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game/server/hl2/npc_missiledefense.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include	"ai_basenpc.h"
+#include	"ai_hull.h"
+#include	"ai_senses.h"
+#include	"ai_memory.h"
+#include	"soundent.h"
+#include	"smoke_trail.h"
+#include	"weapon_rpg.h"
+#include	"gib.h"
+#include	"ndebugoverlay.h"
+#include "IEffects.h"
+#include "vstdlib/random.h"
+#include "engine/IEngineSound.h"
+#include "ammodef.h"
+#include "hl2_shareddefs.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#define MD_FULLAMMO	50
+
+
+#define MD_BC_YAW		0
+#define MD_BC_PITCH		1
+#define MD_AP_LGUN		2
+#define MD_AP_RGUN		1
+#define MD_GIB_COUNT	4
+#define MD_GIB_MODEL	"models/gibs/missile_defense_gibs.mdl"
+#define MD_YAW_SPEED	24
+#define MD_PITCH_SPEED  12
+
+//=========================================================
+//=========================================================
+class CNPC_MissileDefense : public CAI_BaseNPC
+{
+	DECLARE_CLASS( CNPC_MissileDefense, CAI_BaseNPC );
+	DECLARE_DATADESC();
+
+public:
+	CNPC_MissileDefense( void ) { };
+	void	Precache( void );
+	void	Spawn( void );
+	Class_T Classify( void ) { return CLASS_NONE; }
+	int		GetSoundInterests( void ) { return SOUND_NONE; }
+	float	MaxYawSpeed( void ) { return 90.f; }
+
+	void	RunAI(void);
+	void	FireCannons( void );
+	void	AimGun( void );
+	void	EnemyShootPosition(CBaseEntity* pEnemy, Vector *vPosition);
+
+	void	Event_Killed( const CTakeDamageInfo &info );
+	int		OnTakeDamage_Alive( const CTakeDamageInfo &info );
+	void	Gib();
+	void	GetGunAim( Vector *vecAim );	
+	~CNPC_MissileDefense();
+
+	Vector		m_vGunAng;
+	int			m_iAmmoLoaded;
+	float		m_flReloadedTime;
+};
+
+LINK_ENTITY_TO_CLASS( npc_missiledefense, CNPC_MissileDefense );
+
+//=========================================================
+//=========================================================
+BEGIN_DATADESC( CNPC_MissileDefense )
+
+	DEFINE_FIELD( m_iAmmoLoaded,		FIELD_INTEGER ),
+	DEFINE_FIELD( m_flReloadedTime,	FIELD_TIME ),
+	DEFINE_FIELD( m_vGunAng,			FIELD_VECTOR ),
+
+END_DATADESC()
+
+//---------------------------------------------------------
+//---------------------------------------------------------
+void CNPC_MissileDefense::Precache( void )
+{
+	PrecacheModel("models/missile_defense.mdl");
+	PrecacheModel(MD_GIB_MODEL);
+
+	PrecacheScriptSound( "NPC_MissileDefense.Attack" );
+	PrecacheScriptSound( "NPC_MissileDefense.Reload" );
+	PrecacheScriptSound( "NPC_MissileDefense.Turn" );
+
+}
+
+
+//---------------------------------------------------------
+//---------------------------------------------------------
+void CNPC_MissileDefense::GetGunAim( Vector *vecAim )
+{
+	Vector vecPos;
+	QAngle vecAng;
+
+	GetAttachment( MD_AP_LGUN, vecPos, vecAng );
+
+	vecAng.x = GetLocalAngles().x + GetBoneController( MD_BC_PITCH );
+	vecAng.z = 0;
+	vecAng.y = GetLocalAngles().y + GetBoneController( MD_BC_YAW );
