test dw distances

pkg/model/game/ship.go

@@ -1,6 +1,10 @@
 package game
 
-import "math"
+import (
+	"math"
+
+	"github.com/iliadenisov/galaxy/pkg/number"
+)
 
 type Ship struct {
 	TypeName string
@@ -103,7 +107,7 @@ func (sg ShipGroup) BombingPower() float64 {
 		sg.Weapons *
 		float64(sg.Type.Armament) *
 		float64(sg.Number)
-	return toFixed3(result)
+	return number.Fixed3(result)
 }
 
 // TODO: test this
@@ -116,17 +120,3 @@ func (fl Fleet) Speed() float64 {
 	}
 	return result
 }
-
-func toFixed3(num float64) float64 {
-	return toFixed(num, 3)
-}
-
-// TODO: move to more common place
-func toFixed(num float64, precision int) float64 {
-	output := math.Pow(10, float64(precision))
-	return float64(round(num*output)) / output
-}
-
-func round(num float64) int {
-	return int(num + math.Copysign(0.5, num))
-}