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59 lines
1.5 KiB
59 lines
1.5 KiB
/*** |
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* |
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* Copyright (c) 1996-2002, 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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