From 16666055baa885b47ec293606341229817025ac3 Mon Sep 17 00:00:00 2001
From: DBotThePony <dbotthepony@yandex.ru>
Date: Thu, 29 Feb 2024 10:48:39 +0700
Subject: [PATCH] 2D cross product

---
 gradle.properties                             |  2 +-
 .../ru/dbotthepony/kommons/vector/Vector2d.kt | 21 +++++++++++++++++++
 .../ru/dbotthepony/kommons/vector/Vector2f.kt | 21 +++++++++++++++++++
 .../ru/dbotthepony/kommons/vector/Vector2i.kt | 21 +++++++++++++++++++
 4 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/gradle.properties b/gradle.properties
index 2db2647..c980a9f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=2.9.15
+projectVersion=2.9.16
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9
diff --git a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2d.kt b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2d.kt
index 0583273..832e2cf 100644
--- a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2d.kt
+++ b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2d.kt
@@ -111,6 +111,27 @@ data class Vector2d(
 
 	operator fun unaryMinus(): Vector2d = Vector2d(-x, -y)
 
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2d): Double {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2f): Double {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2i): Double {
+		return x * other.component2() - other.component1() * y
+	}
+
 	fun dot(x: Double, y: Double) = this.x * x + this.y * y
 	fun dot(value: IStruct2d): Double { val (x, y) = value; return dot(x, y) }
 	fun dot(value: Vector2d): Double { val (x, y) = value; return dot(x, y) }
diff --git a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2f.kt b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2f.kt
index 09e4fb8..58a3c53 100644
--- a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2f.kt
+++ b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2f.kt
@@ -111,6 +111,27 @@ data class Vector2f(
 
 	operator fun unaryMinus(): Vector2f = Vector2f(-x, -y)
 
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2f): Float {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2i): Float {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2d): Double {
+		return x * other.component2() - other.component1() * y
+	}
+
 	fun dot(x: Float, y: Float) = this.x * x + this.y * y
 	fun dot(value: IStruct2f): Float { val (x, y) = value; return dot(x, y) }
 	fun dot(value: Vector2f): Float { val (x, y) = value; return dot(x, y) }
diff --git a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2i.kt b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2i.kt
index 719191a..3cf5be6 100644
--- a/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2i.kt
+++ b/linear-algebra/src/main/kotlin/ru/dbotthepony/kommons/vector/Vector2i.kt
@@ -88,6 +88,27 @@ data class Vector2i(
 
 	operator fun unaryMinus(): Vector2i = Vector2i(-x, -y)
 
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2f): Float {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2i): Int {
+		return x * other.component2() - other.component1() * y
+	}
+
+	/**
+	 * 2D vector cross product (Z coordinate)
+	 */
+	fun cross(other: IStruct2d): Double {
+		return x * other.component2() - other.component1() * y
+	}
+
 	fun dot(x: Int, y: Int) = this.x * x + this.y * y
 	fun dot(value: IStruct2i): Int { val (x, y) = value; return dot(x, y) }
 	fun dot(value: Vector2i): Int { val (x, y) = value; return dot(x, y) }