/****************************************************************************
* Play 3DCue:
* Plays a 3D cue based on an index and position
*****************************************************************************/
void SoundController::Play3DCue( XACTINDEX iCueIndex, D3DXVECTOR3* pvPosition )
{
if( bInitialized )
{
emitter.Position = *pvPosition;
// Play the cue as a 3D audio cue
pSoundBank->Prepare( iCueIndex, 0, 0, &pCue );
XACT3DCalculate( x3DInstance, &listener, &emitter, &dspSettings );
XACT3DApply( &dspSettings, pCue );
pCue->Play();
}
}
/****************************************************************************
* Do Work:
* Must be called about once per frame to proces sound
*****************************************************************************/
void SoundController::DoWork()
{
{
listener.OrientFront = D3DXVECTOR3( 0, 0, 1 );
listener.OrientTop = D3DXVECTOR3( 0, 1, 0 );
listener.Position = D3DXVECTOR3( 0, 5, 0 );
// Background music positioning
emitter.Position = D3DXVECTOR3( 0, 0, 0 );
XACT3DCalculate(x3DInstance, &listener, &emitter, &dspSettings);
XACT3DApply(&dspSettings, pBackgroundMusic);
}
pXACT3Engine->DoWork();
}
void CSoundComponent::Apply3D(vector<IXACT3Cue*>& cue, X3DAUDIO_LISTENER& mListener, vector<X3DAUDIO_EMITTER>& mEmitter)
{
// Set the listener information
ZeroMemory(&listener,sizeof(listener));
// set the XYZ of the camera
listener.Position = mListener.Position;
// set the direction the camera looks in
// this must be a unit vector
listener.OrientFront = mListener.OrientFront;
// set the up-direction of the camera
// again, this must be a unit vector and orthogonal to camLook
listener.OrientTop = mListener.OrientFront;
// assuming no doppler effect
listener.Velocity = D3DXVECTOR3(0,0,0);
// emitter ChannelCount and DSP Setting's SrcChannelCount must match
for(int i = 0; i<mEmitter.size(); i++)
{
mEmitter[i].ChannelCount = dspSettings.SrcChannelCount;
}
const float MIN_SOUND_DIST = 3.0f;
const float MAX_SOUND_DIST = 15.0f;
// the falloff curve:
// at range 0=>100%, MIN_SOUND_DIST=>100%, MAX_SOUND_DIST=>0%
X3DAUDIO_DISTANCE_CURVE_POINT soundFalloffPt[] = { 0.0f, 1.0f, MIN_SOUND_DIST, 1.0f, MAX_SOUND_DIST, 0.0f };
X3DAUDIO_DISTANCE_CURVE soundFalloff = { &soundFalloffPt[0], 3 };
for(int i = 0; i<mEmitter.size(); i++)
{
// set the falloff curve
mEmitter[i].pVolumeCurve =(X3DAUDIO_DISTANCE_CURVE*)&soundFalloff;
mEmitter[i].CurveDistanceScaler = 1.0; // this is a multiplier on all distances
// computer the effects on the sound and apply it
XACT3DCalculate(xact3dInstance, &listener, &mEmitter[i], &dspSettings );
if(i < cue.size())
XACT3DApply( &dspSettings, cue[i]);
else
FAILED("Cue not found");
}
}
