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game/server/tf2/tf_vehicle_battering_ram.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A moving vehicle that is used as a battering ram
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "tf_vehicle_battering_ram.h"
+#include "engine/IEngineSound.h"
+#include "VGuiScreen.h"
+#include "ammodef.h"
+#include "in_buttons.h"
+#include "shake.h"
+
+#define BATTERING_RAM_MINS			Vector(-30, -50, -10)
+#define BATTERING_RAM_MAXS			Vector( 30,  50, 55)
+#define BATTERING_RAM_MODEL			"models/objects/vehicle_battering_ram.mdl"
+
+IMPLEMENT_SERVERCLASS_ST(CVehicleBatteringRam, DT_VehicleBatteringRam)
+END_SEND_TABLE();
+
+LINK_ENTITY_TO_CLASS(vehicle_battering_ram, CVehicleBatteringRam);
+PRECACHE_REGISTER(vehicle_battering_ram);
+
+// CVars
+ConVar	vehicle_battering_ram_health( "vehicle_battering_ram_health","800", FCVAR_NONE, "Battering ram health" );
+ConVar	vehicle_battering_ram_damage( "vehicle_battering_ram_damage","300", FCVAR_NONE, "Battering ram damage" );
+ConVar	vehicle_battering_ram_damage_boostmod( "vehicle_battering_ram_damage_boostmod", "1.5", FCVAR_NONE, "Battering ram boosted damage modifier" );
+ConVar	vehicle_battering_ram_mindamagevel( "vehicle_battering_ram_mindamagevel","100", FCVAR_NONE, "Battering ram velocity for min damage" );
+ConVar	vehicle_battering_ram_maxdamagevel( "vehicle_battering_ram_maxdamagevel","260", FCVAR_NONE, "Battering ram velocity for max damage" );
+ConVar  vehicle_battering_ram_impact_time( "vehicle_battering_ram_impact_time", "1.0", FCVAR_NONE, "Battering ram impact wait time." );
+
+//-----------------------------------------------------------------------------
+// Purpose:
+//-----------------------------------------------------------------------------
+CVehicleBatteringRam::CVehicleBatteringRam()
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CVehicleBatteringRam::Precache()
+{
+	PrecacheModel( BATTERING_RAM_MODEL );
+
+	PrecacheVGuiScreen( "screen_vehicle_battering_ram" );
+	PrecacheVGuiScreen( "screen_vulnerable_point");
+
+	PrecacheScriptSound( "VehicleBatteringRam.BashSound" );
+
+	BaseClass::Precache();
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CVehicleBatteringRam::Spawn()
+{
+	SetModel( BATTERING_RAM_MODEL );
+	
+	// This size is used for placement only...
+	UTIL_SetSize(this, BATTERING_RAM_MINS, BATTERING_RAM_MAXS);
+	m_takedamage = DAMAGE_YES;
+	m_iHealth = vehicle_battering_ram_health.GetInt();
+	m_nBarrelAttachment = LookupAttachment( "barrel" );
+
+	SetType( OBJ_BATTERING_RAM );
+	SetMaxPassengerCount( 4 );
+//	SetTouch( BashTouch );
+	
+	m_flNextBashTime = 0.0f;
+
+	BaseClass::Spawn();
+}
+
+
+//-----------------------------------------------------------------------------
+// Does the player use his normal weapons while in this mode?
+//-----------------------------------------------------------------------------
+bool CVehicleBatteringRam::IsPassengerUsingStandardWeapons( int nRole )
+{
+	return (nRole > 1);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Gets info about the control panels
+//-----------------------------------------------------------------------------
+void CVehicleBatteringRam::GetControlPanelInfo( int nPanelIndex, const char *&pPanelName )
+{
+	pPanelName = "screen_vulnerable_point";
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Ram!!!
+//-----------------------------------------------------------------------------
+void CVehicleBatteringRam::VPhysicsCollision( int index, gamevcollisionevent_t *pEvent )
+{
+	int otherIndex = !index;
+	CBaseEntity *pEntity = pEvent->pEntities[otherIndex];
+
+    // We only damage objects...
+	// And only if we're travelling fast enough...
+	if ( !pEntity->IsSolid( ) )
+		return;
+
+	// Ignore shields..
