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Lerp mob movement a little.

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We'll lerp a little harder later. Also retreat if kited
too far.
This commit is contained in:
dongresource 2020-09-24 22:55:33 +02:00
parent 1f18104a6f
commit cfb3d25bc5
2 changed files with 80 additions and 32 deletions
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109
src/MobManager.cpp
View File

@ -73,7 +73,7 @@ void MobManager::pcAttackNpcs(CNSocket *sock, CNPacketData *data) {
mob->target = sock;
mob->state = MobState::COMBAT;
mob->nextMovement = getTime();
std::cout << "combat state\n";
//std::cout << "combat state\n";
}
mob->appearanceData.iHP -= 100;
@ -131,7 +131,7 @@ void MobManager::npcAttackPc(Mob *mob) {
if (plr->HP <= 0) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
std::cout << "retreat state\n";
//std::cout << "retreat state\n";
}
}
@ -190,7 +190,7 @@ void MobManager::killMob(CNSocket *sock, Mob *mob) {
mob->appearanceData.iConditionBitFlag = 0;
mob->killedTime = getTime(); // XXX: maybe introduce a shard-global time for each step?
std::cout << "dead state mob " << mob->appearanceData.iNPC_ID << std::endl;
//std::cout << "dead state mob " << mob->appearanceData.iNPC_ID << std::endl;
giveReward(sock);
MissionManager::mobKilled(sock, mob->appearanceData.iNPCType);
@ -224,7 +224,7 @@ void MobManager::deadStep(Mob *mob, time_t currTime) {
mob->appearanceData.iHP = mob->maxHealth;
mob->state = MobState::ROAMING;
std::cout << "roaming state\n";
//std::cout << "roaming state\n";
INITSTRUCT(sP_FE2CL_NPC_NEW, pkt);
@ -245,7 +245,7 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
if (PlayerManager::players.find(mob->target) == PlayerManager::players.end()) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
std::cout << "RETREAT state\n";
//std::cout << "RETREAT state\n";
return;
}
Player *plr = PlayerManager::getPlayer(mob->target);
@ -261,7 +261,7 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
* No, I'm not 100% sure this is how it's supposed to work.
*/
if (distance <= (int)mob->data["m_iAtkRange"]) {
std::cout << "attack logic\n";
//std::cout << "attack logic\n";
// attack logic
if (mob->nextAttack == 0) {
mob->nextAttack = currTime + (int)mob->data["m_iInitalTime"] * 100; // I *think* this is what this is
@ -271,20 +271,28 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
npcAttackPc(mob);
}
} else {
std::cout << "movement logic\n";
std::cout << "distance: " << distance << " attack range: " << mob->data["m_iAtkRange"] << std::endl;
//std::cout << "movement logic\n";
//std::cout << "distance: " << distance << " attack range: " << mob->data["m_iAtkRange"] << std::endl;
// movement logic
if (mob->nextMovement != 0 && currTime < mob->nextMovement)
return;
mob->nextMovement = currTime + (int)mob->data["m_iDelayTime"] * 100;
int speed = mob->data["m_iRunSpeed"];
// halve movement speed if snared
if (mob->appearanceData.iConditionBitFlag & CSB_BIT_DN_MOVE_SPEED)
speed /= 2;
auto targ = lerp(mob->appearanceData.iX, mob->appearanceData.iY, mob->target->plr->x, mob->target->plr->y, speed);
INITSTRUCT(sP_FE2CL_NPC_MOVE, pkt);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = mob->data["m_iWalkSpeed"];
pkt.iToX = mob->appearanceData.iX = mob->target->plr->x; // FIXME: lerping
pkt.iToY = mob->appearanceData.iY = mob->target->plr->y;
pkt.iToZ = mob->appearanceData.iZ = mob->target->plr->z;
pkt.iSpeed = speed;
pkt.iToX = mob->appearanceData.iX = targ.first;
pkt.iToY = mob->appearanceData.iY = targ.second;
pkt.iToZ = mob->appearanceData.iZ;
auto chunk = ChunkManager::grabChunk(mob->appearanceData.iX, mob->appearanceData.iY);
auto chunks = ChunkManager::grabChunks(chunk);
@ -297,10 +305,26 @@ void MobManager::combatStep(Mob *mob, time_t currTime) {
}
}
// TODO: retreat if kited too far
// retreat if kited too far
distance = hypot(mob->appearanceData.iX - mob->spawnX, mob->appearanceData.iY - mob->spawnY);
if (distance >= mob->data["m_iCombatRange"]) {
mob->target = nullptr;
mob->state = MobState::RETREAT;
//std::cout << "retreat state\n";
}
}
/*
