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action.cpp
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/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2012 Warzone 2100 Project
Warzone 2100 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 2 of the License, or
(at your option) any later version.
Warzone 2100 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 Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file action.c
*
* Functions for setting the action of a droid.
*
*/
#include "lib/framework/frame.h"
#include "lib/script/script.h"
#include "lib/sound/audio.h"
#include "lib/sound/audio_id.h"
#include "lib/netplay/netplay.h"
#include "action.h"
#include "combat.h"
#include "geometry.h"
#include "intdisplay.h"
#include "mission.h"
#include "projectile.h"
#include "qtscript.h"
#include "random.h"
#include "research.h"
#include "scriptcb.h"
#include "scripttabs.h"
#include "transporter.h"
#include "mapgrid.h"
/* attack run distance */
#define VTOL_ATTACK_LENGTH 1000
#define VTOL_ATTACK_WIDTH 200
#define VTOL_ATTACK_TARDIST 400
// turret rotation limit
#define VTOL_TURRET_LIMIT DEG(45)
#define VTOL_TURRET_LIMIT_BOMB DEG(60)
#define VTOL_ATTACK_AUDIO_DELAY (3*GAME_TICKS_PER_SEC)
/** Time to pause before a droid blows up. */
#define ACTION_DESTRUCT_TIME 2000
/** Droids heavier than this rotate and pitch more slowly. */
#define HEAVY_WEAPON_WEIGHT 50000
#define ACTION_TURRET_ROTATION_RATE 45
#define REPAIR_PITCH_LOWER 30
#define REPAIR_PITCH_UPPER -15
/* How many tiles to pull back. */
#define PULL_BACK_DIST 10
// data required for any action
struct DROID_ACTION_DATA
{
DROID_ACTION action;
UDWORD x,y;
//multiple action target info
BASE_OBJECT *psObj;
BASE_STATS *psStats;
};
// Check if a droid has stopped moving
#define DROID_STOPPED(psDroid) \
(psDroid->sMove.Status == MOVEINACTIVE || psDroid->sMove.Status == MOVEHOVER || \
psDroid->sMove.Status == MOVESHUFFLE)
/** Radius for search when looking for VTOL landing position */
static const int vtolLandingRadius = 23;
/**
* @typedef tileMatchFunction
*
* @brief pointer to a 'tile search function', used by spiralSearch()
*
* @param x,y are the coordinates that should be inspected.
*
* @param data a pointer to state data, allows the search function to retain
* state in between calls and can be used as a means of returning
* its result to the caller of spiralSearch().
*
* @return true when the search has finished, false when the search should
* continue.
*/
typedef bool (*tileMatchFunction)(int x, int y, void* matchState);
const char* getDroidActionName(DROID_ACTION action)
{
static const char* name[] =
{
"DACTION_NONE", // not doing anything
"DACTION_MOVE", // 1 moving to a location
"DACTION_BUILD", // building a structure
"DACTION_BUILD_FOUNDATION", // 3 building a foundation for a structure
"DACTION_DEMOLISH", // demolishing a structure
"DACTION_REPAIR", // 5 repairing a structure
"DACTION_ATTACK", // attacking something
"DACTION_OBSERVE", // 7 observing something
"DACTION_FIRESUPPORT", // attacking something visible by a sensor droid
"DACTION_SULK", // 9 refuse to do anything aggressive for a fixed time
"DACTION_DESTRUCT", // self destruct
"DACTION_TRANSPORTOUT", // 11 move transporter offworld
"DACTION_TRANSPORTWAITTOFLYIN", // wait for timer to move reinforcements in
"DACTION_TRANSPORTIN", // 13 move transporter onworld
"DACTION_DROIDREPAIR", // repairing a droid
