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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
namespace floormat {
namespace {
using bbox = cut_rectangle_result::bbox;
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;
};
constexpr element make_element(uint8_t s)
{
switch (s)
{
using enum location;
case x0|x1|y0|y1: return element{1, {{ // 9.1
{R0, R1, R0, R1},
}}};
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, H0, 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, H1, 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, H0, 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, H1},
}}};
}
fm_assert(false);
}
constexpr auto elements = map(make_element, iota_array<uint8_t, 16>);
static_assert(array_size(elements) == 16);
} // namespace
constexpr cut_rectangle_result cut_rectangle(bbox input, bbox hole)
{
auto ihalf = Vector2i{input.bbox_size/2};
auto r0 = input.position - ihalf;
auto r1 = input.position + Vector2i{input.bbox_size} - ihalf;
auto hhalf = Vector2i{hole.bbox_size/2};
auto h0 = hole.position - hhalf;
auto h1 = hole.position + Vector2i{hole.bbox_size} - hhalf;
{
bool iempty = Vector2ui{input.bbox_size}.product() == 0;
bool hempty = Vector2ui{hole.bbox_size}.product() == 0;
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();
if (iempty | hempty | empty_before_x | empty_after_x | empty_before_y | empty_after_y) [[unlikely]]
return { 0, {} };
}
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];
cut_rectangle_result res = {
.size = elt.size,
.array = {},
};
const Int xs[4] = { r0.x(), r1.x(), h0.x(), h1.x(), };
const Int ys[4] = { r0.y(), r1.y(), h0.y(), h1.y(), };
for (auto i = 0uz; i < elt.size; i++)
{
const auto e = elt.array[i];
const auto x0 = xs[(uint8_t)e.x0];
const auto x1 = xs[(uint8_t)e.x1];
const auto y0 = ys[(uint8_t)e.y0];
const auto y1 = ys[(uint8_t)e.y1];
res.array[i] = { {x0, y0}, {x1, y1}, };
}
fm_assert(false);
std::unreachable();
//return -1;
}
} // namespace floormat
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