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#pragma once
#include "tile-constants.hpp"
#include "global-coords.hpp"
#include "object-id.hpp"
#include "world.hpp"
#include "compat/function2.fwd.hpp"
#include "path-search-result.hpp"
#include <concepts>
#include <array>
#include <Magnum/Math/Vector2.h>
#include <Magnum/DimensionTraits.h>
namespace floormat {
class world;
struct object;
class chunk;
} // namespace floormat
// todo add pathfinding sub-namespace
namespace floormat::detail_astar {
struct cache;
struct chunk_cache;
static constexpr int div_factor = 4;
static constexpr auto div_size = iTILE_SIZE2 / div_factor;
static constexpr auto min_size = Vector2ui(div_size * 2);
} // namespace floormat::detail_astar
namespace floormat {
struct path_search_result;
enum class path_search_continue : bool { pass = false, blocked = true };
class path_search final
{
friend struct path_search_result;
public:
template<typename T>
requires std::is_arithmetic_v<T>
struct bbox
{
VectorTypeFor<2, T> min, max;
template<typename U>
requires std::is_arithmetic_v<U>
explicit constexpr operator bbox<U>() const {
using Vec = VectorTypeFor<2, U>;
return bbox<U>{ Vec(min), Vec(max) };
}
constexpr bool operator==(const bbox<T>&) const = default;
};
using pred = fu2::function_view<path_search_continue(collision_data) const>;
static const pred& never_continue() noexcept;
static const pred& always_continue() noexcept;
static bool is_passable_1(chunk& c, Vector2 min, Vector2 max, object_id own_id, const pred& p = never_continue());
static bool is_passable_(chunk* c0, const std::array<chunk*, 8>& neighbors,
Vector2 min, Vector2 max, object_id own_id, const pred& p = never_continue());
static bool is_passable(world& w, global_coords coord, Vector2b offset, Vector2ui size, object_id own_id, const pred& p = never_continue());
static bool is_passable(world& w, struct detail_astar::cache& cache, global_coords coord, Vector2b offset, Vector2ui size, object_id own_id, const pred& p = never_continue());
static bool is_passable(world& w, chunk_coords_ ch0, const bbox<float>& bb, object_id own_id, const pred& p = never_continue());
static bool is_passable(world& w, struct detail_astar::cache& cache, chunk_coords_ ch0, const bbox<float>& bb, object_id own_id, const pred& p = never_continue());
};
} // namespace floormat
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