feat: move func to calc package

game/internal/controller/ship_group_send.go

@@ -1,8 +1,7 @@
 package controller
 
 import (
-	"galaxy/util"
-
+	"galaxy/calc"
 	e "galaxy/error"
 
 	"galaxy/game/internal/model/game"
@@ -47,7 +46,7 @@ func (c *Cache) shipGroupSend(ri int, groupID uuid.UUID, planetNumber uint) erro
 	if !ok {
 		return e.NewEntityNotExistsError("destination planet #%d", planetNumber)
 	}
-	rangeToDestination := util.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X.F(), p1.Y.F(), p2.X.F(), p2.Y.F())
+	rangeToDestination := calc.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X.F(), p1.Y.F(), p2.X.F(), p2.Y.F())
 	if rangeToDestination > c.g.Race[ri].FlightDistance() {
 		return e.NewSendUnreachableDestinationError("range=%.03f", rangeToDestination)
 	}