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AIRCRAFT.CPP
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/*
** Command & Conquer(tm)
** Copyright 2025 Electronic Arts Inc.
**
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* $Header: F:\projects\c&c\vcs\code\aircraft.cpv 2.12 19 Jun 1995 09:27:22 JOE_BOSTIC $ */
/***********************************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Command & Conquer *
* *
* File Name : AIRCRAFT.CPP *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : July 22, 1994 *
* *
* Last Update : August 13, 1995 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* AircraftClass::AI -- Processes the normal non-graphic AI for the aircraft. *
* AircraftClass::Active_Click_With -- Handles clicking over specified cell. *
* AircraftClass::Active_Click_With -- Handles clicking over specified object. *
* AircraftClass::AircraftClass -- The constructor for aircraft objects. *
* AircraftClass::As_Target -- Returns aircraft as a target number. *
* AircraftClass::Can_Enter_Cell -- Determines if the aircraft can land at this location. *
* AircraftClass::Cell_Seems_Ok -- Checks to see if a cell is good to enter. *
* AircraftClass::Desired_Load_Dir -- Determines where passengers should line up. *
* AircraftClass::Draw_It -- Renders an aircraft object at the location specified. *
* AircraftClass::Enter_Idle_Mode -- Gives the aircraft an appropriate mission. *
* AircraftClass::Exit_Object -- Unloads passenger from aircraft. *
* AircraftClass::Fire_At -- Handles firing a projectile from an aircraft. *
* AircraftClass::Fire_Coord -- Calculates the point of origin for a bullet. *
* AircraftClass::Fire_Direction -- Determines the direction of fire. *
* AircraftClass::Good_Fire_Location -- Searches for and finds a good spot to fire from. *
* AircraftClass::Good_LZ -- Locates a good spot ot land. *
* AircraftClass::In_Which_Layer -- Determine which render layer the aircraft lies. *
* AircraftClass::Init -- Initialize the aircraft system to an empty state. *
* AircraftClass::Is_LZ_Clear -- Determines if landing zone is free for landing. *
* AircraftClass::Mark -- Flags cells under the aircraft so that they will be redrawn. *
* AircraftClass::Mission_Attack -- Handles the attack mission for aircraft. *
* AircraftClass::Mission_Enter -- Control aircraft to fly to the helipad or repair center. *
* AircraftClass::Mission_Guard -- Handles aircraft in guard mode. *
* AircraftClass::Mission_Guard_Area -- Handles the aircraft guard area logic. *
* AircraftClass::Mission_Hunt -- Maintains hunt AI for the aircraft. *
* AircraftClass::Mission_Move -- Handles movement mission. *
* AircraftClass::Mission_Retreat -- Handles the aircraft logic for leaving the battlefield. *
* AircraftClass::Mission_Unload -- Handles unloading cargo. *
* AircraftClass::New_LZ -- Find a good landing zone. *
* AircraftClass::Overlap_List -- Returns with list of cells the aircraft overlaps. *
* AircraftClass::Pip_Count -- Returns the number of "objects" in aircraft. *
* AircraftClass::Player_Assign_Mission -- Handles player input to assign a mission. *
* AircraftClass::Pose_Dir -- Fetches the natural landing facing. *
* AircraftClass::Process_Fly_To -- Handles state machine for flying to destination. *
* AircraftClass::Process_Landing -- Landing process state machine handler. *
* AircraftClass::Process_Take_Off -- State machine support for taking off. *
* AircraftClass::Read_INI -- Reads aircraft object data from an INI file. *
* AircraftClass::Rearm_Delay -- Returns the delay between shots for this aircraft. *
* AircraftClass::Receive_Message -- Handles receipt of radio messages. *
* AircraftClass::Response_Attack -- Gives audio response to attack order. *
* AircraftClass::Response_Move -- Gives audio response to move request. *
* AircraftClass::Response_Select -- Gives audio response when selected. *
* AircraftClass::Scatter -- Causes the aircraft to move away a bit. *
* AircraftClass::Set_Speed -- Sets the speed for the aircraft. *
* AircraftClass::Sort_Y -- Figures the sorting coordinate. *
* AircraftClass::Take_Damage -- Applies damage to the aircraft. *
* AircraftClass::Threat_Range -- Returns with a range to scan for targets. *
* AircraftClass::Unlimbo -- Removes an aircraft from the limbo state. *
* AircraftClass::What_Action -- Determines what action to perform. *
