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eden/src/common/vector_math.h
Gamer64 8cfcf1e8bf
[vector_math]: Use NEON intrinsics in Vec4 dot operation (#177) 
PabloMK7: Changes the Vec4 dot operation to use NEON intrinsics on ARM devices.
This function is used every time a triangle is added to the rendered, so it can be considered hot code. The other vector operations are not used as much, so there is no gain to provide NEON operations for them.

The improvements from this change are most likely minimal.

Co-authored-by: PabloMK7 <hackyglitch2@gmail.com>
Co-authored-by: Gamer64 <76565986+Gamer64ytb@users.noreply.github.com>
Reviewed-on: eden-emu/eden#177
Co-authored-by: Gamer64 <gamer64@eden-emu.dev>
Co-committed-by: Gamer64 <gamer64@eden-emu.dev>
2025-08-02 01:48:04 +02:00

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// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2014 Tony Wasserka
// SPDX-FileCopyrightText: 2014 Dolphin Emulator Project
// SPDX-License-Identifier: BSD-3-Clause AND GPL-2.0-or-later
#pragma once
#ifdef __ARM_NEON
#include <arm_neon.h>
#endif
#include <cmath>
#include <type_traits>
namespace Common {
template <typename T>
class Vec2;
template <typename T>
class Vec3;
template <typename T>
class Vec4;
template <typename T>
class Vec2 {
public:
T x{};
T y{};
constexpr Vec2() = default;
constexpr Vec2(const T& x_, const T& y_) : x(x_), y(y_) {}
template <typename T2>
[[nodiscard]] constexpr Vec2<T2> Cast() const {
return Vec2<T2>(static_cast<T2>(x), static_cast<T2>(y));
}
[[nodiscard]] static constexpr Vec2 AssignToAll(const T& f) {
return Vec2{f, f};
}
[[nodiscard]] constexpr Vec2<decltype(T{} + T{})> operator+(const Vec2& other) const {
return {x + other.x, y + other.y};
}
constexpr Vec2& operator+=(const Vec2& other) {
x += other.x;
y += other.y;
return *this;
}
[[nodiscard]] constexpr Vec2<decltype(T{} - T{})> operator-(const Vec2& other) const {
return {x - other.x, y - other.y};
}
constexpr Vec2& operator-=(const Vec2& other) {
x -= other.x;
y -= other.y;
return *this;
}
template <typename U = T>
[[nodiscard]] constexpr Vec2<std::enable_if_t<std::is_signed_v<U>, U>> operator-() const {
return {-x, -y};
}
[[nodiscard]] constexpr Vec2<decltype(T{} * T{})> operator*(const Vec2& other) const {
return {x * other.x, y * other.y};
}
template <typename V>
[[nodiscard]] constexpr Vec2<decltype(T{} * V{})> operator*(const V& f) const {
using TV = decltype(T{} * V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) * static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec2& operator*=(const V& f) {
*this = *this * f;
return *this;
}
template <typename V>
[[nodiscard]] constexpr Vec2<decltype(T{} / V{})> operator/(const V& f) const {
using TV = decltype(T{} / V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) / static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec2& operator/=(const V& f) {
*this = *this / f;
return *this;
}
[[nodiscard]] constexpr T Length2() const {
return x * x + y * y;
}
// Only implemented for T=float
[[nodiscard]] float Length() const;
[[nodiscard]] float Normalize(); // returns the previous length, which is often useful
[[nodiscard]] constexpr T& operator[](std::size_t i) {
return *((&x) + i);
