mirror of
https://github.com/unknownworlds/NS.git
synced 2024-11-15 09:11:55 +00:00
ad7db200f6
git-svn-id: https://unknownworlds.svn.cloudforge.com/ns1@280 67975925-1194-0748-b3d5-c16f83f1a3a1
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/***
|
|
*
|
|
* Copyright (c) 1999, Valve LLC. All rights reserved.
|
|
*
|
|
* This product contains software technology licensed from Id
|
|
* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* Use, distribution, and modification of this source code and/or resulting
|
|
* object code is restricted to non-commercial enhancements to products from
|
|
* Valve LLC. All other use, distribution, or modification is prohibited
|
|
* without written permission from Valve LLC.
|
|
*
|
|
****/
|
|
#include "extdll.h"
|
|
#include "plane.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;
|
|
}
|
|
|