+
+	Vector vecForward;
+	AngleVectors( vecAng, &vecForward );
+
+	*vecAim = vecForward;
+}
+
+
+#define NOISE 0.035f
+#define MD_ATTN_CANNON 0.4
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::FireCannons( void )
+{
+	// ----------------------------------------------
+	//  Make sure I have an enemy
+	// ----------------------------------------------
+	if (GetEnemy() == NULL)
+	{
+		return;
+	}
+
+	// ----------------------------------------------
+	//  Make sure I have ammo
+	// ----------------------------------------------
+	if( m_iAmmoLoaded < 1 )
+	{
+		return;
+	}
+	// ----------------------------------------------
+	// Make sure gun it pointing in right direction	
+	// ----------------------------------------------
+	Vector vGunDir;
+	GetGunAim( &vGunDir );
+	Vector vTargetPos;
+	EnemyShootPosition(GetEnemy(),&vTargetPos);
+
+	Vector vTargetDir = vTargetPos - GetAbsOrigin();
+	VectorNormalize( vTargetDir );
+
+	float fDotPr = DotProduct( vGunDir, vTargetDir );
+	if (fDotPr < 0.95)
+	{
+		return;
+	}
+
+	// ----------------------------------------------
+	// Check line of sight
+	// ----------------------------------------------
+	trace_t tr;
+	AI_TraceLine( GetEnemy()->EyePosition(), GetAbsOrigin(), MASK_SOLID_BRUSHONLY, this, COLLISION_GROUP_NONE, &tr);
+	if (tr.fraction < 1.0)
+	{
+		return;
+	}
+
+	Vector vecRight;
+	Vector vecDir;
+	Vector vecCenter;
+	AngleVectors( GetLocalAngles(), NULL, &vecRight, NULL );
+
+	vecCenter = WorldSpaceCenter();
+
+	if( GetEnemy() == NULL )
+	{
+		return;
+	}
+
+	bool fSound = false;
+	if( random->RandomInt( 0, 3 ) == 0 )
+	{
+		fSound = true;
+	}
+
+
+	EmitSound( "NPC_MissileDefense.Attack" );
+
+	Vector vecGun;
+	QAngle vecAng;
+	
+	GetAttachment( MD_AP_LGUN, vecGun, vecAng );
+
+	Vector vecTarget;
+	EnemyShootPosition(GetEnemy(),&vecTarget);
+
+	vecDir = vecTarget - vecCenter;
+	VectorNormalize(vecDir);
+	vecDir.x += random->RandomFloat( -NOISE, NOISE );
+	vecDir.y += random->RandomFloat( -NOISE, NOISE );
+
+	Vector vecStart = vecGun + vecDir * 110;
+	Vector vecEnd	= vecGun + vecDir * 4096;
+	UTIL_Tracer( vecStart, vecEnd, 0, TRACER_DONT_USE_ATTACHMENT, 3000 + random->RandomFloat( 0, 2000 ), fSound );
+
+	vecDir = vecTarget - vecCenter;
+	VectorNormalize(vecDir);
+	vecDir.x += random->RandomFloat( -NOISE, NOISE );
+	vecDir.y += random->RandomFloat( -NOISE, NOISE );
+	vecDir.z += random->RandomFloat( -NOISE, NOISE );
+
+	GetAttachment( MD_AP_RGUN, vecGun, vecAng );
+	vecStart = vecGun + vecDir * 110;
+	vecEnd = vecGun + vecDir * 4096;
+	UTIL_Tracer( vecStart, vecEnd, 0, TRACER_DONT_USE_ATTACHMENT, 3000 + random->RandomFloat( 0, 2000 ) );
+
+	m_iAmmoLoaded -= 2;
+
+	if( m_iAmmoLoaded < 1 )
+	{
+		// Incite a reload.
+		EmitSound( "NPC_MissileDefense.Reload" );
+		m_flReloadedTime = gpGlobals->curtime + 0.3;
+		return;
+	}
+
+	// Do damage to the missile based on distance.
+	// if < 1, make damage 0.
