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#pragma once
#include "compat/LooseQuadtree-impl.h"
#include "src/pass-mode.hpp"
namespace floormat {
template<typename Num, typename BB, typename BBE>
struct collision_iterator final
{
using Query = typename loose_quadtree::LooseQuadtree<Num, BB, BBE>::Query;
explicit collision_iterator() noexcept : q{nullptr} {}
explicit collision_iterator(Query* q) noexcept : q{q} {}
~collision_iterator() noexcept
{
if (q)
while (!q->EndOfQuery())
q->Next();
}
collision_iterator& operator++() noexcept
{
fm_debug_assert(q != nullptr && !q->EndOfQuery());
q->Next();
return *this;
}
const BB* operator++(int) noexcept
{
fm_debug_assert(q != nullptr && !q->EndOfQuery());
auto* bbox = q->GetCurrent();
fm_debug_assert(bbox != nullptr);
operator++();
return bbox;
}
const BB& operator*() const noexcept { return *operator->(); }
const BB* operator->() const noexcept
{
fm_debug_assert(q != nullptr && !q->EndOfQuery());
auto* ptr = q->GetCurrent();
fm_debug_assert(ptr != nullptr);
return ptr;
}
bool operator==(const collision_iterator& other) const noexcept
{
if (q && !other.q) [[likely]]
return q->EndOfQuery();
else if (!q && !other.q)
return true;
else if (!q)
return other.q->EndOfQuery();
else
return q == other.q;
}
operator bool() const noexcept { return q && !q->EndOfQuery(); }
private:
Query* q;
};
template<typename Num, typename BB, typename BBE>
struct collision_query
{
using Query = typename loose_quadtree::LooseQuadtree<Num, BB, BBE>::Query;
collision_query(Query&& q) noexcept : q{std::move(q)} {}
~collision_query() noexcept { while (!q.EndOfQuery()) q.Next(); }
collision_iterator<Num, BB, BBE> begin() noexcept { return collision_iterator<Num, BB, BBE>{&q}; }
static collision_iterator<Num, BB, BBE> end() noexcept { return collision_iterator<Num, BB, BBE>{nullptr}; }
operator bool() const noexcept { return !q.EndOfQuery(); }
private:
Query q;
};
} // namespace floormat
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