Speed of rockets?

[antimonycat]

Is it possible to change the velocities of the rockets in SA (the RPG weapons and the ones on the Hydra/Hunter) or is it hardcoded?

[Zyo]

I use GTASA ultimate editor and when editing specific weapon stats there is a field called "speed". According to the readme file this affects projectile velocity. I haven't experimented with it yet (and do not plan to), but this readme suggests that you can.

 

 

If I was going to experiment, this is what i would do

 

The data can be found in folder:

Rockstar Games\GTA San Andreas\data

filename:

weapon.dat

 

rocketlauncher properties are as follows

$ RLAUNCHER PROJECTILE 50.0 55.0 359 -1 7 rocket 1 75 0.42 0.0 0.05 1 0 1.0 1.0 11 19 12 (14) 99 15 99 48214

 

I have bracketed the relevant number to highlight it - the brackets do not belong in the line.

 

The number 14 represents the "speed" stat of the rocket launcher. I have noticed that other weapons eg 9mm have speed stats of about 6. If you want to change the speed of the rockets i suggest you alter this number to a higher/lower one.

 

Good luck, and let us know what happens if you try this.

[pinky]

I use GTASA ultimate editor and when editing specific weapon stats there is a field called "speed". According to the readme file this affects projectile velocity. I haven't experimented with it yet (and do not plan to), but this readme suggests that you can.

 

 

If I was going to experiment, this is what i would do

 

The data can be found in folder:

Rockstar Games\GTA San Andreas\data

filename:

weapon.dat

 

rocketlauncher properties are as follows

$ RLAUNCHER PROJECTILE 50.0 55.0 359 -1 7 rocket 1 75 0.42 0.0 0.05 1 0 1.0 1.0 11 19 12 (14) 99 15 99 48214

 

I have bracketed the relevant number to highlight it - the brackets do not belong in the line.

 

The number 14 represents the "speed" stat of the rocket launcher. I have noticed that other weapons eg 9mm have speed stats of about 6. If you want to change the speed of the rockets i suggest you alter this number to a higher/lower one.

 

Good luck, and let us know what happens if you try this.

I think that is just the speed for a part of the animation as i have been trying to up rocket speed for a long time to no avail.

I am sure it is exe controlled.

[Zyo]

Ok I went ahead and tested my theory. Turns out that changing the "speed" data does not affect the speed of the projectile.

 

Guess you can't always trust the readme file.

 

Here's what it says

 

"Speed

This is the speed that the weapons ammo moves at."

 

[pinky]

Ok I went ahead and tested my theory. Turns out that changing the "speed" data does not affect the speed of the projectile.

 

Guess you can't always trust the readme file.

 

Here's what it says

 

"Speed

This is the speed that the weapons ammo moves at."

Yeah, thought so. Been trying to increase thier speed since I started using the SCM hook to remove the aircraft speed limit, thye missiles can't keep up and make dogfighting pointless.

[Sacky]

You should be able to adjust the speed by modifying a constant float within the memory, simply breakpoint the rocket structure and look at where the x/y/z values are being read and written to.

 

(I took the liberty of doing it for you:)

 

X Values:

 

0x56A4BC (Read)

0x15611B7 (Read)

0x739826 (Write)

 

So this is the part where it writes the x/y/z values:

 

 

.text:00739826 mov    [ebx], eax                      ; RocketX

.text:00739828 mov    ecx, [esi+4]

.text:0073982B mov    eax, [esp+144h+var_C8]

.text:0073982F mov    [ebx+4], ecx                    ; RocketY

.text:00739832 mov    edx, [esi+8]

.text:00739835 mov    [ebx+8], edx                    ; RocketZ

 

EDIT:

 

OK this is the value you need to change:

 

 

.text:00738FAD fmul    ds:Gravity

 

If you NOP this line (6 bytes) the rocket flys at virtually unlimited speed , but then again you can't just modify the whole gravity float to just get a decent rocket velocity can you? Well I can show you a way around that, I'll just write up some code now...

 

 

float* fNewGrav = (float*) malloc(sizeof(float));*fNewGrav = 0.008f; // Modify this to change the missile velocityDWORD dwPtr = (DWORD) fNewGrav;char* cBytes = (char*)&fNewGrav;BYTE bChange[] = { cBytes[0], cBytes[1], cBytes[2], cBytes[3] };Patch(0x738FAF,bChange);

 

 

Very interesting to see the missiles fly at really fast and slow speeds

Edited March 8, 2008 by Sacky

[jackusCTB]

Sorry for the MASSIVE bump, but I find this thread very interesting. Is there a way to apply Sacky's script? Thanks.