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60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
/***
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*
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* Copyright (c) 1999, Valve LLC. All rights reserved.
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*
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* This product contains software technology licensed from Id
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* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
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* All Rights Reserved.
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*
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* Use, distribution, and modification of this source code and/or resulting
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* object code is restricted to non-commercial enhancements to products from
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* Valve LLC. All other use, distribution, or modification is prohibited
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* without written permission from Valve LLC.
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*
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****/
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#include "extdll.h"
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#include "plane.h"
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//=========================================================
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// Plane
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//=========================================================
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CPlane :: CPlane ( void )
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{
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m_fInitialized = FALSE;
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}
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//=========================================================
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// InitializePlane - Takes a normal for the plane and a
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// point on the plane and
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//=========================================================
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void CPlane :: InitializePlane ( const Vector &vecNormal, const Vector &vecPoint )
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{
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m_vecNormal = vecNormal;
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m_flDist = DotProduct ( m_vecNormal, vecPoint );
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m_fInitialized = TRUE;
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}
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//=========================================================
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// PointInFront - determines whether the given vector is
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// in front of the plane.
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//=========================================================
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BOOL CPlane :: PointInFront ( const Vector &vecPoint )
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{
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float flFace;
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if ( !m_fInitialized )
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{
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return FALSE;
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}
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flFace = DotProduct ( m_vecNormal, vecPoint ) - m_flDist;
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if ( flFace >= 0 )
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{
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return TRUE;
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}
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return FALSE;
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}
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