Use utility package

Author: tomas-novotny

go.mod

@@ -2,4 +2,7 @@ module github.com/gravitton/geometry
 
 go 1.25
 
-require github.com/gravitton/assert v0.5.0
+require (
+	github.com/gravitton/assert v0.5.0
+	github.com/gravitton/x v0.2.0
+)

go.sum

@@ -1,2 +1,4 @@
 github.com/gravitton/assert v0.5.0 h1:7HW4+nagmtDEI7ZMBjeZo/sBJTNnxtWGoVw/Vxe1VUU=
 github.com/gravitton/assert v0.5.0/go.mod h1:wQGHJvwsxQQ7qdX++NLofrI2cJvYIdJJtAo7A15qcAY=
+github.com/gravitton/x v0.2.0 h1:NZ1uyyHz/uyj2kO0JASCUfMsuIFZdAfiACV9DPJaUqE=
+github.com/gravitton/x v0.2.0/go.mod h1:ycNMdiA3TtMQmAZDgZ0pNeOl84eEKQ/coKyAdjCG8kQ=

internal/slices.go

@@ -1,6 +1,8 @@
 package geom
 
-import "github.com/gravitton/geometry/internal"
+import (
+	"github.com/gravitton/x/slices"
+)
 
 // Polygon is a 2D polygon with 3+ vertices.
 type Polygon[T Number] struct {
@@ -25,7 +27,7 @@ func (p Polygon[T]) Center() Point[T] {
 
 // Translate creates a new Polygon translated by the given vector (applied to all vertices).
 func (p Polygon[T]) Translate(vector Vector[T]) Polygon[T] {
-	return Polygon[T]{internal.Map(p.Vertices, func(e Point[T]) Point[T] {
+	return Polygon[T]{slices.Map(p.Vertices, func(e Point[T]) Point[T] {
 		return e.Add(vector)
 	})}
 }
@@ -38,15 +40,15 @@ func (p Polygon[T]) MoveTo(point Point[T]) Polygon[T] {
 // Scale creates a new Polygon uniformly scaled about its centroid by the factor.
 func (p Polygon[T]) Scale(factor float64) Polygon[T] {
 	center := p.Center()
-	return Polygon[T]{internal.Map(p.Vertices, func(point Point[T]) Point[T] {
+	return Polygon[T]{slices.Map(p.Vertices, func(point Point[T]) Point[T] {
 		return center.Add(point.Subtract(center).Multiply(factor))
 	})}
 }
 
 // ScaleXY creates a new Polygon scaled about its centroid by the factors.
 func (p Polygon[T]) ScaleXY(factorX, factorY float64) Polygon[T] {
 	center := p.Center()
-	return Polygon[T]{internal.Map(p.Vertices, func(point Point[T]) Point[T] {
+	return Polygon[T]{slices.Map(p.Vertices, func(point Point[T]) Point[T] {
 		return center.Add(point.Subtract(center).MultiplyXY(factorX, factorY))
 	})}
 }

polygon.go

@@ -1,6 +1,8 @@
 package geom
 
-import "fmt"
+import (
+	"fmt"
+)
 
 // Rectangle is a 2D axis-aligned rectangle represented by its center and size.
 type Rectangle[T Number] struct {

rectangle.go

@@ -2,7 +2,7 @@ package floats
 
 import (
 	geom "github.com/gravitton/geometry"
-	"github.com/gravitton/geometry/internal"
+	"github.com/gravitton/x/slices"
 )
 
 type Point = geom.Point[float64]
@@ -61,7 +61,7 @@ func ToRectangle[T geom.Number](rectangle geom.Rectangle[T]) Rectangle {
 }
 
 func Pol[T geom.Number](Vertices []geom.Point[T]) Polygon {
-	return Polygon{Vertices: internal.Map(Vertices, func(point geom.Point[T]) Point {
+	return Polygon{Vertices: slices.Map(Vertices, func(point geom.Point[T]) Point {
 		return ToPoint(point)
 	})}
 }

types/floats/types.go

@@ -2,7 +2,7 @@ package ints
 
 import (
 	geom "github.com/gravitton/geometry"
-	"github.com/gravitton/geometry/internal"
+	"github.com/gravitton/x/slices"
 )
 
 type Point = geom.Point[int]
@@ -64,7 +64,7 @@ func ToRectangle[T geom.Number](rectangle geom.Rectangle[T]) Rectangle {
 }
 
 func Pol[T geom.Number](Vertices []geom.Point[T]) Polygon {
-	return Polygon{Vertices: internal.Map(Vertices, func(point geom.Point[T]) Point {
+	return Polygon{Vertices: slices.Map(Vertices, func(point geom.Point[T]) Point {
 		return ToPoint(point)
 	})}
 }