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OpenFusion/src/MobAI.cpp

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#include "MobAI.hpp"
#include "Player.hpp"
#include "Racing.hpp"
#include "Transport.hpp"
#include "Nanos.hpp"
#include "Combat.hpp"
#include "Abilities.hpp"
#include "Rand.hpp"
#include <cmath>
#include <limits.h>
using namespace MobAI;
bool MobAI::simulateMobs = settings::SIMULATEMOBS;
static void roamingStep(Mob *mob, time_t currTime);
/*
* Dynamic lerp; distinct from Transport::lerp(). This one doesn't care about height and
* only returns the first step, since the rest will need to be recalculated anyway if chasing player.
*/
static std::pair<int,int> lerp(int x1, int y1, int x2, int y2, int speed) {
std::pair<int,int> ret = {x1, y1};
if (speed == 0)
return ret;
int distance = hypot(x1 - x2, y1 - y2);
if (distance > speed) {
int lerps = distance / speed;
// interpolate only the first point
float frac = 1.0f / lerps;
ret.first = (x1 + (x2 - x1) * frac);
ret.second = (y1 + (y2 - y1) * frac);
} else {
ret.first = x2;
ret.second = y2;
}
return ret;
}
void MobAI::clearDebuff(Mob *mob) {
mob->skillStyle = -1;
mob->appearanceData.iConditionBitFlag = 0;
mob->unbuffTimes.clear();
INITSTRUCT(sP_FE2CL_CHAR_TIME_BUFF_TIME_OUT, pkt1);
pkt1.eCT = 2;
pkt1.iID = mob->appearanceData.iNPC_ID;
pkt1.iConditionBitFlag = mob->appearanceData.iConditionBitFlag;
NPCManager::sendToViewable(mob, &pkt1, P_FE2CL_CHAR_TIME_BUFF_TIME_OUT, sizeof(sP_FE2CL_CHAR_TIME_BUFF_TIME_OUT));
}
void MobAI::followToCombat(Mob *mob) {
if (NPCManager::NPCs.find(mob->groupLeader) != NPCManager::NPCs.end() && NPCManager::NPCs[mob->groupLeader]->type == EntityType::MOB) {
Mob* leadMob = (Mob*)NPCManager::NPCs[mob->groupLeader];
for (int i = 0; i < 4; i++) {
if (leadMob->groupMember[i] == 0)
break;
if (NPCManager::NPCs.find(leadMob->groupMember[i]) == NPCManager::NPCs.end() || NPCManager::NPCs[leadMob->groupMember[i]]->type != EntityType::MOB) {
std::cout << "[WARN] roamingStep: leader can't find a group member!" << std::endl;
continue;
}
Mob* followerMob = (Mob*)NPCManager::NPCs[leadMob->groupMember[i]];
if (followerMob->state != MobState::ROAMING) // only roaming mobs should transition to combat
continue;
enterCombat(mob->target, followerMob);
}
if (leadMob->state != MobState::ROAMING)
return;
enterCombat(mob->target, leadMob);
}
}
void MobAI::groupRetreat(Mob *mob) {
if (NPCManager::NPCs.find(mob->groupLeader) == NPCManager::NPCs.end() || NPCManager::NPCs[mob->groupLeader]->type != EntityType::MOB)
return;
Mob* leadMob = (Mob*)NPCManager::NPCs[mob->groupLeader];
for (int i = 0; i < 4; i++) {
if (leadMob->groupMember[i] == 0)
break;
if (NPCManager::NPCs.find(leadMob->groupMember[i]) == NPCManager::NPCs.end() || NPCManager::NPCs[leadMob->groupMember[i]]->type != EntityType::MOB) {
std::cout << "[WARN] roamingStep: leader can't find a group member!" << std::endl;
continue;
}
Mob* followerMob = (Mob*)NPCManager::NPCs[leadMob->groupMember[i]];
followerMob->target = nullptr;
followerMob->state = MobState::RETREAT;
clearDebuff(followerMob);
}
leadMob->target = nullptr;
leadMob->state = MobState::RETREAT;
clearDebuff(leadMob);
}
/*
* Aggro on nearby players.
