C++ SimpleXMLTransfer::getString方法代码示例

void Robots::AddRobot(std::string robotfilename)
{
  Robot* robot = new Robot();

  // 
  robot->fi = new ModRobotInterface();
  robot->fi->loadAirplane(robotfilename.c_str(), (FDMEnviroment*)0, (SimpleXMLTransfer*)0);  
  if (robot->fi->robot)
  {    
    SimpleXMLTransfer* header = robot->fi->robot->GetHeader();
    
    std::string filename = FileSysTools::getDataPath(header->getString("airplane.file"));
    
    SimpleXMLTransfer* xml = new SimpleXMLTransfer(filename);
    XMLModelFile::SetGraphics(xml, header->getInt("airplane.graphics"));
    SimpleXMLTransfer* graphics = XMLModelFile::getGraphics(xml);
    
    // 
    robot->vis_id = Video::new_visualization("objects/" + graphics->attribute("model"),
                                             "textures",
                                             CRRCMath::Vector3(), // todo
                                             xml);
  
    list.push_back(robot);
  }
}

/**
 *  Create a CRRCControlSurfaceAnimation object
 *
 *  Initialize the animation from an 
 *  <animation type="ControlSurface"> tag
 */
CRRCControlSurfaceAnimation::CRRCControlSurfaceAnimation(SimpleXMLTransfer *xml)
 : CRRCAnimation(new ssgTransform()), fallback_data(0.0f),
   eventAdapter(this, &CRRCControlSurfaceAnimation::axisValueCallback, Event::Input),
    aileron(0.0f), elevator(0.0f), rudder(0.0f), throttle(0.0f),
    spoiler(0.0f), flap(0.0f), retract(0.0f), pitch(0.0f)
{
  bool failed = false;
  
  // evaluate <object> tag
  SimpleXMLTransfer *map = xml->getChild("object", true);
  symbolic_name = map->getString("name", "no_name_set");
  max_angle = (float)(map->getDouble("max_angle", 0.0) * SG_RADIANS_TO_DEGREES);
  abs_max_angle = (float)fabs((double)max_angle);

  // find hinges and evaluate all <control> tags
  int num_controls = 0;
  int num_hinges = 0;
  for (int i = 0; i < xml->getChildCount(); i++)
  {
    SimpleXMLTransfer *child = xml->getChildAt(i);
    if (child->getName() == "hinge")
    {
      // found a <hinge> child
      sgVec3 pos;
      pos[SG_X] = (float)(-1 * child->getDouble("y", 0.0));
      pos[SG_Y] = (float)(-1 * child->getDouble("x", 0.0));
      pos[SG_Z] = (float)(-1 * child->getDouble("z", 0.0));
      if (num_hinges == 0)
      {
        sgCopyVec3(hinge_1, pos);
      }
      else if (num_hinges == 1)
      {
        sgCopyVec3(hinge_2, pos);
      }
      num_hinges++;
    }
    else if (child->getName() == "control")
    {
      // found a <control> child
      // The "*2" factor for each gain value scales the control input
      // values from -0.5...+0.5 to -1.0...+1.0. This saves one
      // float multiplication per mapping in the runtime update() routine.
      std::string mapping = child->getString("mapping", "NOTHING");
      float gain = (float)child->getDouble("gain", 1.0);
      if (mapping == "ELEVATOR")
      {
        datasource.push_back(&elevator);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "AILERON")
      {
        datasource.push_back(&aileron);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "THROTTLE")
      {
        datasource.push_back(&throttle);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "RUDDER")
      {
        datasource.push_back(&rudder);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "FLAP")
      {
        datasource.push_back(&flap);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "SPOILER")
      {
        datasource.push_back(&spoiler);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "RETRACT")
      {
        datasource.push_back(&retract);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "PITCH")
      {
        datasource.push_back(&pitch);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else
//.........这里部分代码省略.........