}
[[nodiscard]] constexpr const T& operator[](std::size_t i) const {
return *((&x) + i);
}
constexpr void SetZero() {
x = 0;
y = 0;
}
// Common aliases: UV (texel coordinates), ST (texture coordinates)
[[nodiscard]] constexpr T& u() {
return x;
}
[[nodiscard]] constexpr T& v() {
return y;
}
[[nodiscard]] constexpr T& s() {
return x;
}
[[nodiscard]] constexpr T& t() {
return y;
}
[[nodiscard]] constexpr const T& u() const {
return x;
}
[[nodiscard]] constexpr const T& v() const {
return y;
}
[[nodiscard]] constexpr const T& s() const {
return x;
}
[[nodiscard]] constexpr const T& t() const {
return y;
}
// swizzlers - create a subvector of specific components
[[nodiscard]] constexpr Vec2 yx() const {
return Vec2(y, x);
}
[[nodiscard]] constexpr Vec2 vu() const {
return Vec2(y, x);
}
[[nodiscard]] constexpr Vec2 ts() const {
return Vec2(y, x);
}
};
template <typename T, typename V>
[[nodiscard]] constexpr Vec2<T> operator*(const V& f, const Vec2<T>& vec) {
using C = std::common_type_t<T, V>;
return Vec2<T>(static_cast<T>(static_cast<C>(f) * static_cast<C>(vec.x)),
static_cast<T>(static_cast<C>(f) * static_cast<C>(vec.y)));
}
using Vec2f = Vec2<float>;
template <>
inline float Vec2<float>::Length() const {
return std::sqrt(x * x + y * y);
}
template <>
inline float Vec2<float>::Normalize() {
float length = Length();
*this /= length;
return length;
}
template <typename T>
class Vec3 {
public:
T x{};
T y{};
T z{};
constexpr Vec3() = default;
constexpr Vec3(const T& x_, const T& y_, const T& z_) : x(x_), y(y_), z(z_) {}
template <typename T2>
[[nodiscard]] constexpr Vec3<T2> Cast() const {
return Vec3<T2>(static_cast<T2>(x), static_cast<T2>(y), static_cast<T2>(z));
}
[[nodiscard]] static constexpr Vec3 AssignToAll(const T& f) {
return Vec3(f, f, f);
}
[[nodiscard]] constexpr Vec3<decltype(T{} + T{})> operator+(const Vec3& other) const {
return {x + other.x, y + other.y, z + other.z};
}
constexpr Vec3& operator+=(const Vec3& other) {
x += other.x;
y += other.y;
z += other.z;
return *this;
}
[[nodiscard]] constexpr Vec3<decltype(T{} - T{})> operator-(const Vec3& other) const {
return {x - other.x, y - other.y, z - other.z};
}
constexpr Vec3& operator-=(const Vec3& other) {
x -= other.x;
y -= other.y;
z -= other.z;
return *this;
}
template <typename U = T>
[[nodiscard]] constexpr Vec3<std::enable_if_t<std::is_signed_v<U>, U>> operator-() const {
return {-x, -y, -z};
}
[[nodiscard]] constexpr Vec3<decltype(T{} * T{})> operator*(const Vec3& other) const {
return {x * other.x, y * other.y, z * other.z};
}
template <typename V>
[[nodiscard]] constexpr Vec3<decltype(T{} * V{})> operator*(const V& f) const {
using TV = decltype(T{} * V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(z) * static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec3& operator*=(const V& f) {
*this = *this * f;
return *this;
}
template <typename V>
[[nodiscard]] constexpr Vec3<decltype(T{} / V{})> operator/(const V& f) const {
using TV = decltype(T{} / V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(z) / static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec3& operator/=(const V& f) {
*this = *this / f;
return *this;
}
void RotateFromOrigin(float roll, float pitch, float yaw) {
