diff --git a/binaries/data/mods/public/globalscripts/vector.js b/binaries/data/mods/public/globalscripts/vector.js
index e9c23a5433..9bac1ed091 100644
--- a/binaries/data/mods/public/globalscripts/vector.js
+++ b/binaries/data/mods/public/globalscripts/vector.js
@@ -91,12 +91,29 @@ Vector2D.prototype.rotate = function(a)
 //
 // These methods serve to get numeric info on the vector, they don't modify the vector
 
+/**
+ * Return the vector that forms a right angle with this one.
+ */
+Vector2D.prototype.perpendicular = function()
+{
+	return new Vector2D(-this.y, this.x);
+};
+
+/**
+ * Computes the scalar product of the two vectors.
+ * Geometrically, this is the product of the length of the two vectors and the cosine of the angle between them.
+ * If the vectors are orthogonal, the product is zero.
+ */
 Vector2D.prototype.dot = function(v)
 {
 	return this.x * v.x + this.y * v.y;
 };
 
-// get the non-zero coordinate of the vector cross
+/**
+ * Computes the non-zero coordinate of the cross product of the two vectors.
+ * Geometrically, the cross of the vectors is the 3D vector perpendicular to the two 2D vectors.
+ * This returned length of that vector equals the area of the parallelogram that the vectors span.
+ */
 Vector2D.prototype.cross = function(v)
 {
 	return this.x * v.y - this.y * v.x;
@@ -259,6 +276,18 @@ Vector3D.prototype.dot = function(v)
 	return this.x * v.x + this.y * v.y + this.z * v.z;
 };
 
+/**
+ * Returns a vector perpendicular to the two given vectors.
+ * The length of the returned vector corresponds to the area of the parallelogram with the vectors for sides.
+ */
+Vector3D.prototype.cross = function(v)
+{
+	return new Vector3D(
+		this.y * v.z - this.z * v.y,
+		this.z * v.x - this.x * v.z,
+		this.x * v.y - this.y * v.x);
+};
+
 Vector3D.prototype.lengthSquared = function()
 {
 	return this.dot(this);
diff --git a/binaries/data/mods/public/simulation/components/tests/test_Vector.js b/binaries/data/mods/public/simulation/components/tests/test_Vector.js
index c70e35bd55..d70f9a5439 100644
--- a/binaries/data/mods/public/simulation/components/tests/test_Vector.js
+++ b/binaries/data/mods/public/simulation/components/tests/test_Vector.js
@@ -86,6 +86,14 @@ var brokenVector = {
 	TS_ASSERT_EQUALS(v5.x, v6.x);
 	TS_ASSERT_EQUALS(v5.y, v6.y);
 	TS_ASSERT(Math.abs(v5.dot(v6.rotate(Math.PI / 2))) < epsilon);
+
+	let v7 = new Vector2D(4, 5).perpendicular();
+	TS_ASSERT_EQUALS(v7.x, -5);
+	TS_ASSERT_EQUALS(v7.y, 4);
+
+	let v8 = new Vector2D(0, 0).perpendicular();
+	TS_ASSERT_EQUALS(v8.x, 0);
+	TS_ASSERT_EQUALS(v8.y, 0);
 }
 
 // Test Vector3D
@@ -106,4 +114,9 @@ var brokenVector = {
 	TS_ASSERT_EQUALS(v3.x, v4.x);
 	TS_ASSERT_EQUALS(v3.y, v4.y);
 	TS_ASSERT_EQUALS(v3.z, v4.z);
+
+	let v5 = new Vector3D(1, 2, 3).cross(new Vector3D(4, 5, 6));
+	TS_ASSERT_EQUALS(v5.x, -3);
+	TS_ASSERT_EQUALS(v5.y, 6);
+	TS_ASSERT_EQUALS(v5.z, -3);
 }