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 PhysFrictionSound( CBaseEntity *pEntity, IPhysicsObject *pObject, float energy, int surfaceProps, int surfacePropsHit )
{
if ( !pEntity || energy < 75.0f || surfaceProps < 0 )
return;
// don't make noise for hidden/invisible/sky materials
surfacedata_t *phit = physprops->GetSurfaceData( surfacePropsHit );
surfacedata_t *psurf = physprops->GetSurfaceData( surfaceProps );
if ( phit->game.material == 'X' || psurf->game.material == 'X' )
return;
// rescale the incoming energy
energy *= ENERGY_VOLUME_SCALE;
// volume of scrape is proportional to square of energy (steeper rolloff at low energies)
float volume = energy * energy;
unsigned short soundName = psurf->sounds.scrapeRough;
short *soundHandle = &psurf->soundhandles.scrapeRough;
if ( psurf->sounds.scrapeSmooth && phit->audio.roughnessFactor < psurf->audio.roughThreshold )
{
soundName = psurf->sounds.scrapeSmooth;
soundHandle = &psurf->soundhandles.scrapeRough;
}
const char *pSoundName = physprops->GetString( soundName );
PhysFrictionSound( pEntity, pObject, pSoundName, *soundHandle, volume );
}