* AircraftClass::What_Action -- Determines what action to perform. *
* AircraftClass::Write_INI -- Writes the current aircraft objects to an INI file. *
* AircraftClass::operator delete -- Deletes the aircraft object. *
* AircraftClass::operator new -- Allocates a new aircraft object from the pool *
* AircraftClass::~AircraftClass -- Destructor for aircraft object. *
* AircraftClass::Validate -- validates aircraft pointer *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "function.h"
/*
** This contains the value of the Virtual Function Table Pointer
*/
void * AircraftClass::VTable;
/***********************************************************************************************
* AircraftClass::Validate -- validates aircraft pointer *
* *
* INPUT: *
* none. *
* *
* OUTPUT: *
* 1 = ok, 0 = error *
* *
* WARNINGS: *
* none. *
* *
* HISTORY: *
* 08/09/1995 BRR : Created. *
*=============================================================================================*/
#ifdef CHEAT_KEYS
int AircraftClass::Validate(void) const
{
int num;
num = Aircraft.ID(this);
if (num < 0 || num >= AIRCRAFT_MAX) {
Validate_Error("AIRCRAFT");
return (0);
}
else
return (1);
}
#else
#define Validate()
#endif
/***********************************************************************************************
* AircraftClass::As_Target -- Returns aircraft as a target number. *
* *
* This routine will convert the aircraft into a target number. This target number can *
* then be assigned to a targeting or navigation computer. *
* *
* INPUT: none *
* *
* OUTPUT: Returns the aircraft as a target number. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 09/24/1994 JLB : Created. *
*=============================================================================================*/
TARGET AircraftClass::As_Target(void) const
{
Validate();
return(Build_Target(KIND_AIRCRAFT, Aircraft.ID(this)));
}
/***********************************************************************************************
* AircraftClass::operator new -- Allocates a new aircraft object from the pool *
* *
* This routine will allocate an aircraft object from the free aircraft object pool. If *
* there are no free object available, then this routine will fail (return NULL). *
* *
* INPUT: none *
* *
* OUTPUT: Returns with a pointer to the allocate aircraft object or NULL if none were *
* available. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void * AircraftClass::operator new(size_t)
{
void * ptr = Aircraft.Allocate();
if (ptr) {
((AircraftClass *)ptr)->IsActive = true;
}
return(ptr);
}
/***********************************************************************************************
* AircraftClass::operator delete -- Deletes the aircraft object. *
* *
* This routine will return the aircraft object back to the free aircraft object pool. *
* *
* INPUT: ptr -- Pointer to the aircraft object to delete. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::operator delete(void *ptr)
{
if (ptr) {
((AircraftClass *)ptr)->IsActive = false;
}
Aircraft.Free((AircraftClass *)ptr);
}
/***********************************************************************************************
* AircraftClass::AircraftClass -- The constructor for aircraft objects. *
* *
* This routine is the constructor for aircraft objects. An aircraft object can be *
* created and possibly placed into the game system by this routine. *
* *
* INPUT: classid -- The type of aircraft to create. *
* *
* house -- The owner of this aircraft. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
AircraftClass::AircraftClass(AircraftType classid, HousesType house) :
Class(&AircraftTypeClass::As_Reference(classid)),
FootClass(house)
{
/*
** For two shooters, clear out the second shot flag -- it will be set the first time
** the object fires. For non two shooters, set the flag since it will never be cleared
** and the second shot flag tells the system that normal rearm times apply -- this is
** what is desired for non two shooters.
*/
if (Class->IsTwoShooter) {
IsSecondShot = false;
} else {
IsSecondShot = true;
}
Ammo = Class->MaxAmmo;
AttacksRemaining = 3;
Altitude = FLIGHT_LEVEL;
IsLanding = false;
IsTakingOff = false;
IsHovering = false;
IsHoming = false;
Strength = Class->MaxStrength;
NavCom = TARGET_NONE;
SecondaryFacing = PrimaryFacing;
Jitter = 0;