* Even if they're in range, we can't assume they're all in the same one chunk
* as the mob, since it might be near a chunk boundary.
*/
bool MobAI::aggroCheck(Mob *mob, time_t currTime) {
CNSocket *closest = nullptr;
int closestDistance = INT_MAX;
for (auto it = mob->viewableChunks.begin(); it != mob->viewableChunks.end(); it++) {
Chunk* chunk = *it;
for (const EntityRef& ref : chunk->entities) {
// TODO: support targetting other CombatNPCs
if (ref.type != EntityType::PLAYER)
continue;
CNSocket *s = ref.sock;
Player *plr = PlayerManager::getPlayer(s);
if (plr->HP <= 0)
continue;
int mobRange = mob->sightRange;
if (plr->iConditionBitFlag & CSB_BIT_UP_STEALTH
|| Racing::EPRaces.find(s) != Racing::EPRaces.end())
mobRange /= 3;
// 0.33x - 1.66x the range
int levelDifference = plr->level - mob->level;
if (levelDifference > -10)
mobRange = levelDifference < 10 ? mobRange - (levelDifference * mobRange / 15) : mobRange / 3;
if (mob->state != MobState::ROAMING && plr->inCombat) // freshly out of aggro mobs
mobRange = mob->sightRange * 2; // should not be impacted by the above
if (plr->iSpecialState & (CN_SPECIAL_STATE_FLAG__INVISIBLE|CN_SPECIAL_STATE_FLAG__INVULNERABLE))
mobRange = -1;
// height is relevant for aggro distance because of platforming
int xyDistance = hypot(mob->x - plr->x, mob->y - plr->y);
int distance = hypot(xyDistance, (mob->z - plr->z) * 2); // difference in Z counts twice
if (distance > mobRange || distance > closestDistance)
continue;
// found a player
closest = s;
closestDistance = distance;
}
}
if (closest != nullptr) {
// found closest player. engage.
enterCombat(closest, mob);
if (mob->groupLeader != 0)
followToCombat(mob);
return true;
}
return false;
}
static void dealCorruption(Mob *mob, std::vector<int> targetData, int skillID, int style) {
Player *plr = PlayerManager::getPlayer(mob->target);
size_t resplen = sizeof(sP_FE2CL_NPC_SKILL_CORRUPTION_HIT) + targetData[0] * sizeof(sCAttackResult);
// validate response packet
if (!validOutVarPacket(sizeof(sP_FE2CL_NPC_SKILL_CORRUPTION_HIT), targetData[0], sizeof(sCAttackResult))) {
std::cout << "[WARN] bad sP_FE2CL_NPC_SKILL_CORRUPTION_HIT packet size" << std::endl;
return;
}
uint8_t respbuf[CN_PACKET_BUFFER_SIZE];
memset(respbuf, 0, resplen);
sP_FE2CL_NPC_SKILL_CORRUPTION_HIT *resp = (sP_FE2CL_NPC_SKILL_CORRUPTION_HIT*)respbuf;
sCAttackResult *respdata = (sCAttackResult*)(respbuf+sizeof(sP_FE2CL_NPC_SKILL_CORRUPTION_HIT));
resp->iNPC_ID = mob->appearanceData.iNPC_ID;
resp->iSkillID = skillID;
resp->iStyle = style;
resp->iValue1 = plr->x;
resp->iValue2 = plr->y;
resp->iValue3 = plr->z;
resp->iTargetCnt = targetData[0];
for (int i = 0; i < targetData[0]; i++) {
CNSocket *sock = nullptr;
Player *plr = nullptr;
for (auto& pair : PlayerManager::players) {
if (pair.second->iID == targetData[i+1]) {
sock = pair.first;
plr = pair.second;
break;
}
}
// player not found
if (plr == nullptr) {