float temp = y;
y = std::cos(roll) * y - std::sin(roll) * z;
z = std::sin(roll) * temp + std::cos(roll) * z;
temp = x;
x = std::cos(pitch) * x + std::sin(pitch) * z;
z = -std::sin(pitch) * temp + std::cos(pitch) * z;
temp = x;
x = std::cos(yaw) * x - std::sin(yaw) * y;
y = std::sin(yaw) * temp + std::cos(yaw) * y;
}
[[nodiscard]] constexpr T Length2() const {
return x * x + y * y + z * z;
}
// Only implemented for T=float
[[nodiscard]] float Length() const;
[[nodiscard]] Vec3 Normalized() const;
[[nodiscard]] float Normalize(); // returns the previous length, which is often useful
[[nodiscard]] constexpr T& operator[](std::size_t i) {
return *((&x) + i);
}
[[nodiscard]] constexpr const T& operator[](std::size_t i) const {
return *((&x) + i);
}
constexpr void SetZero() {
x = 0;
y = 0;
z = 0;
}
// Common aliases: UVW (texel coordinates), RGB (colors), STQ (texture coordinates)
[[nodiscard]] constexpr T& u() {
return x;
}
[[nodiscard]] constexpr T& v() {
return y;
}
[[nodiscard]] constexpr T& w() {
return z;
}
[[nodiscard]] constexpr T& r() {
return x;
}
[[nodiscard]] constexpr T& g() {
return y;
}
[[nodiscard]] constexpr T& b() {
return z;
}
[[nodiscard]] constexpr T& s() {
return x;
}
[[nodiscard]] constexpr T& t() {
return y;
}
[[nodiscard]] constexpr T& q() {
return z;
}
[[nodiscard]] constexpr const T& u() const {
return x;
}
[[nodiscard]] constexpr const T& v() const {
return y;
}
[[nodiscard]] constexpr const T& w() const {
return z;
}
[[nodiscard]] constexpr const T& r() const {
return x;
}
[[nodiscard]] constexpr const T& g() const {
return y;
}
[[nodiscard]] constexpr const T& b() const {
return z;
}
[[nodiscard]] constexpr const T& s() const {
return x;
}
[[nodiscard]] constexpr const T& t() const {
return y;
}
[[nodiscard]] constexpr const T& q() const {
return z;
}
// swizzlers - create a subvector of specific components
// e.g. Vec2 uv() { return Vec2(x,y); }
// _DEFINE_SWIZZLER2 defines a single such function, DEFINE_SWIZZLER2 defines all of them for all
// component names (x<->r) and permutations (xy<->yx)
#define _DEFINE_SWIZZLER2(a, b, name) \
[[nodiscard]] constexpr Vec2<T> name() const { return Vec2<T>(a, b); }
#define DEFINE_SWIZZLER2(a, b, a2, b2, a3, b3, a4, b4) \
_DEFINE_SWIZZLER2(a, b, a##b); \
_DEFINE_SWIZZLER2(a, b, a2##b2); \
_DEFINE_SWIZZLER2(a, b, a3##b3); \
_DEFINE_SWIZZLER2(a, b, a4##b4); \
_DEFINE_SWIZZLER2(b, a, b##a); \
_DEFINE_SWIZZLER2(b, a, b2##a2); \
_DEFINE_SWIZZLER2(b, a, b3##a3); \
_DEFINE_SWIZZLER2(b, a, b4##a4)
DEFINE_SWIZZLER2(x, y, r, g, u, v, s, t);
DEFINE_SWIZZLER2(x, z, r, b, u, w, s, q);
DEFINE_SWIZZLER2(y, z, g, b, v, w, t, q);
#undef DEFINE_SWIZZLER2
#undef _DEFINE_SWIZZLER2
};
template <typename T, typename V>
[[nodiscard]] constexpr Vec3<T> operator*(const V& f, const Vec3<T>& vec) {
using C = std::common_type_t<T, V>;
return Vec3<T>(static_cast<T>(static_cast<C>(f) * static_cast<C>(vec.x)),
static_cast<T>(static_cast<C>(f) * static_cast<C>(vec.y)),
static_cast<T>(static_cast<C>(f) * static_cast<C>(vec.z)));
}
template <>
inline float Vec3<float>::Length() const {
return std::sqrt(x * x + y * y + z * z);
}
template <>
inline Vec3<float> Vec3<float>::Normalized() const {
return *this / Length();
}
template <>
