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Vector4.hpp
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Vector4.hpp
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//----------------------------------------------------------------------------------------------------
#ifndef _VECTOR4_HPP_94B290F0D3154FABA6049C3E1991F6BD
#define _VECTOR4_HPP_94B290F0D3154FABA6049C3E1991F6BD
//----------------------------------------------------------------------------------------------------
#include <cassert>
#include <cstddef>
#include <cmath>
#include "Float.hpp"
#include "Vector4_fwd.hpp"
//----------------------------------------------------------------------------------------------------
namespace MD2View
{
//----------------------------------------------------------------------------------------------------
template<typename T> class Vector4
{
protected:
T vec[4]; // xyzv
public:
typedef T scalar_type;
Vector4() noexcept
{
vec[0] = vec[1] = vec[2] = vec[3] = static_cast<T>(0.0);
}
Vector4(const Vector4<T>& v) noexcept
{
vec[0] = v.vec[0];
vec[1] = v.vec[1];
vec[2] = v.vec[2];
vec[3] = v.vec[3];
}
Vector4(T x, T y, T z, T v) noexcept
{
vec[0] = x;
vec[1] = y;
vec[2] = z;
vec[3] = v;
}
const T& operator[](std::size_t i) const noexcept
{
return vec[i];
}
T& operator[](std::size_t i) noexcept
{
return vec[i];
}
bool operator==(const Vector4<T>& v) const noexcept
{
return
v.vec[0] == vec[0]
&& v.vec[1] == vec[1]
&& v.vec[2] == vec[2]
&& v.vec[3] == vec[3];
}
Vector4<T>& inc(const Vector4<T>& v) noexcept
{
vec[0] += v.vec[0];
vec[1] += v.vec[1];
vec[2] += v.vec[2];
vec[3] += v.vec[3];
return *this;
}
Vector4<T>& inc(const Vector4<T>& v, T scale) noexcept
{
vec[0] += scale * v.vec[0];
vec[1] += scale * v.vec[1];
vec[2] += scale * v.vec[2];
vec[3] += scale * v.vec[3];
return *this;
}
Vector4<T>& dec(const Vector4<T>& v) noexcept
{
vec[0] -= v.vec[0];
vec[1] -= v.vec[1];
vec[2] -= v.vec[2];
vec[3] -= v.vec[3];
return *this;
}
Vector4<T>& neg() noexcept
{
vec[0] = -vec[0];
vec[1] = -vec[1];
vec[2] = -vec[2];
vec[3] = -vec[3];
return *this;
}
Vector4<T>& mul(T d) noexcept
{
vec[0] *= d;
vec[1] *= d;
vec[2] *= d;
vec[3] *= d;
return *this;
}
Vector4<T>& div(T d) noexcept
{
vec[0] /= d;
vec[1] /= d;
vec[2] /= d;
vec[3] /= d;
return *this;
}
Vector4<T>& normalize() noexcept
{
T d = len();
assert(d != static_cast<T>(0.0));
div(d);
return *this;
}
const T len2() const noexcept
{
return vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2] + vec[3] * vec[3];
}
const T len() const noexcept
{
return sqrt(len2());
}
Vector4<T>& len(T m) noexcept
{
return mul(m / len());
}
bool equals(const Vector4<T>& v) const noexcept
{
return
FloatEqual<T>(vec[0], v[0])
&& FloatEqual<T>(vec[1], v[1])
&& FloatEqual<T>(vec[2], v[2])
&& FloatEqual<T>(vec[3], v[3]);
}
bool equals(const Vector4<T>& v, T eps) const noexcept
{
return
FloatEqual<T>(vec[0], v[0], eps)
&& FloatEqual<T>(vec[1], v[1], eps)
&& FloatEqual<T>(vec[2], v[2], eps)
&& FloatEqual<T>(vec[3], v[3], eps);
}
static T dotProduct(const Vector4<T>& u, const Vector4<T>& v) noexcept
{
return
u.vec[0] * v.vec[0] + u.vec[1] * v.vec[1] +
u.vec[2] * v.vec[2] + u.vec[3] * v.vec[3];
}
static Vector4<T> crossProduct(const Vector4<T>& u, const Vector4<T>& v) noexcept
{
return Vector4(
u.vec[1] * v.vec[2] - u.vec[2] * v.vec[1],
u.vec[2] * v.vec[0] - u.vec[0] * v.vec[2],
u.vec[0] * v.vec[1] - u.vec[1] * v.vec[0]);
}
};
//----------------------------------------------------------------------------------------------------
} // namespace MD2View
//----------------------------------------------------------------------------------------------------
#endif // _VECTOR4_HPP_94B290F0D3154FABA6049C3E1991F6BD
//----------------------------------------------------------------------------------------------------