"DACTION_RESTORE", // 15 restore resistance points of a structure
"DACTION_UNUSED",
"DACTION_MOVEFIRE", // 17
"DACTION_MOVETOBUILD", // moving to a new building location
"DACTION_MOVETODEMOLISH", // 19 moving to a new demolition location
"DACTION_MOVETOREPAIR", // moving to a new repair location
"DACTION_BUILDWANDER", // 21 moving around while building
"DACTION_FOUNDATION_WANDER", // moving around while building the foundation
"DACTION_MOVETOATTACK", // 23 moving to a target to attack
"DACTION_ROTATETOATTACK", // rotating to a target to attack
"DACTION_MOVETOOBSERVE", // 25 moving to be able to see a target
"DACTION_WAITFORREPAIR", // waiting to be repaired by a facility
"DACTION_MOVETOREPAIRPOINT", // 27 move to repair facility repair point
"DACTION_WAITDURINGREPAIR", // waiting to be repaired by a facility
"DACTION_MOVETODROIDREPAIR", // 29 moving to a new location next to droid to be repaired
"DACTION_MOVETORESTORE", // moving to a low resistance structure
"DACTION_UNUSED2",
"DACTION_MOVETOREARM", // (32)moving to a rearming pad - VTOLS
"DACTION_WAITFORREARM", // (33)waiting for rearm - VTOLS
"DACTION_MOVETOREARMPOINT", // (34)move to rearm point - VTOLS - this actually moves them onto the pad
"DACTION_WAITDURINGREARM", // (35)waiting during rearm process- VTOLS
"DACTION_VTOLATTACK", // (36) a VTOL droid doing attack runs
"DACTION_CLEARREARMPAD", // (37) a VTOL droid being told to get off a rearm pad
"DACTION_RETURNTOPOS", // (38) used by scout/patrol order when returning to route
"DACTION_FIRESUPPORT_RETREAT", // (39) used by firesupport order when sensor retreats
"ACTION UNKNOWN",
"DACTION_CIRCLE" // (41) circling while engaging
};
ASSERT_OR_RETURN(NULL, action < sizeof(name) / sizeof(name[0]), "DROID_ACTION out of range: %u", action);
return name[action];
}
/* Check if a target is at correct range to attack */
static bool actionInAttackRange(DROID *psDroid, BASE_OBJECT *psObj, int weapon_slot)
{
SDWORD dx, dy, radSq, rangeSq, longRange;
WEAPON_STATS *psStats;
int compIndex;
CHECK_DROID(psDroid);
if (psDroid->asWeaps[0].nStat == 0)
{
return false;
}
dx = (SDWORD)psDroid->pos.x - (SDWORD)psObj->pos.x;
dy = (SDWORD)psDroid->pos.y - (SDWORD)psObj->pos.y;
radSq = dx*dx + dy*dy;
compIndex = psDroid->asWeaps[weapon_slot].nStat;
ASSERT_OR_RETURN( false, compIndex < numWeaponStats, "Invalid range referenced for numWeaponStats, %d > %d", compIndex, numWeaponStats);
psStats = asWeaponStats + compIndex;
if (psDroid->order.type == DORDER_ATTACKTARGET
&& secondaryGetState(psDroid, DSO_HALTTYPE) == DSS_HALT_HOLD)
{
longRange = proj_GetLongRange(psStats);
rangeSq = longRange * longRange;
}
else
{
switch (psDroid->secondaryOrder & DSS_ARANGE_MASK)
{
case DSS_ARANGE_DEFAULT:
//if (psStats->shortHit > psStats->longHit)
if (weaponShortHit(psStats, psDroid->player) > weaponLongHit(psStats, psDroid->player))
{
rangeSq = psStats->shortRange * psStats->shortRange;
}
else
{
longRange = proj_GetLongRange(psStats);
rangeSq = longRange * longRange;
}
break;
case DSS_ARANGE_SHORT:
rangeSq = psStats->shortRange * psStats->shortRange;
break;
case DSS_ARANGE_LONG:
longRange = proj_GetLongRange(psStats);
rangeSq = longRange * longRange;
break;
default:
ASSERT(!"unknown attackrange order", "unknown attack range order");
longRange = proj_GetLongRange(psStats);
rangeSq = longRange * longRange;
break;
}
}
/* check max range */
