Rotating joints

[legacy-Bigcheeese]

i am making an ah/64-d longbow apache and i need to beable to rotate the joint (rotors)

so

if (bDriving)
{
// what do i put here to rotate the joints
}
else
{
//what do i put here to make them stop???
}

thanks

[legacy-Mr Evil]

You want SetBoneRotation.

[legacy-Bigcheeese]

could you give me an example. or what file ut2004 uses to make the wheels turn on a vehicle?

[legacy-Mr Evil]

Here's an example from the Rocket Launcher code, where it's used to rotate the barrels as rockets are loaded:

simulated function UpdateBarrel(float dt)
{
    local Rotator R;

    BarrelRotation += dt * 65535.0 * BARREL_ROTATION_RATE / NUM_BARRELS;
    if (BarrelRotation > FinalRotation)
    {
        BarrelRotation = FinalRotation;
        bRotateBarrel = false;
    }

    R.Roll = BarrelRotation;
    SetBoneRotation('Bone_Barrel', R, 0, 1);
}

It is called every tick that the barrels are rotating. Search the source code for more examples, and look on the Wiki.

[legacy-Bigcheeese]

thanks for the info now i know what to look for.

[legacy-Bigcheeese]

mmm i did a search with Wotgreal and that wasnever used in anything super of the vehicles...

so is there any thing else?

[legacy-Mr Evil]

No, it's not used for any vehicles, but the principle is the same wherever it is used: Increment the rotation a bit every tick.

[legacy-Bigcheeese]

so inside the tick function i would do that?

also can i just incurment the rad by 1 or somthing then when it gets to 360 (65535) set it back to 0

like
int i;
i=0
function tick ()
{

if (i >= 65535)
i=0

i+=10
SetBoneRotation('Bone_Barrel', i, 0, 1);
}

i see that it has to be a rotaror but can you look at it and fix it plzz.

[legacy-Bigcheeese]

ok thats messed up so here is this and it compiled right

simulated function Tick(float DeltaTime)
{
SpinRotor();
}

simulated function spinRotor ()
{
local Rotator R;
local Rotator i;
i.roll=65535;

if (R.roll >= i.roll)
R.roll=0;

R.roll+=20;
SetBoneRotation('Rotor', R, 0, 1);
}

[legacy-Mr Evil]

That's the idea, but ticks don't occur at regular intervals so adding a constant amount will result in unstable rotational speed. You need to make use of the DeltaTime parameter (how many seconds since last tick), e.g.

var rotator R;

simulated function Tick(float DeltaTime)
{
	SpinRotor(DeltaTime);
}

simulated function SpinRotor(float DeltaTime)
{
	R.Roll += SpinSpeed * DeltaTime;
	SetBoneRotation('Bone_Barrel', R, 0, 1);
}

[musilowski]

Ohh, I wan't an apache!

BTW - Hows the WoE making going?

[legacy-Mr Evil]

Originally posted by Format Life:
...BTW - Hows the WoE making going?

It's going alright. I didn't manage to recruit quite as many team members as I would have liked, but it will still get done, just a little slower.

[legacy-Bigcheeese]

WOOT it works well sept i dont need roll but it still works

var rotator R;
var Rotator i;
var () int SpinSpeed;

function PostNetBeginPlay()
{
i.Roll=65535;
SpinSpeed=200;
R.Roll=0;

super.PostNetBeginPlay();
}

function Tick(float DeltaTime)
{
spinRotor(DeltaTime);
}

function spinRotor (float DeltaTime)
{
if (R.Roll >= i.Roll)
R.Roll = 0;

R.Roll += SpinSpeed * DeltaTime;
SetBoneRotation('Rotor', R, 0, 1);
}

thanks.

[legacy-Bigcheeese]

oh and BTW format life;

Wicked Pingune and I are making a military Mod so you can have a hole tone of em.