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This is the source code for the module [[Surveyor]], by [[Kwan3217]]. It is based on the module for the [[Shuttle-PB]]. It is created in [[Vessel Tutorial 2]].
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<pre><nowiki>
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// ==============================================================
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// ==============================================================
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//                ORBITER MODULE: Surveyor
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//                ORBITER MODULE: Surveyor
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//                Copyright (C) 2005 Kwan3217
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//                Copyright (C) 2005 Kwan3217
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//      Released under the Gnu Free Documentation License
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//      Released under the Gnu Free Documentation License
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//
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//
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// Evolved from:
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// Evolved from:
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//                ORBITER MODULE: ShuttlePB
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//                  Part of the ORBITER SDK
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//                  Part of the ORBITER SDK
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//          Copyright (C) 2002-2004 Martin Schweiger
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//          Copyright (C) 2002-2004 Martin Schweiger
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//                  All rights reserved
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//                  All rights reserved
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//
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//
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// Surveyor.cpp
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// Surveyor.cpp
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// Control module for Surveyor vessel class
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// Control module for Surveyor vessel class
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//
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//
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// ==============================================================
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// ==============================================================
+
 
−
+
#define STRICT
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#define STRICT
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#define ORBITER_MODULE
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#define ORBITER_MODULE
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−
+
#include "orbitersdk.h"
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#include "orbitersdk.h"
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// ==============================================================
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// ==============================================================
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// Some vessel parameters
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// Some vessel parameters
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// ==============================================================
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// ==============================================================
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const double LANDER_EMPTY_MASS = 289.10; //Basic bus plus payload minus AMR minus retro case
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const double LANDER_EMPTY_MASS = 289.10; //Basic bus plus payload minus AMR minus retro case
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const double RETRO_EMPTY_MASS = 64.88;
−
const double RETRO_EMPTY_MASS = 64.88;
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const double AMR_MASS = 3.82;
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const double AMR_MASS = 3.82;
+
 
−
+
const double RETRO_PROP_MASS=560.64;
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const double RETRO_PROP_MASS=560.64;
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const double RETRO_THRUST = 39140;
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const double RETRO_THRUST = 39140;
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const double RETRO_BURNTIME = 40.5;
−
const double RETRO_BURNTIME = 40.5;
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const double RETRO_ITOT  = RETRO_THRUST*RETRO_BURNTIME;
−
const double RETRO_ITOT  = RETRO_THRUST*RETRO_BURNTIME;
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const double RETRO_ISP  = RETRO_ITOT/RETRO_PROP_MASS;
−
const double RETRO_ISP  = RETRO_ITOT/RETRO_PROP_MASS;
+
const double RETRO_STA  = -0.75;
−
const double RETRO_STA  = -0.75;
+
 
−
+
const double VERNIER_PROP_MASS = 70.98;
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const double VERNIER_PROP_MASS = 70.98;
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const double VERNIER_ISP = 3200;
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const double VERNIER_ISP = 3200;
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const double VERNIER_THRUST = 463;
−
const double VERNIER_THRUST = 463;
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const double VERNIER_RAD = 0.86;
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const double VERNIER_RAD = 0.86;
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const double VERNIER_STA = -0.5;
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const double VERNIER_STA = -0.5;
+
 
−
+
const double RCS_PROP_MASS=2;
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const double RCS_PROP_MASS=2;
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const double RCS_ISP = 630.0;
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const double RCS_ISP = 630.0;
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const double RCS_THRUST = 0.25;
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const double RCS_THRUST = 0.25;
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const double RCS_RAD = 1;
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const double RCS_RAD = 1;
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const double RCS_STA = -0.5;
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const double RCS_STA = -0.5;
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const double RCS_SPACE = 0.1;
−
const double RCS_SPACE = 0.1;
+
 
−
+
const double LEG_RAD = 1.5;
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const double LEG_RAD = 1.5;
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const double LEG_STA =-0.6;
−
const double LEG_STA =-0.6;
+
 
−
+
 
−
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// ==============================================================
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// ==============================================================
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// Shuttle-PB class interface
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// Shuttle-PB class interface
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// ==============================================================
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// ==============================================================
+
 