/**
 * Create a HardPointRotation
 *
 * \param xml <animation> part of the model file that contains the
 *            description of the animation
 */
HardPointRotation::HardPointRotation(SimpleXMLTransfer *xml, TSimInputs const& in)
{
  bool failed = false;
  
  // evaluate <object> tag
  SimpleXMLTransfer *map = xml->getChild("object", true);
  symbolic_name = map->getString("name", "no_name_set");
  max_angle_rad = (float)map->getDouble("max_angle", 0.0);
  abs_max_angle_rad = (float)fabs((double)max_angle_rad);

  // find hinges and evaluate all <control> tags
  int num_controls = 0;
  int num_hinges = 0;
  for (int i = 0; i < xml->getChildCount(); i++)
  {
    SimpleXMLTransfer *child = xml->getChildAt(i);
    if (child->getName() == "hinge")
    {
      // found a <hinge> child
      CRRCMath::Vector3 pos;
      pos.r[0] = (float)(child->getDouble("x", 0.0));
      pos.r[1] = (float)(child->getDouble("y", 0.0));
      pos.r[2] = (float)(child->getDouble("z", 0.0));
      if (num_hinges < 2)
      {
        hinge[num_hinges] = pos;
      }
      num_hinges++;
    }
    else if (child->getName() == "control")
    {
      // found a <control> child
      // The "*2" factor for each gain value scales the control input
      // values from -0.5...+0.5 to -1.0...+1.0. This saves one
      // float multiplication per mapping in the runtime update() routine.
      // NB: unsigned control (throttle, spoiler, retract) are not scaled,
      //     since control input is already in range 0.0...+1.0
      std::string mapping = child->getString("mapping", "NOTHING");
      float gain = (float)child->getDouble("gain", 1.0);
      std::cout << "  mapped to " << mapping << " with gain " << gain;
      std::cout << " and max_angle_rad " << max_angle_rad << std::endl;
      if (mapping == "ELEVATOR")
      {
        datasource.push_back(&in.elevator);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "AILERON")
      {
        datasource.push_back(&in.aileron);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "THROTTLE")
      {
        datasource.push_back(&in.throttle);
        source_gain.push_back(gain);
        num_controls++;
      }
      else if (mapping == "RUDDER")
      {
        datasource.push_back(&in.rudder);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "FLAP")
      {
        datasource.push_back(&in.flap);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else if (mapping == "SPOILER")
      {
        datasource.push_back(&in.spoiler);
        source_gain.push_back(gain);
        num_controls++;
      }
      else if (mapping == "RETRACT")
      {
        datasource.push_back(&in.retract);
        source_gain.push_back(gain);
        num_controls++;
      }
      else if (mapping == "PITCH")
      {
        datasource.push_back(&in.pitch);
        source_gain.push_back(gain * 2);
        num_controls++;
      }
      else
      {
        fprintf(stderr, "HardPointRotation: ignoring <control> tag without mapping.\n");
      }
      
//.........这里部分代码省略.........

/**
 * Initialize a WheelSystem from an XML file.
 *
 * \param ModelFile   pointer to file class
 * \param def_span    default span if no hardpoints are found to calculate it
 */
void WheelSystem::init(SimpleXMLTransfer *ModelFile, SCALAR  def_span)
{
  Wheel              wheel(this);
  SimpleXMLTransfer  *e, *i;
  unsigned int       uSize;
  double             x, y, z;
  double             dist;
  double             to_ft;
  double             to_lbf_per_ft;
  double             to_lbf_s_per_ft;
  double             to_lbf;
  CRRCMath::Vector3  pCG;
   
  /**
   * Tracks wingspan [m]
   */
  double span = 0;
  span_ft = 0.0;
  
  
  //
  pCG = CRRCMath::Vector3(0, 0, 0);
  if (ModelFile->indexOfChild("CG") >= 0)
  {
    i = ModelFile->getChild("CG");
    pCG.r[0] = i->attributeAsDouble("x", 0);
    pCG.r[1] = i->attributeAsDouble("y", 0);
    pCG.r[2] = i->attributeAsDouble("z", 0);
    
    if (i->attributeAsInt("units") == 1)
      pCG *= M_TO_FT;
  }
  
  // let's assume that there is nothing below/above the CG:
  dZLow    = 0;
  dZHigh   = 0;
  
