feat: move func to calc package

.claude/scheduled_tasks.lock

@@ -1 +0,0 @@
-{"sessionId":"eb7ac833-18c4-4e5b-a2c0-a53f3599c55b","pid":31048,"procStart":"Wed May  6 22:37:00 2026","acquiredAt":1778147404017}

game/internal/controller/fleet_send.go

@@ -1,8 +1,7 @@
 package controller
 
 import (
-	"galaxy/util"
+	"galaxy/calc"
-
 	e "galaxy/error"
 
 	"galaxy/game/internal/model/game"
@@ -25,7 +24,7 @@ func (c *Cache) FleetSend(ri, fi int, planetNumber uint) error {
 	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)
 	}

game/internal/controller/report.go

@@ -9,8 +9,6 @@ import (
 	"galaxy/calc"
 	mr "galaxy/model/report"
 
-	"galaxy/util"
-
 	"galaxy/game/internal/model/game"
 
 	"github.com/google/uuid"
@@ -94,7 +92,7 @@ func (c *Cache) InitReport(t uint) *mr.Report {
 			}
 			for pi := range c.g.Map.Planet {
 				p2 := &c.g.Map.Planet[pi]
-				distance := util.ShortDistance(c.g.Map.Width, c.g.Map.Height, sg.StateInSpace.X.F(), sg.StateInSpace.Y.F(), p2.X.F(), p2.Y.F())
+				distance := calc.ShortDistance(c.g.Map.Width, c.g.Map.Height, sg.StateInSpace.X.F(), sg.StateInSpace.Y.F(), p2.X.F(), p2.Y.F())
 				report.InSpaceGroupRangeCache[sgi][p2.Number] = distance
 			}
 		} else {
@@ -396,7 +394,7 @@ func (c *Cache) ReportIncomingGroup(ri int, rep *mr.Report) {
 			continue
 		}
 
-		distance := util.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X.F(), p1.Y.F(), p2.X.F(), p2.Y.F())
+		distance := calc.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X.F(), p1.Y.F(), p2.X.F(), p2.Y.F())
 		var speed, mass float64
 		if sg.FleetID != nil {
 			speed, mass = c.FleetSpeedAndMass(c.MustFleetIndex(*sg.FleetID))
@@ -597,7 +595,7 @@ func (c *Cache) ReportLocalFleet(ri int, rep *mr.Report) {
 		if inSpace, ok := fleetState.InSpace(); ok {
 			rep.LocalFleet[i].Origin = &inSpace.Origin
 			p2 := c.MustPlanet(rep.LocalFleet[i].Destination)
-			rangeToDestination := mr.F(util.ShortDistance(c.g.Map.Width, c.g.Map.Height, inSpace.X.F(), inSpace.Y.F(), p2.X.F(), p2.Y.F()))
+			rangeToDestination := mr.F(calc.ShortDistance(c.g.Map.Width, c.g.Map.Height, inSpace.X.F(), inSpace.Y.F(), p2.X.F(), p2.Y.F()))
 			rep.LocalFleet[i].Range = &rangeToDestination
 		}
 		i++
@@ -726,7 +724,7 @@ func (c *Cache) otherGroup(v *mr.OtherGroup, sg *game.ShipGroup, st *game.ShipTy
 	if sg.State() == game.StateInSpace {
 		v.Origin = &sg.StateInSpace.Origin
 		p2 := c.MustPlanet(v.Destination)
-		rangeToDestination := mr.F(util.ShortDistance(c.g.Map.Width, c.g.Map.Height, sg.StateInSpace.X.F(), sg.StateInSpace.Y.F(), p2.X.F(), p2.Y.F()))
+		rangeToDestination := mr.F(calc.ShortDistance(c.g.Map.Width, c.g.Map.Height, sg.StateInSpace.X.F(), sg.StateInSpace.Y.F(), p2.X.F(), p2.Y.F()))
 		v.Range = &rangeToDestination
 	}
 	v.Speed = mr.F(sg.Speed(st))

game/internal/controller/route.go

@@ -8,7 +8,7 @@ import (
 	"math/rand/v2"
 	"slices"
 
-	"galaxy/util"
+	"galaxy/calc"
 
 	e "galaxy/error"
 