/*
** Keep count of the number of units created. Dont track cargo planes as they are created
** automatically, not bought.
*/
if (classid != AIRCRAFT_CARGO && GameToPlay == GAME_INTERNET){
House->AircraftTotals->Increment_Unit_Total((int)classid);
}
}
/***********************************************************************************************
* AircraftClass::Unlimbo -- Removes an aircraft from the limbo state. *
* *
* This routine is used to transition the aircraft from the limbo to the non limbo state. *
* It occurs when the aircraft is placed on the map for whatever reason. When it is *
* unlimboed, only then will normal game processing recognize it. *
* *
* INPUT: coord -- The coordinate that the aircraft should appear at. *
* *
* dir -- The direction it should start facing. *
* *
* strength (optional) -- sets initial strength *
* *
* mission (optional) -- sets initial mission *
* *
* OUTPUT: bool; Was the aircraft unlimboed successfully? *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
bool AircraftClass::Unlimbo(COORDINATE coord, DirType dir)
{
Validate();
if (FootClass::Unlimbo(coord, dir)) {
/*
** Ensure that the owning house knows about the
** new object.
*/
House->AScan |= (1L << Class->Type);
House->ActiveAScan |= (1L << Class->Type);
/*
** Forces the body of the helicopter to face the correct direction.
*/
SecondaryFacing = dir;
/*
** Start rotor animation.
*/
Set_Rate(1);
Set_Stage(0);
/*
** Presume it starts in flight?
*/
if (Altitude == FLIGHT_LEVEL) {
Set_Speed(0xFF);
} else {
Set_Speed(0);
}
return(true);
}
return(false);
}
/***********************************************************************************************
* AircraftClass::Draw_It -- Renders an aircraft object at the location specified. *
* *
* This routine is used to display the aircraft object at the coordinates specified. *
* The tactical map display uses this routine for all aircraft rendering. *
* *
* INPUT: x,y -- The coordinates to render the aircraft at. *
* *
* window -- The window that the coordinates are based upon. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::Draw_It(int x, int y, WindowNumberType window)
{
Validate();
void const * shapefile; // Working shape file pointer.
int shapenum = 0;
int facing = Facing_To_32(SecondaryFacing);
/*
** Verify the legality of the unit class.
*/
shapefile = Class->Get_Image_Data();
if (!shapefile) return;
shapenum = UnitClass::BodyShape[facing];
/*
** The orca attack helicopter uses a special shape set when it is travelling
** forward above a certain speed.
*/
if (*this == AIRCRAFT_ORCA && Get_Speed() >= MPH_MEDIUM_FAST) {
shapenum += 32;
}
/*
** If there is a door on this aircraft (Chinook), then adjust the
** shape number to match the door open state.
*/
if (!Is_Door_Closed()) {
shapenum = 32 + Door_Stage();
}
/*
** Helicopters that are flying have a "bobbing" effect.
*/
int jitter = 0;
if (Altitude == FLIGHT_LEVEL && !Class->IsFixedWing) {
Jitter++;
static int _jitter[] = {0,0,0,0,1,1,1,0,0,0,0,0,-1,-1,-1,0};
jitter = _jitter[Jitter % 16];
}
/*
** Special manual shadow draw code.
*/
if (Visual_Character() <= VISUAL_DARKEN) {
CC_Draw_Shape(shapefile, shapenum, x+1, y+2, window, SHAPE_PREDATOR|SHAPE_CENTER|SHAPE_WIN_REL|SHAPE_FADING, Map.FadingShade, NULL);
}
/*
** Actually draw the root body of the unit.
*/
Techno_Draw_Object(shapefile, shapenum, x, (y-Altitude)+jitter, window);
// CC_Draw_Shape(shapefile, shapenum, x, (y-Altitude)+jitter, window, SHAPE_FADING|SHAPE_CENTER|SHAPE_WIN_REL|SHAPE_GHOST, House->Remap_Table(IsBlushing, true), Map.UnitShadow);
