71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
//========= Copyright 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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} |