+
+	float flDist = (GetEnemy()->GetLocalOrigin() - vecGun).Length();
+	float flDamage;
+
+	flDamage = 4000 - flDist;
+
+	flDamage /= 1000.0;
+
+	if( flDamage > 0 )
+	{
+		if( flDist <= 1500 )
+		{
+			flDamage *= 2;
+		}
+
+		CTakeDamageInfo info( this, this, flDamage, DMG_MISSILEDEFENSE );
+		CalculateBulletDamageForce( &info, GetAmmoDef()->Index("SMG1"), vecDir, GetEnemy()->GetAbsOrigin() );
+		GetEnemy()->TakeDamage( info );
+	}
+}
+
+
+//---------------------------------------------------------
+//---------------------------------------------------------
+void CNPC_MissileDefense::Spawn( void )
+{
+	Precache();
+
+	SetModel( "models/missile_defense.mdl" );
+	UTIL_SetSize( this, Vector( -36, -36 , 0 ), Vector( 36, 36, 64 ) );
+
+	SetSolid( SOLID_BBOX );
+	SetMoveType( MOVETYPE_NONE );
+	m_takedamage		= DAMAGE_YES;
+	SetBloodColor( DONT_BLEED );
+	m_iHealth			= 10;
+	m_flFieldOfView		= 0.1;
+	m_NPCState			= NPC_STATE_NONE;
+	CapabilitiesClear();
+	CapabilitiesAdd ( bits_CAP_INNATE_RANGE_ATTACK1 );
+
+	// Hate missiles	
+	AddClassRelationship( CLASS_MISSILE, D_HT, 5 );
+
+	m_spawnflags |= SF_NPC_LONG_RANGE;
+
+	m_flReloadedTime = gpGlobals->curtime;
+
+	InitBoneControllers();
+
+	NPCInit();
+
+	SetBoneController( MD_BC_YAW, 10 );
+	SetBoneController( MD_BC_PITCH, 0 );
+
+	SetBodygroup( 1, 1 );
+	SetBodygroup( 2, 1 );
+	SetBodygroup( 3, 1 );
+	SetBodygroup( 4, 1 );
+
+	m_NPCState = NPC_STATE_IDLE;
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+int CNPC_MissileDefense::OnTakeDamage_Alive( const CTakeDamageInfo &info )
+{
+	// Only take blast damage
+	if (info.GetDamageType() & DMG_BLAST )
+	{
+		return BaseClass::OnTakeDamage_Alive( info );
+	}
+	else
+	{
+		return 0;
+	}
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::Event_Killed( const CTakeDamageInfo &info )
+{
+	StopSound( "NPC_MissileDefense.Turn" );
+	Gib();
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::Gib(void)
+{
+	// Sparks
+	for (int i = 0; i < 4; i++)
+	{
+		Vector sparkPos = GetAbsOrigin();
+		sparkPos.x += random->RandomFloat(-12,12);
+		sparkPos.y += random->RandomFloat(-12,12);
+		sparkPos.z += random->RandomFloat(-12,12);
+		g_pEffects->Sparks(sparkPos);
+	}
+	// Smoke
+	UTIL_Smoke(GetAbsOrigin(), random->RandomInt(10, 15), 10);
+
+	// Light
+	CBroadcastRecipientFilter filter;
+
+	te->DynamicLight( filter, 0.0,
+			&GetAbsOrigin(), 255, 180, 100, 0, 100, 0.1, 0 );
+
+	// Remove top parts
+	SetBodygroup( 1, 0 );
+	SetBodygroup( 2, 0 );
+	SetBodygroup( 3, 0 );
+	SetBodygroup( 4, 0 );
+	m_takedamage = 0;
+	SetThink(NULL);
+	
+	// Throw manhackgibs
+	CGib::SpawnSpecificGibs( this, MD_GIB_COUNT, 300, 500, MD_GIB_MODEL);
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::RunAI( void )
+{
+	// If my enemy is dead clear the memory and reset m_hEnemy
+	if (GetEnemy() != NULL && 
+		!GetEnemy()->IsAlive())
+	{
+		ClearEnemyMemory();
+		SetEnemy( NULL );
+	}
+