std::cout << "[WARN] dealCorruption: player ID not found" << std::endl;
return;
}
respdata[i].eCT = 1;
respdata[i].iID = plr->iID;
respdata[i].bProtected = 0;
respdata[i].iActiveNanoSlotNum = -1;
for (int n = 0; n < 3; n++)
if (plr->activeNano == plr->equippedNanos[n])
respdata[i].iActiveNanoSlotNum = n;
respdata[i].iNanoID = plr->activeNano;
int style2 = Nanos::nanoStyle(plr->activeNano);
if (style2 == -1) { // no nano
respdata[i].iHitFlag = 8;
respdata[i].iDamage = Nanos::SkillTable[skillID].powerIntensity[0] * PC_MAXHEALTH((int)mob->data["m_iNpcLevel"]) / 1500;
} else if (style == style2) {
respdata[i].iHitFlag = 8; // tie
respdata[i].iDamage = 0;
respdata[i].iNanoStamina = plr->Nanos[plr->activeNano].iStamina;
} else if (style - style2 == 1 || style2 - style == 2) {
respdata[i].iHitFlag = 4; // win
respdata[i].iDamage = 0;
respdata[i].iNanoStamina = plr->Nanos[plr->activeNano].iStamina += 45;
if (plr->Nanos[plr->activeNano].iStamina > 150)
respdata[i].iNanoStamina = plr->Nanos[plr->activeNano].iStamina = 150;
// fire damage power disguised as a corruption attack back at the enemy
std::vector<int> targetData2 = {1, mob->appearanceData.iNPC_ID, 0, 0, 0};
for (auto& pwr : Nanos::NanoPowers)
if (pwr.skillType == EST_DAMAGE)
pwr.handle(sock, targetData2, plr->activeNano, skillID, 0, 200);
} else {
respdata[i].iHitFlag = 16; // lose
respdata[i].iDamage = Nanos::SkillTable[skillID].powerIntensity[0] * PC_MAXHEALTH((int)mob->data["m_iNpcLevel"]) / 1500;
respdata[i].iNanoStamina = plr->Nanos[plr->activeNano].iStamina -= 90;
if (plr->Nanos[plr->activeNano].iStamina < 0) {
respdata[i].bNanoDeactive = 1;
respdata[i].iNanoStamina = plr->Nanos[plr->activeNano].iStamina = 0;
}
}
if (!(plr->iSpecialState & CN_SPECIAL_STATE_FLAG__INVULNERABLE))
plr->HP -= respdata[i].iDamage;
respdata[i].iHP = plr->HP;
respdata[i].iConditionBitFlag = plr->iConditionBitFlag;
if (plr->HP <= 0) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
if (!aggroCheck(mob, getTime())) {
clearDebuff(mob);
if (mob->groupLeader != 0)
groupRetreat(mob);
}
}
}
NPCManager::sendToViewable(mob, (void*)&respbuf, P_FE2CL_NPC_SKILL_CORRUPTION_HIT, resplen);
}
static void useAbilities(Mob *mob, time_t currTime) {
/*
* targetData approach
* first integer is the count
* second to fifth integers are IDs, these can be either player iID or mob's iID
* whether the skill targets players or mobs is determined by the skill packet being fired
*/
Player *plr = PlayerManager::getPlayer(mob->target);
if (mob->skillStyle >= 0) { // corruption hit
int skillID = (int)mob->data["m_iCorruptionType"];
std::vector<int> targetData = {1, plr->iID, 0, 0, 0};
int temp = mob->skillStyle;
mob->skillStyle = -3; // corruption cooldown
mob->nextAttack = currTime + 1000;
dealCorruption(mob, targetData, skillID, temp);
return;
}
if (mob->skillStyle == -2) { // eruption hit
int skillID = (int)mob->data["m_iMegaType"];
