void CShadowController::AttachObject( void )
{
IVP_Real_Object *pivp = m_pObject->GetObject();
IVP_Core *pCore = pivp->get_core();
m_saveRot = pCore->rot_speed_damp_factor;
m_savedRI = *pCore->get_rot_inertia();
m_savedMass = pCore->get_mass();
m_savedMaterialIndex = m_pObject->GetMaterialIndexInternal();
m_pObject->SetMaterialIndex( MATERIAL_INDEX_SHADOW );
pCore->rot_speed_damp_factor = IVP_U_Float_Point( 100, 100, 100 );
if ( !m_allowPhysicsRotation )
{
IVP_U_Float_Point ri( 1e15f, 1e15f, 1e15f );
pCore->set_rotation_inertia( &ri );
}
if ( !m_allowPhysicsMovement )
{
m_pObject->SetMass( 1e6f );
//pCore->inv_rot_inertia.hesse_val = 0.0f;
m_pObject->EnableGravity( false );
}
pCore->calc_calc();
pivp->get_environment()->get_controller_manager()->add_controller_to_core( this, pCore );
m_shadow.lastPosition.set_to_zero();
}
//-----------------------------------------------------------------------------
// Purpose: This walks the objects in the environment and generates friction events
// for any scraping that is occurring.
//-----------------------------------------------------------------------------
void ProcessActiveObjects( IVP_Environment *pEnvironment, IPhysicsCollisionEvent *pEvent )
{
// FIXME: Is this correct? Shouldn't it do next PSI - lastScrape?
float nextTime = pEnvironment->get_old_time_of_last_PSI().get_time();
float delta = nextTime - m_lastScrapeTime;
// only process if we have done a PSI
if ( delta < pEnvironment->get_delta_PSI_time() )
return;
float t = 1.0f;
t /= delta;
if ( t > 10.0f )
t = 10.0f;
m_lastScrapeTime = nextTime;
// UNDONE: This only calls friciton for one object in each pair.
// UNDONE: Split energy in half and call for both objects?
// UNDONE: Don't split/call if one object is static (like the world)?
for ( int i = 0; i < m_activeObjects.Count(); i++ )
{
CPhysicsObject *pObject = m_activeObjects[i];
IVP_Real_Object *ivpObject = pObject->GetObject();
// no friction callbacks for this object
if ( ! (pObject->GetCallbackFlags() & CALLBACK_GLOBAL_FRICTION) )
continue;
// UNDONE: IVP_Synapse_Friction is supposed to be opaque. Is there a better way
// to implement this? Using the friction listener is much more work for the CPU
// and considers sleeping objects.
IVP_Synapse_Friction *pfriction = ivpObject->get_first_friction_synapse();
while ( pfriction )
{
IVP_Contact_Point *contact = pfriction->get_contact_point();
IVP_Synapse_Friction *pOpposite = GetOppositeSynapse( pfriction );
IVP_Real_Object *pobj = pOpposite->get_object();
CPhysicsObject *pScrape = (CPhysicsObject *)pobj->client_data;
// friction callbacks for this object?
if ( pScrape->GetCallbackFlags() & CALLBACK_GLOBAL_FRICTION )
{
float energy = IVP_Contact_Point_API::get_eliminated_energy( contact );
if ( energy )
{
IVP_Contact_Point_API::reset_eliminated_energy( contact );
// scrape with an estimate for the energy per unit mass
// This assumes that the game is interested in some measure of vibration
// for sound effects. This also assumes that more massive objects require
// more energy to vibrate.
energy = energy * t * ivpObject->get_core()->get_inv_mass();
if ( energy > 0.05f )
{
int hitSurface = physprops->RemapIVPMaterialIndex( pOpposite->get_material_index() );
CPhysicsFrictionData data(pfriction);
pEvent->Friction( pObject, ConvertEnergyToHL(energy), pObject->GetMaterialIndexInternal(), hitSurface, &data );
}
}
}
pfriction = pfriction->get_next();
}
}
}