PointDrawerTUIO.cpp

/*
 Point Viewer with TUIO output
 
 Copyright (c) 2011 ZD Studios Inc.
 
 Author: Matt Cook <matt@lookitscook.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "PointDrawerTUIO.h"

// Constructor. Receives the number of previous positions to store per hand,
// and a source for depth map
PointDrawerTUIO::PointDrawerTUIO(XnUInt32 nHistory, xn::DepthGenerator depthGenerator, const char *host, int port) : 
	XnVPointDrawer(nHistory, depthGenerator)
{
	width = 640;
	height = 480;
	cursor = NULL;
	if ((strcmp(host,"default")==0) && (port==0)) tuioServer = new TuioServer();
	else tuioServer = new TuioServer(host, port);
	currentTime = TuioTime::getSessionTime();
	
}

// Destructor. Clear all data structures
PointDrawerTUIO::~PointDrawerTUIO()
{
	delete tuioServer;
}

// Handle a new Message
void PointDrawerTUIO::Update(XnVMessage* pMessage)
{
	currentTime = TuioTime::getSessionTime();
	tuioServer->initFrame(currentTime);
	XnVPointDrawer::Update(pMessage);
	//tuioServer->stopUntouchedMovingCursors();
	tuioServer->commitFrame();
}

// Handle detection of new hand, currently only supports single hand
void PointDrawerTUIO::OnPointCreate(const XnVHandPointContext* cxt)
{
	if(cursor==NULL){
		XnPoint3D pt(cxt->ptPosition);
		m_DepthGenerator.ConvertRealWorldToProjective(1, &pt, &pt);
		float x = pt.X/width; 
		float y = pt.Y/height;
		cursor = tuioServer->addTuioCursor(x,y);
	}
	XnVPointDrawer::OnPointCreate(cxt);
}

// Handle new position of an existing hand
void PointDrawerTUIO::OnPointUpdate(const XnVHandPointContext* cxt)
{
	if (cursor!=NULL && cursor->getTuioTime()!=currentTime){
		XnPoint3D pt(cxt->ptPosition);
		m_DepthGenerator.ConvertRealWorldToProjective(1, &pt, &pt);
		float x = pt.X/width; 
		float y = pt.Y/height;
		tuioServer->updateTuioCursor(cursor,x,y);
	}
	XnVPointDrawer::OnPointUpdate(cxt);
}

// Handle destruction of an existing hand
void PointDrawerTUIO::OnPointDestroy(XnUInt32 nID)
{
	if (cursor!=NULL){
		tuioServer->removeTuioCursor(cursor);
		cursor = NULL;
	}
	XnVPointDrawer::OnPointDestroy(nID);
}