Trying to make a jetpack...

[hd!]

I'm messing around in the Source SDK and wanted to add a jetpack for fun. It took me a while to grasp the vector usage but I finally have something that resembles a jetpack. Source code:

bool CGameMovement::CheckJetButton( void )
{
	//* if not set to null, player can't leave ground without jumping
	SetGroundEntity((CBaseEntity *)NULL);

	float upwardThrust = 11.0f;
	float fMove = mv->m_flForwardMove;
	float sMove = mv->m_flSideMove;
	float uMove = mv->m_flUpMove;

	if (fMove != 0 || sMove != 0)
		upwardThrust = 10.0f;

	fMove *= 2.5f;
	sMove *= 2.5f;
	uMove *= 2.5f;

	Vector x, y, z, first, second;
	AngleVectors(mv->m_vecViewAngles, &x, &y, &z);

	VectorNormalize(x);
	VectorNormalize(y);
	VectorNormalize(z);

	first[0] = x[0] * fMove + y[0] * sMove + z[0] * uMove;
	first[1] = x[1] * fMove + y[1] * sMove + z[1] * uMove;
	first[2] = x[2] * fMove + y[2] * sMove + z[2] * uMove;

	VectorCopy(first, second);
	VectorNormalize(second);

	mv->m_vecVelocity[0] += second[0];
	mv->m_vecVelocity[1] += second[1];
	mv->m_vecVelocity[2] += second[2] + upwardThrust;

	if (mv->m_vecVelocity[0] > 0 && mv->m_vecVelocity[0] > 1500)
		mv->m_vecVelocity[0] = 1500;
	else if (mv->m_vecVelocity[0] < 0 && mv->m_vecVelocity[0] < -1500)
		mv->m_vecVelocity[0] = -1500;

	if (mv->m_vecVelocity[1] > 0 && mv->m_vecVelocity[1] > 1500)
		mv->m_vecVelocity[1] = 1500;
	else if (mv->m_vecVelocity[1] < 0 && mv->m_vecVelocity[1] < -1500)
		mv->m_vecVelocity[1] = -1500;

	return true;
}

Now, I've added a new keybind and in WalkMove where it checks to see if a player has jumped, I added a new check to see if a person presses the new keybind and if so, this is called and they try to jet.

My first question is, is there a better way to implement this? I eventually plan on tying it to a power source such as the suit armor or aux power.

My second question is, how can I make it more responsive? I want to have to over come any momentum gained when trying to change directions but as it stands now, it takes quite a while and effort to start going in the opposite direction you're already moving. Just trying to adjust your course with the moveleft/moveright can be pretty unresponsive when trying to make quick adjustments.

Thanks in advance.

[hd!]

Okay, I found out that the VectorNormalize was numbing the responsiveness of the input. So, I removed that and lowered the value of fMove, sMove and uMove dramatically and it's a lot closer to what I want.

So, I guess my next question is, how do I play a sound while jetpacking and loop it and then cancel it, even in mid play when the jetpack button is released?

[DementNeo]

[QUOTE=hd!;18061844]
My second question is, how can I make it more responsive? I want to have to over come any momentum gained when trying to change directions but as it stands now, it takes quite a while and effort to start going in the opposite direction you're already moving. Just trying to adjust your course with the moveleft/moveright can be pretty unresponsive when trying to make quick adjustments.
[/QUOTE]

Can't you just set their velocity when they try and change direction, then begin building velocity again?

edit: Didn't read the new post! Sorry.