/**
* \brief Align \a that on the bridge.
* \param that The other item of the collision.
* \param info Some informations about the collision.
*/
bool bear::bridge::align_on_bridge
( engine::base_item& that, universe::collision_info& info )
{
bool result = false;
universe::position_type previous_pos;
universe::position_type next_pos;
compute_neighboor
(info.other_previous_state().get_bottom_middle(),previous_pos,next_pos);
if ( check_item
( info.other_previous_state().get_bottom_middle(),
previous_pos, next_pos, 0 ) )
{
compute_neighboor(that.get_bottom_middle(),previous_pos,next_pos);
if ( ! check_item( that.get_bottom_middle(), previous_pos, next_pos,
s_line_width ) )
{
universe::position_type pos =
compute_align_position(that,previous_pos, next_pos);
apply_angle_to(that,info);
return collision_align_top(info, pos);
}
}
return result;
} // bridge::align_on_bridge()
/**
* \brief Align the other item of the collision.
* \param info Some informations about the collision.
* \param policy The description of how to align the items.
*/
bool bear::universe::physical_item::default_collision
( const collision_info& info, const collision_align_policy& policy )
{
bool result(false);
position_type p( info.get_bottom_left_on_contact() );
switch( info.get_collision_side() )
{
case zone::bottom_zone:
p.y -= get_align_epsilon();
result = collision_align_bottom(info, p, policy);
break;
case zone::top_zone:
p.y += get_align_epsilon();
result = collision_align_top(info, p, policy);
break;
case zone::middle_left_zone:
p.x -= get_align_epsilon();
result = collision_align_left(info, p, policy);
break;
case zone::middle_right_zone:
p.x += get_align_epsilon();
result = collision_align_right(info, p, policy);
break;
case zone::middle_zone:
result = collision_middle(info, policy);
break;
default: { CLAW_ASSERT( false, "Invalid collision side." ); }
}
return result;
} // physical_item::default_collision()
/**
* \brief Align the other item of the collision on the top of \a this.
* \param info Some informations about the collision.
* \param policy The description of how to align the items.
*/
bool bear::universe::physical_item::collision_align_top
( const collision_info& info, const collision_align_policy& policy )
{
position_type pos;
if ( info.get_collision_side() == zone::top_zone )
pos = info.get_bottom_left_on_contact();
else
pos.set( info.other_item().get_left(), get_top() );
pos.y += get_align_epsilon();
return collision_align_top( info, pos, policy );
} // physical_item::collision_align_top()
/**
* \brief Align the other item of the collision on the top of \a this.
* \param info Some informations about the collision.
* \param pos The bottom left position to put the other item at.
*/
bool bear::universe::physical_item::collision_align_top
( const collision_info& info, const position_type& pos )
{
return collision_align_top( info, pos, collision_align_policy() );
} // physical_item::collision_align_top()