−
+
class Surveyor: public VESSEL2 {
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class Surveyor: public VESSEL2 {
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public:
−
public:
+
  Surveyor (OBJHANDLE hVessel, int flightmodel)
−
  Surveyor (OBJHANDLE hVessel, int flightmodel)
+
    : VESSEL2 (hVessel, flightmodel) {}
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    : VESSEL2 (hVessel, flightmodel) {}
+
  void clbkSetClassCaps (FILEHANDLE cfg);
−
  void clbkSetClassCaps (FILEHANDLE cfg);
+
  void clbkPreStep(double SimT, double SimDT, double MJD);
−
  void clbkPreStep(double SimT, double SimDT, double MJD);
+
  int  clbkConsumeBufferedKey(DWORD key, bool down, char *kstate);
−
  int  clbkConsumeBufferedKey(DWORD key, bool down, char *kstate);
+
  THRUSTER_HANDLE th_vernier[3], th_retro, th_rcs[6], th_group[2];
−
  THRUSTER_HANDLE th_vernier[3], th_retro, th_rcs[6], th_group[2];
+
  double CalcEmptyMass();
−
  double CalcEmptyMass();
+
  PROPELLANT_HANDLE ph_vernier, ph_rcs, ph_retro;
−
  PROPELLANT_HANDLE ph_vernier, ph_rcs, ph_retro;
+
  void SpawnObject(char* classname, char* ext, VECTOR3 ofs);
−
  void SpawnObject(char* classname, char* ext, VECTOR3 ofs);
+
  void Jettison();
−
  void Jettison();
+
  int status;
−
  int status;
+
 
−
+
  void SetupMeshes();
−
  void SetupMeshes();
+
  void AddLanderMesh();
−
  void AddLanderMesh();
+
  void AddRetroMesh();
−
  void AddRetroMesh();
+
  void AddAMRMesh();
−
  void AddAMRMesh();
+
};
−
};
+
 
−
+
double Surveyor::CalcEmptyMass() {
−
double Surveyor::CalcEmptyMass() {
 
 
   double EmptyMass=0;
 
   double EmptyMass=0;
−
  if(GetPropellantMass(ph_retro)>0.999*RETRO_PROP_MASS) {
+
  if(GetPropellantMass(ph_retro)>0.999*RETRO_PROP_MASS) {
−
    EmptyMass+=AMR_MASS;
+
    EmptyMass+=AMR_MASS;
−
  }
+
  }
−
  if(GetPropellantMass(ph_retro)>1) {
+
  if(GetPropellantMass(ph_retro)>1) {
−
    EmptyMass+=RETRO_EMPTY_MASS;
+
    EmptyMass+=RETRO_EMPTY_MASS;
−
  }
+
  }
−
  EmptyMass+=LANDER_EMPTY_MASS;
+
  EmptyMass+=LANDER_EMPTY_MASS;
−
  return EmptyMass;
+
  return EmptyMass;
−
}
+
}
−
+
 
−
// ==============================================================
+
// ==============================================================
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// Overloaded callback functions
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// Overloaded callback functions
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// ==============================================================
+
// ==============================================================
−
+
 
−
// --------------------------------------------------------------
+
// --------------------------------------------------------------
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// Set the capabilities of the vessel class
+
// Set the capabilities of the vessel class
−
// --------------------------------------------------------------
+
// --------------------------------------------------------------
−
void Surveyor::clbkSetClassCaps (FILEHANDLE cfg) {
+
void Surveyor::clbkSetClassCaps (FILEHANDLE cfg) {
−
+
 
−
  // physical specs
+
  // physical specs
−
  SetSize (1.0);
+
  SetSize (1.0);
−
  SetPMI (_V(0.5,0.5,0.5));
+
  SetPMI (_V(0.5,0.5,0.5));
−
  SetCameraOffset (_V(0,0.8,0));
+
  SetCameraOffset (_V(0,0.8,0));
−
  SetTouchdownPoints( _V( 0,LEG_RAD,LEG_STA), _V( sqrt(3.0)/2*LEG_RAD,-0.5*LEG_RAD,LEG_STA), _V(-sqrt(3.0)/2*LEG_RAD,-0.5*LEG_RAD,LEG_STA));
+
  SetTouchdownPoints( _V( 0,LEG_RAD,LEG_STA), _V( sqrt(3.0)/2*LEG_RAD,-0.5*LEG_RAD,LEG_STA), _V(-sqrt(3.0)/2*LEG_RAD,-0.5*LEG_RAD,LEG_STA));
−
+
 