if ( radSq <= rangeSq )
{
/* check min range */
rangeSq = psStats->minRange * psStats->minRange;
if ( radSq >= rangeSq || !proj_Direct( psStats ) )
{
return true;
}
}
return false;
}
// check if a target is within weapon range
bool actionInRange(DROID *psDroid, BASE_OBJECT *psObj, int weapon_slot)
{
SDWORD dx, dy, radSq, rangeSq, longRange;
WEAPON_STATS *psStats;
int compIndex;
CHECK_DROID(psDroid);
if (psDroid->asWeaps[0].nStat == 0)
{
return false;
}
compIndex = psDroid->asWeaps[weapon_slot].nStat;
ASSERT_OR_RETURN( false, compIndex < numWeaponStats, "Invalid range referenced for numWeaponStats, %d > %d", compIndex, numWeaponStats);
psStats = asWeaponStats + compIndex;
dx = (SDWORD)psDroid->pos.x - (SDWORD)psObj->pos.x;
dy = (SDWORD)psDroid->pos.y - (SDWORD)psObj->pos.y;
radSq = dx*dx + dy*dy;
longRange = proj_GetLongRange(psStats);
rangeSq = longRange * longRange;
/* check max range */
if ( radSq <= rangeSq )
{
/* check min range */
rangeSq = psStats->minRange * psStats->minRange;
if ( radSq >= rangeSq || !proj_Direct( psStats ) )
{
return true;
}
}
return false;
}
// check if a target is inside minimum weapon range
static bool actionInsideMinRange(DROID *psDroid, BASE_OBJECT *psObj, WEAPON_STATS *psStats)
{
SDWORD dx, dy, radSq, rangeSq, minRange;
CHECK_DROID(psDroid);
CHECK_OBJECT(psObj);
if (!psStats)
{
psStats = getWeaponStats(psDroid, 0);
}
/* if I am a multi-turret droid */
if (psDroid->asWeaps[0].nStat == 0)
{
return false;
}
dx = (SDWORD)psDroid->pos.x - (SDWORD)psObj->pos.x;
dy = (SDWORD)psDroid->pos.y - (SDWORD)psObj->pos.y;
radSq = dx*dx + dy*dy;
minRange = (SDWORD)psStats->minRange;
rangeSq = minRange * minRange;
// check min range
if ( radSq <= rangeSq )
{
return true;
}
return false;
}
// Realign turret
void actionAlignTurret(BASE_OBJECT *psObj, int weapon_slot)
{
int32_t rotation;
uint16_t nearest = 0;
uint16_t tRot;
uint16_t tPitch;
//get the maximum rotation this frame
rotation = gameTimeAdjustedIncrement(DEG(ACTION_TURRET_ROTATION_RATE));
switch (psObj->type)
{
case OBJ_DROID:
tRot = ((DROID *)psObj)->asWeaps[weapon_slot].rot.direction;
tPitch = ((DROID *)psObj)->asWeaps[weapon_slot].rot.pitch;
break;
case OBJ_STRUCTURE:
tRot = ((STRUCTURE *)psObj)->asWeaps[weapon_slot].rot.direction;
tPitch = ((STRUCTURE *)psObj)->asWeaps[weapon_slot].rot.pitch;
// now find the nearest 90 degree angle
nearest = (uint16_t)((tRot + DEG(45)) / DEG(90) * DEG(90)); // Cast wrapping indended.
break;
default:
ASSERT(!"invalid object type", "invalid object type");
return;
}
tRot += clip(angleDelta(nearest - tRot), -rotation, rotation); // Addition wrapping intended.
// align the turret pitch
tPitch += clip(angleDelta(0 - tPitch), -rotation/2, rotation/2); // Addition wrapping intended.
switch (psObj->type)
{
case OBJ_DROID:
((DROID *)psObj)->asWeaps[weapon_slot].rot.direction = tRot;
((DROID *)psObj)->asWeaps[weapon_slot].rot.pitch = tPitch;
break;
case OBJ_STRUCTURE:
((STRUCTURE *)psObj)->asWeaps[weapon_slot].rot.direction = tRot;
((STRUCTURE *)psObj)->asWeaps[weapon_slot].rot.pitch = tPitch;
break;
default:
ASSERT(!"invalid object type", "invalid object type");
return;
}
}
/* returns true if on target */
bool actionTargetTurret(BASE_OBJECT *psAttacker, BASE_OBJECT *psTarget, WEAPON *psWeapon)
{
WEAPON_STATS *psWeapStats = asWeaponStats + psWeapon->nStat;
uint16_t tRotation, tPitch;
int32_t rotRate, pitchRate;