* TODO: precalculate a path, lerp through it, repeat.
* The way it works right now, mobs only move around a little bit. This will result
* in more natural movement, and will mesh well with pre-calculated paths (for Don Doom,
* Bad Max, etc.) once those have been made.
*/
void MobManager::roamingStep(Mob *mob, time_t currTime) {
// some mobs don't move (and we mustn't divide/modulus by zero)
if (mob->idleRange == 0)
return;
if (mob->nextMovement != 0 && currTime < mob->nextMovement)
return;
@ -315,18 +339,21 @@ void MobManager::roamingStep(Mob *mob, time_t currTime) {
int xStart = mob->spawnX - mob->idleRange/2;
int yStart = mob->spawnY - mob->idleRange/2;
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = mob->data["m_iWalkSpeed"];
pkt.iToX = mob->appearanceData.iX = xStart + rand() % mob->idleRange;
pkt.iToY = mob->appearanceData.iY = yStart + rand() % mob->idleRange;
pkt.iToZ = mob->appearanceData.iZ;
int farX = xStart + rand() % mob->idleRange;
int farY = yStart + rand() % mob->idleRange;
int speed = mob->data["m_iWalkSpeed"];
// roughly halve movement speed if snared
// TODO: this logic isn't quite right yet, since they still get to the same spot
if (mob->appearanceData.iConditionBitFlag & CSB_BIT_DN_MOVE_SPEED) {
mob->nextMovement += delay;
pkt.iSpeed /= 2;
}
// halve movement speed if snared
if (mob->appearanceData.iConditionBitFlag & CSB_BIT_DN_MOVE_SPEED)
speed /= 2;
auto targ = lerp(mob->appearanceData.iX, mob->appearanceData.iY, farX, farY, speed);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = speed;
pkt.iToX = mob->appearanceData.iX = targ.first;
pkt.iToY = mob->appearanceData.iY = targ.second;
pkt.iToZ = mob->appearanceData.iZ;
auto chunk = ChunkManager::grabChunk(mob->appearanceData.iX, mob->appearanceData.iY);
auto chunks = ChunkManager::grabChunks(chunk);
@ -349,10 +376,12 @@ void MobManager::retreatStep(Mob *mob, time_t currTime) {
auto chunk = ChunkManager::grabChunk(mob->appearanceData.iX, mob->appearanceData.iY);
auto chunks = ChunkManager::grabChunks(chunk);
auto targ = lerp(mob->appearanceData.iX, mob->appearanceData.iY, mob->spawnX, mob->spawnY, mob->data["m_iRunSpeed"]);
pkt.iNPC_ID = mob->appearanceData.iNPC_ID;
pkt.iSpeed = mob->data["m_iWalkSpeed"];
pkt.iToX = mob->appearanceData.iX = mob->spawnX;
pkt.iToY = mob->appearanceData.iY = mob->spawnY;
pkt.iSpeed = mob->data["m_iRunSpeed"];
pkt.iToX = mob->appearanceData.iX = targ.first;
pkt.iToY = mob->appearanceData.iY = targ.second;
pkt.iToZ = mob->appearanceData.iZ;
// notify all nearby players
@ -366,7 +395,7 @@ void MobManager::retreatStep(Mob *mob, time_t currTime) {
// if we got there
if (distance <= mob->data["m_iIdleRange"]) {
mob->state = MobState::ROAMING;
std::cout << "roaming state\n";
//std::cout << "roaming state\n";
mob->appearanceData.iHP = mob->maxHealth;
mob->killedTime = 0;
mob->nextAttack = 0;
@ -388,6 +417,9 @@ void MobManager::step(CNServer *serv, time_t currTime) {
continue;
switch (pair.second->state) {
case MobState::INACTIVE:
// no-op
break;
case MobState::ROAMING:
roamingStep(pair.second, currTime);
break;
@ -400,9 +432,24 @@ void MobManager::step(CNServer *serv, time_t currTime) {
case MobState::DEAD:
deadStep(pair.second, currTime);
break;
default:
// unhandled for now
break;
}
}
}
/*
* Dynamic lerp; distinct from TransportManager::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.
*/
std::pair<int,int> MobManager::lerp(int x1, int y1, int x2, int y2, int speed) {
std::pair<int,int> ret = {};
int distance = hypot(x1 - x2, y1 - y2);
int lerps = distance / speed;
// interpolate only the first point
float frac = 1.0f / (lerps+1);
ret.first = (x1 * (1.0f - frac)) + (x2 * frac);
ret.second = (y1 * (1.0f - frac)) + (y2 * frac);
return ret;
}

3
src/MobManager.hpp
View File

@ -27,7 +27,7 @@ struct Mob : public BaseNPC {
// dead
time_t killedTime = 0;
int regenTime;
time_t regenTime;
bool despawned = false; // for the sake of death animations
// roaming
@ -85,4 +85,5 @@ namespace MobManager {
void npcAttackPc(Mob *mob);
void killMob(CNSocket *sock, Mob *mob);
void giveReward(CNSocket *sock);
std::pair<int,int> lerp(int, int, int, int, int);
}