PPT UDP data format

[MiamiTodd]

Do you have any recommendations on reading to get this done? I'm trying to read through the VRPN documentation but am very unfamiliar with C++.

Am I approaching things correctly if I wanted to get the data sent from the PPT into another program that I would have to code up a plugin for python in C++ and then use that in the desired python modules? There is no way to get this data straight off the socket short of performing these reads through the VRPN 6.0.6 in another program or using the Vizard program?

Thanks,
Todd

[farshizzo]

Hi,

Have you downloaded the VRPN source code? It contains a few examples of connecting to a device and retrieving data from it. Here is a rough outline of what the code should look like:

void handle_pos(void *userdata, const vrpn_TRACKERCB t)
{
	printf("Marker %d: %.2lf, %.2lf, %.2lf\n",t.sensor,t.pos[0],t.pos[1],t.pos[2]);
}

//Create tracker object
vrpn_Tracker_Remote *tracker = new vrpn_Tracker_Remote("PPT0@YourMachineName");

//Setup callback for when new position data comes in
tracker->register_change_handler(NULL, handle_pos);

//Need to call this every frame to receive data
tracker->mainloop();

//Cleanup tracker when exiting
delete tracker;

The only way to get data from the PPT is either through VRPN or from the serial port using our own API. Our API is on our PPT download page.