Merge pull request #5758 from milkinllc/fix_vector_scale_commutativeness

Fix vector scale commutativeness

src/Avalonia.Visuals/Vector.cs

@@ -82,6 +82,15 @@ namespace Avalonia
         public static Vector operator *(Vector vector, double scale)
             => Multiply(vector, scale);
 
+        /// <summary>
+        /// Scales a vector.
+        /// </summary>
+        /// <param name="vector">The vector.</param>
+        /// <param name="scale">The scaling factor.</param>
+        /// <returns>The scaled vector.</returns>
+        public static Vector operator *(double scale, Vector vector)
+            => Multiply(vector, scale);
+
         /// <summary>
         /// Scales a vector.
         /// </summary>

tests/Avalonia.Visuals.UnitTests/VectorTests.cs

@@ -105,5 +105,15 @@ namespace Avalonia.Visuals.UnitTests
 
             Assert.Equal(expected, Vector.Multiply(vector, 2));
         }
+
+        [Fact]
+        public void Scale_Vector_Should_Be_Commutative()
+        {
+            var vector = new Vector(10, 2);
+
+            var expected = vector * 2;
+
+            Assert.Equal(expected, 2 * vector);
+        }
     }
 }