Matrix4: Reverting to previous multiplyMatrices.

src/math/Matrix4.js

@@ -369,44 +369,46 @@ Object.assign( Matrix4.prototype, {
 
 	},
 
-	multiplyMatrices: ( function () {
-	
-		var e = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ];
-		
-		return function ( a, b ) {
-			
-			var ae = a.elements;
-			var be = b.elements;
-			var te = this.elements;
-			
-			e[ 0 ] = ae[ 0 ] * be[ 0 ] + ae[ 4 ] * be[ 1 ] + ae[ 8 ] * be[ 2 ] + ae[ 12 ] * be[ 3 ];
-			e[ 4 ] = ae[ 0 ] * be[ 4 ] + ae[ 4 ] * be[ 5 ] + ae[ 8 ] * be[ 6 ] + ae[ 12 ] * be[ 7 ];
-			e[ 8 ] = ae[ 0 ] * be[ 8 ] + ae[ 4 ] * be[ 9 ] + ae[ 8 ] * be[ 10 ] + ae[ 12 ] * be[ 11 ];
-			e[ 12 ] = ae[ 0 ] * be[ 12 ] + ae[ 4 ] * be[ 13 ] + ae[ 8 ] * be[ 14 ] + ae[ 12 ] * be[ 15 ];
-			
-			e[ 1 ] = ae[ 1 ] * be[ 0 ] + ae[ 5 ] * be[ 1 ] + ae[ 9 ] * be[ 2 ] + ae[ 13 ] * be[ 3 ];
-			e[ 5 ] = ae[ 1 ] * be[ 4 ] + ae[ 5 ] * be[ 5 ] + ae[ 9 ] * be[ 6 ] + ae[ 13 ] * be[ 7 ];
-			e[ 9 ] = ae[ 1 ] * be[ 8 ] + ae[ 5 ] * be[ 9 ] + ae[ 9 ] * be[ 10 ] + ae[ 13 ] * be[ 11 ];
-			e[ 13 ] = ae[ 1 ] * be[ 12 ] + ae[ 5 ] * be[ 13 ] + ae[ 9 ] * be[ 14 ] + ae[ 13 ] * be[ 15 ];
-			
-			e[ 2 ] = ae[ 2 ] * be[ 0 ] + ae[ 6 ] * be[ 1 ] + ae[ 10 ] * be[ 2 ] + ae[ 14 ] * be[ 3 ];
-			e[ 6 ] = ae[ 2 ] * be[ 4 ] + ae[ 6 ] * be[ 5 ] + ae[ 10 ] * be[ 6 ] + ae[ 14 ] * be[ 7 ];
-			e[ 10 ] = ae[ 2 ] * be[ 8 ] + ae[ 6 ] * be[ 9 ] + ae[ 10 ] * be[ 10 ] + ae[ 14 ] * be[ 11 ];
-			e[ 14 ] = ae[ 2 ] * be[ 12 ] + ae[ 6 ] * be[ 13 ] + ae[ 10 ] * be[ 14 ] + ae[ 14 ] * be[ 15 ];
-			
-			e[ 3 ] = ae[ 3 ] * be[ 0 ] + ae[ 7 ] * be[ 1 ] + ae[ 11 ] * be[ 2 ] + ae[ 15 ] * be[ 3 ];
-			e[ 7 ] = ae[ 3 ] * be[ 4 ] + ae[ 7 ] * be[ 5 ] + ae[ 11 ] * be[ 6 ] + ae[ 15 ] * be[ 7 ];
-			e[ 11 ] = ae[ 3 ] * be[ 8 ] + ae[ 7 ] * be[ 9 ] + ae[ 11 ] * be[ 10 ] + ae[ 15 ] * be[ 11 ];
-			e[ 15 ] = ae[ 3 ] * be[ 12 ] + ae[ 7 ] * be[ 13 ] + ae[ 11 ] * be[ 14 ] + ae[ 15 ] * be[ 15 ];
-			
-			for ( var i = 0; i < 16; i ++ ) te[ i ] = e[ i ];
-			
-			return this;
-			
-		};
-		
-	} )(),
-	
+	multiplyMatrices: function ( a, b ) {
+
+		var ae = a.elements;
+		var be = b.elements;
+		var te = this.elements;
+
+		var a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];
+		var a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];
+		var a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];
+		var a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];
+
+		var b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];
+		var b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];
+		var b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];
+		var b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];
+
+		te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
+		te[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
+		te[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
+		te[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
+
+		te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
+		te[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
+		te[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
+		te[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
+
+		te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
+		te[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
+		te[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
+		te[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
+
+		te[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
+		te[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
+		te[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
+		te[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
+
+		return this;
+
+	},
+
 	multiplyToArray: function ( a, b, r ) {
 
 		var te = this.elements;