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vector3.cpp
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vector3.cpp
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#include "vector3.hpp"
#include "common.hpp"
#include <cmath>
using strangeloop::Vector3;
Vector3::Vector3()
:_buffer{0,0,0}
{
}
Vector3::Vector3(double x, double y, double z)
:_buffer{x,y,z}
{
}
Vector3::Vector3(Vector3 &vec)
{
_buffer[0] = vec[0];
_buffer[1] = vec[1];
_buffer[2] = vec[2];
}
Vector3::Vector3(const Vector3 &vec)
{
_buffer[0] = vec[0];
_buffer[1] = vec[1];
_buffer[2] = vec[2];
}
double Vector3::operator[](int i) const
{
return _buffer[i];
}
//void Vector3::operator=(const Vector3 &vec)
//{
// _buffer[0] = vec[0];
// _buffer[1] = vec[1];
// _buffer[2] = vec[2];
//}
Vector3& Vector3::operator+=(const Vector3 &vec)
{
_buffer[0] += vec[0];
_buffer[1] += vec[1];
_buffer[2] += vec[2];
return *this;
}
Vector3 &Vector3::operator*=(const Vector3 &vec)
{
_buffer[0] *= vec[0];
_buffer[1] *= vec[1];
_buffer[2] *= vec[2];
return *this;
}
Vector3 &Vector3::operator-=(const Vector3 &vec)
{
_buffer[0] -= vec[0];
_buffer[1] -= vec[1];
_buffer[2] -= vec[2];
return *this;
}
Vector3 &Vector3::operator/=(const double t)
{
_buffer[0] /= t;
_buffer[1] /= t;
_buffer[2] /= t;
return *this;
}
Vector3 Vector3::random()
{
return Vector3(strangeloop::randomDouble(0,1),strangeloop::randomDouble(0,1),strangeloop::randomDouble(0,1));
}
double& Vector3::operator[](int i)
{
return _buffer[i];
}
double Vector3::length() const
{
return std::sqrt(length_squared());
}
double Vector3::length_squared() const
{
return _buffer[0]*_buffer[0] + _buffer[1]*_buffer[1] + _buffer[2]*_buffer[2];
}
bool Vector3::nearZero() const
{
const auto s = 1e-8;
return ((fabs(_buffer[0]) < s) && (fabs(_buffer[1]) < s) && (fabs(_buffer[2]) < s));
}