+	if (GetEnemy() == NULL )
+	{
+		GetSenses()->Look( 4092 );
+		SetEnemy( BestEnemy( ) );
+
+		if (GetEnemy() != NULL)
+		{
+			m_iAmmoLoaded = MD_FULLAMMO;
+			m_flReloadedTime = gpGlobals->curtime;
+		}
+	}
+
+	if( m_iAmmoLoaded < 1 && gpGlobals->curtime > m_flReloadedTime )
+	{
+		m_iAmmoLoaded = MD_FULLAMMO;
+	}
+
+	AimGun();
+	FireCannons();
+	SetNextThink( gpGlobals->curtime + 0.05 );
+}
+
+//------------------------------------------------------------------------------
+// Purpose : Add a little prediction into my enemy aim position
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::EnemyShootPosition(CBaseEntity* pEnemy, Vector *vPosition)
+{
+	// This should never happen, but just in case
+	if (!pEnemy)
+	{
+		return;
+	}
+
+	*vPosition = pEnemy->GetAbsOrigin();
+	
+	// Add prediction but prevents us from flipping around as enemy approaches us
+	float	flDist		= (pEnemy->GetAbsOrigin() - GetAbsOrigin()).Length();
+	Vector	vPredVel	= pEnemy->GetSmoothedVelocity() * 0.5;
+	if ( flDist > vPredVel.Length())
+	{
+		*vPosition += vPredVel;
+	}
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void CNPC_MissileDefense::AimGun( void )
+{
+	if (GetEnemy() == NULL)
+	{
+		StopSound( "NPC_MissileDefense.Turn" );
+		return;
+	}
+
+	Vector forward, right, up;
+	AngleVectors( GetLocalAngles(), &forward, &right, &up );
+		
+	// Get gun attachment points
+	Vector vBasePos;
+	QAngle vBaseAng;
+	GetAttachment( MD_AP_LGUN, vBasePos, vBaseAng );
+
+	Vector vTargetPos;
+	EnemyShootPosition(GetEnemy(),&vTargetPos);
+
+	Vector vTargetDir = vTargetPos - vBasePos;
+	VectorNormalize( vTargetDir );
+
+	Vector vecOut;
+	vecOut.x = DotProduct( forward, vTargetDir );
+	vecOut.y = -DotProduct( right, vTargetDir );
+	vecOut.z = DotProduct( up, vTargetDir );
+
+	QAngle angles;
+	VectorAngles(vecOut, angles);
+
+	if (angles.y > 180)
+		angles.y = angles.y - 360;
+	if (angles.y < -180)
+		angles.y = angles.y + 360;
+	if (angles.x > 180)
+		angles.x = angles.x - 360;
+	if (angles.x < -180)
+		angles.x = angles.x + 360;
+
+	float flOldX = m_vGunAng.x;
+	float flOldY = m_vGunAng.y;
+
+	if (angles.x > m_vGunAng.x)
+		m_vGunAng.x = MIN( angles.x, m_vGunAng.x + MD_PITCH_SPEED );
+	if (angles.x < m_vGunAng.x)
+		m_vGunAng.x = MAX( angles.x, m_vGunAng.x - MD_PITCH_SPEED );
+	if (angles.y > m_vGunAng.y)
+		m_vGunAng.y = MIN( angles.y, m_vGunAng.y + MD_YAW_SPEED );
+	if (angles.y < m_vGunAng.y)
+		m_vGunAng.y = MAX( angles.y, m_vGunAng.y - MD_YAW_SPEED );
+
+	m_vGunAng.y = SetBoneController( MD_BC_YAW,		m_vGunAng.y );
+	m_vGunAng.x = SetBoneController( MD_BC_PITCH,	m_vGunAng.x );
+
+	if (flOldX != m_vGunAng.x || flOldY != m_vGunAng.y)
+	{
+		EmitSound( "NPC_MissileDefense.Turn" );
+	}
+	else
+	{
+		StopSound( "NPC_MissileDefense.Turn" );
+	}
+}
+
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+CNPC_MissileDefense::~CNPC_MissileDefense(void)
+{
+	StopSound( "NPC_MissileDefense.Turn" );
+}