inline float Vec3<float>::Normalize() {
float length = Length();
*this /= length;
return length;
}
using Vec3f = Vec3<float>;
template <typename T>
class Vec4 {
public:
T x{};
T y{};
T z{};
T w{};
constexpr Vec4() = default;
constexpr Vec4(const T& x_, const T& y_, const T& z_, const T& w_)
: x(x_), y(y_), z(z_), w(w_) {}
template <typename T2>
[[nodiscard]] constexpr Vec4<T2> Cast() const {
return Vec4<T2>(static_cast<T2>(x), static_cast<T2>(y), static_cast<T2>(z),
static_cast<T2>(w));
}
[[nodiscard]] static constexpr Vec4 AssignToAll(const T& f) {
return Vec4(f, f, f, f);
}
[[nodiscard]] constexpr Vec4<decltype(T{} + T{})> operator+(const Vec4& other) const {
return {x + other.x, y + other.y, z + other.z, w + other.w};
}
constexpr Vec4& operator+=(const Vec4& other) {
x += other.x;
y += other.y;
z += other.z;
w += other.w;
return *this;
}
[[nodiscard]] constexpr Vec4<decltype(T{} - T{})> operator-(const Vec4& other) const {
return {x - other.x, y - other.y, z - other.z, w - other.w};
}
constexpr Vec4& operator-=(const Vec4& other) {
x -= other.x;
y -= other.y;
z -= other.z;
w -= other.w;
return *this;
}
template <typename U = T>
[[nodiscard]] constexpr Vec4<std::enable_if_t<std::is_signed_v<U>, U>> operator-() const {
return {-x, -y, -z, -w};
}
[[nodiscard]] constexpr Vec4<decltype(T{} * T{})> operator*(const Vec4& other) const {
return {x * other.x, y * other.y, z * other.z, w * other.w};
}
template <typename V>
[[nodiscard]] constexpr Vec4<decltype(T{} * V{})> operator*(const V& f) const {
using TV = decltype(T{} * V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(z) * static_cast<C>(f)),
static_cast<TV>(static_cast<C>(w) * static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec4& operator*=(const V& f) {
*this = *this * f;
return *this;
}
template <typename V>
[[nodiscard]] constexpr Vec4<decltype(T{} / V{})> operator/(const V& f) const {
using TV = decltype(T{} / V{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(x) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(y) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(z) / static_cast<C>(f)),
static_cast<TV>(static_cast<C>(w) / static_cast<C>(f)),
};
}
template <typename V>
constexpr Vec4& operator/=(const V& f) {
*this = *this / f;
return *this;
}
[[nodiscard]] constexpr T Length2() const {
return x * x + y * y + z * z + w * w;
}
[[nodiscard]] constexpr T& operator[](std::size_t i) {
return *((&x) + i);
}
[[nodiscard]] constexpr const T& operator[](std::size_t i) const {
return *((&x) + i);
}
constexpr void SetZero() {
x = 0;
y = 0;
z = 0;
w = 0;
}
// Common alias: RGBA (colors)
[[nodiscard]] constexpr T& r() {
return x;
}
[[nodiscard]] constexpr T& g() {
return y;
}
[[nodiscard]] constexpr T& b() {
return z;
}
[[nodiscard]] constexpr T& a() {
return w;
}
[[nodiscard]] constexpr const T& r() const {
return x;
}
[[nodiscard]] constexpr const T& g() const {
return y;
}
[[nodiscard]] constexpr const T& b() const {
return z;
}
[[nodiscard]] constexpr const T& a() const {
return w;
}
// Swizzlers - Create a subvector of specific components
// e.g. Vec2 uv() { return Vec2(x,y); }
// _DEFINE_SWIZZLER2 defines a single such function
// DEFINE_SWIZZLER2_COMP1 defines one-component functions for all component names (x<->r)
