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#ifndef STIM_VECTOR_H
#define STIM_VECTOR_H
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#include <iostream>
#include <cmath>
#include <sstream>
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#include <vector>
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#include <algorithm>
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#include <stim/cuda/cudatools/callable.h>
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#include <stim/math/vec3.h>
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namespace stim
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{
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template <class T>
struct vec : public std::vector<T>
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{
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using std::vector<T>::size;
using std::vector<T>::at;
using std::vector<T>::resize;
using std::vector<T>::push_back;
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vec(){
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}
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/// Create a vector with a set dimension d
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vec(size_t d)
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{
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resize(d,0);
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}
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// //efficiency constructors, makes construction easier for 1D-4D vectors
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vec(T x, T y)
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{
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resize(2, 0);
at(0) = x;
at(1) = y;
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}
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vec(T x, T y, T z)
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{
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resize(3, 0);
at(0) = x;
at(1) = y;
at(2) = z;
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}
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vec(T x, T y, T z, T w)
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{
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resize(4, 0);
at(0) = x;
at(1) = y;
at(2) = z;
at(3) = w;
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}
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vec(std::string str){
std::stringstream ss(str);
T c;
while(ss >> c){
push_back(c);
}
}
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//copy constructor
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vec( const vec<T>& other){
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size_t N = other.size();
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resize(N); //resize the current vector to match the copy
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for(size_t i=0; i<N; i++){ //copy each element
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at(i) = other[i];
}
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}
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// vec( vec3<T>& other){
// resize(3); //resize the current vector to match the copy
// for(size_t i=0; i<3; i++){ //copy each element
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// at(i) = other[i];
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// }
// }
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//I'm not sure what these were doing here.
//Keep them now, we'll worry about it later.
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vec<T> push(T x)
{
push_back(x);
return *this;
}
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vec<T> push(T x, T y)
{
push_back(x);
push_back(y);
return *this;
}
vec<T> push(T x, T y, T z)
{
push_back(x);
push_back(y);
push_back(z);
return *this;
}
vec<T> push(T x, T y, T z, T w)
{
push_back(x);
push_back(y);
push_back(z);
push_back(w);
return *this;
}
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/// Casting operator. Creates a new vector with a new type U.
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template< typename U >
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operator vec<U>(){
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size_t N = size();
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vec<U> result;
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for(int i=0; i<N; i++)
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result.push_back(at(i));
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return result;
}
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/// computes the Euclidean length of the vector
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T len() const
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size_t N = size();
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//compute and return the vector length
T sum_sq = (T)0;
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{
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sum_sq += pow( at(i), 2 );
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}
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return sqrt(sum_sq);
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}
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vec<T> cyl2cart() const
{
vec<T> cyl;
cyl.push_back(at(0)*std::sin(at(1)));
cyl.push_back(at(0)*std::cos(at(1)));
cyl.push_back(at(2));
return(cyl);
}
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/// Convert the vector from cartesian to spherical coordinates (x, y, z -> r, theta, phi where theta = [0, 2*pi])
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vec<T> cart2sph() const
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vec<T> sph;
sph.push_back(std::sqrt(at(0)*at(0) + at(1)*at(1) + at(2)*at(2)));
sph.push_back(std::atan2(at(1), at(0)));
if(sph[0] == 0)
sph.push_back(0);
else
sph.push_back(std::acos(at(2) / sph[0]));
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return sph;
}
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/// Convert the vector from cartesian to spherical coordinates (r, theta, phi -> x, y, z where theta = [0, 2*pi])
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vec<T> sph2cart() const
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{
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vec<T> cart;
cart.push_back(at(0) * std::cos(at(1)) * std::sin(at(2)));
cart.push_back(at(0) * std::sin(at(1)) * std::sin(at(2)));
cart.push_back(at(0) * std::cos(at(2)));
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return cart;
}
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/// Computes the normalized vector (where each coordinate is divided by the L2 norm)
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vec<T> norm() const
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size_t N = size();
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//compute and return the unit vector
vec<T> result;
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//compute the vector length
T l = len();
//normalize
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for(size_t i=0; i<N; i++)
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{
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result.push_back(at(i) / l);
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}
return result;
}
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/// Computes the cross product of a 3-dimensional vector
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vec<T> cross(const vec<T> rhs) const
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{
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vec<T> result(3);
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//compute the cross product (only valid for 3D vectors)
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result[0] = (at(1) * rhs[2] - at(2) * rhs[1]);
result[1] = (at(2) * rhs[0] - at(0) * rhs[2]);
result[2] = (at(0) * rhs[1] - at(1) * rhs[0]);
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return result;
}
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/// Compute the Euclidean inner (dot) product
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T dot(vec<T> rhs) const
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{
T result = (T)0;
