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game/server/func_areaportalbase.cpp

@@ -0,0 +1,71 @@
+//========= 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;
+}
+
+
+
+