/*
** Draw rotor effects. The rotor art can be either generic or custom. Custom rotor
** art has a different rotor set for each facing. Rotor shapes occur after the first
** 32 shapes of the helicopter body.
*/
if (Class->IsRotorEquipped) {
ShapeFlags_Type flags = SHAPE_CENTER|SHAPE_WIN_REL;
/*
** The rotor shape number depends on whether the helicopter is idling
** or not. A landed helicopter uses slow moving "idling" blades.
*/
if (Altitude == 0) {
shapenum = (Fetch_Stage()%8)+4;
flags = flags | SHAPE_GHOST;
} else {
shapenum = Fetch_Stage()%4;
flags = flags | SHAPE_FADING|SHAPE_PREDATOR;
}
if (*this == AIRCRAFT_TRANSPORT) {
int _stretch[FACING_COUNT] = {8, 9, 10, 9, 8, 9, 10, 9};
/*
** Dual rotors offset along flight axis.
*/
short xx = x;
short yy = y-Altitude;
FacingType face = Dir_Facing(SecondaryFacing);
Move_Point(xx, yy, SecondaryFacing.Current(), _stretch[face]);
CC_Draw_Shape(Class->RRotorData, shapenum, xx, yy-2, window, flags, NULL, Map.UnitShadow);
Move_Point(xx, yy, SecondaryFacing.Current()+DIR_S, _stretch[face]*2);
CC_Draw_Shape(Class->LRotorData, shapenum, xx, yy-2, window, flags, NULL, Map.UnitShadow);
} else {
/*
** Single rotor centered about shape.
*/
CC_Draw_Shape(Class->RRotorData, shapenum, x, (y-Altitude)-2, window, flags, NULL, Map.UnitShadow);
}
}
FootClass::Draw_It(x, y-Altitude, window);
}
/***********************************************************************************************
* AircraftClass::Read_INI -- Reads aircraft object data from an INI file. *
* *
* This routine is used to read the aircraft object data from the INI file buffer *
* specified. This is used by the scenario loader code to interpret the INI file and *
* create the specified objects therein. *
* *
* INPUT: buffer -- Pointer to the INI buffer. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::Read_INI(char *buffer)
{
AircraftClass *air; // Working unit pointer.
char *tbuffer; // Accumulation buffer of unit IDs.
HousesType inhouse; // Unit house.
AircraftType classid; // Unit class.
int len; // Length of data in buffer.
char buf[128];
len = strlen(buffer) + 2;
tbuffer = buffer + len;
WWGetPrivateProfileString(INI_Name(), NULL, NULL, tbuffer, ShapeBufferSize-len, buffer);
while (*tbuffer != '\0') {
WWGetPrivateProfileString(INI_Name(), tbuffer, NULL, buf, sizeof(buf)-1, buffer);
inhouse = HouseTypeClass::From_Name(strtok(buf, ","));
if (inhouse != HOUSE_NONE) {
classid = AircraftTypeClass::From_Name(strtok(NULL, ","));
if (classid != AIRCRAFT_NONE) {
air = new AircraftClass(classid, inhouse);
if (air) {
COORDINATE coord;
int strength;
DirType dir;
/*
** Read the raw data.
*/
strength = atoi(strtok(NULL, ","));
coord = Cell_Coord((CELL)atoi(strtok(NULL, ",")));
dir = (DirType)atoi(strtok(NULL, ","));
if (!Map.In_Radar(Coord_Cell(coord))) {
delete air;
} else {
air->Strength = Fixed_To_Cardinal(air->Class->MaxStrength, strength);
if (air->Unlimbo(coord, dir)) {
air->Assign_Mission(AircraftClass::Mission_From_Name(strtok(NULL, ",\n\r")));
} else {
delete air;
}
}
}
}
}
tbuffer += strlen(tbuffer)+1;
}
}
/***********************************************************************************************
* AircraftClass::Write_INI -- Writes the current aircraft objects to an INI file. *
* *
* This routine is used to output the current list of aircraft objects to the INI file *
* buffer specified. It is typically used by the scenario editor. *
* *
* INPUT: buffer -- Pointer to the buffer that holds the INI file data. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::Write_INI(char *buffer)
{
int index;
char uname[10];
char buf[128];
char *tbuffer; // Accumulation buffer of unit IDs.
