Cheat Engine

[Chickenmelon]

I'm playing Jak II on PCSX2 emulator and I'm trying to create a cheat to fly in the air. I was unsuccessful in finding the Z-axis position address.

But I managed to find the adress with Z-axis acceleration. After jumping, I NOP the adress that writes to it, so my character keeps getting higher into the air. However, while this code is NOP'ed, I can only see the sky, everything else becomes invisible. After a while, I restore with original code, and my character starts to fall down from the sky.

This method allowed me to get into unaccessible places high in the air. However, I would still like to learn how to fly in the air, instead of accelerating up and down.

Can I have some help with doing that?

[Dark Byte]

instead of nop use a code that freezes acceleration to 0

[Chickenmelon]

How do I freeze acceleration to 0?
Here is the adress which I usually NOP to get high into the air:

[++METHOS]

Think of it as gravity force. If you have 0 gravity, you will continue to rise in to the air when you jump, right? Well, if you have the address/function that handles that gravity force value, and you lock that value to 0, then your character will just keep rising, until you return gravity to normal (in theory).

What DB is suggesting, is, instead of NOP'ing the instruction that is also handling those other things (like visual addresses that cause you to only see the sky), just lock that single gravity value to 0 (or whatever).

You can do this by adding that address to your cheat table and freezing it (not preferred), or, by injecting code and writing a script that will ONLY affect that gravity value and lock it to 0 (preferred) for a given amount of time, or only while a key/button is being pressed etc..

That said, I would not use this approach to make a fly cheat. This would be good for writing other cheats, such as moon gravity or super jump etc., however.

If you want to write a fly cheat, focus on finding the XZY coordinates of your hero character. From there, you may have to nop whatever function is applying vertical forces to your character (easy to find by nop'ing each instruction, one-by-one, that accesses your vertical axis, then checking to see if your character still tries to fall to the ground while that vertical axis is frozen at a higher-than-ground elevation), and just write a script that will allow you to alter the XZY of your character while those particular forces have been eliminated (for your hero character).