1 files changed, 18 insertions, 0 deletions
diff --git a/aoc-2021-kotlin/src/Utils.kt b/aoc-2021-kotlin/src/Utils.kt
index 4f78a1f..2be34ac 100644
--- a/aoc-2021-kotlin/src/Utils.kt
+++ b/aoc-2021-kotlin/src/Utils.kt
@@ -26,6 +26,24 @@ data class Pos2D(val x: Int, val y: Int) {
     operator fun minus(other: Pos2D) = Pos2D(x - other.x, y - other.y)
 }
 
+data class Pos3D(val x: Int, val y: Int, val z: Int) {
+    companion object {
+        val zero = Pos3D(0, 0, 0)
+        val unique = Pos3D(1, 2, 3)
+
+        fun fromString(string: String) = string
+            .split(",")
+            .map(String::toInt)
+            .let { Pos3D(it[0], it[1], it[2]) }
+    }
+
+    operator fun unaryMinus() = Pos3D(-x, -y, -z)
+
+    operator fun plus(other: Pos3D) = Pos3D(x + other.x, y + other.y, z + other.z)
+
+    operator fun minus(other: Pos3D) = Pos3D(x - other.x, y - other.y, z - other.z)
+}
+
 fun parseToMap(input: List<String>): Map<Pos2D, Int> =
     input.flatMapIndexed { y, line ->
         line.mapIndexed { x, char ->