ReGameDLL_CS/regamedll/dlls/bot/cs_bot_update.cpp

/*
*
*   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 2 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, write to the Free Software Foundation,
*   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
*   In addition, as a special exception, the author gives permission to
*   link the code of this program with the Half-Life Game Engine ("HL
*   Engine") and Modified Game Libraries ("MODs") developed by Valve,
*   L.L.C ("Valve").  You must obey the GNU General Public License in all
*   respects for all of the code used other than the HL Engine and MODs
*   from Valve.  If you modify this file, you may extend this exception
*   to your version of the file, but you are not obligated to do so.  If
*   you do not wish to do so, delete this exception statement from your
*   version.
*
*/

#include "precompiled.h"

// Lightweight maintenance, invoked frequently
void CCSBot::Upkeep()
{
	if (TheCSBots()->IsLearningMap() || !IsAlive())
		return;

	if (m_isRapidFiring)
		TogglePrimaryAttack();

	// aiming must be smooth - update often
	if (IsAimingAtEnemy())
	{
		UpdateAimOffset();

		// aim at enemy, if he's still alive
		if (m_enemy.IsValid())
		{
			float feetOffset = pev->origin.z - GetFeetZ();

			if (IsEnemyVisible())
			{
				if (GetProfile()->GetSkill() > 0.5f)
				{
					const float k = 3.0f;
					m_aimSpot = (m_enemy->pev->velocity - pev->velocity) * g_flBotCommandInterval * k + m_enemy->pev->origin;
				}
				else
					m_aimSpot = m_enemy->pev->origin;

				bool aimBlocked = false;
				const float sharpshooter = 0.8f;

				if (IsUsingAWP() || IsUsingShotgun() || IsUsingMachinegun() || GetProfile()->GetSkill() < sharpshooter
					|| (IsActiveWeaponRecoilHigh() && !IsUsingPistol() && !IsUsingSniperRifle()))
				{
					if (IsEnemyPartVisible(CHEST))
					{
						// No headshots, go for the chest.
						aimBlocked = true;
					}
				}

				if (aimBlocked)
					m_aimSpot.z -= feetOffset * 0.25f;

				else if (!IsEnemyPartVisible(HEAD))
				{
					if (IsEnemyPartVisible(CHEST))
					{
						m_aimSpot.z -= feetOffset * 0.5f;
					}
					else if (IsEnemyPartVisible(LEFT_SIDE))
					{
						Vector2D to = (m_enemy->pev->origin - pev->origin).Make2D();
						to.NormalizeInPlace();

						m_aimSpot.x -= to.y * 16.0f;
						m_aimSpot.y += to.x * 16.0f;
						m_aimSpot.z -= feetOffset * 0.5f;
					}
					else if (IsEnemyPartVisible(RIGHT_SIDE))
					{
						Vector2D to = (m_enemy->pev->origin - pev->origin).Make2D();
						to.NormalizeInPlace();

						m_aimSpot.x += to.y * 16.0f;
						m_aimSpot.y -= to.x * 16.0f;
						m_aimSpot.z -= feetOffset * 0.5f;
					}
					else // FEET
					{
						m_aimSpot.z -= (feetOffset + feetOffset);
					}
				}
			}
			else
			{
				m_aimSpot = m_lastEnemyPosition;
			}

			// add in aim error
			m_aimSpot.x += m_aimOffset.x;
			m_aimSpot.y += m_aimOffset.y;
			m_aimSpot.z += m_aimOffset.z;

			Vector toEnemy = m_aimSpot - pev->origin;
			Vector idealAngle = UTIL_VecToAngles(toEnemy);

			idealAngle.x = 360.0 - idealAngle.x;
			SetLookAngles(idealAngle.y, idealAngle.x);
		}
	}
	else
	{
		if (m_lookAtSpotClearIfClose)
		{
			// dont look at spots just in front of our face - it causes erratic view rotation
			const float tooCloseRange = 100.0f;
			if ((m_lookAtSpot - pev->origin).IsLengthLessThan(tooCloseRange))
				m_lookAtSpotState = NOT_LOOKING_AT_SPOT;
		}

