From 39ed87570bdb2f86969d4be821c94b722dc71179 Mon Sep 17 00:00:00 2001
From: Joe Ludwig <joe@valvesoftware.com>
Date: Wed, 26 Jun 2013 15:22:04 -0700
Subject: First version of the SOurce SDK 2013

---
 mp/src/game/server/cplane.cpp | 71 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 mp/src/game/server/cplane.cpp

(limited to 'mp/src/game/server/cplane.cpp')

diff --git a/mp/src/game/server/cplane.cpp b/mp/src/game/server/cplane.cpp
new file mode 100644
index 00000000..e7d7d35e
--- /dev/null
+++ b/mp/src/game/server/cplane.cpp
@@ -0,0 +1,71 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "game.h"
+#include "cplane.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+//=========================================================
+// Plane
+//=========================================================
+CPlane::CPlane ( void )
+{
+	m_fInitialized = FALSE;
+}
+
+//=========================================================
+// InitializePlane - Takes a normal for the plane and a
+// point on the plane and 
+//=========================================================
+void CPlane::InitializePlane ( const Vector &vecNormal, const Vector &vecPoint )
+{
+	m_vecNormal = vecNormal;
+	m_flDist = DotProduct ( m_vecNormal, vecPoint );
+	m_fInitialized = TRUE;
+}
+
+
+//=========================================================
+// PointInFront - determines whether the given vector is 
+// in front of the plane. 
+//=========================================================
+bool CPlane::PointInFront ( const Vector &vecPoint )
+{
+	float flFace;
+
+	if ( !m_fInitialized )
+	{
+		return FALSE;
+	}
+
+	flFace = DotProduct ( m_vecNormal, vecPoint ) - m_flDist;
+
+	if ( flFace >= 0 )
+	{
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+//=========================================================
+//=========================================================
+float CPlane::PointDist ( const Vector &vecPoint )
+{
+	float flDist;
+
+	if ( !m_fInitialized )
+	{
+		return FALSE;
+	}
+
+	flDist = DotProduct ( m_vecNormal, vecPoint ) - m_flDist;
+
+	return flDist;
+}
\ No newline at end of file
-- 
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