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71 lines
1.6 KiB
71 lines
1.6 KiB
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $NoKeywords: $ |
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//=============================================================================// |
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#include "cbase.h" |
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#include "game.h" |
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#include "cplane.h" |
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// memdbgon must be the last include file in a .cpp file!!! |
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#include "tier0/memdbgon.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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//========================================================= |
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//========================================================= |
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float CPlane::PointDist ( const Vector &vecPoint ) |
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{ |
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float flDist; |
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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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flDist = DotProduct ( m_vecNormal, vecPoint ) - m_flDist; |
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return flDist; |
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}
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