C++ Question How to create verniers?

[NOMAD]

I want to create a rocket which has a main engine and four verniers.
But which thruster group type I should define for these verniers after I grouping the main engine in THGROUP_MAIN?
And how can I change the direction of the thrust by pressing the NUM key?
How to add the visual when the verniers changing its direction?

There is a tutorial on wiki about creating verniers,but I still puzzled.
I hope someone can help me.Thanks!

 

[tblaxland]

The section "Differential Thrust" contains the juicy bits. Can you be a little more specific about what you don't understand in that section?

 

[NOMAD]

The main problem is that which group type I should group for those verniers after I grouping the main engine in THGROUP_MAIN.Can I group these verniers in THGROUP_MAIN again? If not,how can I do ? Thanks.

 

[Urwumpe]

The main problem is that which group type I should group for those verniers after I grouping the main engine in THGROUP_MAIN.Can I group these verniers in THGROUP_MAIN again? If not,how can I do ? Thanks.

Yes, then the thruster level of the verniers is the same as the main engine thruster level. But for gimballing, you have to get the user inputs somehow.

 

[tblaxland]

Yes, then the thruster level of the verniers is the same as the main engine thruster level. But for gimballing, you have to get the user inputs somehow.

That is covered in the wiki tutorial:

double P,Y,R;
  P=GetThrusterGroupLevel(THGROUP_ATT_PITCHUP)-GetThrusterGroupLevel(THGROUP_ATT_PITCHDOWN);
  Y=GetThrusterGroupLevel(THGROUP_ATT_YAWRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_YAWLEFT);
  R=GetThrusterGroupLevel(THGROUP_ATT_BANKRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_BANKLEFT);
  sprintf(oapiDebugString(),"Pitch %f Yaw %f Roll %f",P,Y,R);
  SetThrusterDir(th_vernier[0],_V(0.087*R,0,1));
  SetThrusterDir(th_vernier[1],_V(0,0,1.0+0.05*(P-Y)));
  SetThrusterDir(th_vernier[2],_V(0,0,1.0+0.05*(P+Y)));

 

[Urwumpe]

That is covered in the wiki tutorial:

double P,Y,R;
  P=GetThrusterGroupLevel(THGROUP_ATT_PITCHUP)-GetThrusterGroupLevel(THGROUP_ATT_PITCHDOWN);
  Y=GetThrusterGroupLevel(THGROUP_ATT_YAWRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_YAWLEFT);
  R=GetThrusterGroupLevel(THGROUP_ATT_BANKRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_BANKLEFT);
  sprintf(oapiDebugString(),"Pitch %f Yaw %f Roll %f",P,Y,R);
  SetThrusterDir(th_vernier[0],_V(0.087*R,0,1));
  SetThrusterDir(th_vernier[1],_V(0,0,1.0+0.05*(P-Y)));
  SetThrusterDir(th_vernier[2],_V(0,0,1.0+0.05*(P+Y)));

But that required virtual thrusters for reacting properly, AFAIR.