/*
** First, clear out all existing unit data from the ini file.
*/
tbuffer = buffer + strlen(buffer) + 2;
WWGetPrivateProfileString(INI_Name(), NULL, NULL, tbuffer, ShapeBufferSize-strlen(buffer), buffer);
while (*tbuffer != '\0') {
WWWritePrivateProfileString(INI_Name(), tbuffer, NULL, buffer);
tbuffer += strlen(tbuffer)+1;
}
/*
** Write the unit data out.
*/
for (index = 0; index < Aircraft.Count(); index++) {
AircraftClass * unit;
unit = Aircraft.Ptr(index);
if (!unit->IsInLimbo) {
sprintf(uname, "%03d", index);
sprintf(buf, "%s,%s,%d,%u,%d,%s",
unit->House->Class->IniName,
unit->Class->IniName,
unit->Health_Ratio(),
Coord_Cell(unit->Coord),
unit->PrimaryFacing.Current(),
MissionClass::Mission_Name(unit->Mission)
);
WWWritePrivateProfileString(INI_Name(), uname, buf, buffer);
}
}
}
/***********************************************************************************************
* AircraftClass::Mission_Hunt -- Maintains hunt AI for the aircraft. *
* *
* Hunt AI consists of finding a target and attacking it. If there is no target assigned *
* and this unit doesn't automatically hunt for more targets, then it will change *
* mission to a more passive (land and await further orders) type. *
* *
* INPUT: none *
* *
* OUTPUT: Returns with the number of ticks before calling this routine again. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
int AircraftClass::Mission_Hunt(void)
{
Validate();
if (Class->IsFixedWing) {
enum {
LOOK_FOR_TARGET,
FLY_TO_TARGET,
DROP_BOMBS
};
switch (Status) {
/*
** Acquiring target stage.
*/
case LOOK_FOR_TARGET:
if (Target_Legal(TarCom)) {
Status = FLY_TO_TARGET;
return(1);
} else {
Assign_Target(Greatest_Threat(THREAT_NORMAL));
/*
** If there is no target, then this aircraft should just do its normal thing.
*/
if (!Target_Legal(TarCom)) {
Enter_Idle_Mode();
}
}
break;
/*
** Homing in on target stage.
*/
case FLY_TO_TARGET:
if (Target_Legal(TarCom)) {
IsHoming = true;
if (!PrimaryFacing.Is_Rotating()) {
PrimaryFacing.Set_Desired(Direction(TarCom));
}
if (Distance(TarCom) < 0x0380) {
IsHoming = false;
Status = DROP_BOMBS;
return(1);
}
} else {
Status = LOOK_FOR_TARGET;
}
break;
/*
** Dropping a stream of bombs phase.
*/
case DROP_BOMBS:
if (!Ammo) {
AttacksRemaining--;
if (!AttacksRemaining) {
Assign_Mission(MISSION_RETREAT);
Commence();
} else {
Ammo = Class->MaxAmmo;
Status = LOOK_FOR_TARGET;
}
}
if (!Target_Legal(TarCom)) {
Status = LOOK_FOR_TARGET;
} else {
Fire_At(TarCom, 0);
Map[::As_Cell(TarCom)].Incoming(Coord, true);
return(5);
}
break;
}
} else {
if (!Ammo) {
Enter_Idle_Mode();
} else {
Assign_Mission(MISSION_ATTACK);
return(1);
// return(FootClass::Mission_Hunt());
}
}
return(TICKS_PER_SECOND);
}
/***********************************************************************************************
* AircraftClass::AI -- Processes the normal non-graphic AI for the aircraft. *
* *
* This handles the non-graphic AI processing for the aircraft. This usually entails *
* maintenance and other AI functions. *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::AI(void)
{
Validate();
/*
** A Mission change can always occur if the aircraft is landed or flying.
*/
if (!IsLanding && !IsTakingOff) {
Commence();
}
FootClass::AI();
/*
** A Mission change can always occur if the aircraft is landed or flying.
*/
if (!IsLanding && !IsTakingOff) {
Commence();
}
/*
** Handle any body rotation at this time. Body rotation can occur even if the
** flying object is not actually moving.
*/
if (PrimaryFacing.Is_Rotating()) {
if (PrimaryFacing.Rotation_Adjust(Class->ROT)) {
Mark();
}
}
if (Class->IsFixedWing) {
SecondaryFacing = PrimaryFacing;
}
if (SecondaryFacing.Is_Rotating()) {
if (SecondaryFacing.Rotation_Adjust(Class->ROT)) {
Mark();
}
}
if (Physics(Coord, PrimaryFacing) != RESULT_NONE) {
Mark();