// DEFINE_SWIZZLER2_COMP2 defines two component functions for all component names (x<->r) and
// permutations (xy<->yx)
#define _DEFINE_SWIZZLER2(a, b, name) \
[[nodiscard]] constexpr Vec2<T> name() const { return Vec2<T>(a, b); }
#define DEFINE_SWIZZLER2_COMP1(a, a2) \
_DEFINE_SWIZZLER2(a, a, a##a); \
_DEFINE_SWIZZLER2(a, a, a2##a2)
#define DEFINE_SWIZZLER2_COMP2(a, b, a2, b2) \
_DEFINE_SWIZZLER2(a, b, a##b); \
_DEFINE_SWIZZLER2(a, b, a2##b2); \
_DEFINE_SWIZZLER2(b, a, b##a); \
_DEFINE_SWIZZLER2(b, a, b2##a2)
DEFINE_SWIZZLER2_COMP2(x, y, r, g);
DEFINE_SWIZZLER2_COMP2(x, z, r, b);
DEFINE_SWIZZLER2_COMP2(x, w, r, a);
DEFINE_SWIZZLER2_COMP2(y, z, g, b);
DEFINE_SWIZZLER2_COMP2(y, w, g, a);
DEFINE_SWIZZLER2_COMP2(z, w, b, a);
DEFINE_SWIZZLER2_COMP1(x, r);
DEFINE_SWIZZLER2_COMP1(y, g);
DEFINE_SWIZZLER2_COMP1(z, b);
DEFINE_SWIZZLER2_COMP1(w, a);
#undef DEFINE_SWIZZLER2_COMP1
#undef DEFINE_SWIZZLER2_COMP2
#undef _DEFINE_SWIZZLER2
#define _DEFINE_SWIZZLER3(a, b, c, name) \
[[nodiscard]] constexpr Vec3<T> name() const { return Vec3<T>(a, b, c); }
#define DEFINE_SWIZZLER3_COMP1(a, a2) \
_DEFINE_SWIZZLER3(a, a, a, a##a##a); \
_DEFINE_SWIZZLER3(a, a, a, a2##a2##a2)
#define DEFINE_SWIZZLER3_COMP3(a, b, c, a2, b2, c2) \
_DEFINE_SWIZZLER3(a, b, c, a##b##c); \
_DEFINE_SWIZZLER3(a, c, b, a##c##b); \
_DEFINE_SWIZZLER3(b, a, c, b##a##c); \
_DEFINE_SWIZZLER3(b, c, a, b##c##a); \
_DEFINE_SWIZZLER3(c, a, b, c##a##b); \
_DEFINE_SWIZZLER3(c, b, a, c##b##a); \
_DEFINE_SWIZZLER3(a, b, c, a2##b2##c2); \
_DEFINE_SWIZZLER3(a, c, b, a2##c2##b2); \
_DEFINE_SWIZZLER3(b, a, c, b2##a2##c2); \
_DEFINE_SWIZZLER3(b, c, a, b2##c2##a2); \
_DEFINE_SWIZZLER3(c, a, b, c2##a2##b2); \
_DEFINE_SWIZZLER3(c, b, a, c2##b2##a2)
DEFINE_SWIZZLER3_COMP3(x, y, z, r, g, b);
DEFINE_SWIZZLER3_COMP3(x, y, w, r, g, a);
DEFINE_SWIZZLER3_COMP3(x, z, w, r, b, a);
DEFINE_SWIZZLER3_COMP3(y, z, w, g, b, a);
DEFINE_SWIZZLER3_COMP1(x, r);
DEFINE_SWIZZLER3_COMP1(y, g);
DEFINE_SWIZZLER3_COMP1(z, b);
DEFINE_SWIZZLER3_COMP1(w, a);
#undef DEFINE_SWIZZLER3_COMP1
#undef DEFINE_SWIZZLER3_COMP3
#undef _DEFINE_SWIZZLER3
};
template <typename T, typename V>
[[nodiscard]] constexpr Vec4<decltype(V{} * T{})> operator*(const V& f, const Vec4<T>& vec) {
using TV = decltype(V{} * T{});
using C = std::common_type_t<T, V>;
return {
static_cast<TV>(static_cast<C>(f) * static_cast<C>(vec.x)),
static_cast<TV>(static_cast<C>(f) * static_cast<C>(vec.y)),
static_cast<TV>(static_cast<C>(f) * static_cast<C>(vec.z)),
static_cast<TV>(static_cast<C>(f) * static_cast<C>(vec.w)),
};
}
using Vec4f = Vec4<float>;
template <typename T>
constexpr decltype(T{} * T{} + T{} * T{}) Dot(const Vec2<T>& a, const Vec2<T>& b) {
return a.x * b.x + a.y * b.y;
}
template <typename T>
[[nodiscard]] constexpr decltype(T{} * T{} + T{} * T{}) Dot(const Vec3<T>& a, const Vec3<T>& b) {
return a.x * b.x + a.y * b.y + a.z * b.z;
}
template <typename T>
[[nodiscard]] constexpr decltype(T{} * T{} + T{} * T{}) Dot(const Vec4<T>& a, const Vec4<T>& b) {
return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w;
}
template <>
[[nodiscard]] inline float Dot(const Vec4<float>& a, const Vec4<float>& b) {
#ifdef __ARM_NEON
float32x4_t va = vld1q_f32(&a.x);
float32x4_t vb = vld1q_f32(&b.x);