−
  status=0;
+
  status=0;
−
+
 
−
  // propellant resources
+
  // propellant resources
−
  ph_vernier = CreatePropellantResource(VERNIER_PROP_MASS);
+
  ph_vernier = CreatePropellantResource(VERNIER_PROP_MASS);
−
  ph_rcs    = CreatePropellantResource(RCS_PROP_MASS);
+
  ph_rcs    = CreatePropellantResource(RCS_PROP_MASS);
−
  ph_retro  = CreatePropellantResource(RETRO_PROP_MASS);
+
  ph_retro  = CreatePropellantResource(RETRO_PROP_MASS);
−
+
 
−
  th_retro = CreateThruster(_V(0.0,0.0,RETRO_STA), _V(0,0,1), RETRO_THRUST, ph_retro, RETRO_ISP);
+
  th_retro = CreateThruster(_V(0.0,0.0,RETRO_STA), _V(0,0,1), RETRO_THRUST, ph_retro, RETRO_ISP);
−
  AddExhaust(th_retro, 2, 0.3);
+
  AddExhaust(th_retro, 2, 0.3);
−
+
 
−
  th_vernier[0] = CreateThruster(_V(        0.0*VERNIER_RAD, 1.0*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
+
  th_vernier[0] = CreateThruster(_V(        0.0*VERNIER_RAD, 1.0*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
−
  th_vernier[1] = CreateThruster(_V( sqrt(3.0)/2*VERNIER_RAD,-0.5*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
+
  th_vernier[1] = CreateThruster(_V( sqrt(3.0)/2*VERNIER_RAD,-0.5*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
−
  th_vernier[2] = CreateThruster(_V(-sqrt(3.0)/2*VERNIER_RAD,-0.5*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
+
  th_vernier[2] = CreateThruster(_V(-sqrt(3.0)/2*VERNIER_RAD,-0.5*VERNIER_RAD,VERNIER_STA), _V(0,0,1), VERNIER_THRUST, ph_vernier, VERNIER_ISP);
−
  CreateThrusterGroup(th_vernier, 3, THGROUP_MAIN);
+
  CreateThrusterGroup(th_vernier, 3, THGROUP_MAIN);
−
  for(int i=0;i<3;i++) {
+
  for(int i=0;i<3;i++) {
−
    AddExhaust(th_vernier[i], 1, 0.1);
+
    AddExhaust(th_vernier[i], 1, 0.1);
−
  }
+
  }
−
+
 
−
  //Roll (Leg1) jets
+
  //Roll (Leg1) jets
−
  th_rcs[ 0] = CreateThruster (_V(-RCS_SPACE,RCS_RAD,RCS_STA), _V( 1,0,0), RCS_THRUST, ph_rcs, RCS_ISP);
+
  th_rcs[ 0] = CreateThruster (_V(-RCS_SPACE,RCS_RAD,RCS_STA), _V( 1,0,0), RCS_THRUST, ph_rcs, RCS_ISP);
 
   th_rcs[ 1] = CreateThruster (_V( RCS_SPACE,RCS_RAD,RCS_STA), _V(-1,0,0), RCS_THRUST, ph_rcs, RCS_ISP);
 
