GTA Vice City Plugin Development

Hi

Maybe you know me by "Plugin for Initial D Special Stage" and by a lot of question regarding to Wiper motors and physics in general . Now i'm in a adventure to make plugin for another game that maybe is not very accurate for a motion sim.

I'm talking about Grand Theft Auto Vice City (my favourite GTA of all), but at least I have some documentation for this.

I have this wiki http://www.gtamodding.com/wiki/Memory_Addresses_(VC) and this post http://gtaforums.com/topic/117195-documenting-gta3vc-memory-addresses/page-35#entry1060799390 which has a lot of info regarding to manipulate the game by memory addresses. The Vehicle Block section has info regarding to the car. By now i've used cheat engine to test this address

0x7E49C0 - Pointer of player's car +

• 0x04 - X Roll
• 0x08 - Y Roll
• 0x0C - Z Roll
• 0x14 - X Direction
• 0x18 - Y Direction
• 0x1C - Z Direction
• 0x24 - Last X Direction
• 0x28 - Last Y Direction
• 0x2C - Last Z Direction
• 0x34 - X Position
• 0x38 - Y Position
• 0x3C - Z Position

I understand roll as the rotation of the vehicle, direction is the orientation of the vehicle and position its the cartesian coordinate system on the game.

Reading this post http://www.xsimulator.net/community/threads/gta5-plugin-help-pleeeease.8027/ I've got the same problem as @SilentChill, I can't have an stable value, I have big changes when i go uphill in different sectors for example. Maybe i have to follow @value1 advice and try to figure out how to get the transformation matrix and code it on the plugin.

Fun Fact:

0x7E49C0 is the Vehicle Pointer
0x94AD28 is the Ped Pointer

When the player is not in a car, the vehicle pointer changes to the ped pointer, and the X and Y values for Roll and Direction acts like the X and Y cam direction. But i don't think that will be significant for the plugin in SimTools.

As always, any help will be appreciated, if you need screenshots please tell it. I'm still researching about PCSX2, Cheat Engine and wiper motors, but i'm in a good way in that, so I can have any news soon

Hiya mate, all those addresses are just for calling the information in game you can't use them for Simtools, well I couldn't do anything with them in GTA5.

Only way is to call the information on screen when playing the game then search for the float values in cheat engine. Its a long process but you should be able to find the rotation matrix.

If you get the value for roll on screen make sure you convert it from degrees to radians as that is what is used in the float values, thats how I did it in GTA5

That's an option to use a tool to display the float values on screen. The bad thing is the game is kinda old, so trying to find a tool to display the values I'm looking for it more difficult that trying to find something in cheat engine.

If there's another way to find the correct value without any other tool cheat engine.....

http://www.gtainside.com/en/vicecity/tools/467-player-pos/

Oh, look what i've found. Maybe this will be helpful.

PS: I'm kinda sleepy so i'm going to bed.

Yeah I used a player position mod for GTA5 to get the values to search in cheat engine

Well', i've got the player posotion via Cheat Engine. If I modify the value I can change it position ingame. Now i'm trying to get working the rotation (or direction) values. Maybe is that what @value1 was saying in the other topic with the transformation matrix