static void
ilwrath_intelligence (ELEMENT *ShipPtr, EVALUATE_DESC *ObjectsOfConcern,
COUNT ConcernCounter)
{
EVALUATE_DESC *lpEvalDesc;
STARSHIP *StarShipPtr;
lpEvalDesc = &ObjectsOfConcern[ENEMY_SHIP_INDEX];
lpEvalDesc->MoveState = PURSUE;
if (lpEvalDesc->ObjectPtr && lpEvalDesc->which_turn <= 10)
/* don't want to dodge when you could be flaming */
ObjectsOfConcern[ENEMY_WEAPON_INDEX].ObjectPtr = 0;
ship_intelligence (ShipPtr, ObjectsOfConcern, ConcernCounter);
GetElementStarShip (ShipPtr, &StarShipPtr);
if (lpEvalDesc->ObjectPtr
&& (lpEvalDesc->which_turn <= 6
|| (lpEvalDesc->which_turn <= 10
&& ObjectsOfConcern[ENEMY_WEAPON_INDEX].which_turn <= 10)))
{
StarShipPtr->ship_input_state &= ~SPECIAL;
if (OBJECT_CLOAKED (ShipPtr))
{
StarShipPtr->ship_input_state &= ~LEFT | RIGHT;
StarShipPtr->ship_input_state |= THRUST;
}
StarShipPtr->ship_input_state |= WEAPON;
}
else if (StarShipPtr->special_counter == 0
&& (LOBYTE (GLOBAL (CurrentActivity)) != IN_ENCOUNTER
|| !GET_GAME_STATE (PROBE_ILWRATH_ENCOUNTER)))
{
StarShipPtr->ship_input_state &= ~SPECIAL;
if (!OBJECT_CLOAKED (ShipPtr)
&& !(StarShipPtr->ship_input_state & WEAPON))
StarShipPtr->ship_input_state |= SPECIAL;
}
}
static void
spawn_point_defense (PELEMENT ElementPtr)
{
STARSHIPPTR StarShipPtr;
GetElementStarShip (ElementPtr, &StarShipPtr);
if (ElementPtr->state_flags & PLAYER_SHIP)
{
HELEMENT hDefense;
hDefense = AllocElement ();
if (hDefense)
{
ELEMENTPTR DefensePtr;
LockElement (hDefense, &DefensePtr);
DefensePtr->state_flags = APPEARING | NONSOLID | FINITE_LIFE |
(ElementPtr->state_flags & (GOOD_GUY | BAD_GUY));
{
DefensePtr->death_func = spawn_point_defense;
}
GetElementStarShip (ElementPtr, &StarShipPtr);
SetElementStarShip (DefensePtr, StarShipPtr);
UnlockElement (hDefense);
PutElement (hDefense);
}
}
else
{
BOOLEAN PaidFor;
HELEMENT hObject, hNextObject;
ELEMENTPTR ShipPtr;
PaidFor = FALSE;
LockElement (StarShipPtr->hShip, &ShipPtr);
for (hObject = GetTailElement (); hObject; hObject = hNextObject)
{
ELEMENTPTR ObjectPtr;
LockElement (hObject, &ObjectPtr);
hNextObject = GetPredElement (ObjectPtr);
if (ObjectPtr != ShipPtr && CollidingElement (ObjectPtr) &&
!OBJECT_CLOAKED (ObjectPtr))
{
#define LASER_RANGE (UWORD)100
SIZE delta_x, delta_y;
delta_x = ObjectPtr->next.location.x -
ShipPtr->next.location.x;
delta_y = ObjectPtr->next.location.y -
ShipPtr->next.location.y;
if (delta_x < 0)
delta_x = -delta_x;
if (delta_y < 0)
delta_y = -delta_y;
delta_x = WORLD_TO_DISPLAY (delta_x);
delta_y = WORLD_TO_DISPLAY (delta_y);
if ((UWORD)delta_x <= LASER_RANGE &&
(UWORD)delta_y <= LASER_RANGE &&
(UWORD)delta_x * (UWORD)delta_x +
(UWORD)delta_y * (UWORD)delta_y <=
LASER_RANGE * LASER_RANGE)
{
HELEMENT hPointDefense;
LASER_BLOCK LaserBlock;
if (!PaidFor)
{
if (!DeltaEnergy (ShipPtr, -SPECIAL_ENERGY_COST))
break;