   th_rcs[ 1] = CreateThruster (_V( RCS_SPACE,RCS_RAD,RCS_STA), _V(-1,0,0), RCS_THRUST, ph_rcs, RCS_ISP);
−
  //Leg2 jets
+
  //Leg2 jets
−
  th_rcs[ 2] = CreateThruster (_V( sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA-RCS_SPACE), _V(0, 0, 1), RCS_THRUST, ph_rcs, RCS_ISP);
+
  th_rcs[ 2] = CreateThruster (_V( sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA-RCS_SPACE), _V(0, 0, 1), RCS_THRUST, ph_rcs, RCS_ISP);
−
  th_rcs[ 3] = CreateThruster (_V( sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA+RCS_SPACE), _V(0, 0,-1), RCS_THRUST, ph_rcs, RCS_ISP);
+
  th_rcs[ 3] = CreateThruster (_V( sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA+RCS_SPACE), _V(0, 0,-1), RCS_THRUST, ph_rcs, RCS_ISP);
−
  //Leg3 jets
+
  //Leg3 jets
−
  th_rcs[ 4] = CreateThruster (_V(-sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA-RCS_SPACE), _V(0, 0, 1), RCS_THRUST, ph_rcs, RCS_ISP);
+
  th_rcs[ 4] = CreateThruster (_V(-sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA-RCS_SPACE), _V(0, 0, 1), RCS_THRUST, ph_rcs, RCS_ISP);
−
  th_rcs[ 5] = CreateThruster (_V(-sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA+RCS_SPACE), _V(0, 0,-1), RCS_THRUST, ph_rcs, RCS_ISP);
+
  th_rcs[ 5] = CreateThruster (_V(-sqrt(3.0)/2*RCS_RAD,-0.5*RCS_RAD,RCS_STA+RCS_SPACE), _V(0, 0,-1), RCS_THRUST, ph_rcs, RCS_ISP);
−
+
 
−
  th_group[0] = th_rcs[3];
+
  th_group[0] = th_rcs[3];
−
  th_group[1] = th_rcs[5];
+
  th_group[1] = th_rcs[5];
−
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_PITCHDOWN);
+
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_PITCHDOWN);
−
  th_group[0] = th_rcs[2];
+
  th_group[0] = th_rcs[2];
−
  th_group[1] = th_rcs[4];
+
  th_group[1] = th_rcs[4];
−
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_PITCHUP);
+
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_PITCHUP);
−
  th_group[0] = th_rcs[0];
+
  th_group[0] = th_rcs[0];
−
  CreateThrusterGroup (th_group, 1, THGROUP_ATT_BANKRIGHT);
+
  CreateThrusterGroup (th_group, 1, THGROUP_ATT_BANKRIGHT);
−
  th_group[0] = th_rcs[1];
+
  th_group[0] = th_rcs[1];
−
  CreateThrusterGroup (th_group, 1, THGROUP_ATT_BANKLEFT);
+
  CreateThrusterGroup (th_group, 1, THGROUP_ATT_BANKLEFT);
−
  th_group[0] = th_rcs[3];
+
  th_group[0] = th_rcs[3];
−
  th_group[1] = th_rcs[4];
+
  th_group[1] = th_rcs[4];
−
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_YAWRIGHT);
+
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_YAWRIGHT);
−
  th_group[0] = th_rcs[2];
+
  th_group[0] = th_rcs[2];
−
  th_group[1] = th_rcs[5];
+
  th_group[1] = th_rcs[5];
−
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_YAWLEFT);
+
  CreateThrusterGroup (th_group, 2, THGROUP_ATT_YAWLEFT);
−
+
 
−
  for (int i=0;i<6;i++) {
+
  for (int i=0;i<6;i++) {
−
    AddExhaust(th_rcs[i],0.1,0.05);
+
    AddExhaust(th_rcs[i],0.1,0.05);
−
  }
+
  }
−
+
 
−
  // visual specs
+
  // visual specs
−
  SetupMeshes();
+
  SetupMeshes();
−
}
+
}
−
+
 
−
void Surveyor::clbkPreStep(double SimT, double SimDT, double MJD) {
+
void Surveyor::clbkPreStep(double SimT, double SimDT, double MJD) {
−
  SetEmptyMass(CalcEmptyMass());
+
  SetEmptyMass(CalcEmptyMass());
−
  double P,Y,R;
+
  double P,Y,R;
−
  P=GetThrusterGroupLevel(THGROUP_ATT_PITCHUP)-GetThrusterGroupLevel(THGROUP_ATT_PITCHDOWN);
+
  P=GetThrusterGroupLevel(THGROUP_ATT_PITCHUP)-GetThrusterGroupLevel(THGROUP_ATT_PITCHDOWN);
−
  Y=GetThrusterGroupLevel(THGROUP_ATT_YAWRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_YAWLEFT);
+
  Y=GetThrusterGroupLevel(THGROUP_ATT_YAWRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_YAWLEFT);
−
  R=GetThrusterGroupLevel(THGROUP_ATT_BANKRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_BANKLEFT);
+
  R=GetThrusterGroupLevel(THGROUP_ATT_BANKRIGHT)-GetThrusterGroupLevel(THGROUP_ATT_BANKLEFT);
−
  sprintf(oapiDebugString(),"Pitch %f Yaw %f Roll %f",P,Y,R);
+
  sprintf(oapiDebugString(),"Pitch %f Yaw %f Roll %f",P,Y,R);
−
+
 
