Cocoscreator Coordinate code

Update:function (DT) {
Get the coordinates of the monsters
var sp = This.guaiwu.convertToWorldSpaceAR (This.guaiwu.getPosition ())
Get the coordinates of the turret
var pos = This.node.convertToWorldSpaceAR (This.node.getPosition ())
Cc.log (POS,SP)
Calculate the coordinate difference between a monster and a turret
var truepos=cc.p (SP.X-POS.X,SP.Y-POS.Y)
Convert their coordinate differences to radians
var angle=cc.panglesigned (TRUEPOS,CC.P (0,1));
Convert their radians to angles.
var angledegrees=cc.radianstodegrees (angle);
Each frame of the turret is angled toward the coordinates of the monster.
This.node.runAction (Cc.rotateto (dt,angledegrees))
var PO1 = this.paota.getPosition ()

if (0) {
Local coordinate transformation
var po2 = This.canvas.convertToNodeSpaceAR (Touch.getlocation ())
Cc.log (po1.x,po1.y, ' | ', po2.x, PO2.Y)
}else{
Global Coordinate transformation
PO1 = This.bg.convertToWorldSpaceAR (PO1)
PO1 = Cc.psub (Touch.getlocation (), PO1)
}
var at = cc.radianstodegrees (cc.panglesigned (PO1, CC.P (0,1)))
This.hand.rotation = at