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size_t N = size();
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for(int i=0; i<N; i++)
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result += at(i) * rhs[i];
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return result;
}
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/// Arithmetic addition operator
/// @param rhs is the right-hand-side operator for the addition
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vec<T> operator+(vec<T> rhs) const
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{
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size_t N = size();
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vec<T> result(N);
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result[i] = at(i) + rhs[i];
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return result;
}
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/// Arithmetic addition to a scalar
/// @param rhs is the right-hand-side operator for the addition
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vec<T> operator+(T rhs) const
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size_t N = size();
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vec<T> result(N);
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result[i] = at(i) + rhs;
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return result;
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}
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/// Arithmetic subtraction operator
/// @param rhs is the right-hand-side operator for the subtraction
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vec<T> operator-(vec<T> rhs) const
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{
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size_t N = size();
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vec<T> result(N);
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for(size_t i=0; i<N; i++)
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result[i] = at(i) - rhs[i];
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return result;
}
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/// Arithmetic subtraction to a scalar
/// @param rhs is the right-hand-side operator for the addition
vec<T> operator-(T rhs) const
{
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size_t N = size();
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vec<T> result(N);
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for(size_t i=0; i<N; i++)
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result[i] = at(i) - rhs;
return result;
}
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/// Arithmetic scalar multiplication operator
/// @param rhs is the right-hand-side operator for the subtraction
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vec<T> operator*(T rhs) const
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{
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size_t N = size();
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vec<T> result(N);
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for(size_t i=0; i<N; i++)
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result[i] = at(i) * rhs;
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return result;
}
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/// Arithmetic scalar division operator
/// @param rhs is the right-hand-side operator for the subtraction
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vec<T> operator/(T rhs) const
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{
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size_t N = size();
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vec<T> result(N);
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result[i] = at(i) / rhs;
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return result;
}
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/// Multiplication by a scalar, followed by assignment
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vec<T> operator*=(T rhs){
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size_t N = size();
for(size_t i=0; i<N; i++)
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at(i) = at(i) * rhs;
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return *this;
}
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/// Addition and assignment
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vec<T> operator+=(vec<T> rhs){
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size_t N = size();
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at(i) += rhs[i];
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return *this;
}
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/// Assign a scalar to all values
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vec<T> & operator=(T rhs){
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size_t N = size();
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at(i) = rhs;
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return *this;
}
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/// Cast to a vec3
operator stim::vec3<T>(){
stim::vec3<T> r;
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size_t N = std::min(size(), (size_t)3);
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for(size_t i = 0; i < N; i++)
r[i] = at(i);
return r;
}
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/// Casting and assignment
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template<typename Y>
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vec<T> & operator=(vec<Y> rhs){
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size_t N = rhs.size();
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resize(N);
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for(size_t i=0; i<N; i++)
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at(i) = rhs[i];
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return *this;
}
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/// Assign a vec = vec3
template<typename Y>
vec<T> & operator=(vec3<Y> rhs)
{
resize(3);
for(size_t i=0; i<3; i++)
at(i) = rhs[i];
return *this;
}
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/// Unary minus (returns the negative of the vector)
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vec<T> operator-() const{
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size_t N = size();
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vec<T> r(N);
//negate the vector
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for(size_t i=0; i<N; i++)
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r[i] = -at(i);
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return r;
}
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/// Outputs the vector as a string
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std::string str() const
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{
std::stringstream ss;
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size_t N = size();
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ss<<"[";
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for(size_t i=0; i<N; i++)
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{
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ss<<at(i);
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if(i != N-1)
ss<<", ";
}
ss<<"]";
return ss.str();
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};
} //end namespace rts
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template <typename T>
std::ostream& operator<<(std::ostream& os, stim::vec<T> v)
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{
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os<<v.str();
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return os;
}
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/// Multiply a vector by a constant when the vector is on the right hand side
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template <typename T>
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stim::vec<T> operator*(T lhs, stim::vec<T> rhs)
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{
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stim::vec<T> r;
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return rhs * lhs;
}
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#endif
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