source: flair-src/trunk/tools/VrpnLite/src/VrpnLite.cpp@ 331

//  created:    2019/03/12
//  filename:   VrpnLite.cpp
//
//  author:     Guillaume Sanahuja
//              Copyright Heudiasyc UMR UTC/CNRS 7253
//
//  version:    $Id: $
//
//  purpose:    vrpnlite, to forward it to bth for exemple
//              usefull to reduce vrpn frame size
//
/*********************************************************************/

#include "VrpnLite.h"
#include <VrpnClient.h>
#include <VrpnObject.h>
#include <Thread.h>
#include <UdpSocket.h>
#include <FrameworkManager.h>
#include <Quaternion.h>
#include <string.h>

using namespace std;
using namespace flair::core;
using namespace flair::sensor;

VrpnLite::VrpnLite(int vrpnLitePort,string vrpnServerAddress): Thread(getFrameworkManager(),"VrpnLite",90) {
  vrpnclient=new VrpnClient("vrpn", vrpnServerAddress,80); 
  dataSocket = new UdpSocket(this,"client socket",vrpnLitePort);
  vrpnclient->Start();
}

VrpnLite::~VrpnLite() {
}

void VrpnLite::Run(void) {
  Time dataSocketTimeout;
  char msg[256];
  
  while (!ToBeStopped()) {
    
    if(vrpnobjects.size()>0) {
      //wait for last one to be sure all are up to date
      if(WaitUpdate(vrpnobjects.at(vrpnobjects.size()-1),100000000)) {
          SendObjects();
      }
      dataSocketTimeout=TIME_NONBLOCK;
    } else {
      dataSocketTimeout=100000000;
    }
    
    ssize_t rcv=dataSocket->RecvMessage(msg,sizeof(msg),dataSocketTimeout);
    if(rcv>0) {
      string object=msg;
      uint16_t id;
      memcpy(&id,&msg[rcv-2],sizeof(id));
      dataSocket->HostToNetwork((char*)&id,sizeof(id));
      //assume we receive it in the good order
      if(id==vrpnobjects.size()) {
        Printf("adding object %s with id %i\n",object.c_str(),id);
        VrpnObject* vrpnobject = new VrpnObject(object,vrpnclient->GetTabWidget());
        vrpnobjects.push_back(vrpnobject);
      }else {
        Err("adding object %s failed, expected id %i, got %i\n",object.c_str(),vrpnobjects.size(),id);
      }
    }
  }
}

void VrpnLite::SendObjects(void) const{
  int16_t position[3];
  int16_t quaternion[4];
  Time time;
  char datas[vrpnobjects.size()*(sizeof(position)+sizeof(quaternion))+ sizeof(time)];
  char *datasPtr=datas;
  
  for (vector<VrpnObject*>::const_iterator it = vrpnobjects.begin();it < vrpnobjects.end(); it++) {
    Vector3Df objectPosition;
    Quaternion objectQuaternion;
    const VrpnObject* vrpnobject=*it;

    vrpnobject->GetPosition(objectPosition);
    vrpnobject->GetQuaternion(objectQuaternion);
    time=vrpnobject->GetLastPacketTime();

    position[0]=ConvertPosition(objectPosition.x);
    position[1]=ConvertPosition(objectPosition.y);
    position[2]=ConvertPosition(objectPosition.z);
    quaternion[0]=ConvertQuaternion(objectQuaternion.q0);
    quaternion[1]=ConvertQuaternion(objectQuaternion.q1);
    quaternion[2]=ConvertQuaternion(objectQuaternion.q2);
    quaternion[3]=ConvertQuaternion(objectQuaternion.q3);

    for(int i=0;i<3;i++) dataSocket->HostToNetwork((char*)(&position[i]),sizeof(position[i]));
    for(int i=0;i<4;i++) dataSocket->HostToNetwork((char*)(&quaternion[i]),sizeof(quaternion[i]));

    memcpy(datasPtr,position, sizeof(position));
    datasPtr+=sizeof(position);
    memcpy(datasPtr,quaternion, sizeof(quaternion));
    datasPtr+=sizeof(quaternion);
  }
  
  dataSocket->HostToNetwork((char*)(&time),sizeof(Time));
  memcpy(datasPtr,&time, sizeof(time));//only one time for all VrpnObject; suppose it is the same!
  dataSocket->SendMessage(datas,sizeof(datas));
}

int16_t VrpnLite::ConvertQuaternion(float value) const{
  int16_t tmp;
  tmp=value*32767.;
  if(value<-1) {
    tmp=-32767;
    Warn("position value is %f, saturating it to %i\n",value,tmp);
  }
  if(value>1) {
    tmp=32767;
    Warn("position value is %f, saturating it to %i\n",value,tmp);
  }
  return tmp;
}

int16_t VrpnLite::ConvertPosition(float value) const{
  int16_t tmp;
  tmp=value*1000;
  if(value<-32.768) {
    tmp=-32768;
    Warn("position value is %f, saturating it to %i\n",value,tmp);
  }
  if(value>32.767) {
    tmp=32767;
    Warn("position value is %f, saturating it to %i\n",value,tmp);
  }
  return tmp;
}