float32x4_t result = vmulq_f32(va, vb);
#if defined(__aarch64__) // Use vaddvq_f32 in ARMv8 architectures
return vaddvq_f32(result);
#else // Use manual addition for older architectures
float32x2_t sum2 = vadd_f32(vget_high_f32(result), vget_low_f32(result));
return vget_lane_f32(vpadd_f32(sum2, sum2), 0);
#endif
#else
return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w;
#endif
}
template <typename T>
[[nodiscard]] constexpr Vec3<decltype(T{} * T{} - T{} * T{})> Cross(const Vec3<T>& a,
const Vec3<T>& b) {
return {a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x};
}
// linear interpolation via float: 0.0=begin, 1.0=end
template <typename X>
[[nodiscard]] constexpr decltype(X{} * float{} + X{} * float{}) Lerp(const X& begin, const X& end,
const float t) {
return begin * (1.f - t) + end * t;
}
// linear interpolation via int: 0=begin, base=end
template <typename X, int base>
[[nodiscard]] constexpr decltype((X{} * int{} + X{} * int{}) / base) LerpInt(const X& begin,
const X& end,
const int t) {
return (begin * (base - t) + end * t) / base;
}
// bilinear interpolation. s is for interpolating x00-x01 and x10-x11, and t is for the second
// interpolation.
template <typename X>
[[nodiscard]] constexpr auto BilinearInterp(const X& x00, const X& x01, const X& x10, const X& x11,
const float s, const float t) {
auto y0 = Lerp(x00, x01, s);
auto y1 = Lerp(x10, x11, s);
return Lerp(y0, y1, t);
}
// Utility vector factories
template <typename T>
[[nodiscard]] constexpr Vec2<T> MakeVec(const T& x, const T& y) {
return Vec2<T>{x, y};
}
template <typename T>
[[nodiscard]] constexpr Vec3<T> MakeVec(const T& x, const T& y, const T& z) {
return Vec3<T>{x, y, z};
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const T& x, const T& y, const Vec2<T>& zw) {
return MakeVec(x, y, zw[0], zw[1]);
}
template <typename T>
[[nodiscard]] constexpr Vec3<T> MakeVec(const Vec2<T>& xy, const T& z) {
return MakeVec(xy[0], xy[1], z);
}
template <typename T>
[[nodiscard]] constexpr Vec3<T> MakeVec(const T& x, const Vec2<T>& yz) {
return MakeVec(x, yz[0], yz[1]);
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const T& x, const T& y, const T& z, const T& w) {
return Vec4<T>{x, y, z, w};
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const Vec2<T>& xy, const T& z, const T& w) {
return MakeVec(xy[0], xy[1], z, w);
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const T& x, const Vec2<T>& yz, const T& w) {
return MakeVec(x, yz[0], yz[1], w);
}
// NOTE: This has priority over "Vec2<Vec2<T>> MakeVec(const Vec2<T>& x, const Vec2<T>& y)".
// Even if someone wanted to use an odd object like Vec2<Vec2<T>>, the compiler would error
// out soon enough due to misuse of the returned structure.
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const Vec2<T>& xy, const Vec2<T>& zw) {
return MakeVec(xy[0], xy[1], zw[0], zw[1]);
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const Vec3<T>& xyz, const T& w) {
return MakeVec(xyz[0], xyz[1], xyz[2], w);
}
template <typename T>
[[nodiscard]] constexpr Vec4<T> MakeVec(const T& x, const Vec3<T>& yzw) {
return MakeVec(x, yzw[0], yzw[1], yzw[2]);
}
} // namespace Common
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