uint16_t targetRotation, targetPitch;
int32_t pitchError;
int32_t rotationError, dx, dy, dz;
int32_t rotationTolerance = 0;
bool onTarget;
int32_t dxy;
int32_t pitchLowerLimit, pitchUpperLimit;
bool bRepair;
if (!psTarget)
{
return false;
}
bRepair = psAttacker->type == OBJ_DROID && ((DROID *)psAttacker)->droidType == DROID_REPAIR;
// these are constants now and can be set up at the start of the function
rotRate = DEG(ACTION_TURRET_ROTATION_RATE) * 4;
pitchRate = DEG(ACTION_TURRET_ROTATION_RATE) * 2;
// extra heavy weapons on some structures need to rotate and pitch more slowly
if (psWeapStats->weight > HEAVY_WEAPON_WEIGHT && !bRepair)
{
UDWORD excess = DEG(100) * (psWeapStats->weight - HEAVY_WEAPON_WEIGHT) / psWeapStats->weight;
rotRate = DEG(ACTION_TURRET_ROTATION_RATE) * 2 - excess;
pitchRate = rotRate / 2;
}
tRotation = psWeapon->rot.direction;
tPitch = psWeapon->rot.pitch;
//set the pitch limits based on the weapon stats of the attacker
pitchLowerLimit = pitchUpperLimit = 0;
if (psAttacker->type == OBJ_STRUCTURE)
{
pitchLowerLimit = DEG(psWeapStats->minElevation);
pitchUpperLimit = DEG(psWeapStats->maxElevation);
}
else if (psAttacker->type == OBJ_DROID)
{
DROID *psDroid = (DROID *)psAttacker;
if (psDroid->droidType == DROID_WEAPON || psDroid->droidType == DROID_TRANSPORTER || psDroid->droidType == DROID_SUPERTRANSPORTER
|| psDroid->droidType == DROID_COMMAND || psDroid->droidType == DROID_CYBORG
|| psDroid->droidType == DROID_CYBORG_SUPER)
{
pitchLowerLimit = DEG(psWeapStats->minElevation);
pitchUpperLimit = DEG(psWeapStats->maxElevation);
}
else if ( psDroid->droidType == DROID_REPAIR )
{
pitchLowerLimit = DEG(REPAIR_PITCH_LOWER);
pitchUpperLimit = DEG(REPAIR_PITCH_UPPER);
}
}
//get the maximum rotation this frame
rotRate = gameTimeAdjustedIncrement(rotRate);
rotRate = MAX(rotRate, DEG(1));
pitchRate = gameTimeAdjustedIncrement(pitchRate);
pitchRate = MAX(pitchRate, DEG(1));
//and point the turret at target
targetRotation = calcDirection(psAttacker->pos.x, psAttacker->pos.y, psTarget->pos.x, psTarget->pos.y);
//restrict rotationerror to =/- 180 degrees
rotationError = angleDelta(targetRotation - (tRotation + psAttacker->rot.direction));
tRotation += clip(rotationError, -rotRate, rotRate); // Addition wrapping intentional.
if (psAttacker->type == OBJ_DROID && isVtolDroid((DROID *)psAttacker))
{
// limit the rotation for vtols
int32_t limit = VTOL_TURRET_LIMIT;
if (psWeapStats->weaponSubClass == WSC_BOMB || psWeapStats->weaponSubClass == WSC_EMP)
{
limit = 0; // Don't turn bombs.
rotationTolerance = VTOL_TURRET_LIMIT_BOMB;
}
tRotation = (uint16_t)clip(angleDelta(tRotation), -limit, limit); // Cast wrapping intentional.
}
onTarget = abs(angleDelta(targetRotation - (tRotation + psAttacker->rot.direction))) <= rotationTolerance;
/* Set muzzle pitch if not repairing or outside minimum range */
if (!bRepair && objPosDiffSq(psAttacker, psTarget) > psWeapStats->minRange * psWeapStats->minRange)
{
dx = psTarget->pos.x - psAttacker->pos.x;
dy = psTarget->pos.y - psAttacker->pos.y;
dz = psTarget->pos.z - psAttacker->pos.z;
/* get target distance */
dxy = iHypot(dx, dy);
targetPitch = iAtan2(dz, dxy);
targetPitch = (uint16_t)clip(angleDelta(targetPitch), pitchLowerLimit, pitchUpperLimit); // Cast wrapping intended.
pitchError = angleDelta(targetPitch - tPitch);
tPitch += clip(pitchError, -pitchRate, pitchRate); // Addition wrapping intended.
