71 lines
No EOL
1.6 KiB
C++
71 lines
No EOL
1.6 KiB
C++
//========= 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;
|
|
} |