+	if ( pEntity->GetCollisionGroup() == TFCOLLISION_GROUP_SHIELD )
+		return;
+
+	// Ignore anything that's not an object
+	if ( pEntity->Classify() != CLASS_MILITARY && !pEntity->IsPlayer() )
+		return;
+
+	// Ignore teammates
+	if ( InSameTeam( pEntity ))
+		return;
+
+	// Ignore invulnerable stuff
+	if ( pEntity->m_takedamage == DAMAGE_NO )
+		return;
+
+	// See if we can damage again? (Time-based)
+	if ( m_flNextBashTime > gpGlobals->curtime )
+		return;
+
+	// Use the attachment point to make sure we damage stuff that hit our front
+	// FIXME: Should we be using hitboxes here?
+	// And damage them all
+    // We only damage objects...
+ 	QAngle vecAng;
+	Vector vecSrc, vecAim;
+	GetAttachment( m_nBarrelAttachment, vecSrc, vecAng );
+
+	// Check the forward direction
+	Vector forward;
+	AngleVectors( vecAng, &forward );
+
+	// Did we hit it in front of the vehicle?
+	Vector vecDelta;
+	VectorSubtract( pEntity->WorldSpaceCenter(), vecSrc, vecDelta );
+	if ( ( DotProduct( vecDelta, forward ) <= 0 ) || pEntity->IsPlayer() )
+	{
+		BaseClass::VPhysicsCollision( index, pEvent );
+		return;
+	}
+
+	// Call our parents base class.
+	BaseClass::BaseClass::VPhysicsCollision( index, pEvent );
+
+	// Do damage based on velocity (and only if we were heading forward)
+	Vector vecVelocity = pEvent->preVelocity[index];
+	if (DotProduct( vecVelocity, forward ) <= 0)
+		return;
+
+	CTakeDamageInfo info;
+	info.SetInflictor( this );
+	info.SetAttacker( GetDriverPlayer() );
+	info.SetDamageType( DMG_CLUB );
+
+	float flMaxDamage = vehicle_battering_ram_damage.GetFloat();
+	float flMaxDamageVel = vehicle_battering_ram_maxdamagevel.GetFloat();
+	float flMinDamageVel = vehicle_battering_ram_mindamagevel.GetFloat();
+
+	float flVel = vecVelocity.Length();
+	if (flVel < flMinDamageVel)
+		return;
+
+	// FIXME: Play a sound here...
+	EmitSound( "VehicleBatteringRam.BashSound" );
+
+	// Apply the damage
+	float flDamageFactor = flMaxDamage;
+	if ( IsBoosting() )
+	{
+		flDamageFactor *= vehicle_battering_ram_damage_boostmod.GetFloat();
+	}
+
+	if ((flMaxDamageVel > flMinDamageVel) && (flVel < flMaxDamageVel))
+	{
+		// Use less damage when we're not moving fast enough
+		float flVelocityFactor = (flVel - flMinDamageVel) / (flMaxDamageVel - flMinDamageVel);
+		flVelocityFactor *= flVelocityFactor;
+		flDamageFactor *= flVelocityFactor;
+	}
+
+	UTIL_ScreenShakeObject( pEntity, vecSrc, 45.0f * flDamageFactor / flMaxDamage, 30.0f, 0.5f, 250.0f, SHAKE_START );
+
+	info.SetDamage( flDamageFactor );
+
+	Vector damagePos;
+	pEvent->pInternalData->GetContactPoint( damagePos );
+	Vector damageForce = pEvent->postVelocity[index] * pEvent->pObjects[index]->GetMass();
+	info.SetDamageForce( damageForce );
+	info.SetDamagePosition( damagePos );
+
+	PhysCallbackDamage( pEntity, info, *pEvent, index );
+
+	// Set next time ram time
+	m_flNextBashTime = gpGlobals->curtime + vehicle_battering_ram_impact_time.GetFloat();
+}
+
+//-----------------------------------------------------------------------------
+// Here's where we deal with weapons, ladders, etc.
+//-----------------------------------------------------------------------------
+void CVehicleBatteringRam::OnItemPostFrame( CBaseTFPlayer *pDriver )
+{
+	// I can't do anything if I'm not active
+	if ( !ShouldBeActive() )
+		return;
+
+	if ( GetPassengerRole( pDriver ) != VEHICLE_ROLE_DRIVER )
+		return;
+
+	if ( pDriver->m_nButtons & (IN_ATTACK2 | IN_SPEED) )
+	{
+		StartBoost();
+	}
+
+	BaseClass::OnItemPostFrame( pDriver );
+}