		switch (m_lookAtSpotState)
		{
		case NOT_LOOKING_AT_SPOT:
		{
			// look ahead
			SetLookAngles(m_lookAheadAngle, 0);
			break;
		}
		case LOOK_TOWARDS_SPOT:
		{
			UpdateLookAt();

			if (IsLookingAtPosition(&m_lookAtSpot, m_lookAtSpotAngleTolerance))
			{
				m_lookAtSpotState = LOOK_AT_SPOT;
				m_lookAtSpotTimestamp = gpGlobals->time;
			}
			break;
		}
		case LOOK_AT_SPOT:
		{
			UpdateLookAt();

			if (m_lookAtSpotDuration >= 0.0f && gpGlobals->time - m_lookAtSpotTimestamp > m_lookAtSpotDuration)
			{
				m_lookAtSpotState = NOT_LOOKING_AT_SPOT;
				m_lookAtSpotDuration = 0.0f;
			}
			break;
		}
		}

		float driftAmplitude = 2.0f;

		// have view "drift" very slowly, so view looks "alive"
		if (IsUsingSniperRifle() && IsUsingScope())
		{
			driftAmplitude = 0.5f;
		}

		m_lookYaw += driftAmplitude * BotCOS(33.0f * gpGlobals->time);
		m_lookPitch += driftAmplitude * BotSIN(13.0f * gpGlobals->time);
	}

	// view angles can change quickly
	UpdateLookAngles();
}

// Heavyweight processing, invoked less often
void CCSBot::Update()
{
	if (TheCSBots()->IsAnalysisRequested() && m_processMode == PROCESS_NORMAL)
	{
		TheCSBots()->AckAnalysisRequest();
		StartAnalyzeAlphaProcess();
	}

	switch (m_processMode)
	{
	case PROCESS_LEARN:         UpdateLearnProcess();        return;
	case PROCESS_ANALYZE_ALPHA: UpdateAnalyzeAlphaProcess(); return;
	case PROCESS_ANALYZE_BETA:  UpdateAnalyzeBetaProcess();  return;
	case PROCESS_SAVE:          UpdateSaveProcess();         return;
	}

	// update our radio chatter
	// need to allow bots to finish their chatter even if they are dead
	GetChatter()->Update();

	if (m_voiceFeedbackEndTimestamp != 0.0f
		&& (m_voiceFeedbackEndTimestamp <= gpGlobals->time || gpGlobals->time < m_voiceFeedbackStartTimestamp))
	{
		EndVoiceFeedback(NO_FORCE);
	}

	// check if we are dead
	if (!IsAlive())
	{
		// remember that we died
		m_diedLastRound = true;
		BotDeathThink();
		return;
	}

	// show line of fire
	if ((cv_bot_traceview.value == 100.0 && IsLocalPlayerWatchingMe()) || cv_bot_traceview.value == 101.0)
	{
		UTIL_MakeVectors(pev->punchangle + pev->v_angle);

		if (!IsFriendInLineOfFire())
		{
			Vector vecAiming = gpGlobals->v_forward;
			Vector vecSrc = GetGunPosition();

			if (m_iTeam == TERRORIST)
				UTIL_DrawBeamPoints(vecSrc, vecSrc + 2000.0f * vecAiming, 1, 255, 0, 0);
			else
				UTIL_DrawBeamPoints(vecSrc, vecSrc + 2000.0f * vecAiming, 1, 0, 50, 255);
		}
	}

	//
	// Debug beam rendering
	//

	// show approach points
	if ((cv_bot_traceview.value == 2.0f && IsLocalPlayerWatchingMe()) || cv_bot_traceview.value == 3.0f)
		DrawApproachPoints();

	// show encounter spot data
	if ((cv_bot_traceview.value == 4.0f && IsLocalPlayerWatchingMe()) || cv_bot_traceview.value == 5.0f)
	{
		if (m_spotEncounter)
		{
			UTIL_DrawBeamPoints(m_spotEncounter->path.from, m_spotEncounter->path.to, 3, 0, 0, 255);

			Vector dir = m_spotEncounter->path.to - m_spotEncounter->path.from;
			float length = dir.NormalizeInPlace();

			for (auto &order : m_spotEncounter->spotList) {
				UTIL_DrawBeamPoints(m_spotEncounter->path.from + order.t * length * dir, *order.spot->GetPosition(), 3, 0, 255, 255);
			}
		}
	}

