Problem with get_X()

[Siko]

Hi,
I'm making an application with optitrack, i Want to rgeister the coordinates of a point and write in a file.
Everything is ok, but I have a problem with the function get_X() of the class Object.
It's when I use it that the programs bugs.

here is my implementation...

Code: Select all

  #include "stdafx.h"
#include <iostream>
#include <fstream>
#include <windows.h>
#include <time.h>
#include <math.h>
#include <cstdlib>

//--open CV--
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>

//--optitrack--
#include <objbase.h>
#include <atlbase.h>
#include <optitrack.h>
#import  <optitrack.tlb>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
const int iterMax = 100;
//-> On ouvre le fichier
	fstream file("c:\\data\\NicolasJ\\text.txt",ios::out);
//-> Et on v�rifie qu'il est bien la, dans le cas contraire : erreur et fin du programme.
	if(!file){
		printf("Could not load image file: %s\n");
		exit(0);
	}
//__________________________________________________//
//													//
//		Proc�dure d'instanciation de la cam�ra		//
//		On instancie la cam�ra.						//
//__________________________________________________//
//
//-> On d�clare les variables (pointeurs)
	CComPtr<INPCameraCollection> cameraCollection;
	CComPtr<INPCamera>           camera;
	CoInitialize(NULL);
	cameraCollection.CoCreateInstance(CLSID_NPCameraCollection);

//-> On r�cup�re la liste des cam�ras avec la m�thode enum().
	cameraCollection->Enum();
//-> Si il n'y a pas de cam�ra
	long getCount=1;
	if(getCount==0){
		printf("Error : Pas de camera.");
		cameraCollection.Release();
		CoUninitialize();
		return 0;
	}
//-> Si on a une cam�ra, on la r�cup�re
	cameraCollection->Item(0, &camera);
//-> R�cup�ration des propri�t�s de la cam�ra
	long serial,width,height, rate;

	camera->get_SerialNumber(&serial);
	camera->get_Width       (&width);
	camera->get_Height      (&height);
	camera->get_FrameRate   (&rate);

//-> Fenetre (visualisation)
	cvNamedWindow("mainWin", CV_WINDOW_AUTOSIZE);  
	cvMoveWindow("mainWin", 100, 100);
	HWND hwnd1 = (HWND)cvGetWindowHandle("mainWin");
	long lg = (long)hwnd1;
//-> On d�marre la cam�ra
	if (camera->Open() == S_OK){
		camera->Start();
  		camera->SetOption(NP_OPTION_SEND_EMPTY_FRAMES, (CComVariant) true);
		camera->SetOption(NP_OPTION_TEXT_OVERLAY_OPTION,(CComVariant) 255);
		camera->SetOption(NP_OPTION_OBJECT_CAP,(CComVariant) 1); //(nmbre d'objet)
		camera->SetOption(NP_OPTION_EXPOSURE,(CComVariant) 50);//de 0 a 399 (luminosit�) par default 150
//-> On cr�e les variables pour r�cup�rer le point.
		CComPtr<INPCameraFrame>	  frame = 0;
		CComPtr<INPObject>	  point = 0;
		char c= '0';
		while(c != 'q')
		{
			if (camera->GetFrame(0, &frame) == S_OK){

				//Ne rentre que si il y'a une frame
				if(frame!=NULL){
					double *x,*y;
					CComVariant *X,*Y;
					
   					// New Frame Has Arrived
					camera->DrawFrame(frame, lg);
					long nObjet;
					frame->get_Count(&nObjet);
					if (nObjet > 0){
						//On rapatrie l'objet 1 de frame. (point pointe)
						if(frame->Item(0,&point) == S_OK){
							if(point->get_X(X) == S_OK)
								;//*x=(double)(X->dblVal);
							if(point->get_Y(Y)==S_OK)
								;//*y=(double)(Y->dblVal);
						//file.seekg(0);
						//file<<*x<<" "<<*y<<endl;
						point.Release();
						point=NULL;
						}
					}
				frame->Free();
				frame.Release();
				frame=NULL;
				}
			c = cvWaitKey(1);
			}	
		}
	}
	
	camera->Stop();
	camera->Close();
	camera.Release();
	camera = 0;
	cameraCollection.Release();
	CoUninitialize();
	file.close();
}

Thanks a lot,

Nico

[beckdo]

In your case X is an uninitialized pointer to an object that was never created.

try something more like this:

VARIANT X,Y;
point->get_X(&X);
point->get_Y(&Y);