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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//===========================================================================//
#include "cbase.h"
#include "func_areaportalbase.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
// A sphere around the player used for backface culling of areaportals.
#define VIEWER_PADDING 80
CUtlLinkedList<CFuncAreaPortalBase*, unsigned short> g_AreaPortals;
//---------------------------------------------------------
// Save/Restore
//---------------------------------------------------------
BEGIN_DATADESC( CFuncAreaPortalBase )
DEFINE_FIELD( m_portalNumber, FIELD_INTEGER ),
DEFINE_KEYFIELD( m_iPortalVersion, FIELD_INTEGER, "PortalVersion" )
// DEFINE_FIELD( m_AreaPortalsElement, FIELD_SHORT ),
END_DATADESC()
CFuncAreaPortalBase::CFuncAreaPortalBase()
{
m_portalNumber = -1;
m_AreaPortalsElement = g_AreaPortals.AddToTail( this );
m_iPortalVersion = 0;
}
CFuncAreaPortalBase::~CFuncAreaPortalBase()
{
g_AreaPortals.Remove( m_AreaPortalsElement );
}
bool CFuncAreaPortalBase::UpdateVisibility( const Vector &vOrigin, float fovDistanceAdjustFactor, bool &bIsOpenOnClient )
{
// NOTE: We leave bIsOpenOnClient alone on purpose here. See the header for a description of why.
if( m_portalNumber == -1 )
return false;
// See if the viewer is on the backside.
VPlane plane;
if( !engine->GetAreaPortalPlane( vOrigin, m_portalNumber, &plane ) )
return true; // leave it open if there's an error here for some reason
bool bOpen = false;
if( plane.DistTo( vOrigin ) + VIEWER_PADDING > 0 )
bOpen = true;
return bOpen;
}
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