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Masterarbeit/openvibe/extras-master/applications/examples/openvibe-to-vrpn/src/vrpn-receiver.cpp

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+/*
+ * Receives data from OpenViBE's VRPN boxes
+ *
+ * See here: http://openvibe.inria.fr/vrpn-tutorial-sending-data-from-openvibe-to-an-external-application/
+ *
+ */
+
+#include <iostream>
+
+#include <vrpn_Button.h>
+#include <vrpn_Analog.h>
+
+void VRPN_CALLBACK VrpnButtonCallback(void* userData, vrpn_BUTTONCB button)
+{
+	std::cout << "Button ID : " << button.button << " / Button State : " << button.state << std::endl;
+
+	if (button.button == 1)
+	{
+		std::cout << "Quit requested by button press" << std::endl;
+		*static_cast<bool*>(userData) = false;
+	}
+}
+
+void VRPN_CALLBACK VrpnAnalogCallback(void* /*user_data*/, vrpn_ANALOGCB analog)
+{
+	for (int i = 0; i < analog.num_channel; ++i) { std::cout << "Analog Channel : " << i << " / Analog Value : " << analog.channel[i] << std::endl; }
+}
+
+int main(const int argc, char** argv)
+{
+	if (argc != 1 && argc != 3)
+	{
+		std::cout << "Usage:\n\n" << argv[0] << " [buttonDevice] [analogDevice]\n";
+		return 1;
+	}
+
+	const char* buttonDevice = "openvibe_vrpn_button@localhost";
+	const char* analogDevice = "openvibe_vrpn_analog@localhost";
+
+	if (argc == 3)
+	{
+		buttonDevice = argv[1];
+		analogDevice = argv[2];
+	}
+
+	std::cout << "Polling these VRPN devices\n  Button: " << buttonDevice << "\n  Analog: " << analogDevice << "\n";
+
+	/* flag used to stop the program execution */
+	bool running = true;
+
+	/* Binding of the VRPN Button to a callback */
+	vrpn_Button_Remote* vrpnButton = new vrpn_Button_Remote(buttonDevice);
+	vrpnButton->register_change_handler(&running, VrpnButtonCallback);
+
+	/* Binding of the VRPN Analog to a callback */
+	vrpn_Analog_Remote* vrpnAnalog = new vrpn_Analog_Remote(analogDevice);
+	vrpnAnalog->register_change_handler(nullptr, VrpnAnalogCallback);
+
+	/* The main loop of the program, each VRPN object must be called in order to process data */
+	while (running) { vrpnButton->mainloop(); }
+
+	vrpnAnalog->unregister_change_handler(nullptr, VrpnAnalogCallback);
+	vrpnButton->unregister_change_handler(&running, VrpnButtonCallback);
+
+	delete vrpnButton;
+	delete vrpnAnalog;
+
+	return 0;
+}