From 0abcd22728d1024cc2d6072805b69ed373af4c2f Mon Sep 17 00:00:00 2001
From: yairm210 <yairm210@hotmail.com>
Date: Tue, 15 Jul 2025 23:44:04 +0300
Subject: [PATCH] chore: Hexmath purity

---
 build.gradle.kts                        | 3 +++
 core/src/com/unciv/logic/map/HexMath.kt | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/build.gradle.kts b/build.gradle.kts
index b37d8cd870..9548d3a0ec 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -49,6 +49,9 @@ allprojects {
     configure<yairm210.purity.PurityConfiguration>{
         wellKnownPureFunctions = setOf(
             "com.unciv.logic.civilization.diplomacy.RelationshipLevel.compareTo",
+            "kotlin.math.max",
+            "kotlin.math.min",
+            "kotlin.math.abs"
         )
         wellKnownReadonlyFunctions = setOf(
             // Looks like the Collection.contains is not considered overridden :thunk:
diff --git a/core/src/com/unciv/logic/map/HexMath.kt b/core/src/com/unciv/logic/map/HexMath.kt
index 3dea1c896c..843ec07ca9 100644
--- a/core/src/com/unciv/logic/map/HexMath.kt
+++ b/core/src/com/unciv/logic/map/HexMath.kt
@@ -232,10 +232,12 @@ object HexMath {
     }
 
     /** Get number of hexes from [origin] to [destination] _without respecting world-wrap_ */
+    @Pure
     fun getDistance(origin: Vector2, destination: Vector2): Int {
         return getDistance(origin.x.toInt(), origin.y.toInt(), destination.x.toInt(), destination.y.toInt())
     }
-    
+
+    @Pure
     fun getDistance(originX: Int, originY: Int, destinationX: Int, destinationY: Int): Int {
         val relativeX = originX - destinationX
         val relativeY = originY - destinationY