Note matrix must be affine in Vector3.applyMatrix4

docs/api/math/Vector3.html

@@ -122,6 +122,8 @@ e, f, g,
 i, j, k,
 m, n, o
 		</code>
+		Note that the input matrix [page:Matrix4 m] is assumed to be
+		[link:https://en.wikipedia.org/wiki/Affine_transformation affine].
 		</div>
 
 		<h3>[method:Vector3 applyProjection]( [page:Matrix4 m] )</h3>