	// show path navigation data
	if (cv_bot_traceview.value == 1.0f && IsLocalPlayerWatchingMe())
	{
		Vector from = GetEyePosition();
		const float size = 50.0f;

		Vector arrow(size * float(Q_cos(m_lookAheadAngle * M_PI / 180.0f)), size * float(Q_sin(m_lookAheadAngle * M_PI / 180.0f)), 0.0f);
		UTIL_DrawBeamPoints(from, from + arrow, 1, 0, 255, 255);
	}

	if (cv_bot_stop.value != 0.0f)
		return;

	// check if we are stuck
	StuckCheck();

	// if our current 'noise' was heard a long time ago, forget it
	const float rememberNoiseDuration = 20.0f;
	if (m_noiseTimestamp > 0.0f && gpGlobals->time - m_noiseTimestamp > rememberNoiseDuration)
	{
		ForgetNoise();
	}

	// where are we
	if (!m_currentArea || !m_currentArea->Contains(&pev->origin))
	{
		m_currentArea = TheNavAreaGrid.GetNavArea(&pev->origin);
	}

	// track the last known area we were in
	if (m_currentArea && m_currentArea != m_lastKnownArea)
	{
		m_lastKnownArea = m_currentArea;
		// assume that we "clear" an area of enemies when we enter it
		m_currentArea->SetClearedTimestamp(m_iTeam - 1);
	}

	// update approach points
	const float recomputeApproachPointTolerance = 50.0f;
	if ((m_approachPointViewPosition - pev->origin).IsLengthGreaterThan(recomputeApproachPointTolerance))
	{
		ComputeApproachPoints();
		m_approachPointViewPosition = pev->origin;
	}

	if (cv_bot_show_nav.value > 0.0f && m_lastKnownArea)
	{
		m_lastKnownArea->DrawConnectedAreas();
	}

	// if we're blind, retreat!
	if (IsBlind())
	{
		if (!IsAtHidingSpot())
		{
			switch (m_blindMoveDir)
			{
			case FORWARD:  MoveForward();  break;
			case RIGHT:    StrafeRight();  break;
			case BACKWARD: MoveBackward(); break;
			case LEFT:     StrafeLeft();   break;
			default:       Crouch();       break;
			}
		}

		if (m_blindFire)
		{
			PrimaryAttack();
		}

		return;
	}

	// Enemy acquisition and attack initiation
	// take a snapshot and update our reaction time queue
	UpdateReactionQueue();

	// "threat" may be the same as our current enemy
	CBasePlayer *threat = GetRecognizedEnemy();
	if (threat)
	{
		// adjust our personal "safe" time
		AdjustSafeTime();

		if (IsUsingGrenade())
		{
			ThrowGrenade(&threat->pev->origin);
		}
		else
		{
			// Decide if we should attack
			bool doAttack = false;
			switch (GetDisposition())
			{
			case IGNORE_ENEMIES:
			{
				// never attack
				doAttack = false;
				break;
			}
			case SELF_DEFENSE:
			{
				// attack if fired on
				doAttack = IsPlayerLookingAtMe(threat);

				// attack if enemy very close
				if (!doAttack)
				{
					const float selfDefenseRange = 750.0f;
					doAttack = (pev->origin - threat->pev->origin).IsLengthLessThan(selfDefenseRange);
				}
				break;
			}
			case ENGAGE_AND_INVESTIGATE:
			case OPPORTUNITY_FIRE:
			{
				// normal combat range
				doAttack = true;
				break;
			}
			}

			if (doAttack)
			{
				if (!GetEnemy() || threat != GetEnemy() || !IsAttacking())
				{
					if (IsUsingKnife() && IsHiding())
					{
						// if hiding with a knife, wait until threat is close
						const float knifeAttackRange = 250.0f;
						if ((pev->origin - threat->pev->origin).IsLengthLessThan(knifeAttackRange))
						{
							Attack(threat);
						}
					}
					else
					{
						Attack(threat);
					}
				}
			}
			else
			{
				// dont attack, but keep track of nearby enemies
				SetEnemy(threat);
				m_isEnemyVisible = true;
			}
		}