onTarget = onTarget && targetPitch == tPitch;
}
psWeapon->rot.direction = tRotation;
psWeapon->rot.pitch = tPitch;
return onTarget;
}
// return whether a droid can see a target to fire on it
bool actionVisibleTarget(DROID *psDroid, BASE_OBJECT *psTarget, int weapon_slot)
{
CHECK_DROID(psDroid);
ASSERT_OR_RETURN(false, psTarget != NULL, "Target is NULL");
if (!psTarget->visible[psDroid->player])
{
return false;
}
if ((psDroid->numWeaps == 0 || isVtolDroid(psDroid)) && visibleObject(psDroid, psTarget, false))
{
return true;
}
const int compIndex = psDroid->asWeaps[weapon_slot].nStat;
ASSERT_OR_RETURN( false, compIndex < numWeaponStats, "Invalid range referenced for numWeaponStats, %d > %d", compIndex, numWeaponStats);
return (orderState(psDroid, DORDER_FIRESUPPORT) || visibleObject(psDroid, psTarget, false))
&& lineOfFire(psDroid, psTarget, weapon_slot, true);
}
static void actionAddVtolAttackRun( DROID *psDroid )
{
BASE_OBJECT *psTarget;
CHECK_DROID(psDroid);
if ( psDroid->psActionTarget[0] != NULL )
{
psTarget = psDroid->psActionTarget[0];
}
else if (psDroid->order.psObj != NULL )
{
psTarget = psDroid->order.psObj;
}
else
{
return;
}
/* get normal vector from droid to target */
Vector2i delta = removeZ(psTarget->pos - psDroid->pos);
/* get magnitude of normal vector (Pythagorean theorem) */
int dist = std::max(iHypot(delta), 1);
/* add waypoint behind target attack length away*/
Vector2i dest = removeZ(psTarget->pos) + delta * VTOL_ATTACK_LENGTH / dist;
if (!worldOnMap(dest))
{
debug( LOG_NEVER, "*** actionAddVtolAttackRun: run off map! ***" );
}
else
{
moveDroidToDirect(psDroid, dest.x, dest.y);
}
}
static void actionUpdateVtolAttack( DROID *psDroid )
{
WEAPON_STATS *psWeapStats[DROID_MAXWEAPS] = { NULL, NULL, NULL };
UBYTE i;
CHECK_DROID(psDroid);
/* don't do attack runs whilst returning to base */
if (psDroid->order.type == DORDER_RTB)
{
return;
}
/* if I am a multi-turret droid */
if (psDroid->numWeaps > 1)
{
for(i = 0;i < psDroid->numWeaps;i++)
{
if (psDroid->asWeaps[i].nStat != 0)
{
psWeapStats[i] = asWeaponStats + psDroid->asWeaps[i].nStat;
ASSERT(psWeapStats != NULL, "invalid weapon stats pointer");
break;
}
}
}
else
{
if (psDroid->asWeaps[0].nStat > 0)
{
psWeapStats[0] = asWeaponStats + psDroid->asWeaps[0].nStat;
ASSERT(psWeapStats != NULL, "invalid weapon stats pointer");
}
}
/* order back to base after fixed number of attack runs */
if ( psWeapStats[0] != NULL )
{
if (vtolEmpty(psDroid))
{
moveToRearm(psDroid);
return;
}
}
/* circle around target if hovering and not cyborg */
if (psDroid->sMove.Status == MOVEHOVER && !cyborgDroid(psDroid))
{
actionAddVtolAttackRun( psDroid );
}
}
static void actionUpdateTransporter( DROID *psDroid )
{
CHECK_DROID(psDroid);
//check if transporter has arrived
if (updateTransporter(psDroid))
{
// Got to destination
psDroid->action = DACTION_NONE;
return;
}
}
// calculate a position for units to pull back to if they
// need to increase the range between them and a target
static void actionCalcPullBackPoint(BASE_OBJECT *psObj, BASE_OBJECT *psTarget, SDWORD *px, SDWORD *py)
{
SDWORD xdiff,ydiff, len;
// get the vector from the target to the object
xdiff = (SDWORD)psObj->pos.x - (SDWORD)psTarget->pos.x;
ydiff = (SDWORD)psObj->pos.y - (SDWORD)psTarget->pos.y;
len = iHypot(xdiff, ydiff);
if (len == 0)
{
xdiff = TILE_UNITS;
ydiff = TILE_UNITS;
}
else
{
xdiff = (xdiff * TILE_UNITS) / len;
ydiff = (ydiff * TILE_UNITS) / len;
}
// create the position
*px = (SDWORD)psObj->pos.x + xdiff * PULL_BACK_DIST;
*py = (SDWORD)psObj->pos.y + ydiff * PULL_BACK_DIST;
// make sure coordinates stay inside of the map
clip_world_offmap(px, py);
}
// check whether a droid is in the neighboring tile to a build position
bool actionReachedBuildPos(DROID const *psDroid, int x, int y, uint16_t dir, BASE_STATS const *psStats)
{
ASSERT_OR_RETURN(false, psStats != NULL && psDroid != NULL, "Bad stat or droid");
CHECK_DROID(psDroid);
StructureBounds b = getStructureBounds(psStats, Vector2i(x, y), dir);
// do all calculations in half tile units so that
// the droid moves to within half a tile of the target
// NOT ANY MORE - JOHN
Vector2i delta = map_coord(removeZ(psDroid->pos)) - b.map;
return delta.x >= -1 && delta.x <= b.size.x && delta.y >= -1 && delta.y <= b.size.y;
}
// check if a droid is on the foundations of a new building
static bool actionRemoveDroidsFromBuildPos(unsigned player, Vector2i pos, uint16_t dir, BASE_STATS *psStats)
{
ASSERT_OR_RETURN(false, psStats != NULL, "Bad stat");
bool buildPosEmpty = true;
StructureBounds b = getStructureBounds(psStats, pos, dir);
Vector2i structureCentre = world_coord(b.map) + world_coord(b.size)/2;
unsigned structureMaxRadius = iHypot(world_coord(b.size)/2) + 1; // +1 since iHypot rounds down.
