/**
* \brief Get the epsilon to apply when the item is aligned.
*/
bear::universe::coordinate_type
bear::universe::physical_item::get_align_epsilon() const
{
if ( has_owner() )
return get_owner().get_position_epsilon();
else
return 0;
} // physical_item::get_align_epsilon()
/**
* \brief Test if the item is in a given environment.
* \param e The considered environment.
*/
bool bear::universe::physical_item::is_in_environment
(const universe::environment_type e) const
{
bool result = false;
if ( has_owner() )
{
std::set<universe::environment_type> environments;
get_owner().get_environments(get_bounding_box(), environments);
result = ( environments.find(e) != environments.end());
}
return result;
} // physical_item::is_in_environment()
/**
* \brief Test if the item is only in a given environment.
* \param e The considered environment.
*/
bool bear::universe::physical_item::is_only_in_environment
(const universe::environment_type e) const
{
bool result = false;
if ( has_owner() )
{
std::set<universe::environment_type> environments;
get_owner().get_environments(get_bounding_box(), environments);
if ( environments.size() == 1 )
result = ( *(environments.begin()) == e );
}
return result;
} // physical_item::is_only_in_environment()
/**
* \brief Calculate the new acceleration of the item.
*/
void bear::universe::physical_item::adjust_cinetic()
{
speed_type s( get_speed() );
if ( has_owner() )
{
const speed_type eps(get_owner().get_speed_epsilon());
if ( (s.x < eps.x) && (s.x > -eps.x) )
s.x = 0;
if ( (s.y < eps.y) && (s.y > -eps.y) )
s.y = 0;
set_speed(s);
if ( (get_angular_speed() < get_owner().get_angular_speed_epsilon()) &&
(get_angular_speed() > -get_owner().get_angular_speed_epsilon()) )
set_angular_speed(0);
}
} // physical_item::adjust_cinetic()
bool is_yokeable(const ObjectID& id, const ObjectManager *objectManager)
{
return !has_owner(id, objectManager) && objectManager->get_component<ICmpYoke>(id) != NULL;
}
bool is_renderable(const ObjectID& id, const ObjectManager *objectManager)
{
return !has_owner(id, objectManager) && objectManager->get_component<ICmpRender>(id) != NULL;
}
/**
* \brief Get the world that owns this item.
* \pre has_owner() == true
*/
bear::universe::world& bear::universe::physical_item::get_owner() const
{
CLAW_PRECOND( has_owner() );
return *m_owner;
} // physical_item::get_owner()
/**
* \brief Tell this item which world owns him.
* \param The world that owns this item.
*/
void bear::universe::physical_item::set_owner(world& owner)
{
CLAW_PRECOND( !has_owner() );
m_owner = &owner;
} // physical_item::set_owner()