		// if we aren't attacking but we are being attacked, retaliate
		if (GetDisposition() != IGNORE_ENEMIES && !IsAttacking())
		{
			const float recentAttackDuration = 1.0f;
			if (GetTimeSinceAttacked() < recentAttackDuration)
			{
				// we may not be attacking our attacker, but at least we're not just taking it
				// (since m_attacker isn't reaction-time delayed, we can't directly use it)
				Attack(threat);
				PrintIfWatched("Ouch! Retaliating!\n");
			}
		}

		TheCSBots()->SetLastSeenEnemyTimestamp();
	}

	// Validate existing enemy, if any
	if (m_enemy.IsValid())
	{
		if (IsAwareOfEnemyDeath())
		{
			// we have noticed that our enemy has died
			m_enemy = nullptr;
			m_isEnemyVisible = false;
		}
		else
		{
			const int dada = offsetof(CCSBot, m_visibleEnemyParts);
			// check LOS to current enemy (chest & head), in case he's dead (GetNearestEnemy() only returns live players)
			// note we're not checking FOV - once we've acquired an enemy (which does check FOV), assume we know roughly where he is
			if (IsVisible(m_enemy, false, &m_visibleEnemyParts))
			{
				m_isEnemyVisible = true;
				m_lastSawEnemyTimestamp = gpGlobals->time;
				m_lastEnemyPosition = m_enemy->pev->origin;
			}
			else
			{
				m_isEnemyVisible = false;
			}

			// check if enemy died
			if (m_enemy->IsAlive())
			{
				m_enemyDeathTimestamp = 0.0f;
				m_isLastEnemyDead = false;
			}
			else if (m_enemyDeathTimestamp == 0.0f)
			{
				// note time of death (to allow bots to overshoot for a time)
				m_enemyDeathTimestamp = gpGlobals->time;
				m_isLastEnemyDead = true;
			}
		}
	}
	else
	{
		m_isEnemyVisible = false;
	}

	// if we have seen an enemy recently, keep an eye on him if we can
	const float seenRecentTime = 3.0f;
	if (m_enemy.IsValid() && GetTimeSinceLastSawEnemy() < seenRecentTime)
	{
		AimAtEnemy();
	}
	else
	{
		StopAiming();
	}

	// Hack to fire while retreating
	// TODO: Encapsulate aiming and firing on enemies separately from current task
	if (GetDisposition() == IGNORE_ENEMIES)
	{
		FireWeaponAtEnemy();
	}

	if (IsEndOfSafeTime() && IsUsingGrenade() && (IsWellPastSafe() || !IsUsingHEGrenade()) && !m_isWaitingToTossGrenade)
	{
		Vector target;
		if (FindGrenadeTossPathTarget(&target))
		{
			ThrowGrenade(&target);
		}
	}

	if (IsUsingGrenade())
	{
		bool doToss = (m_isWaitingToTossGrenade && (m_tossGrenadeTimer.IsElapsed() || m_lookAtSpotState == LOOK_AT_SPOT));

		if (doToss)
		{
			ClearPrimaryAttack();
			m_isWaitingToTossGrenade = false;
		}
		else
		{
			PrimaryAttack();
		}
	}
	else
	{
		m_isWaitingToTossGrenade = false;
	}

	if (IsHunting() && IsWellPastSafe() && IsUsingGrenade())
	{
		EquipBestWeapon(MUST_EQUIP);
	}

	// check if our weapon is totally out of ammo
	// or if we no longer feel "safe", equip our weapon
	if (!IsSafe() && !IsUsingGrenade() && IsActiveWeaponOutOfAmmo())
	{
		EquipBestWeapon();
	}

	// TODO: This doesn't work if we are restricted to just knives and sniper rifles because we cant use the rifle at close range
	if (!IsSafe() && !IsUsingGrenade() && IsUsingKnife() && !IsEscapingFromBomb())
	{
		EquipBestWeapon();
	}