  // let's assume that there is nothing distant from the CG:
  dMaxSize = 0;
  
  wheels.clear();
  
  i = ModelFile->getChild("wheels");
  switch (i->getInt("units"))
  {
   case 0:    
    to_ft           = 1;
    to_lbf_per_ft   = 1;
    to_lbf_s_per_ft = 1;
    to_lbf          = 1;
    break;
   case 1:
    to_ft           = M_TO_FT;
    to_lbf_per_ft   = FT_TO_M / LBF_TO_N;
    to_lbf_s_per_ft = FT_TO_M / LBF_TO_N;
    to_lbf          = N_TO_LBF;
    break;
   default:
    {
      throw std::runtime_error("Unknown units in wheels");
    }
    break;
  }        
  uSize = i->getChildCount();
  for (unsigned int n=0; n<uSize; n++)
  {
    // we assign the child number as a unique ID for
    // debugging
    wheel.nID = n;
    
    e = i->getChildAt(n);
    
    x = e->getDouble("pos.x") * to_ft - pCG.r[0];
    y = e->getDouble("pos.y") * to_ft - pCG.r[1];
    z = e->getDouble("pos.z") * to_ft - pCG.r[2];
    wheel.v_P = CRRCMath::Vector3(x, y, z);
    
    // let's see if this wheel is coupled to an animation
    wheel.anim_name = e->getString("pos.animation", "");
    if (wheel.anim_name != "")
    {
      std::cout << "WheelSystem::init: hardpoint is coupled to anim ";
      std::cout << wheel.anim_name << std::endl;
    }
    wheel.hpt = NULL;
    if (ModelFile->indexOfChild("animations") >= 0)
    {
      SimpleXMLTransfer *a = ModelFile->getChild("animations");
      unsigned int numAnims = a->getChildCount();
      for (unsigned int animIndex = 0; animIndex < numAnims; animIndex++)
      {
        SimpleXMLTransfer *an = a->getChildAt(animIndex);
        if (an->getString("object.name", "") == wheel.anim_name)
        {
//.........这里部分代码省略.........

/** \brief Add animations to a model
 *
 *  This method reads animation description tags from a model file
 *  and tries to add the corresponding animations to the 3D model.
 *
 *  \todo Right now there's only one type of animation: movable control
 *  surfaces. Therefore this method receives a pointer to the control
 *  input class. If animations are added that need a different kind of
 *  input for their update() method, we need to decide how to pass all
 *  this stuff to initAnimations().
 *
 *  \param  model_file    XML model description file
 *  \param  model         scenegraph of the 3D model
 *  \param  fInputs       pointer to the control input class
 *  \param  anim_list     list of all created CRRCAnimation objects
 */
void initAnimations(SimpleXMLTransfer *model_file, ssgEntity* model, 
                    TSimInputs *fInput, std::vector<CRRCAnimation*>& anim_list)
{
  SimpleXMLTransfer *animations = model_file->getChild("animations", true);
  int num_anims = animations->getChildCount();
  fprintf(stdout, "initAnimations: found %d children\n", num_anims);
  
  for (int i = 0; i < num_anims; i++)
  {
    SimpleXMLTransfer *animation = animations->getChildAt(i);
    ssgEntity *node;
    
    if (animation->getName() != "animation")
    {
      fprintf(stderr, "initAnimations: invalid child <%s>\n", animation->getName().c_str());
    }
    else
    {
      std::string node_name = animation->getString("object.name", "default");
      std::string type      = animation->getString("type", "default");

      node = SSGUtil::findNamedNode(model, node_name.c_str());
      if (node != NULL)
      {
        CRRCAnimation *anim = NULL;
        printf("initAnimations: found animation node %s, type %s\n", 
                node_name.c_str(), type.c_str());
        
        if (type == "ControlSurface")
        {
          anim = new CRRCControlSurfaceAnimation(animation, fInput);
        }
        else
        {
          fprintf(stderr, "initAnimations: unknown animation type '%s'\n", type.c_str());
        }
        
        if (anim != NULL)
        {
          if (anim->getBranch() == NULL)
          {
            fprintf(stderr, "initAnimations: defunct animation class (animation branch is <NULL>)\n");
            exit(0);
          }
          else
          {
            SSGUtil::spliceBranch(anim->getBranch(), node);
            anim->init();
            anim->setName("Animation");
            anim->getBranch()->setUserData(anim);
            anim->getBranch()->setTravCallback(SSG_CALLBACK_PRETRAV, animation_callback);
            anim_list.push_back(anim);
          }
        }
        
      }
      else
      {
        fprintf(stderr, "initAnimations: node '%s' not found in 3D model\n", node_name.c_str());
      }
    }
  }
}