std::vector<int> targetData = {0, 0, 0, 0, 0};
// find the players within range of eruption
for (auto it = mob->viewableChunks.begin(); it != mob->viewableChunks.end(); it++) {
Chunk* chunk = *it;
for (const EntityRef& ref : chunk->entities) {
// TODO: see aggroCheck()
if (ref.type != EntityType::PLAYER)
continue;
CNSocket *s= ref.sock;
Player *plr = PlayerManager::getPlayer(s);
if (plr->HP <= 0)
continue;
int distance = hypot(mob->hitX - plr->x, mob->hitY - plr->y);
if (distance < Nanos::SkillTable[skillID].effectArea) {
targetData[0] += 1;
targetData[targetData[0]] = plr->iID;
if (targetData[0] > 3) // make sure not to have more than 4
break;
}
}
}
for (auto& pwr : Combat::MobPowers)
if (pwr.skillType == Nanos::SkillTable[skillID].skillType)
pwr.handle(mob, targetData, skillID, Nanos::SkillTable[skillID].durationTime[0], Nanos::SkillTable[skillID].powerIntensity[0]);
mob->skillStyle = -3; // eruption cooldown
mob->nextAttack = currTime + 1000;
return;
}
if (mob->skillStyle == -3) { // cooldown expires
mob->skillStyle = -1;
return;
}
int random = Rand::rand(2000) * 1000;
int prob1 = (int)mob->data["m_iActiveSkill1Prob"]; // active skill probability
int prob2 = (int)mob->data["m_iCorruptionTypeProb"]; // corruption probability
int prob3 = (int)mob->data["m_iMegaTypeProb"]; // eruption probability
if (random < prob1) { // active skill hit
int skillID = (int)mob->data["m_iActiveSkill1"];
std::vector<int> targetData = {1, plr->iID, 0, 0, 0};
for (auto& pwr : Combat::MobPowers)
if (pwr.skillType == Nanos::SkillTable[skillID].skillType) {
if (pwr.bitFlag != 0 && (plr->iConditionBitFlag & pwr.bitFlag))
return; // prevent debuffing a player twice
pwr.handle(mob, targetData, skillID, Nanos::SkillTable[skillID].durationTime[0], Nanos::SkillTable[skillID].powerIntensity[0]);
}
mob->nextAttack = currTime + (int)mob->data["m_iDelayTime"] * 100;
return;
}
if (random < prob1 + prob2) { // corruption windup
int skillID = (int)mob->data["m_iCorruptionType"];
INITSTRUCT(sP_FE2CL_NPC_SKILL_CORRUPTION_READY, pkt);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSkillID = skillID;
pkt.iValue1 = plr->x;
pkt.iValue2 = plr->y;
pkt.iValue3 = plr->z;
mob->skillStyle = Nanos::nanoStyle(plr->activeNano) - 1;
if (mob->skillStyle == -1)
mob->skillStyle = 2;
if (mob->skillStyle == -2)
mob->skillStyle = Rand::rand(3);
pkt.iStyle = mob->skillStyle;
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_SKILL_CORRUPTION_READY, sizeof(sP_FE2CL_NPC_SKILL_CORRUPTION_READY));
mob->nextAttack = currTime + 1800;
return;
}
if (random < prob1 + prob2 + prob3) { // eruption windup
int skillID = (int)mob->data["m_iMegaType"];
INITSTRUCT(sP_FE2CL_NPC_SKILL_READY, pkt);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSkillID = skillID;
pkt.iValue1 = mob->hitX = plr->x;
pkt.iValue2 = mob->hitY = plr->y;
pkt.iValue3 = mob->hitZ = plr->z;