	// if we haven't seen an enemy in awhile, and we switched to our pistol during combat,
	// switch back to our primary weapon (if it still has ammo left)
	const float safeRearmTime = 5.0f;
	if (!IsActiveWeaponReloading() && IsUsingPistol() && !IsPrimaryWeaponEmpty() && GetTimeSinceLastSawEnemy() > safeRearmTime)
	{
		EquipBestWeapon();
	}

	// reload our weapon if we must
	ReloadCheck();

	// equip silencer
	SilencerCheck();

	// listen to the radio
	RespondToRadioCommands();

	// make way
	const float avoidTime = 0.33f;
	if (gpGlobals->time - m_avoidTimestamp < avoidTime && m_avoid)
	{
		StrafeAwayFromPosition(&m_avoid->pev->origin);
	}
	else
	{
		m_avoid = nullptr;
	}

	if (m_isJumpCrouching)
	{
		const float duration = 0.75f;
		const float crouchDelayTime = 0.05f;
		const float standUpTime = 0.6f;
		float elapsed = gpGlobals->time - m_jumpCrouchTimestamp;

		if (elapsed > crouchDelayTime && elapsed < standUpTime)
			Crouch();

		if (elapsed >= standUpTime)
			StandUp();

		if (elapsed > duration)
			m_isJumpCrouching = false;
	}

	// if we're using a sniper rifle and are no longer attacking, stop looking thru scope
	if (!IsAtHidingSpot() && !IsAttacking() && IsUsingSniperRifle() && IsUsingScope())
	{
		SecondaryAttack();
	}

	// check encounter spots
	UpdatePeripheralVision();

	// Update gamestate
	if (m_bomber)
	{
		GetChatter()->SpottedBomber(GetBomber());
	}

	if (CanSeeLooseBomb())
	{
		GetChatter()->SpottedLooseBomb(TheCSBots()->GetLooseBomb());
	}

	// Scenario interrupts
	switch (TheCSBots()->GetScenario())
	{
	case CCSBotManager::SCENARIO_DEFUSE_BOMB:
	{
		// flee if the bomb is ready to blow and we aren't defusing it or attacking and we know where the bomb is
		// (aggressive players wait until its almost too late)
		float gonnaBlowTime = 8.0f - (2.0f * GetProfile()->GetAggression());

		// if we have a defuse kit, can wait longer
		if (m_bHasDefuser)
			gonnaBlowTime *= 0.66f;

		if (!IsEscapingFromBomb()								// we aren't already escaping the bomb
			&& TheCSBots()->IsBombPlanted()						// is the bomb planted
			&& GetGameState()->IsPlantedBombLocationKnown()		// we know where the bomb is
			&& TheCSBots()->GetBombTimeLeft() < gonnaBlowTime	// is the bomb about to explode
			&& !IsDefusingBomb()								// we aren't defusing the bomb
			&& !IsAttacking())									// we aren't in the midst of a firefight
		{
			EscapeFromBomb();
			break;
		}
		break;
	}
	case CCSBotManager::SCENARIO_RESCUE_HOSTAGES:
	{
		if (m_iTeam == CT)
		{
			UpdateHostageEscortCount();
		}
		else
		{
			// Terrorists have imperfect information on status of hostages
			CSGameState::ValidateStatusType status = GetGameState()->ValidateHostagePositions();

			if (status & CSGameState::HOSTAGES_ALL_GONE)
			{
				GetChatter()->HostagesTaken();
				Idle();
			}
			else if (status & CSGameState::HOSTAGE_GONE)
			{
				GetGameState()->HostageWasTaken();
				Idle();
			}
		}
		break;
	}
	}