}
/*
** Perform sighting every so often as controlled by the sight timer.
*/
if (IsOwnedByPlayer && Class->SightRange && SightTimer.Expired()) {
Map.Sight_From(Coord_Cell(Coord), Class->SightRange, false);
SightTimer = TICKS_PER_SECOND;
}
/*
** Handle landing and taking off logic. Helicopters are prime users of this technique. The
** aircraft will either gain or lose altitude as appropriate. As the aircraft transitions
** between flying level and ground level, it will be moved into the appropriate render
** layer.
*/
if (Is_Door_Closed() && (IsLanding || IsTakingOff)) {
Mark();
LayerType layer = In_Which_Layer();
if (IsLanding) {
if (Altitude) Altitude--;
if (!Altitude) {
IsLanding = false;
Set_Speed(0);
if (Target_Legal(NavCom) && As_Techno(NavCom) == Contact_With_Whom()) {
if (In_Radio_Contact() && Transmit_Message(RADIO_IM_IN) != RADIO_ROGER) {
Scatter(0, true);
}
}
}
}
if (IsTakingOff) {
Altitude++;
if (Altitude >= FLIGHT_LEVEL) {
Altitude = FLIGHT_LEVEL;
IsTakingOff = false;
}
}
/*
** Make adjustments for altitude by moving from one layer to another as
** necessary.
*/
if (layer != In_Which_Layer()) {
/*
** When the aircraft is about to enter the ground layer, perform on last
** check to see if it is legal to enter that location. If not, then
** start the take off process. Let the normal logic handle this
** change of plans.
*/
bool ok = true;
if (In_Which_Layer() == LAYER_GROUND) {
if (!Is_LZ_Clear(::As_Target(Coord_Cell(Coord)))) {
IsTakingOff = true;
Altitude++;
ok = false;
}
}
if (ok) {
/*
** If landing in a cell that already contains an object, then
** the landing attempt must be aborted.
*/
Map.Remove(this, layer);
Map.Submit(this, In_Which_Layer());
/*
** When the aircraft is close to the ground, it should exist as a ground object.
** This aspect is controlled by the Place_Down and Pick_Up functions.
*/
if (In_Which_Layer() == LAYER_GROUND) {
Assign_Destination(TARGET_NONE); // Clear the navcom.
Transmit_Message(RADIO_TETHER);
Map.Place_Down(Coord_Cell(Coord), this);
if (IsOwnedByPlayer) {
Map.Sight_From(Coord_Cell(Coord), 1, false);
}
} else {
Transmit_Message(RADIO_UNTETHER);
Map.Pick_Up(Coord_Cell(Coord), this);
/*
** If the navigation computer is not attached to the object this
** aircraft is in radio contact with, then assume that radio
** contact is now superfluous. Break radio contact.
*/
if (In_Radio_Contact() && Target_Legal(NavCom) && NavCom != Contact_With_Whom()->As_Target()) {
Transmit_Message(RADIO_OVER_OUT);
}
}
}
}
}
/*
** Always flag the map draw process to occur if there is an aircraft in the view.
** This ensures that it will be rendered even if there is nothing else that flagged
** the map to be redrawn.
*/
if (Map.In_View(Coord_Cell(Coord))) {
Map.Flag_To_Redraw(false);
Map.DisplayClass::IsToRedraw = true;
}
/*
** When aircraft leave the edge of the map, they might get destroyed. This occurs if the
** aircraft is a non-player produced unit and it has completed its mission. A transport
** helicopter that has already delivered reinforcements is a good example of this.
*/
if (!Map.In_Radar(Coord_Cell(Coord))) {
if (Mission == MISSION_RETREAT /*|| (*this == AIRCRAFT_CARGO && !Is_Something_Attached())*/) {
