www.pudn.com > zfxcengine-0.1.0.zip > cePlane4f.cpp

///////////////////////////////////////////////////////////////////////// 
//  Module:    Input 
//! \file      cePlane4f 
//! \brief     PLane definition in parameter form (float) 
//! \author    Kim Kulling aka kimmi 
// 
// Licence : LGPL 
///////////////////////////////////////////////////////////////////////// 
#include "Math/ceMath.h" 
#include  
#include  
 
namespace ZFXCE { 
	//------------------------------------------------------------------------------ 
 
	using namespace std; 
	//------------------------------------------------------------------------------ 
	cePlane4f::cePlane4f() : m_fA(0), m_fB(0), m_fC(0), m_fD(0) 
	{ 
		// empty  
	} 
	//------------------------------------------------------------------------------ 
	cePlane4f::cePlane4f(const FLOAT a, const FLOAT b, const FLOAT c, const FLOAT d) 
	: m_fA(a), m_fB(b), m_fC(c), m_fD(d) 
	{ 
		// empty 
	} 
	//------------------------------------------------------------------------------ 
	void cePlane4f::NormalizePlane() 
	{ 
		const FLOAT fMag =1 /  sqrt(m_fA * m_fA + m_fB * m_fB + m_fC * m_fC + m_fD * m_fD); 
		m_fA *= fMag; 
		m_fB *= fMag; 
		m_fC *= fMag; 
		m_fD *= fMag; 
	} 
	//------------------------------------------------------------------------------ 
	ceHalfSpace cePlane4f::ClassifyPoint(ceVec3f &Vertices) 
	{ 
		const FLOAT d = m_fA * Vertices[0] + m_fB * Vertices[1] + m_fC * m_fC + m_fD; 
		if (d < 0)  
			return PLANE_NEGATIVE; 
		if (d > 0)  
			return PLANE_POSITIVE; 
			 
		return PLANE_ONPLANE; 
	} 
	//------------------------------------------------------------------------------ 
} // Namespace ZFXCE