ProcessSound (SetAbsSoundIndex (
/* POINT_DEFENSE_LASER */
StarShipPtr->RaceDescPtr->ship_data.ship_sounds, 1));
StarShipPtr->special_counter =
StarShipPtr->RaceDescPtr->characteristics.special_wait;
PaidFor = TRUE;
}
LaserBlock.cx = ShipPtr->next.location.x;
LaserBlock.cy = ShipPtr->next.location.y;
LaserBlock.face = 0;
LaserBlock.ex = ObjectPtr->next.location.x
- ShipPtr->next.location.x;
LaserBlock.ey = ObjectPtr->next.location.y
- ShipPtr->next.location.y;
LaserBlock.sender = (ShipPtr->state_flags & (GOOD_GUY | BAD_GUY))
| IGNORE_SIMILAR;
LaserBlock.pixoffs = 0;
LaserBlock.color = BUILD_COLOR (MAKE_RGB15 (0x1F, 0x1F, 0x1F), 0x0F);
hPointDefense = initialize_laser (&LaserBlock);
if (hPointDefense)
{
ELEMENTPTR PDPtr;
LockElement (hPointDefense, &PDPtr);
SetElementStarShip (PDPtr, StarShipPtr);
PDPtr->hTarget = 0;
UnlockElement (hPointDefense);
PutElement (hPointDefense);
}
}
}
UnlockElement (hObject);
}
UnlockElement (StarShipPtr->hShip);
}
}
static void
butt_missile_preprocess (ELEMENT *ElementPtr)
{
if (ElementPtr->turn_wait > 0)
--ElementPtr->turn_wait;
else
{
COUNT facing;
// COUNT num_frames;
SIZE delta_x, delta_y, delta_facing;
ELEMENT *EnemyPtr;
facing = GetFrameIndex (ElementPtr->next.image.frame);
if (ElementPtr->hTarget)
{
LockElement (ElementPtr->hTarget, &EnemyPtr);
delta_x = EnemyPtr->current.location.x
- ElementPtr->current.location.x;
delta_x = WRAP_DELTA_X (delta_x);
delta_y = EnemyPtr->current.location.y
- ElementPtr->current.location.y;
delta_y = WRAP_DELTA_Y (delta_y);
/* num_frames = (square_root ((long)delta_x * delta_x
+ (long)delta_y * delta_y)) / DISCRIMINATOR_SPEED;
if (num_frames == 0)
num_frames = 1;
GetNextVelocityComponents (&EnemyPtr->velocity,
&delta_x, &delta_y, num_frames);
// Lead the target by its apparent trajectory.
delta_x = (EnemyPtr->current.location.x + (delta_x / 2))
- ElementPtr->current.location.x;
delta_y = (EnemyPtr->current.location.y + (delta_y / 2))
- ElementPtr->current.location.y; */
delta_facing = NORMALIZE_FACING (
ANGLE_TO_FACING (ARCTAN (delta_x, delta_y)) - facing);
if (delta_facing > 0 && !OBJECT_CLOAKED(EnemyPtr))
{
if (delta_facing == ANGLE_TO_FACING (HALF_CIRCLE))
facing += (((BYTE)TFB_Random () & 1) << 1) - 1;
else if (delta_facing < ANGLE_TO_FACING (HALF_CIRCLE))
++facing;
else
--facing;
}
ElementPtr->next.image.frame =
SetAbsFrameIndex (ElementPtr->next.image.frame, facing);
ElementPtr->state_flags |= CHANGING;
SetVelocityVector (&ElementPtr->velocity, DISCRIMINATOR_SPEED, facing);
UnlockElement (ElementPtr->hTarget);
}
else if (TrackShip (ElementPtr, &facing) > 0)
{
ElementPtr->next.image.frame =
SetAbsFrameIndex (ElementPtr->next.image.frame,
facing);
ElementPtr->state_flags |= CHANGING;
SetVelocityVector (&ElementPtr->velocity,
DISCRIMINATOR_SPEED, facing);
}
ElementPtr->turn_wait = TRACK_WAIT;
}
}