−
  SetThrusterDir(th_vernier[0],_V(0.087*R,0,1));
+
  SetThrusterDir(th_vernier[0],_V(0.087*R,0,1));
−
  SetThrusterDir(th_vernier[1],_V(0,0,1.0+0.05*P-0.05*Y));
+
  SetThrusterDir(th_vernier[1],_V(0,0,1.0+0.05*P-0.05*Y));
−
  SetThrusterDir(th_vernier[2],_V(0,0,1.0+0.05*P+0.05*Y));
+
  SetThrusterDir(th_vernier[2],_V(0,0,1.0+0.05*P+0.05*Y));
−
  if(status == 1 && GetPropellantMass(ph_retro)<1) {
+
  if(status == 1 && GetPropellantMass(ph_retro)<1) {
−
    //Jettison the spent main retro
+
    //Jettison the spent main retro
 +
    Jettison();
 +
  }
 +
  if(status == 0 && GetPropellantMass(ph_retro)<0.999*RETRO_PROP_MASS) {
 +
    //Jettison the AMR if the retro has started burning
 
     Jettison();
 
     Jettison();
−
  }
+
    //Relight the retro if needed
−
  if(status == 0 && GetPropellantMass(ph_retro)<0.999*RETRO_PROP_MASS) {
+
    SetThrusterLevel(th_retro,1);
−
    //Jettison the AMR if the retro has started burning
+
  }
−
    Jettison();
+
}
−
    //Relight the retro if needed
+
 
−
    SetThrusterLevel(th_retro,1);
+
void Surveyor::AddLanderMesh() {
−
  }
+
  VECTOR3 ofs = _V(0,0.3,0);
−
}
+
  AddMesh("Surveyor-Lander",&ofs);
−
+
}
−
void Surveyor::AddLanderMesh() {
+
void Surveyor::AddRetroMesh() {
−
  VECTOR3 ofs = _V(0,0.3,0);
+
  VECTOR3 ofs = _V(0,0,-0.5);
−
  AddMesh("Surveyor-Lander",&ofs);
+
  AddMesh("Surveyor-Retro",&ofs);
−
}
+
}
−
void Surveyor::AddRetroMesh() {
+
void Surveyor::AddAMRMesh() {
−
  VECTOR3 ofs = _V(0,0,-0.5);
+
  VECTOR3 ofs = _V(0,0,-0.8);
−
  AddMesh("Surveyor-Retro",&ofs);
+
  AddMesh("Surveyor-AMR",&ofs);
−
}
+
}
−
void Surveyor::AddAMRMesh() {
+
 
−
  VECTOR3 ofs = _V(0,0,-0.8);
+
void Surveyor::SetupMeshes() {
−
  AddMesh("Surveyor-AMR",&ofs);
+
  ClearMeshes();
−
}
 
−
 
−
void Surveyor::SetupMeshes() {
 
−
  ClearMeshes();
 
−
  switch(status) {
 
−
    case 0:
 
−
      AddAMRMesh();
 
−
    case 1:
 
−
      AddRetroMesh();
 
−
    case 2:
 
−
      AddLanderMesh();
 
−
  }
 
−
}
 
−
 
−
void Surveyor::SpawnObject(char* classname, char* ext, VECTOR3 ofs) {
 
−
  VESSELSTATUS vs;
 
−
  char name[256];
 
−
  GetStatus(vs);
 
−
  Local2Rel (ofs, vs.rpos);
 
−
  vs.eng_main = vs.eng_hovr = 0.0;
 
