Okay, putting in a negative gravity breaks it.
But why should it?
I want to use the gravity to get nice deceleration and acceleration on an object. It's by far the quickest way to get the desired effect.
But gravity is always down. which I don't always want. Why shouldn't I be allowed to change the direction of gravity at will?
All I want is to be able to create something which moves upwards, decelerates until it stops at the peak, then accelerates downwards. Which is exactly what the pinball behaviour does.
But... Once it reaches it's starting point, I basically want it to do the exact same thing, but upside down.
i.e. move downwards, slowing down until it stops at the bottom, then accelerate upwards to return back to the starting point.
effectively a sine wave movement without and X component.
Bouncing or reversing doesn't produce the same deceleration effect.
It seems like it should be easy to do, if I could enter a negative gravity, then, logically (in my head) that'd do it.
But even better, why can't I just specify the direction of gravity.
I could make a Loco Roco style game then easy.
It seems like I am being stopped from doing this because gravity in real life doesn't go negative, well, I don't care, it'd be very useful and time saving to be able to do it.
/end of rant. I really like MMF2, but I always feel like I'm having to fight the program to get it to do what I want.