I was following codezealot's tutorial on SAT and MTV and trying to implement it myself but I've come a cropper when it comes to getting the correct MTV. Here is my example: (Cue pretty pictures...)
I'm well aware how to obtain the length of the MTV and the axis on which it lies. However I can't work out whether the length should be 'positive' or 'negative' to push the object in the correct direction.
In the example we are separating the objects by moving the 'red' of the 'blue', the top example is moving the object negatively and the bottom moving it positively.
Please help I'm really struggling with this.