ebb721c7
 David Mayerich
new repository fo...
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///This class is used to store information for a 3D vector.
#include <iostream>
#include <math.h>
using namespace std;
#ifndef RTSVECTOR3D_H
#define RTSVECTOR3D_H
template <class T> class vector3D
{
//friend class point3D<T>;
public:
//data values
T x;
T y;
T z;
vector3D(); ///<Constructor. The resulting vector is initialized to (0,0,0)
vector3D(T new_x, T new_y, T new_z); ///<Constructor. Initialize the resulting vector to the value specified by (new_x, new_y, new_z)
//operators
vector3D<T> operator+(vector3D<T> param); ///<Used for vector arithmetic. Allows two vectors with similar types to be added.
vector3D<T> operator-(vector3D<T> param); ///<Used for vector arithmetic. Allows two vectors with similar types to be subtracted.
T operator*(vector3D<T> param); ///<Used for vector arithmetic. Computes the inner product of two vectors of the same type.
vector3D<T> operator*(T param); ///<Used for vector arithmetic. Multiplies a vector by a scalar value of type T.
vector3D<T> X(vector3D<T> param); ///<Compute the cross product between two vectors
friend vector3D<T> operator*(const T lhs, vector3D<T> rhs){return rhs*lhs;} ///<Allows vectors to be multiplied by scalars in either order
//methods
vector3D<T> Times(vector3D<T> param); ///<Performs piecewise multiplication between two vectors [ex. (x1*x2, y1*y2, z1*z2)].
vector3D<T> Normalize(); ///<Returns the normalized version of the vector.
T Length(); ///<Returns the length of the vector.
//casting operators
template <class U> operator vector3D<U>(); ///<Casting operator allows explicit casting between vector types.
//output
friend ostream& operator<<(ostream& os, const vector3D<T> &rhs)
{
os<<"("<<rhs.x<<","<<rhs.y<<","<<rhs.z<<")";
return os;
}
void print();
};
template <class T>
template <class U>
vector3D<T>::operator vector3D<U>()
{
vector3D<U> cast_result(x, y, z);
return cast_result;
}
template <class T> vector3D<T>::vector3D()
{
x=0;
y=0;
z=0;
}
template <class T> vector3D<T>::vector3D(T new_x, T new_y, T new_z)
{
x=new_x;
y=new_y;
z=new_z;
}
template <class T>
vector3D<T> vector3D<T>::operator -(vector3D<T> param)
{
vector3D<T> result; //create the result
result.x = x-param.x; //perform the computation
result.y = y-param.y;
result.z = z-param.z;
return result;
}
template <class T>
vector3D<T> vector3D<T>::operator+(vector3D<T> param)
{
vector3D<T> result; //create the result
result.x = x+param.x; //perform the computation
result.y = y+param.y;
result.z = z+param.z;
return result;
}
template <class T>
vector3D<T> vector3D<T>::Times(vector3D<T> param)
{
vector3D<T> result; //create the result
result.x = x*param.x; //perform the computation
result.y = y*param.y;
result.z = z*param.z;
return result;
}
template <class T>
vector3D<T> vector3D<T>::operator*(T param)
{
vector3D<T> result; //create the result
result.x = x*param; //perform the computation
result.y = y*param;
result.z = z*param;
return result;
}
template <class T>
T vector3D<T>::operator *(vector3D<T> param)
{
//This function computes the dot product between two vectors
return x*param.x + y*param.y + z*param.z;
}
template <class T>
vector3D<T> vector3D<T>::X(vector3D<T> param)
{
vector3D<T> result;
result.x=y*param.z - z*param.y;
result.y=z*param.x - x*param.z;
result.z=x*param.y - y*param.x;
return result;
}
template <class T>
vector3D<T> vector3D<T>::Normalize()
{
T length = Length();
if(length ==0.0)
{
x = y = z = 0;
}
else
{
x/= length;
y /=length;
z /=length;
}
return *this;
}
template <class T>
T vector3D<T>::Length()
{
return sqrt(x*x + y*y + z*z);
}
template <class T>
void vector3D<T>::print()
{
cout<<"["<<x<<","<<y<<","<<z<<"]"<<endl;
}
#endif
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