quaternion.h

3D游戏展示程序

//--------------------------------------------------
//  Desc: quaternion
//  Date: 2007.4.2 /update
//  Author: artsylee
//
//  Copyright (C) 2007 artsylee
//
//--------------------------------------------------

#ifndef _QUATERNION_
#define _QUATERNION_

#include "Vector3D.h"

class Vector4D
{
public:
	float	x;
	float	y;
	float	z;
	float	w;

	Vector4D();	
	Vector4D(float fx, float fy, float fz, float fw);							
	Vector4D(const Vector4D &v);
	Vector4D(const Vector3D &v, const float fw);

	Vector4D	operator-(const Vector4D &v) const;
	Vector4D	operator+(const Vector4D &v) const;
	Vector4D	operator*(float scale) const;
	float		operator*(const Vector4D &v) const;

	Vector4D&   operator=(const Vector4D &v);
	Vector4D&	operator+=(const Vector4D &v);
	Vector4D&	operator-=(const Vector4D &v);
	Vector4D&	operator*=(float scale);

	float		LengthSquared() const;
	float		Length() const;
	Vector4D&	Normalize();
	operator	float*()	{	return (float*)this;	}
};

__forceinline Vector4D operator*(float d, const Vector4D& v)	{ v*d;	}
//__forceinline Vector4D operator*(const Vector4D& v, float d)	{ v*d;	}

class Quaternion : public Vector4D
{
public:
	Quaternion():Vector4D()	{}	
	Quaternion(float fx, float fy, float fz, float fw):Vector4D(fx, fy, fz, fw)	{}						
	Quaternion(const Vector4D &v):Vector4D(v)	{}
	Quaternion(const Vector3D &v, const float fw):Vector4D(v, fw)	{}
};

Quaternion Slerp(const float r, const Quaternion &v1, const Quaternion &v2);
Quaternion Lerp(const float r, const Quaternion &v1, const Quaternion &v2);

#endif // _QUATERNION_