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#include "hole.hpp"
#include "compat/array-size.hpp"
#include "compat/iota.hpp"
#include "compat/map.hpp"
//#include <mg/Functions.h>
#ifdef __GNUG__
#pragma GCC diagnostic ignored "-Wswitch-default"
//#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
#ifdef __clang__
#pragma clang diagnostic ignored "-Wbitwise-instead-of-logical"
#endif
namespace floormat {
namespace {
template<typename T> using Cr = CutResult<T>;
template<typename T> using bbox = typename Cr<T>::bbox;
template<typename T> using rect = typename Cr<T>::rect;
enum shift : uint8_t { __ = 0, x0 = 1 << 0, x1 = 1 << 1, y0 = 1 << 2, y1 = 1 << 3, };
enum class location : uint8_t { R0, R1, H0, H1, };
struct coords
{
location x0 : 2;
location x1 : 2;
location y0 : 2;
location y1 : 2;
};
struct element
{
uint8_t size;
std::array<coords, 8> array;
};
template<typename T> using Vec2ʹ = VectorTypeFor<2, T>;
constexpr element make_element(uint8_t s)
{
// NOLINTBEGIN(*-simplify, *-redundant-expression)
// ReSharper disable CppIdenticalOperandsInBinaryExpression
switch (s)
{
using enum location;
case x0|x1|y0|y1: return element{0, {{ // 9.1
}}};
case __|__|__|__: return element{8, {{ // 14.1
{R0, H0, R0, H0},
{H0, H1, R0, H0},
{H1, R1, R0, H0},
{R0, H0, H0, H1},
{H1, R1, H0, H1},
{R0, H0, H1, R1},
{H0, H1, H1, R1},
{H1, R1, H1, R1},
}}};
case x0|x1|__|__: return element{2, {{ // 13.1
{R0, R1, R0, H0},
{R0, R1, H1, R1},
}}};
case __|__|y0|y1: return element{2, {{ // 13.2
{R0, H0, R0, R1},
{H1, R1, R0, R1},
}}};
case x0|x1|y0|__: return element{1, {{ // 12.1
{R0, R1, H1, R1},
}}};
case x0|x1|__|y1: return element{1, {{ // 12.2
{R0, R1, R0, H0},
}}};
case x0|__|y0|y1: return element{1, {{ // 12.3
{H1, R1, R0, R1},
}}};
case __|x1|y0|y1: return element{1, {{ // 12.4
{R0, H0, R0, R1},
}}};
case x0|__|__|__: return element{3, {{ // 10.1
{R0, R1, R0, H0},
{H1, R1, H0, H1},
{R0, R1, H1, R1},
}}};
case __|x1|__|__: return element{3, {{ // 10.2
{R0, R1, R0, H0},
{R0, H0, H0, H1},
{R0, R1, H1, R1},
}}};
case __|__|y0|__: return element{3, {{ // 10.3
{R0, H0, R0, R1},
{H0, H1, H1, R1},
{H1, R1, R0, R1},
}}};
case __|__|__|y1: return element{3, {{ // 10.4
{R0, H0, R0, R1},
{H0, H1, R0, H0},
{H1, R1, R0, R1},
}}};
case x0|__|y0|__: return element{2, {{ // 11.1
{H1, R1, R0, H1},
{R0, R1, H1, R1},
}}};
case __|x1|y0|__: return element{2, {{ // 11.2
{R0, H0, R0, H1},
{R0, R1, H1, R1},
}}};
case x0|__|__|y1: return element{2, {{ // 11.3
{R0, R1, R0, H0},
{H1, R1, H0, R1},
}}};
case __|x1|__|y1: return element{2, {{ // 11.4
{R0, R1, R0, H0},
{R0, H0, H0, R1},
}}};
}
// ReSharper restore CppIdenticalOperandsInBinaryExpression
// NOLINTEND(*-simplify, *-redundant-expression)
fm_assert(false);
}
constexpr auto elements = map(make_element, iota_array<uint8_t, 16>);
template<typename T>
constexpr auto get_value_from_coord(Vec2ʹ<T> r0, Vec2ʹ<T> r1, Vec2ʹ<T> h0, Vec2ʹ<T> h1, coords c)
{
const auto xs = std::array{ r0.x(), r1.x(), h0.x(), h1.x(), };
const auto ys = std::array{ r0.y(), r1.y(), h0.y(), h1.y(), };
const auto x0 = xs[(uint8_t)c.x0];
const auto x1 = xs[(uint8_t)c.x1];
const auto y0 = ys[(uint8_t)c.y0];
const auto y1 = ys[(uint8_t)c.y1];
return rect<T>{ {x0, y0}, {x1, y1} };
}
template<typename T>
[[nodiscard]]
constexpr bool check_empty(Vec2ʹ<T> r0, Vec2ʹ<T> r1, Vec2ʹ<T> h0, Vec2ʹ<T> h1)
{
bool iempty = r0.x() == r1.x() | r0.y() == r1.y();
bool hempty = h0.x() == h1.x() | h0.y() == h1.y();
bool empty_before_x = h1.x() <= r0.x();
bool empty_after_x = h0.x() >= r1.x();
bool empty_before_y = h1.y() <= r0.y();
bool empty_after_y = h0.y() >= r1.y();
return iempty | hempty | empty_before_x | empty_after_x | empty_before_y | empty_after_y;
}
template<typename T>
constexpr Cr<T> cut_rectangle(Vec2ʹ<T> r0, Vec2ʹ<T> r1, Vec2ʹ<T> h0, Vec2ʹ<T> h1)
{
if (check_empty<T>(r0, r1, h0, h1))
return {
.array = {{ { r0, r1 }, }},
.size = 1,
.found = false,
};
const bool sx = h0.x() <= r0.x();
const bool ex = h1.x() >= r1.x();
const bool sy = h0.y() <= r0.y();
const bool ey = h1.y() >= r1.y();
auto val = uint8_t(sx << 0 | ex << 1 | sy << 2 | ey << 3);
CORRADE_ASSUME(val < 16);
const auto elt = elements[val];
const auto sz = elt.size;
Cr<T> res = {
.array = {},
.size = sz,
.found = true,
};
for (auto i = 0u; i < 8; i++)
res.array[i] = get_value_from_coord<T>(r0, r1, h0, h1, elt.array[i]);
return res;
}
template<typename T>
constexpr Cr<T> cut_rectangle(bbox<T> input, bbox<T> hole)
{
using Vec2 = Vec2ʹ<T>;
auto ihalf = Vec2{input.bbox_size/2};
auto r0 = input.position - ihalf;
auto r1 = input.position + Vec2{input.bbox_size} - ihalf;
auto hhalf = Vec2{hole.bbox_size/2};
auto h0 = hole.position - hhalf;
auto h1 = hole.position + Vec2{hole.bbox_size} - hhalf;
return cut_rectangle<T>(r0, r1, h0, h1);
}
} // namespace
template<typename T> Cr<T> CutResult<T>::cut(bbox input, bbox hole) { return cut_rectangle<T>(input, hole); }
template<typename T> Cr<T> CutResult<T>::cut(Vec2 r0, Vec2 r1, Vec2 h0, Vec2 h1) { return cut_rectangle<T>(r0, r1, h0, h1); }
template struct CutResult<Int>;
template struct CutResult<float>;
} // namespace floormat
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