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_SKILL_READY, sizeof(sP_FE2CL_NPC_SKILL_READY));
mob->nextAttack = currTime + 1800;
mob->skillStyle = -2;
return;
}
return;
}
void MobAI::enterCombat(CNSocket *sock, Mob *mob) {
mob->target = sock;
mob->state = MobState::COMBAT;
mob->nextMovement = getTime();
mob->nextAttack = 0;
mob->roamX = mob->x;
mob->roamY = mob->y;
mob->roamZ = mob->z;
int skillID = (int)mob->data["m_iPassiveBuff"]; // cast passive
std::vector<int> targetData = {1, mob->appearanceData.iNPC_ID, 0, 0, 0};
for (auto& pwr : Combat::MobPowers)
if (pwr.skillType == Nanos::SkillTable[skillID].skillType)
pwr.handle(mob, targetData, skillID, Nanos::SkillTable[skillID].durationTime[0], Nanos::SkillTable[skillID].powerIntensity[0]);
for (NPCEvent& event : NPCManager::NPCEvents) // trigger an ON_COMBAT
if (event.trigger == ON_COMBAT && event.npcType == mob->appearanceData.iNPCType)
event.handler(sock, mob);
}
static void drainMobHP(Mob *mob, int amount) {
size_t resplen = sizeof(sP_FE2CL_CHAR_TIME_BUFF_TIME_TICK) + sizeof(sSkillResult_Damage);
assert(resplen < CN_PACKET_BUFFER_SIZE - 8);
uint8_t respbuf[CN_PACKET_BUFFER_SIZE];
memset(respbuf, 0, resplen);
sP_FE2CL_CHAR_TIME_BUFF_TIME_TICK *pkt = (sP_FE2CL_CHAR_TIME_BUFF_TIME_TICK*)respbuf;
sSkillResult_Damage *drain = (sSkillResult_Damage*)(respbuf + sizeof(sP_FE2CL_CHAR_TIME_BUFF_TIME_TICK));
pkt->iID = mob->appearanceData.iNPC_ID;
pkt->eCT = 4; // mob
pkt->iTB_ID = ECSB_BOUNDINGBALL;
drain->eCT = 4;
drain->iID = mob->appearanceData.iNPC_ID;
drain->iDamage = amount;
drain->iHP = mob->appearanceData.iHP -= amount;
NPCManager::sendToViewable(mob, (void*)&respbuf, P_FE2CL_CHAR_TIME_BUFF_TIME_TICK, resplen);
if (mob->appearanceData.iHP <= 0)
Combat::killMob(mob->target, mob);
}
static void deadStep(Mob *mob, time_t currTime) {
// despawn the mob after a short delay
if (mob->killedTime != 0 && !mob->despawned && currTime - mob->killedTime > 2000) {
mob->despawned = true;
INITSTRUCT(sP_FE2CL_NPC_EXIT, pkt);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_EXIT, sizeof(sP_FE2CL_NPC_EXIT));
// if it was summoned, mark it for removal
if (mob->summoned) {
std::cout << "[INFO] Queueing killed summoned mob for removal" << std::endl;
NPCManager::queueNPCRemoval(mob->appearanceData.iNPC_ID);
return;
}
// pre-set spawn coordinates if not marked for removal
mob->x = mob->spawnX;
mob->y = mob->spawnY;
mob->z = mob->spawnZ;
}
// to guide their groupmates, group leaders still need to move despite being dead
if (mob->groupLeader == mob->appearanceData.iNPC_ID)
roamingStep(mob, currTime);
if (mob->killedTime != 0 && currTime - mob->killedTime < mob->regenTime * 100)
return;
std::cout << "respawning mob " << mob->appearanceData.iNPC_ID << " with HP = " << mob->maxHealth << std::endl;
mob->appearanceData.iHP = mob->maxHealth;
mob->state = MobState::ROAMING;
// if mob is a group leader/follower, spawn where the group is.
