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Revision <B>1.6</B>, <i>Wed Feb 20 18:07:22 2002 UTC</i> (5 months ago) by <i>lecroart</i>
<BR>Branch: <b>MAIN</b>
<BR>CVS Tags: <b>georges_v2, HEAD</b><BR>Changes since <b>1.5: +2 -2
lines</b><PRE>
#FIXED: doxygen warning
</PRE>
</td></tr></table><HR noshade><PRE>/** \file sound_sources/main.cpp
* Simple example of NeL sound engine usage
*
* $Id: main.cpp,v 1.6 2002/02/20 18:07:22 lecroart Exp $
*/
/* Copyright, 2001 Nevrax Ltd.
*
* This file is part of NEVRAX NEL.
* NEVRAX NEL 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, or (at your option)
* any later version.
* NEVRAX NEL 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 NEVRAX NEL; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
/*
* This sample shows how to initialize the audio mixer (UAudioMixer),
* how to create a source (USource), and how to move the listener
* (UListener).
*/
#include "nel/misc/debug.h"
#include "nel/misc/time_nl.h"
#include "nel/misc/vector.h"
using namespace NLMISC;
#include "nel/sound/u_audio_mixer.h"
#include "nel/sound/u_listener.h"
using namespace NLSOUND;
#include <stdio.h>
// Pointer to the audio mixer object
UAudioMixer *AudioMixer = NULL;
/*
* Initialization
*/
void Init()
{
try
{
/*
* 1. Create the audio mixer object and init it.
* If the sound driver cannot be loaded, an exception is thrown.
*/
AudioMixer = UAudioMixer::createAudioMixer();
AudioMixer->init();
/*
* 2. Load a "sources sounds file" (.nss), its sound properties and
* its attached wave data files (.wav)
*/
AudioMixer->loadSoundBuffers( "sample_sounds.nss" );
/*
* In this small example, we don't have any environmental effects or
* environment sounds. If so we would load an "environmental effects
* file" (.nef) and an "environment sounds file" (.nes):
*
* AudioMixer->loadEnvEffects( "effects.nef" );
*
* UEnvSound *root;
* AudioMixer->loadEnvSounds( "envsounds.nes", &root );
*/
/*
* 3. Initialize listener's position and orientation (in NeL coordinate system).
*/
CVector initpos ( 0.0f, 0.0f, 0.0f );
CVector frontvec( 0.0f, 1.0f, 0.0f );
CVector upvec( 0.0f, 0.0f, 1.0f );
AudioMixer->getListener()->setPos( initpos );
AudioMixer->getListener()->setOrientation( frontvec, upvec );
}
catch( Exception& e )
{
nlerror( "Error: %s", e.what() );
}
}
/*
* Adding a source
*/
USource *OnAddSource( const char *name, float x, float y, float z )
{
/*
* Create a source with sound 'name', and set some of its initial properties, if successful
*/
USource *source = AudioMixer->createSource( name );
if ( source != NULL )
{
source->setPos( CVector(x,y,z) );
/* The initial gain, pitch and looping state are stored
* in the "source sounds file".
*/
source->play(); // start playing immediately
}
else
{
nlwarning( "Sound '%s' not found", name );
}
return source;
}
/*
* When moving the listener, wait for a short delay
*/
void OnMove( const CVector& listenerpos )
{
// Move forward
AudioMixer->getListener()->setPos( listenerpos );
// Wait 20 ms
TTime time = CTime::getLocalTime();
while ( CTime::getLocalTime() < time+20 );
/* If we used spawned sources or "envsounds" or if we had
* a large number of sources, we should call:
* AudioMixer->update();
*/
}
/*
* main
*
* Note: The NeL vector coordinate system is described as follows:
* \verbatim
* (top)
* z
* | y (front)
* | /
* -----x (right)
* \endverbatim
*/
void main()
{
// Initialization
Init();
// First step: we create two sources
printf( "Press ENTER to start playing the two sources\n" );
printf( "One is 20 meters ahead, on the right\n" );
printf( "The other is 5 meters ahead, on the left\n" );
getchar();
USource *src1 = OnAddSource( "Beep", 1.0f, 20.0f, 0.0f ); // Beep on the right, 20 meters ahead
USource *src2 = OnAddSource( "Tuut", -2.0f, 5.0f, 0.0f ); // Tuut on the left, 5 meters ahead
// Second step: we will move the listener ahead
printf( "Press ENTER again to start moving the listener\n" );
getchar();
// Listener orientation is constant in this example (see initialization)
// Move forward, then backward, twice
CVector listenervel;
CVector listenerpos ( 0.0f, 0.0f, 0.0f );
for ( uint i=0; i!=2; i++ )
{
printf( "%u of 2\n", i+1 );
// Forward velocity
listenervel.set( 0.0f, 0.5f, 0.0f );
AudioMixer->getListener()->setVelocity( listenervel );
// Move forward: set position every frame
printf( "Moving forward, going past the sources...\n" );
for ( listenerpos.y=0.0f; listenerpos.y<30.0f; listenerpos.y+=0.1f )
{
OnMove( listenerpos );
}
// Backward velocity
listenervel.set( 0.0f, -0.5f, 0.0f );
AudioMixer->getListener()->setVelocity( listenervel );
// Move backward: set position every frame
printf( "Moving backward, going back to the start position...\n" );
for ( listenerpos.y=30.0f; listenerpos.y>0.0f; listenerpos.y-=0.1f )
{
OnMove( listenerpos );
}
}
// Finalization
printf( "Press ENTER again to exit\n" );
getchar();
delete AudioMixer;
}</PRE>
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