCCW += 57.2957795*angle;
                                ourPointsAngle = 360-57.2957795*angle;
                            }
                            
                            console.log(ourPointsAngle);

                        }