full left-to-right order in matrix x vector multiplication

2 files changed, 4 insertions, 4 deletions

diff --git a/AudioTester/Program.cs b/AudioTester/Program.cs
index 7557142..14212af 100644
--- a/AudioTester/Program.cs
+++ b/AudioTester/Program.cs
@@ -28,8 +28,8 @@ namespace AudioTester
 
                 for (int i = 0; i < array.Length; i++)
                 {
-                    g.DrawLine(background, (mat * array[i].a + new Vector2(1000, 1000)).GetPoint(), (mat * array[i].b + new Vector2(1000, 1000)).GetPoint());
-                    g.DrawLine(foreground, (mat * array[i].a + new Vector2(1000, 1000)).GetPoint(), (mat * array[i].b + new Vector2(1000, 1000)).GetPoint());
+                    g.DrawLine(background, (array[i].a * mat + new Vector2(1000, 1000)).GetPoint(), (array[i].b * mat + new Vector2(1000, 1000)).GetPoint());
+                    g.DrawLine(foreground, (array[i].a * mat + new Vector2(1000, 1000)).GetPoint(), (array[i].b * mat + new Vector2(1000, 1000)).GetPoint());
                 }
             }
 
diff --git a/RayRoom/Core/Matrix2x2.cs b/RayRoom/Core/Matrix2x2.cs
index 4a5639a..d2ef642 100644
--- a/RayRoom/Core/Matrix2x2.cs
+++ b/RayRoom/Core/Matrix2x2.cs
@@ -26,14 +26,14 @@ namespace AudioTester
 
         public readonly float Determinant => (a*d) - (b*c);
 
-        public static Vector2 operator*(Matrix2x2 matrix, Vector2 vector)
+        public static Vector2 operator*(Vector2 vector, Matrix2x2 matrix)
         {
             return new Vector2(matrix.a, matrix.c) * vector.X + new Vector2(matrix.b, matrix.d) * vector.Y;
         }
 
         public static Matrix2x2 operator*(Matrix2x2 a, Matrix2x2 b)
         {
-            return new Matrix2x2(b * new Vector2(a.a, a.c), b * new Vector2(a.b, a.d));
+            return new Matrix2x2(new Vector2(a.a, a.c) * b, new Vector2(a.b, a.d) * b);
         }
     }
 }
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