Vector3: Simplified applyMatrix4().

src/math/Vector3.js

@@ -280,12 +280,13 @@ Object.assign( Vector3.prototype, {
 		var x = this.x, y = this.y, z = this.z;
 		var e = m.elements;
 
-		this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ]  * z + e[ 12 ];
-		this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ]  * z + e[ 13 ];
-		this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ];
-		var w =  e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ];
+		var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );
 
-		return this.divideScalar( w );
+		this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ]  * z + e[ 12 ] ) * w;
+		this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ]  * z + e[ 13 ] ) * w;
+		this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;
+
+		return this;
 
 	},