gridStartIterate(structureCentre.x, structureCentre.y, structureMaxRadius);
BASE_OBJECT *psObj;
for (psObj = gridIterate(); psObj != NULL; psObj = gridIterate())
{
DROID *droid = castDroid(psObj);
if (droid == NULL)
{
continue; // Only looking for droids.
}
Vector2i delta = map_coord(removeZ(droid->pos)) - b.map;
if (delta.x < 0 || delta.x >= b.size.x || delta.y < 0 || delta.y >= b.size.y || isFlying(droid))
{
continue; // Droid not under new structure (just near it).
}
buildPosEmpty = false; // Found a droid, have to move it away.
if (!aiCheckAlliances(player, droid->player))
{
continue; // Enemy droids probably don't feel like moving.
}
// TODO If the action code was less convoluted, it would be possible for the droid should drive away instead of just getting moved away.
Vector2i bestDest(0, 0); // Dummy initialisation.
unsigned bestDist = UINT32_MAX;
for (int y = -1; y <= b.size.y; ++y)
for (int x = -1; x <= b.size.x; x += y >= 0 && y < b.size.y? b.size.x + 1 : 1)
{
Vector2i dest = world_coord(b.map + Vector2i(x, y)) + Vector2i(TILE_UNITS, TILE_UNITS)/2;
unsigned dist = iHypot(removeZ(droid->pos) - dest);
if (dist < bestDist && !fpathBlockingTile(map_coord(dest.x), map_coord(dest.y), getPropulsionStats(droid)->propulsionType))
{
bestDest = dest;
bestDist = dist;
}
}
if (bestDist != UINT32_MAX)
{
// Push the droid out of the way.
Vector2i newPos = removeZ(droid->pos) + iSinCosR(iAtan2(bestDest - removeZ(droid->pos)), gameTimeAdjustedIncrement(TILE_UNITS));
droidSetPosition(droid, newPos.x, newPos.y);
}
}
return buildPosEmpty;
}
void actionSanity(DROID *psDroid)
{
// Don't waste ammo unless given a direct attack order.
bool avoidOverkill = psDroid->order.type != DORDER_ATTACK && psDroid->order.type != DORDER_ATTACK &&
(psDroid->action == DACTION_ATTACK || psDroid->action == DACTION_MOVEFIRE || psDroid->action == DACTION_MOVETOATTACK ||
psDroid->action == DACTION_ROTATETOATTACK || psDroid->action == DACTION_VTOLATTACK);
// clear the target if it has died
for (int i = 0; i < DROID_MAXWEAPS; i++)
{
if (psDroid->psActionTarget[i] && (avoidOverkill? aiObjectIsProbablyDoomed(psDroid->psActionTarget[i]) : psDroid->psActionTarget[i]->died))
{
setDroidActionTarget(psDroid, NULL, i);
if (i == 0)
{
if (psDroid->action != DACTION_MOVEFIRE &&
psDroid->action != DACTION_TRANSPORTIN &&
psDroid->action != DACTION_TRANSPORTOUT)
{
psDroid->action = DACTION_NONE;
// if VTOL - return to rearm pad if not patrolling
if (isVtolDroid(psDroid))
{
if ((psDroid->order.type == DORDER_PATROL || psDroid->order.type == DORDER_CIRCLE) && !vtolEmpty(psDroid))
{
// Back to the patrol.