if (mob->groupLeader != 0) {
if (NPCManager::NPCs.find(mob->groupLeader) != NPCManager::NPCs.end() && NPCManager::NPCs[mob->groupLeader]->type == EntityType::MOB) {
Mob* leaderMob = (Mob*)NPCManager::NPCs[mob->groupLeader];
mob->x = leaderMob->x + mob->offsetX;
mob->y = leaderMob->y + mob->offsetY;
mob->z = leaderMob->z;
} else {
std::cout << "[WARN] deadStep: mob cannot find it's leader!" << std::endl;
}
}
INITSTRUCT(sP_FE2CL_NPC_NEW, pkt);
pkt.NPCAppearanceData = mob->appearanceData;
pkt.NPCAppearanceData.iX = mob->x;
pkt.NPCAppearanceData.iY = mob->y;
pkt.NPCAppearanceData.iZ = mob->z;
// notify all nearby players
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_NEW, sizeof(sP_FE2CL_NPC_NEW));
}
static void combatStep(Mob *mob, time_t currTime) {
assert(mob->target != nullptr);
// lose aggro if the player lost connection
if (PlayerManager::players.find(mob->target) == PlayerManager::players.end()) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
if (!aggroCheck(mob, currTime)) {
clearDebuff(mob);
if (mob->groupLeader != 0)
groupRetreat(mob);
}
return;
}
Player *plr = PlayerManager::getPlayer(mob->target);
// lose aggro if the player became invulnerable or died
if (plr->HP <= 0
|| (plr->iSpecialState & CN_SPECIAL_STATE_FLAG__INVULNERABLE)) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
if (!aggroCheck(mob, currTime)) {
clearDebuff(mob);
if (mob->groupLeader != 0)
groupRetreat(mob);
}
return;
}
// drain
if (mob->skillStyle < 0 && (mob->lastDrainTime == 0 || currTime - mob->lastDrainTime >= 1000)
&& mob->appearanceData.iConditionBitFlag & CSB_BIT_BOUNDINGBALL) {
drainMobHP(mob, mob->maxHealth / 20); // lose 5% every second
mob->lastDrainTime = currTime;
}
// if drain killed the mob, return early
if (mob->appearanceData.iHP <= 0)
return;
// unbuffing
std::unordered_map<int32_t, time_t>::iterator it = mob->unbuffTimes.begin();
while (it != mob->unbuffTimes.end()) {
if (currTime >= it->second) {
mob->appearanceData.iConditionBitFlag &= ~it->first;
INITSTRUCT(sP_FE2CL_CHAR_TIME_BUFF_TIME_OUT, pkt1);
pkt1.eCT = 2;
pkt1.iID = mob->appearanceData.iNPC_ID;
pkt1.iConditionBitFlag = mob->appearanceData.iConditionBitFlag;
NPCManager::sendToViewable(mob, &pkt1, P_FE2CL_CHAR_TIME_BUFF_TIME_OUT, sizeof(sP_FE2CL_CHAR_TIME_BUFF_TIME_OUT));
it = mob->unbuffTimes.erase(it);
} else {
it++;
}
}
// skip attack if stunned or asleep
if (mob->appearanceData.iConditionBitFlag & (CSB_BIT_STUN|CSB_BIT_MEZ)) {
mob->skillStyle = -1; // in this case we also reset the any outlying abilities the mob might be winding up.
return;
}
int distance = hypot(plr->x - mob->x, plr->y - mob->y);
int mobRange = (int)mob->data["m_iAtkRange"] + (int)mob->data["m_iRadius"];
if (currTime >= mob->nextAttack) {
if (mob->skillStyle != -1 || distance <= mobRange || Rand::rand(20) == 0) // while not in attack range, 1 / 20 chance.
useAbilities(mob, currTime);
if (mob->target == nullptr)
return;
}
int distanceToTravel = INT_MAX;
int speed = mob->data["m_iRunSpeed"];
// movement logic: move when out of range but don't move while casting a skill
if (distance > mobRange && mob->skillStyle == -1) {
if (mob->nextMovement != 0 && currTime < mob->nextMovement)
return;
mob->nextMovement = currTime + 400;
if (currTime >= mob->nextAttack)
mob->nextAttack = 0;
// halve movement speed if snared
if (mob->appearanceData.iConditionBitFlag & CSB_BIT_DN_MOVE_SPEED)
speed /= 2;
int targetX = plr->x;
int targetY = plr->y;
if (mob->groupLeader != 0) {
targetX += mob->offsetX*distance/(mob->idleRange + 1);
targetY += mob->offsetY*distance/(mob->idleRange + 1);
}
distanceToTravel = std::min(distance-mobRange+1, speed*2/5);
auto targ = lerp(mob->x, mob->y, targetX, targetY, distanceToTravel);
if (distanceToTravel < speed*2/5 && currTime >= mob->nextAttack)
mob->nextAttack = 0;
NPCManager::updateNPCPosition(mob->appearanceData.iNPC_ID, targ.first, targ.second, mob->z, mob->instanceID, mob->appearanceData.iAngle);
INITSTRUCT(sP_FE2CL_NPC_MOVE, pkt);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = speed;
pkt.iToX = mob->x = targ.first;
pkt.iToY = mob->y = targ.second;
pkt.iToZ = plr->z;
pkt.iMoveStyle = 1;
// notify all nearby players
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_MOVE, sizeof(sP_FE2CL_NPC_MOVE));
}
/* attack logic
* 2/5 represents 400 ms which is the time interval mobs use per movement logic step
* if the mob is one move interval away, we should just start attacking anyways.
