//------ Begin of function Nation::ai_sea_attack_target ------//
//
// <int> targetXLoc, targetYLoc - the location of the target.
//
int Nation::ai_sea_attack_target(int targetXLoc, int targetYLoc)
{
UnitMarine* unitMarine;
int targetRegionId = world.get_region_id(targetXLoc, targetYLoc);
int rc = 0;
for( int i=0 ; i<ai_ship_count ; i++ )
{
unitMarine = (UnitMarine*) unit_array[ ai_ship_array[i] ];
if( unitMarine->attack_count==0 )
continue;
if( !unitMarine->is_ai_all_stop() )
continue;
//----- if the ship is in the harbor now -----//
if( unitMarine->unit_mode == UNIT_MODE_IN_HARBOR )
{
FirmHarbor* firmHarbor = (FirmHarbor*) firm_array[unitMarine->unit_mode_para];
if( firmHarbor->sea_region_id != targetRegionId )
continue;
firmHarbor->sail_ship(unitMarine->sprite_recno, COMMAND_AI);
}
if( !unitMarine->is_visible() ) // no space in the sea for placing the ship
continue;
if( unitMarine->region_id() != targetRegionId )
continue;
//------ order the ship to attack the target ------//
unitMarine->attack_unit( targetXLoc, targetYLoc );
rc = 1;
}
return rc;
}
//-------- Begin of function Nation::ai_find_transport_ship -------//
//
// Locate a ship for transporting units.
//
// <int> seaRegionId - region id. of the sea which the ship should appear in.
// <int> unitXLoc, unitYLoc - the location of the units to be picked up,
// try to select a harbor close to this location.
// [int] findBest - whether need to find the best ship or just return
// one if there is one found. (default: 1)
//
// return: <int> the recno of the ship located.
//
int Nation::ai_find_transport_ship(int seaRegionId, int unitXLoc, int unitYLoc, int findBest)
{
//------- locate a suitable ship --------//
UnitMarine* unitMarine;
int curRating, bestRating=0, bestUnitRecno=0;
for( int i=0 ; i<ai_ship_count ; i++ )
{
unitMarine = (UnitMarine*) unit_array[ ai_ship_array[i] ];
err_when( unit_res[unitMarine->unit_id]->unit_class != UNIT_CLASS_SHIP );
if( unitMarine->unit_count > 0 || // if there are already units in the ship
unit_res[unitMarine->unit_id]->carry_unit_capacity==0 ) // if the ship does not carry units
{
continue;
}
//------- if this ship is in the harbor ---------//
if( unitMarine->unit_mode == UNIT_MODE_IN_HARBOR )
{
FirmHarbor* firmHarbor = (FirmHarbor*) firm_array[unitMarine->unit_mode_para];
err_when( firmHarbor->firm_id != FIRM_HARBOR );
if( firmHarbor->sea_region_id != seaRegionId )
continue;
}
//--------- if this ship is on the sea ----------//
else
{
if( !unitMarine->is_ai_all_stop() )
continue;
if( unitMarine->region_id() != seaRegionId )
continue;
err_when( !unitMarine->is_visible() );
if( !unitMarine->is_visible() )
continue;
}
//--------- check if the sea region is matched ---------//
if( !findBest ) // return immediately when a suitable one is found
return unitMarine->sprite_recno;
curRating = world.distance_rating( unitXLoc, unitYLoc,
unitMarine->next_x_loc(), unitMarine->next_y_loc() );
curRating += (int)unitMarine->hit_points/10 // damage
+ (int)unitMarine->max_hit_points/10; // ship class
if( curRating > bestRating )
{
bestRating = curRating;
bestUnitRecno = unitMarine->sprite_recno;
}
}
return bestUnitRecno;
}