actionDroid(psDroid, DACTION_MOVE, psDroid->order.pos.x, psDroid->order.pos.y);
}
else
{
moveToRearm(psDroid);
}
}
}
}
}
}
}
// Update the action state for a droid
void actionUpdateDroid(DROID *psDroid)
{
BASE_OBJECT *psTarget;
PROPULSION_STATS *psPropStats;
bool (*actionUpdateFunc)(DROID *psDroid) = NULL;
unsigned i;
//this is a bit field
bool nonNullWeapon[DROID_MAXWEAPS] = { false };
BASE_OBJECT *psTargets[DROID_MAXWEAPS];
bool hasVisibleTarget = false;
bool targetVisibile[DROID_MAXWEAPS] = { false };
bool bHasTarget;
CHECK_DROID(psDroid);
psPropStats = asPropulsionStats + psDroid->asBits[COMP_PROPULSION].nStat;
ASSERT_OR_RETURN(, psPropStats != NULL, "Invalid propulsion stats pointer");
actionSanity(psDroid);
//if the droid has been attacked by an EMP weapon, it is temporarily disabled
if (psDroid->lastHitWeapon == WSC_EMP)
{
if (gameTime - psDroid->timeLastHit > EMP_DISABLE_TIME)
{
//the actionStarted time needs to be adjusted
psDroid->actionStarted += (gameTime - psDroid->timeLastHit);
//reset the lastHit parameters
psDroid->timeLastHit = 0;
psDroid->lastHitWeapon = WSC_NUM_WEAPON_SUBCLASSES;
}
else
{
//get out without updating
return;
}
}
for (i = 0; i < psDroid->numWeaps; ++i)
{
if (psDroid->asWeaps[i].nStat > 0)
{
nonNullWeapon[i] = true;
}
}
// HACK: Apparently we can't deal with a droid that only has NULL weapons ?
// FIXME: Find out whether this is really necessary
if (psDroid->numWeaps <= 1)
nonNullWeapon[0] = true;
DROID_ORDER_DATA *order = &psDroid->order;
psTarget = order->psObj;
switch (psDroid->action)
{
case DACTION_NONE:
case DACTION_WAITFORREPAIR:
// doing nothing
// see if there's anything to shoot.
if (psDroid->numWeaps > 0 && !isVtolDroid(psDroid)
&& (order->type == DORDER_NONE || order->type == DORDER_TEMP_HOLD || order->type == DORDER_RTR))
{
for (i = 0;i < psDroid->numWeaps;i++)
{
if (nonNullWeapon[i])
{
BASE_OBJECT *psTemp = NULL;
WEAPON_STATS* const psWeapStats = &asWeaponStats[psDroid->asWeaps[i].nStat];
if (psDroid->asWeaps[i].nStat > 0
&& psWeapStats->rotate
&& aiBestNearestTarget(psDroid, &psTemp, i) >= 0)
{
if (secondaryGetState(psDroid, DSO_ATTACK_LEVEL) == DSS_ALEV_ALWAYS)
{
psDroid->action = DACTION_ATTACK;
setDroidActionTarget(psDroid, psTemp, 0);
}
}
}
}
}
// Still not doing anything? See if we need to self repair.
if ((psDroid->action == DACTION_NONE || psDroid->action == DACTION_WAITFORREPAIR)
&& selfRepairEnabled(psDroid->player))
{
droidSelfRepair(psDroid);
}
break;
case DACTION_WAITDURINGREPAIR:
// Check that repair facility still exists
if (!order->psObj)
{
psDroid->action = DACTION_NONE;
break;
}
// move back to the repair facility if necessary
if (DROID_STOPPED(psDroid) &&
!actionReachedBuildPos(psDroid,
order->psObj->pos.x, order->psObj->pos.y, ((STRUCTURE*)order->psObj)->rot.direction,
((STRUCTURE*)order->psObj)->pStructureType ) )
{
moveDroidToNoFormation(psDroid, order->psObj->pos.x, order->psObj->pos.y);
}
break;
case DACTION_TRANSPORTWAITTOFLYIN:
//if we're moving droids to safety and currently waiting to fly back in, see if time is up
if (psDroid->player == selectedPlayer && getDroidsToSafetyFlag())
{
if ((SDWORD)(mission.ETA - (gameTime - missionGetReinforcementTime())) <= 0)
{
UDWORD droidX, droidY;
if (!droidRemove(psDroid, mission.apsDroidLists))
{
ASSERT_OR_RETURN( , false, "Unable to remove transporter from mission list" );
}
addDroid(psDroid, apsDroidLists);
//set the x/y up since they were set to INVALID_XY when moved offWorld