*/
if (distance <= mobRange || distanceToTravel < speed*2/5) {
if (mob->nextAttack == 0 || currTime >= mob->nextAttack) {
mob->nextAttack = currTime + (int)mob->data["m_iDelayTime"] * 100;
Combat::npcAttackPc(mob, currTime);
}
}
// retreat if the player leaves combat range
int xyDistance = hypot(plr->x - mob->roamX, plr->y - mob->roamY);
distance = hypot(xyDistance, plr->z - mob->roamZ);
if (distance >= mob->data["m_iCombatRange"]) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
clearDebuff(mob);
if (mob->groupLeader != 0)
groupRetreat(mob);
}
}
void MobAI::incNextMovement(Mob *mob, time_t currTime) {
if (currTime == 0)
currTime = getTime();
int delay = (int)mob->data["m_iDelayTime"] * 1000;
mob->nextMovement = currTime + delay/2 + Rand::rand(delay/2);
}
static void roamingStep(Mob *mob, time_t currTime) {
/*
* We reuse nextAttack to avoid scanning for players all the time, but to still
* do so more often than if we waited for nextMovement (which is way too slow).
* In the case of group leaders, this step will be called by dead mobs, so disable attack.
*/
if (mob->state != MobState::DEAD && (mob->nextAttack == 0 || currTime >= mob->nextAttack)) {
mob->nextAttack = currTime + 500;
if (aggroCheck(mob, currTime))
return;
}
// no random roaming if the mob already has a set path
if (mob->staticPath)
return;
if (mob->groupLeader != 0 && mob->groupLeader != mob->appearanceData.iNPC_ID) // don't roam by yourself without group leader
return;
/*
* mob->nextMovement is also updated whenever the path queue is traversed in
* Transport::stepNPCPathing() (which ticks at a higher frequency than nextMovement),
* so we don't have to check if there's already entries in the queue since we know there won't be.
*/
if (mob->nextMovement != 0 && currTime < mob->nextMovement)
return;
incNextMovement(mob, currTime);
int xStart = mob->spawnX - mob->idleRange/2;
int yStart = mob->spawnY - mob->idleRange/2;
int speed = mob->data["m_iWalkSpeed"];
// some mobs don't move (and we mustn't divide/modulus by zero)
if (mob->idleRange == 0 || speed == 0)
return;
int farX, farY, distance;
int minDistance = mob->idleRange / 2;
// pick a random destination
farX = xStart + Rand::rand(mob->idleRange);
farY = yStart + Rand::rand(mob->idleRange);
distance = std::abs(std::max(farX - mob->x, farY - mob->y));
if (distance == 0)
distance += 1; // hack to avoid FPE
// if it's too short a walk, go further in that direction
farX = mob->x + (farX - mob->x) * minDistance / distance;
farY = mob->y + (farY - mob->y) * minDistance / distance;
// but don't got out of bounds
farX = std::clamp(farX, xStart, xStart + mob->idleRange);
farY = std::clamp(farY, yStart, yStart + mob->idleRange);
// halve movement speed if snared
if (mob->appearanceData.iConditionBitFlag & CSB_BIT_DN_MOVE_SPEED)
speed /= 2;
std::queue<WarpLocation> queue;
WarpLocation from = { mob->x, mob->y, mob->z };
WarpLocation to = { farX, farY, mob->z };
// add a route to the queue; to be processed in Transport::stepNPCPathing()
Transport::lerp(&queue, from, to, speed);
Transport::NPCQueues[mob->appearanceData.iNPC_ID] = queue;
if (mob->groupLeader != 0 && mob->groupLeader == mob->appearanceData.iNPC_ID) {
// make followers follow this npc.
