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#include "chunk.hpp"
#include "RTree.hpp"
#include "tile-atlas.hpp"
#include <bit>
#include <Corrade/Containers/PairStl.h>
namespace floormat {
const chunk::RTree* chunk::rtree() const noexcept { return &_rtree; }
chunk::RTree* chunk::rtree() noexcept { return &_rtree; }
namespace {
constexpr Vector2 tile_start(std::size_t k)
{
constexpr auto half_tile = Vector2(TILE_SIZE2)/2;
const local_coords coord{k};
return TILE_SIZE2 * Vector2(coord) - half_tile;
}
constexpr Pair<Vector2, Vector2> scenery_tile(std::size_t k, const scenery& sc)
{
const local_coords coord{k};
auto center = TILE_SIZE2 * Vector2(coord) + Vector2(sc.offset) + Vector2(sc.bbox_offset);
auto start = center - Vector2(sc.bbox_size);
auto size = Vector2(sc.bbox_size)*2;
return { start, start + size, };
};
constexpr Pair<Vector2, Vector2> whole_tile(std::size_t k)
{
auto start = tile_start(k);
return { start, start + TILE_SIZE2, };
};
constexpr Pair<Vector2, Vector2> wall_north(std::size_t k)
{
auto start = tile_start(k) - Vector2(0, 1);
return { start, start + Vector2(TILE_SIZE2[0], 2), };
};
constexpr Pair<Vector2, Vector2> wall_west(std::size_t k)
{
auto start = tile_start(k) - Vector2(1, 0);
return { start, start + Vector2(2, TILE_SIZE2[1]), };
};
constexpr std::uint64_t make_id(collision_type type, std::uint64_t id)
{
return std::bit_cast<std::uint64_t>(collision_data { (std::uint64_t)type, id });
}
} // namespace
void chunk::ensure_passability() noexcept
{
if (!_pass_modified)
return;
_pass_modified = false;
_rtree.RemoveAll();
for (auto i = 0_uz; i < TILE_COUNT; i++)
{
auto tile = operator[](i);
if (auto s = tile.scenery())
if (s.frame.passability != pass_mode::pass && Vector2ui(s.frame.bbox_size).product() > 0)
{
auto [start, end] = scenery_tile(i, s.frame);
auto id = make_id(collision_type::scenery, i);
_rtree.Insert(start.data(), end.data(), id);
}
}
for (auto i = 0_uz; i < TILE_COUNT; i++)
{
if (const auto* atlas = ground_atlas_at(i))
if (atlas->pass_mode(pass_mode::pass) != pass_mode::pass)
{
auto [start, end] = whole_tile(i);
auto id = make_id(collision_type::geometry, i);
_rtree.Insert(start.data(), end.data(), id);
}
}
for (auto i = 0_uz; i < TILE_COUNT; i++)
{
auto tile = operator[](i);
if (const auto* atlas = tile.wall_north_atlas().get())
if (atlas->pass_mode(pass_mode::blocked) != pass_mode::pass)
{
auto [start, end] = wall_north(i);
auto id = make_id(collision_type::geometry, i);
_rtree.Insert(start.data(), end.data(), id);
}
if (const auto* atlas = tile.wall_west_atlas().get())
if (atlas->pass_mode(pass_mode::blocked) != pass_mode::pass)
{
auto [start, end] = wall_west(i);
auto id = make_id(collision_type::geometry, i);
_rtree.Insert(start.data(), end.data(), id);
}
}
}
} // namespace floormat
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