/*
** Check to see if there are any civilians aboard. If so, then flag the house
** that the civilian evacuation trigger event has been fulfilled.
*/
while (Is_Something_Attached()) {
FootClass * obj = Detach_Object();
if (obj->What_Am_I() == RTTI_INFANTRY && ((InfantryClass *)obj)->Class->IsCivilian && !((InfantryClass *)obj)->IsTechnician) {
House->IsCivEvacuated = true;
}
/*
** Transport planes that leave can only be because they carry purchased
** equipment and must be have their cost refunded.
*/
if (*this == AIRCRAFT_CARGO) {
House->Refund_Money(obj->Class_Of().Cost_Of());
}
delete obj;
}
Stun();
delete this;
return;
}
} else {
IsLocked = true;
// House->NewAScan |= (1L << Class->Type);
#ifdef NEVER
/*
** Transport helicopters must ensure that their passengers are properly
** considered "alive" by setting the appropriate scan bits.
*/
FootClass const * foot = Attached_Object();
while (foot) {
switch (foot->What_Am_I()) {
case RTTI_UNIT:
House->NewUScan |= (1L << ((UnitTypeClass const &)Class_Of()).Type);
break;
case RTTI_INFANTRY:
House->NewIScan |= (1L << ((InfantryTypeClass const &)Class_Of()).Type);
break;
}
foot = (FootClass const *)foot->Next;
}
#endif
}
}
/***********************************************************************************************
* AircraftClass::Mark -- Flags cells under the aircraft so that they will be redrawn. *
* *
* This routine is used to flag the cells under the aircraft so that those cells will *
* be redrawn during the next map drawing process. This is a necessary step whenever the *
* aircraft moves or changes shape. *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
bool AircraftClass::Mark(MarkType mark)
{
Validate();
if (FootClass::Mark(mark)) {
Map.Refresh_Cells(Coord_Cell(Coord), Occupy_List());
Map.Refresh_Cells(Coord_Cell(Coord), Overlap_List());
return(true);
}
return(false);
}
/***********************************************************************************************
* AircraftClass::Overlap_List -- Returns with list of cells the aircraft overlaps. *
* *
* When aircraft are flying, they can overlap quite a number of cells. These cells can *
* be determined from the coordinate where the aircraft is centered and the size of the *
* aircraft's shape. Landed aircraft are a special case and are usually much smaller *
* than when flying. *
* *
* INPUT: none *
* *
* OUTPUT: Returns with a pointer to a cell offset list that specifies all cells that *
* the aircraft overlaps given the aircraft's current state. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/26/1994 JLB : Created. *
*=============================================================================================*/
short const *AircraftClass::Overlap_List(void) const
{
Validate();
static short const _list[] = {
-(MAP_CELL_W-1), -MAP_CELL_W, -(MAP_CELL_W+1),
-1, 0, 1,
(MAP_CELL_W-1), MAP_CELL_W, (MAP_CELL_W+1),
-((MAP_CELL_W*2)-1), -(MAP_CELL_W*2), -((MAP_CELL_W*2)+1),
-((MAP_CELL_W*3)-1), -(MAP_CELL_W*3), -((MAP_CELL_W*3)+1),
REFRESH_EOL
};
if (Altitude) {
return(_list);
//return Coord_Spillage_List(Coord, 25);
}
return(Class->Overlap_List());
}
/***********************************************************************************************
* AircraftClass::Init -- Initialize the aircraft system to an empty state. *
* *
* This routine is used to clear out the aircraft allocation system. It is called in *
* preparation for a scenario load or save game load. *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 09/24/1994 JLB : Created. *
*=============================================================================================*/
void AircraftClass::Init(void)
{
AircraftClass *ptr;
Aircraft.Free_All();
ptr = new AircraftClass();
VTable = ((void **)(((char *)ptr) + sizeof(AbstractClass) - 4))[0];
delete ptr;
}
/***********************************************************************************************
* AircraftClass::Mission_Unload -- Handles unloading cargo. *
* *
* This function is used to handle finding, heading toward, landing, and unloading the *
* cargo from the aircraft. Once unloading of cargo has occurred, then the aircraft follows *
* a different mission. *
* *
* INPUT: none *
* *
* OUTPUT: Returns the number of game ticks to delay before calling this function again. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 10/31/94 JLB : Created. *
*=============================================================================================*/
int AircraftClass::Mission_Unload(void)
{
Validate();
if (Class->IsFixedWing) {
enum {
PICK_AIRSTRIP,
FLY_TO_AIRSTRIP,