// Returns a function used for alerting users that another user, within visible range, has changed position
func movedFun(tId uint, usr *user.U) func(mNS, mEW float64, e interface{}) {
return func(mNS, mEW float64, e interface{}) {
oUsr := e.(*user.U)
if !usr.Equiv(oUsr) {
broadcastSend(tId, msgdef.SMovedOp, usr, oUsr)
}
}
}
// Deletes usr from tree at the given coords
func deleteUsr(mNS, mEW float64, usr *user.U, tree quadtree.T) {
v := quadtree.PointViewP(mNS, mEW)
pred := func(_, _ float64, e interface{}) bool {
oUsr := e.(*user.U)
return usr.Equiv(oUsr)
}
tree.Del(v, pred)
}
// Returns a function used for alerting users that another user has been added to the system
func initLocFun(tId uint, usr *user.U) func(mNS, mEW float64, e interface{}) {
return func(mNS, mEW float64, e interface{}) {
oUsr := e.(*user.U)
if !usr.Equiv(oUsr) {
broadcastSend(tId, msgdef.SVisibleOp, usr, oUsr)
broadcastSend(tId, msgdef.SVisibleOp, oUsr, usr)
}
}
}