General Question Multiple thrusters

[gattispilot]

I am working on a vessel that has 1 Main thruster along the centerline. It has 2 "fake" thrusters for effects that rotate.

In the atmosphere I want to see the exhaust. But it no atmosphere I want no exhaust. So they get shut down.

The problem is that effects the thruster control. I understand why.

Is there a fix? When ion drive is on it just shows a mesh

thrusters and exhaust created

th_main[0] = CreateThruster (_V(0,0,0), _V(0,0,1), MAX_MAIN_THRUST, ph_main, ISP_GAL);
th_main[1]  = CreateThruster (_V(1.524,.5724375,.8676109), _V(0,0,1), SYSTEMS_THRUST, ph_main, 0);//fake thruster
th_main[2]  = CreateThruster (_V(-1.524,.5724375,.8676109), _V(0,0,1), SYSTEMS_THRUST, ph_main, 0);//fake thruster
        thg_main = CreateThrusterGroup (th_main, 3, THGROUP_MAIN);

    AddExhaust (th_main[1], 2, .3,.3);
    AddExhaust (th_main[2], 2, .3,.3);

in the poststep

ATMD1= GetAtmDensity () ;

//if ion drive on and in low atmosphere cut  fake engines off        
}
if ((ATMD1<.09)|| (iondrive==1)){SetAnimation (anim_EXHAUSTfins, thrusterlevel);
    SetThrusterLevel(th_main[1],0);
        SetThrusterLevel(th_main[2],0);
    SetAnimation (anim_EXHAUSTfins, 0);
}

 

[Hlynkacg]

Just give your non-functional thrusters a thrust of 0. and define their exhausts appropriately. Bot the DG and ShuttleA have exhausts that are only visible in atmosphere (contrails) adapt their specs to your purpose.

 

[Izack]

Put the fake thrusters into a separate group, and set that group's level to the main thruster group's level if inside atmosphere.

Thruster Definition:

th_main = CreateThruster (_V(0,0,0), _V(0,0,1), MAX_MAIN_THRUST, ph_main, ISP_GAL);

th_ion[0]  = CreateThruster (_V(1.524,.5724375,.8676109), _V(0,0,1), SYSTEMS_THRUST, ph_main, 0);//fake thruster
th_ion[1]  = CreateThruster (_V(-1.524,.5724375,.8676109), _V(0,0,1), SYSTEMS_THRUST, ph_main, 0);//fake thruster

thg_main = CreateThrusterGroup (th_main, 1, THGROUP_MAIN);

th_main no longer needs to be an array; instead have an array called th_ion.

In PostStep:

if (GetAtmDensity() < 0.09)
{
	for (int i = 0; i < 2; i++)
		SetThrusterLevel(th_ion[i], GetThrusterLevel(th_main));
	SetAnimation(anim_EXHAUSTfins, GetThrusterLevel(th_main));
}
else
{
	for (int i = 0; i < 2; i++)
		SetThrusterLevel(th_ion[i], 0);
	SetAnimation(anim_EXHAUSTfins, 0);
}

As Hlynkacg said, the 'SYSTEMS_THRUST' should be zero, or else very, very small.

 

[gattispilot]

Thanks. That did it.

th_main[1]  = CreateThruster (_V(1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster
th_main[2]  = CreateThruster (_V(-1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster

---------- Post added at 07:25 PM ---------- Previous post was at 11:37 AM ----------

Ok I followed this:

th_main = CreateThruster (_V(0,0,0), _V(0,0,1), MAX_MAIN_THRUST, ph_main, ISP_GAL);

th_ion[0]  = CreateThruster (_V(1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster
th_ion[1]  = CreateThruster (_V(-1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster

thg_main = CreateThrusterGroup (th_main, 1, THGROUP_MAIN);


	AddExhaust (th_ion[1], 2, .3,.3);
	AddExhaust (th_ion[2], 2, .3,.3 );

but get this error:

error C2664: 'VESSEL::CreateThrusterGroup' : cannot convert parameter 1 from 'THRUSTER_HANDLE' to 'THRUSTER_HANDLE *'
Conversion from 'void*' to pointer to non-'void' requires an explicit cast

 

[Izack]

Ah, my mistake. It should read:

thg_main = CreateThrusterGroup ([COLOR="Red"]&[/COLOR]th_main, 1, THGROUP_MAIN);

 

[gattispilot]

Thanks. But now I don't see any exhaust.

//THRUSTER_HANDLE th_att_rot[4], th_att_lin[4];		
th_main = CreateThruster (_V(0,0,0), _V(0,0,1), MAX_MAIN_THRUST, ph_main, ISP_GAL);

th_ion[0]  = CreateThruster (_V(1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster
th_ion[1]  = CreateThruster (_V(-1.524,.5724375,.8676109), _V(0,0,1), 0, ph_main, 0);//fake thruster

thg_main = CreateThrusterGroup (&th_main, 1, THGROUP_MAIN);

	AddExhaust (th_ion[0], 2, .3,.3);
	AddExhaust (th_ion[1], 2, .3,.3 );

I think the thrust level of the ion enignes isn't being increased with the main

 

[N_Molson]

Mmh did you try that ? Not 100% sure but worth a try :

if (GetAtmDensity() < 0.09)
{
	for (int i = 0; i < 2; i++)
		SetThrusterLevel(th_ion[i], GetThrusterLevel([B]&[/B]th_main));
	SetAnimation(anim_EXHAUSTfins, GetThrusterLevel([B]&[/B]th_main));
}
else
{
	for (int i = 0; i < 2; i++)
		SetThrusterLevel(th_ion[i], 0);
	SetAnimation(anim_EXHAUSTfins, 0);
}

 

[gattispilot]

Thanks
This works for now:
So if ion drive is off and Atmosphere density is greater than .1 then set the thruster level to the main thruster.

COLL=(GetThrusterLevel (th_main));


if ((ATMD1>.1)&& (iondrive==0)){
	SetThrusterLevel(th_ion[0],COLL);
	SetThrusterLevel(th_ion[1],COLL);
}