−
  vs.status = 0;
 
−
  strcpy (name, GetName()); strcat (name, ext);
 
−
  oapiCreateVessel (name, classname, vs);
 
−
}
 
−
 
−
void Surveyor::Jettison() {
 
 
   switch(status) {
 
   switch(status) {
−
    case 0:
+
    case 0:
−
      status=1;
+
      AddAMRMesh();
−
      SpawnObject("Surveyor_AMR","-AMR",_V(0,0,-0.8));
+
    case 1:
−
      break;
+
      AddRetroMesh();
−
    case 1:
+
    case 2:
−
      status=2;
+
      AddLanderMesh();
−
      SpawnObject("Surveyor_Retro","-Retro",_V(0,0,-0.5));
+
  }
−
      break;
+
}
−
  }
+
 
−
  SetupMeshes();
+
void Surveyor::SpawnObject(char* classname, char* ext, VECTOR3 ofs) {
−
}
+
  VESSELSTATUS vs;
−
+
  char name[256];
−
int Surveyor::clbkConsumeBufferedKey(DWORD key, bool down, char *kstate) {
+
  GetStatus(vs);
−
  if (!down) return 0; // only process keydown events
+
  Local2Rel (ofs, vs.rpos);
−
+
  vs.eng_main = vs.eng_hovr = 0.0;
−
  if (KEYMOD_SHIFT (kstate)) {
+
  vs.status = 0;
−
+
  strcpy (name, GetName()); strcat (name, ext);
−
  } else { // unmodified keys
+
  oapiCreateVessel (name, classname, vs);
−
    switch (key) {
+
}
−
      case OAPI_KEY_L:  // Fire Retro
+
 
−
        SetThrusterLevel(th_retro,1);
+
void Surveyor::Jettison() {
−
        return 1;
+
  switch(status) {
−
    }
+
    case 0:
−
  }
+
      status=1;
−
  return 0;
+
      SpawnObject("Surveyor_AMR","-AMR",_V(0,0,-0.8));
−
}
+
      break;
−
+
    case 1:
−
// ==============================================================
+
      status=2;
−
// API callback interface
+
      SpawnObject("Surveyor_Retro","-Retro",_V(0,0,-0.5));
−
// ==============================================================
+
      break;
−
+
  }
−
// --------------------------------------------------------------
+
  SetupMeshes();
−
// Vessel initialisation
+
}
−
// --------------------------------------------------------------
+
 
−
DLLCLBK VESSEL *ovcInit (OBJHANDLE hvessel, int flightmodel)
+
int Surveyor::clbkConsumeBufferedKey(DWORD key, bool down, char *kstate) {
−
{
+
  if (!down) return 0; // only process keydown events
−
  return new Surveyor (hvessel, flightmodel);
+
 
−
}
+
  if (KEYMOD_SHIFT (kstate)) {
−
+
 
−
// --------------------------------------------------------------
+
  } else { // unmodified keys
−
// Vessel cleanup
+
    switch (key) {
−
// --------------------------------------------------------------
+
      case OAPI_KEY_L:  // Fire Retro
−
DLLCLBK void ovcExit (VESSEL *vessel)
+
        SetThrusterLevel(th_retro,1);
−
{
+
        return 1;
−
  if (vessel) delete (Surveyor*)vessel;
+
    }
−
}
+
  }
 +
  return 0;
 +
}
 +
 
 +
// ==============================================================
 +
// API callback interface
 +
// ==============================================================
 +
 
 +
// --------------------------------------------------------------
 +
// Vessel initialisation
 +
// --------------------------------------------------------------
 +
DLLCLBK VESSEL *ovcInit (OBJHANDLE hvessel, int flightmodel)
 +
{
 +
  return new Surveyor (hvessel, flightmodel);
 +
}
  
−
[[Category: Articles]]
+
// --------------------------------------------------------------
−
[[Category:Libraries]]
+
// Vessel cleanup
 +
// --------------------------------------------------------------
 +
DLLCLBK void ovcExit (VESSEL *vessel)
 +
{
 +
  if (vessel) delete (Surveyor*)vessel;
 +
}
 +
</nowiki></pre>

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