missionGetTransporterExit(selectedPlayer, &droidX, &droidY);
psDroid->pos.x = droidX;
psDroid->pos.y = droidY;
//fly Transporter back to get some more droids
orderDroidLoc( psDroid, DORDER_TRANSPORTIN,
getLandingX(selectedPlayer), getLandingY(selectedPlayer), ModeImmediate);
}
else
{
/*if we're currently moving units to safety and waiting to fly
back in - check there is something to fly back for!*/
if (!missionDroidsRemaining(selectedPlayer))
{
//the script can call startMission for this callback for offworld missions
eventFireCallbackTrigger((TRIGGER_TYPE)CALL_START_NEXT_LEVEL);
triggerEvent(TRIGGER_START_LEVEL);
}
}
}
break;
case DACTION_MOVE:
case DACTION_RETURNTOPOS:
case DACTION_FIRESUPPORT_RETREAT:
// moving to a location
if (DROID_STOPPED(psDroid))
{
bool notify = psDroid->action == DACTION_MOVE;
// Got to destination
psDroid->action = DACTION_NONE;
if (notify)
{
/* notify scripts we have reached the destination
* also triggers when patrolling and reached a waypoint
*/
psScrCBOrder = order->type;
psScrCBOrderDroid = psDroid;
eventFireCallbackTrigger((TRIGGER_TYPE)CALL_DROID_REACH_LOCATION);
psScrCBOrderDroid = NULL;
psScrCBOrder = DORDER_NONE;
triggerEventDroidIdle(psDroid);
}
}
//added multiple weapon check
else if (psDroid->numWeaps > 0)
{
for(i = 0;i < psDroid->numWeaps;i++)
{
if (nonNullWeapon[i])
{
BASE_OBJECT *psTemp = NULL;
//I moved psWeapStats flag update there
WEAPON_STATS* const psWeapStats = &asWeaponStats[psDroid->asWeaps[i].nStat];
if (!isVtolDroid(psDroid)
&& psDroid->asWeaps[i].nStat > 0
&& psWeapStats->rotate
&& psWeapStats->fireOnMove != FOM_NO
&& aiBestNearestTarget(psDroid, &psTemp, i) >= 0)
{
if (secondaryGetState(psDroid, DSO_ATTACK_LEVEL) == DSS_ALEV_ALWAYS)
{
psDroid->action = DACTION_MOVEFIRE;
setDroidActionTarget(psDroid, psTemp, i);
}
}
}
}
}
break;
case DACTION_TRANSPORTIN:
case DACTION_TRANSPORTOUT:
actionUpdateTransporter( psDroid );
break;
case DACTION_MOVEFIRE:
// check if vtol is armed
if (vtolEmpty(psDroid))
{
moveToRearm(psDroid);
}
// If droid stopped, it can no longer be in DACTION_MOVEFIRE
if (DROID_STOPPED(psDroid))
{
psDroid->action = DACTION_NONE;
break;
}
// loop through weapons and look for target for each weapon
bHasTarget = false;
for (i = 0; i < psDroid->numWeaps; ++i)
{
// Does this weapon have a target?
if (psDroid->psActionTarget[i] != NULL)
{
// Is target worth shooting yet?
if (aiObjectIsProbablyDoomed(psDroid->psActionTarget[i]))
{
setDroidActionTarget(psDroid, NULL, i);
}
// Is target from our team now? (Electronic Warfare)
else if (electronicDroid(psDroid) && psDroid->player == psDroid->psActionTarget[i]->player)
{
setDroidActionTarget(psDroid, NULL, i);
}
// I have a target!
else
{
bHasTarget = true;
}
}
// This weapon doesn't have a target
else
{
// Can we find a good target for the weapon?
BASE_OBJECT *psTemp;
if (aiBestNearestTarget(psDroid, &psTemp, i) >= 0) // assuming aiBestNearestTarget checks for electronic warfare
{
bHasTarget = true;
setDroidActionTarget(psDroid, psTemp, i); // this updates psDroid->psActionTarget[i] to != NULL
}
}
// If we have a target for the weapon: is it visible?
if (psDroid->psActionTarget[i] != NULL
&& visibleObject(psDroid, psDroid->psActionTarget[i], false))
{
hasVisibleTarget = true; // droid have a visible target to shoot
targetVisibile[i] = true;// it is at least visible for this weapon
}
}
// if there is at least one target
if (bHasTarget)
{
// loop through weapons
for (i = 0; i < psDroid->numWeaps; ++i)
{