void CCollisionEvent::Friction( IPhysicsObject *pObject, float energy, int surfaceProps, int surfacePropsHit, IPhysicsCollisionData *pData )
{
CallbackContext callback(this);
if ( energy < 0.05f || surfaceProps < 0 )
return;
//Get our friction information
Vector vecPos, vecVel;
pData->GetContactPoint( vecPos );
pObject->GetVelocityAtPoint( vecPos, &vecVel );
CBaseEntity *pEntity = reinterpret_cast<CBaseEntity *>(pObject->GetGameData());
if ( pEntity )
{
friction_t *pFriction = g_Collisions.FindFriction( pEntity );
if ( (gpGlobals->maxClients > 1) && pFriction && pFriction->pObject)
{
// in MP mode play sound and effects once every 500 msecs,
// no ongoing updates, takes too much bandwidth
if ( (pFriction->flLastEffectTime + 0.5f) > gpGlobals->curtime)
{
pFriction->flLastUpdateTime = gpGlobals->curtime;
return;
}
}
PhysFrictionSound( pEntity, pObject, energy, surfaceProps, surfacePropsHit );
}
PhysFrictionEffect( vecPos, vecVel, energy, surfaceProps, surfacePropsHit );
}
void PhysCleanupFrictionSounds( CBaseEntity *pEntity )
{
friction_t *pFriction = g_Collisions.FindFriction( pEntity );
if ( pFriction && pFriction->patch )
{
g_Collisions.ShutdownFriction( *pFriction );
}
}
void PhysFrictionSound( CBaseEntity *pEntity, IPhysicsObject *pObject, const char *pSoundName, HSOUNDSCRIPTHANDLE& handle, float flVolume )
{
if ( !pEntity )
return;
// cut out the quiet sounds
// UNDONE: Separate threshold for starting a sound vs. continuing?
flVolume = clamp( flVolume, 0.0f, 1.0f );
if ( flVolume > (1.0f/128.0f) )
{
friction_t *pFriction = g_Collisions.FindFriction( pEntity );
if ( !pFriction )
return;
CSoundParameters params;
if ( !CBaseEntity::GetParametersForSound( pSoundName, handle, params, NULL ) )
return;
if ( !pFriction->pObject )
{
// don't create really quiet scrapes
if ( params.volume * flVolume <= 0.1f )
return;
pFriction->pObject = pEntity;
CPASAttenuationFilter filter( pEntity, params.soundlevel );
int entindex = pEntity->entindex();
// clientside created entites doesn't have a valid entindex, let 'world' play the sound for them
if ( entindex < 0 )
entindex = 0;
pFriction->patch = CSoundEnvelopeController::GetController().SoundCreate(
filter, entindex, CHAN_BODY, pSoundName, params.soundlevel );
CSoundEnvelopeController::GetController().Play( pFriction->patch, params.volume * flVolume, params.pitch );
}
else
{
float pitch = (flVolume * (params.pitchhigh - params.pitchlow)) + params.pitchlow;
CSoundEnvelopeController::GetController().SoundChangeVolume( pFriction->patch, params.volume * flVolume, 0.1f );
CSoundEnvelopeController::GetController().SoundChangePitch( pFriction->patch, pitch, 0.1f );
}
pFriction->flLastUpdateTime = gpGlobals->curtime;
pFriction->flLastEffectTime = gpGlobals->curtime;
}
}