	// Follow nearby humans if our co-op is high and we have nothing else to do
	// If we were just following someone, don't auto-follow again for a short while to
	// give us a chance to do something else.
	const float earliestAutoFollowTime = 5.0f;
	const float minAutoFollowTeamwork = 0.4f;
	if (TheCSBots()->GetElapsedRoundTime() > earliestAutoFollowTime
		&& GetProfile()->GetTeamwork() > minAutoFollowTeamwork
		&& CanAutoFollow()
		&& !IsBusy()
		&& !IsFollowing()
		&& !GetGameState()->IsAtPlantedBombsite())
	{
		// chance of following is proportional to teamwork attribute
		if (GetProfile()->GetTeamwork() > RANDOM_FLOAT(0.0f, 1.0f))
		{
			CBasePlayer *leader = GetClosestVisibleHumanFriend();
			if (leader && leader->IsAutoFollowAllowed())
			{
				// count how many bots are already following this player
				const float maxFollowCount = 2;
				if (GetBotFollowCount(leader) < maxFollowCount)
				{
					const float autoFollowRange = 300.0f;
					if ((leader->pev->origin - pev->origin).IsLengthLessThan(autoFollowRange))
					{
						CNavArea *leaderArea = TheNavAreaGrid.GetNavArea(&leader->pev->origin);
						if (leaderArea)
						{
							PathCost cost(this, FASTEST_ROUTE);
							float travelRange = NavAreaTravelDistance(GetLastKnownArea(), leaderArea, cost);
							if (/*travelRange >= 0.0f &&*/ travelRange < autoFollowRange)
							{
								// follow this human
								Follow(leader);
								PrintIfWatched("Auto-Following %s\n", STRING(leader->pev->netname));

								if (CSGameRules()->IsCareer())
								{
									GetChatter()->Say("FollowingCommander", 10.0f);
								}
								else
								{
									GetChatter()->Say("FollowingSir", 10.0f);
								}
							}
						}
					}
				}
			}
		}
		else
		{
			// we decided not to follow, don't re-check for a duration
			m_allowAutoFollowTime = gpGlobals->time + 15.0f + (1.0f - GetProfile()->GetTeamwork()) * 30.0f;
		}
	}

	if (IsFollowing())
	{
		// if we are following someone, make sure they are still alive
		CBaseEntity *pLeader = m_leader;
		if (!pLeader || !pLeader->IsAlive())
		{
			StopFollowing();
		}

		// decide whether to continue following them
		const float highTeamwork = 0.85f;
		if (GetProfile()->GetTeamwork() < highTeamwork)
		{
			float minFollowDuration = 15.0f;
			if (GetFollowDuration() > minFollowDuration + 40.0f * GetProfile()->GetTeamwork())
			{
				// we are bored of following our leader
				StopFollowing();
				PrintIfWatched("Stopping following - bored\n");
			}
		}
	}
	else
	{
		if (GetMorale() < NEUTRAL && IsSafe() && GetSafeTimeRemaining() < 2.0f && IsHunting())
		{
			if (GetMorale() * -40.0 > RANDOM_FLOAT(0.0f, 100.0f))
			{
				if (TheCSBots()->IsOnOffense(this) || !TheCSBots()->IsDefenseRushing())
				{
					SetDisposition(OPPORTUNITY_FIRE);
					Hide(m_lastKnownArea, RANDOM_FLOAT(3.0f, 15.0f));
					GetChatter()->Say("WaitingHere");
				}
			}
		}
	}

	// Execute state machine
	if (m_isAttacking)
	{
		m_attackState.OnUpdate(this);
	}
	else
	{
		m_state->OnUpdate(this);
	}

	if (m_isWaitingToTossGrenade)
	{
		ResetStuckMonitor();
		ClearMovement();
	}

	// don't move while reloading unless we see an enemy
	if (IsReloading() && !m_isEnemyVisible)
	{
		ResetStuckMonitor();
		ClearMovement();
	}

	// if we get too far ahead of the hostages we are escorting, wait for them
	if (!IsAttacking() && m_inhibitWaitingForHostageTimer.IsElapsed())
	{
		const float waitForHostageRange = 500.0f;
		if (GetTask() == RESCUE_HOSTAGES && GetRangeToFarthestEscortedHostage() > waitForHostageRange)
		{
			if (!m_isWaitingForHostage)
			{
				// just started waiting
				m_isWaitingForHostage = true;
				m_waitForHostageTimer.Start(10.0f);
			}
			else
			{
				// we've been waiting
				if (m_waitForHostageTimer.IsElapsed())
				{
					// give up waiting for awhile
					m_isWaitingForHostage = false;
					m_inhibitWaitingForHostageTimer.Start(3.0f);
				}
				else
				{
					// keep waiting
					ResetStuckMonitor();
					ClearMovement();
				}
			}
		}
	}

	// remember our prior safe time status
	m_wasSafe = IsSafe();
}