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game/server/tf/trigger_passtime_ball.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "tf_passtime_ball.h"
+#include "tf_passtime_logic.h"
+#include "trigger_passtime_ball.h"
+#include "tf_player.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+//----------------------------------------------------------------------
+LINK_ENTITY_TO_CLASS( trigger_passtime_ball, CTriggerPasstimeBall );
+
+//-----------------------------------------------------------------------------
+BEGIN_DATADESC( CTriggerPasstimeBall )
+	DEFINE_OUTPUT( m_onBallEnter, "OnBallEnter" ),
+	DEFINE_OUTPUT( m_onBallExit, "OnBallExit" ),
+END_DATADESC()
+
+//-----------------------------------------------------------------------------
+void CTriggerPasstimeBall::Spawn()
+{
+	m_bPresent = false;
+	BaseClass::Spawn();
+
+	SetSolid( SOLID_BSP );	
+	AddSolidFlags( FSOLID_NOT_SOLID | FSOLID_TRIGGER );
+	SetMoveType( MOVETYPE_NONE );
+	SetModel( STRING( GetModelName() ) );    // set size and link into world
+	AddEffects( EF_NODRAW );
+
+	SetThink( &CTriggerPasstimeBall::Update );
+	SetNextThink( gpGlobals->curtime );
+}
+
+//-----------------------------------------------------------------------------
+static CBaseEntity *s_EntitiesInSphere[32];
+bool CTriggerPasstimeBall::BTouching( CBaseEntity *pEnt )
+{
+	Ray_t ray;
+	trace_t tr;
+	ICollideable *pCollide = CollisionProp();
+	ray.Init( pEnt->GetAbsOrigin(), pEnt->GetAbsOrigin() );
+	enginetrace->ClipRayToCollideable( ray, MASK_ALL, pCollide, &tr );
+	return ( tr.startsolid );
+}
+
+//-----------------------------------------------------------------------------
+void CTriggerPasstimeBall::Update()
+{
+	// This is a crappy way to do this, but I couldn't find any way to make
+	// a normal trigger do what I want because I want enter/exit to be handled
+	// correctly when the ball is hidden.
+	// It would be more efficient to have the ball do this, but I'm 
+	// trying to isolate this hack to where it makes the most sense.
+
+	SetNextThink( gpGlobals->curtime );
+	
+	if ( !g_pPasstimeLogic || !g_pPasstimeLogic->GetBall() )
+		return;
+
+	CPasstimeBall *pBall = g_pPasstimeLogic->GetBall();
+	CBaseEntity *pEnt = pBall->GetCarrier();
+	if ( !pEnt ) pEnt = pBall;
+
+	bool bPresentNow = (pEnt && BTouching( pEnt ));
+	if ( bPresentNow && !m_bPresent )
+	{
+		m_onBallEnter.FireOutput( this, this );
+	}
+	else if ( !bPresentNow && m_bPresent )
+	{
+		m_onBallExit.FireOutput( this, this );
+	}
+	m_bPresent = bPresentNow;
+}