vector3d.cpp

3D游戏展示程序

//--------------------------------------------------
//  Desc: 3D Vector
//  Author: artsylee/2007.4.2
//--------------------------------------------------

#include "Vector3D.h"

Vector3D::Vector3D()
{
	x = 0.0f;
	y = 0.0f;
	z = 0.0f;
}

Vector3D::Vector3D(const Vector3D &v)
{
	x = v.x;
	y = v.y;
	z = v.z;
}

Vector3D::Vector3D(float fx, float fy, float fz)
{ 
	x = fx; 
	y = fy; 
	z = fz;		
}

__forceinline Vector3D Vector3D::operator+(const Vector3D &v) const
{ 
	return Vector3D(x + v.x, y + v.y, z + v.z);	
}

__forceinline Vector3D Vector3D::operator-(const Vector3D &v) const
{ 
	return Vector3D(x - v.x, y - v.y, z - v.z);	
}

__forceinline Vector3D Vector3D::operator*(float scale) const
{ 
	return Vector3D(x*scale, y*scale, z*scale);	
}

__forceinline Vector3D Vector3D::operator/(float scale) const
{
	return Vector3D(x/scale, y/scale, z/scale);
}

__forceinline float Vector3D::operator*(const Vector3D &v) const
{
	return x*v.x + y*v.y + z*v.z;
}

__forceinline Vector3D Vector3D::operator%(const Vector3D &v) const
{
	return Vector3D(y*v.z-z*v.y, z*v.x-x*v.z, x*v.y-y*v.x);
}

__forceinline Vector3D& Vector3D::operator=(const Vector3D &v)
{ 
	x = v.x; 
	y = v.y; 
	z = v.z; 
	return *this;	
}

__forceinline Vector3D&	Vector3D::operator+=(const Vector3D &v)
{
	x += v.x;
	y += v.y;
	z += v.z;
	return *this;
}

__forceinline Vector3D&	Vector3D::operator-=(const Vector3D &v)
{
	x -= v.x;
	y -= v.y;
	z -= v.z;
	return *this;
}

__forceinline Vector3D& Vector3D::operator*=(float scale)
{
	x *= scale;
	y *= scale;
	z *= scale;
	return *this;
}

__forceinline float Vector3D::LengthSquared() const
{
	return x*x + y*y + z*z;
}

__forceinline float Vector3D::Length() const
{
	return sqrtf(x*x + y*y + z*z);
}

__forceinline Vector3D&	Vector3D::Normalize()
{
	this->operator *= (1.0f/Length());
	return *this;
}

__forceinline Vector3D Vector3D::operator~() const
{
	Vector3D r(*this);
	r.Normalize();
	return r;
}