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#include "RayVector.h"
#include <math.h>
namespace igraph {
Vector::Vector()
{
mI = mJ = mK = 0.0;
}
Vector::Vector(const Point& vStartPoint, const Point& vEndPoint)
{
mI = vEndPoint.X() - vStartPoint.X();
mJ = vEndPoint.Y() - vStartPoint.Y();
mK = vEndPoint.Z() - vStartPoint.Z();
}
Vector::Vector(double vI, double vJ, double vK)
{
mI = vI;
mJ = vJ;
mK = vK;
}
Vector::~Vector()
{}
// returns a unit vector of this vector
Vector Vector::Normalize() const
{
double magnitude = Magnitude();
return Vector(mI/magnitude, mJ/magnitude, mK/magnitude);
}
void Vector::NormalizeThis()
{
*this = Normalize();
}
void Vector::ReverseDirection()
{
*this = *this * -1.0;
}
bool Vector::IsSameDirection(const Vector& rVector) const
{
return ( this->Normalize().Dot(rVector.Normalize()) > 0.0 );
}
void Vector::I(double vI)
{
mI = vI;
}
double Vector::I() const
{
return mI;
}
void Vector::J(double vJ)
{
mJ = vJ;
}
double Vector::J() const
{
return mJ;
}
void Vector::K(double vK)
{
mK = vK;
}
double Vector::K() const
{
return mK;
}
// returns the dot product of this and rVector
double Vector::Dot(const Vector& rVector) const
{
return mI*rVector.I() + mJ*rVector.J() + mK*rVector.K();
}
// returns the cross product of this and vVector
Vector Vector::Cross(const Vector& rVector) const
{
return Vector(mJ*rVector.K() - rVector.J()*mK, -1.0*(mI*rVector.K() - rVector.I()*mK), mI*rVector.J() - rVector.I()*mJ);
}
// returns the sum of this vector with another vector
Vector Vector::operator+ (Vector vRhs) const
{
return Vector(mI + vRhs.I(), mJ + vRhs.J(), mK + vRhs.K());
}
// returns the sume of a vector and a Point
Point Vector::operator+ (Point vRhs) const
{
return Point(mI + vRhs.X(), mJ + vRhs.Y(), mK + vRhs.Z());
}
// returns the difference of two vectors
Vector Vector::operator- (Vector vRhs) const
{
return Vector(mI-vRhs.I(), mJ-vRhs.J(), mK-vRhs.K());
}
// returns multiplication of a scalar with this vector
Vector Vector::operator* (double vRhs) const
{
return Vector(mI*vRhs, mJ*vRhs, mK*vRhs);
}
// converts this vector to a point
Point Vector::ToPoint() const
{
return Point(mI,mJ,mK);
}
// returns the magnitude
double Vector::Magnitude() const
{
return sqrt(mI*mI + mJ*mJ + mK*mK);
}
} // namespace igraph
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