@@ -28,7 +28,7 @@ func (c *Cache) PlanetRouteSet(ri int, rt game.RouteType, origin, destination ui
 	if !ok {
 		return e.NewEntityNotExistsError("destination planet #%d", destination)
 	}
-	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 max=%.03f", rangeToDestination, c.g.Race[ri].FlightDistance())
 	}
@@ -194,7 +194,7 @@ func (c *Cache) RemoveUnreachableRoutes() {
 		ri := c.RaceIndex(*p1.Owner)
 		for rt, destination := range p1.Route {
 			p2 := c.MustPlanet(destination)
-			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() {
 				delete(p1.Route, rt)
 			}

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)
 	}

game/internal/generator/map.go

@@ -4,8 +4,7 @@ import (
 	"fmt"
 	"math/rand"
 
-	"galaxy/util"
+	"galaxy/calc"
-
 	"galaxy/game/internal/generator/plotter"
 )
 
@@ -59,7 +58,7 @@ func (m Map) NewCoordinate(deadZoneRaduis float64) (Coordinate, error) {
 }
 
 func (m Map) ShortDistance(from, to Coordinate) float64 {
-	return util.ShortDistance(m.Width, m.Height, from.X, from.Y, to.X, to.Y)
+	return calc.ShortDistance(m.Width, m.Height, from.X, from.Y, to.X, to.Y)
 }
 
 // RandI returns a random float64 value between min and max

pkg/calc/map.go

@@ -0,0 +1,20 @@
+package calc
+
+import "math"
+
+// shortest distance between points on torus map
+func ShortDistance(w, h uint32, x1, y1, x2, y2 float64) float64 {
+	return math.Hypot(Deltas(w, h, x1, y1, x2, y2))
+}
+
+func Deltas(w, h uint32, x1, y1, x2, y2 float64) (float64, float64) {
+	dx := math.Abs(x2 - x1)
+	dy := math.Abs(y2 - y1)
+	if dx > float64(w/2) {
+		dx = float64(h) - dx
+	}
+	if dy > float64(h/2) {
+		dy = float64(h) - dy
+	}
+	return dx, dy
+}

pkg/util/map.go

@@ -1,6 +1,9 @@
 package util
 
-import "math"
+import (
+	"galaxy/calc"
+	"math"
+)
 
 // WrapF maps value into the half-open interval [0, float64(size)).
 // It supports negative input values and is used for torus coordinates
@@ -28,12 +31,8 @@ func WrapF(value float64, size int) float64 {
 	return r
 }
 
-func ShortDistance(w, h uint32, x1, y1, x2, y2 float64) float64 {
-	return math.Hypot(deltas(w, h, x1, y1, x2, y2))
-}
-
 func NextTravelCoord(w, h uint32, x1, y1, x2, y2, delta float64) (float64, float64, bool) {
-	deltaX, deltaY := deltas(w, h, x1, y1, x2, y2)
+	deltaX, deltaY := calc.Deltas(w, h, x1, y1, x2, y2)
 	distance := math.Hypot(deltaX, deltaY)
 	if distance <= delta {
 		return x2, y2, true
@@ -93,15 +92,3 @@ func NextTravelCoord(w, h uint32, x1, y1, x2, y2, delta float64) (float64, float
 
 	return tx, ty, false
 }
-
-func deltas(w, h uint32, x1, y1, x2, y2 float64) (float64, float64) {
-	dx := math.Abs(x2 - x1)
-	dy := math.Abs(y2 - y1)
-	if dx > float64(w/2) {
-		dx = float64(h) - dx
-	}
-	if dy > float64(h/2) {
-		dy = float64(h) - dy
-	}
-	return dx, dy
-}

pkg/util/map_test.go

@@ -5,6 +5,7 @@ import (
 	"math"
 	"testing"
 
+	"galaxy/calc"
 	"galaxy/util"
 
 	"github.com/stretchr/testify/assert"
@@ -22,7 +23,7 @@ func TestShortDistance(t *testing.T) {
 		{10, 10, 8, 7, 1, 7, 3.},
 	} {
 		t.Run(fmt.Sprint(i), func(t *testing.T) {
-			d := util.ShortDistance(tc.w, tc.h, tc.x1, tc.y1, tc.x2, tc.y2)
+			d := calc.ShortDistance(tc.w, tc.h, tc.x1, tc.y1, tc.x2, tc.y2)
 			assert.Equal(t, tc.d, util.Fixed3(d))
 		})
 	}