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#pragma once
#include "local-coords.hpp"
#include "compat/assert.hpp"
#include <Magnum/Magnum.h>
#include <Magnum/Math/Vector2.h>
#include <Magnum/Math/Vector3.h>
namespace floormat {
struct chunk_coords final {
std::int16_t x = 0, y = 0;
constexpr bool operator==(const chunk_coords& other) const noexcept = default;
constexpr Vector2i operator-(chunk_coords other) const noexcept;
template<typename T>
requires (std::is_floating_point_v<T> || std::is_integral_v<T> && (sizeof(T) > sizeof(x) || std::is_same_v<T, std::decay_t<decltype(x)>>))
explicit constexpr operator Math::Vector2<T>() const noexcept { return Math::Vector2<T>(T(x), T(y)); }
template<typename T>
requires (std::is_floating_point_v<T> || std::is_integral_v<T> && (sizeof(T) > sizeof(x) || std::is_same_v<T, std::decay_t<decltype(x)>>))
explicit constexpr operator Math::Vector3<T>() const noexcept { return Math::Vector3<T>(T(x), T(y), T(0)); }
};
constexpr Vector2i chunk_coords::operator-(chunk_coords other) const noexcept
{
return { Int{x} - other.x, Int{y} - other.y };
}
struct global_coords final {
using u0 = std::integral_constant<std::uint32_t, (1<<15)>;
using s0 = std::integral_constant<std::int32_t, std::int32_t(u0::value)>;
std::uint32_t x = u0::value<<4, y = u0::value<<4;
constexpr global_coords() noexcept = default;
constexpr global_coords(chunk_coords c, local_coords xy) :
x{ std::uint32_t((c.x + s0::value) << 4) | (xy.x & 0x0f) },
y{ std::uint32_t((c.y + s0::value) << 4) | (xy.y & 0x0f) }
{}
constexpr global_coords(std::uint32_t x, std::uint32_t y) noexcept : x{x}, y{y} {}
constexpr global_coords(std::int32_t x, std::int32_t y) noexcept :
x{std::uint32_t(x + (s0::value<<4))}, y{std::uint32_t(y + (s0::value<<4))}
{}
constexpr local_coords local() const noexcept;
constexpr chunk_coords chunk() const noexcept;
constexpr Vector2i to_signed() const noexcept;
constexpr Vector3i to_signed3() const noexcept;
constexpr bool operator==(const global_coords& other) const noexcept = default;
constexpr global_coords operator+(Vector2i vec) const noexcept;
constexpr global_coords operator-(Vector2i vec) const noexcept;
constexpr global_coords& operator+=(Vector2i vec) noexcept;
constexpr global_coords& operator-=(Vector2i vec) noexcept;
constexpr Vector2i operator-(global_coords other) const noexcept;
};
constexpr local_coords global_coords::local() const noexcept
{
return { std::uint8_t(x & 0x0f), std::uint8_t(y & 0x0f), };
}
constexpr chunk_coords global_coords::chunk() const noexcept
{
return { std::int16_t(std::int32_t((x>>4) - u0::value)), std::int16_t(std::int32_t((y>>4) - u0::value)), };
}
constexpr Vector2i global_coords::to_signed() const noexcept
{
return { std::int32_t(x - (s0::value<<4)), std::int32_t(y - (s0::value<<4)), };
}
constexpr Vector3i global_coords::to_signed3() const noexcept
{
return Vector3i(to_signed(), 0);
}
constexpr global_coords global_coords::operator+(Vector2i vec) const noexcept
{
return { std::uint32_t((std::int64_t)x+vec[0]), std::uint32_t((std::int64_t)y+vec[1]) };
}
constexpr global_coords& global_coords::operator+=(Vector2i vec) noexcept
{
x = std::uint32_t((std::int64_t)x+vec[0]);
y = std::uint32_t((std::int64_t)y+vec[1]);
return *this;
}
constexpr global_coords global_coords::operator-(Vector2i vec) const noexcept
{
return { std::uint32_t((std::int64_t)x-vec[0]), std::uint32_t((std::int64_t)y-vec[1]) };
}
constexpr global_coords& global_coords::operator-=(Vector2i vec) noexcept
{
x = std::uint32_t((std::int64_t)x-vec[0]);
y = std::uint32_t((std::int64_t)y-vec[1]);
return *this;
}
constexpr Vector2i global_coords::operator-(global_coords other) const noexcept
{
return to_signed() - other.to_signed();
}
} // namespace floormat
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