for (int i = 0; i < 4; i++) {
if (mob->groupMember[i] == 0)
break;
if (NPCManager::NPCs.find(mob->groupMember[i]) == NPCManager::NPCs.end() || NPCManager::NPCs[mob->groupMember[i]]->type != EntityType::MOB) {
std::cout << "[WARN] roamingStep: leader can't find a group member!" << std::endl;
continue;
}
std::queue<WarpLocation> queue2;
Mob* followerMob = (Mob*)NPCManager::NPCs[mob->groupMember[i]];
from = { followerMob->x, followerMob->y, followerMob->z };
to = { farX + followerMob->offsetX, farY + followerMob->offsetY, followerMob->z };
Transport::lerp(&queue2, from, to, speed);
Transport::NPCQueues[followerMob->appearanceData.iNPC_ID] = queue2;
}
}
}
static void retreatStep(Mob *mob, time_t currTime) {
if (mob->nextMovement != 0 && currTime < mob->nextMovement)
return;
mob->nextMovement = currTime + 400;
// distance between spawn point and current location
int distance = hypot(mob->x - mob->roamX, mob->y - mob->roamY);
//if (distance > mob->data["m_iIdleRange"]) {
if (distance > 10) {
INITSTRUCT(sP_FE2CL_NPC_MOVE, pkt);
auto targ = lerp(mob->x, mob->y, mob->roamX, mob->roamY, (int)mob->data["m_iRunSpeed"]*4/5);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = (int)mob->data["m_iRunSpeed"] * 2;
pkt.iToX = mob->x = targ.first;
pkt.iToY = mob->y = targ.second;
pkt.iToZ = mob->z = mob->spawnZ;
pkt.iMoveStyle = 1;
// notify all nearby players
NPCManager::sendToViewable(mob, &pkt, P_FE2CL_NPC_MOVE, sizeof(sP_FE2CL_NPC_MOVE));
}
// if we got there
//if (distance <= mob->data["m_iIdleRange"]) {
if (distance <= 10) { // retreat back to the spawn point
mob->state = MobState::ROAMING;
mob->appearanceData.iHP = mob->maxHealth;
mob->killedTime = 0;
mob->nextAttack = 0;
mob->appearanceData.iConditionBitFlag = 0;
// cast a return home heal spell, this is the right way(tm)
std::vector<int> targetData = {1, 0, 0, 0, 0};
for (auto& pwr : Combat::MobPowers)
if (pwr.skillType == Nanos::SkillTable[110].skillType)
pwr.handle(mob, targetData, 110, Nanos::SkillTable[110].durationTime[0], Nanos::SkillTable[110].powerIntensity[0]);
// clear outlying debuffs
clearDebuff(mob);
}
}
void MobAI::step(CombatNPC *npc, time_t currTime) {
assert(npc->type == EntityType::MOB);
auto mob = (Mob*)npc;
if (mob->playersInView < 0)
std::cout << "[WARN] Weird playerview value " << mob->playersInView << std::endl;
// skip mob movement and combat if disabled or not in view
if ((!simulateMobs || mob->playersInView == 0) && mob->state != MobState::DEAD
&& mob->state != MobState::RETREAT)
return;
switch (mob->state) {
case MobState::INACTIVE:
// no-op
break;
case MobState::ROAMING:
roamingStep(mob, currTime);
break;
case MobState::COMBAT:
combatStep(mob, currTime);
break;
case MobState::RETREAT:
retreatStep(mob, currTime);
break;
case MobState::DEAD:
deadStep(mob, currTime);
break;
}
}
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