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#include "entity.hpp"
#include "world.hpp"
#include "rotation.inl"
#include "chunk.inl"
#include "anim-atlas.hpp"
#include "RTree.hpp"
#include <algorithm>
namespace floormat {
bool entity_proto::operator==(const entity_proto&) const = default;
entity_proto& entity_proto::operator=(const entity_proto&) = default;
entity_proto::~entity_proto() noexcept = default;
entity_proto::entity_proto() = default;
entity_proto::entity_proto(const entity_proto&) = default;
entity::entity(std::uint64_t id, struct chunk& c, entity_type type) noexcept :
id{id}, c{c}, type{type}
{
}
entity::entity(std::uint64_t id, struct chunk& c, entity_type type, const entity_proto& proto) noexcept :
id{id}, c{c}, atlas{proto.atlas},
offset{proto.offset}, bbox_offset{proto.bbox_offset},
bbox_size{proto.bbox_size}, delta{proto.delta},
frame{proto.frame}, type{type}, r{proto.r}, pass{proto.pass}
{
fm_assert(type == proto.type);
}
entity::~entity() noexcept
{
fm_debug_assert(id);
if (c._teardown || c._world->_teardown) [[unlikely]]
return;
auto& w = *c._world;
if (chunk::bbox bb; c._bbox_for_scenery(*this, bb))
c._remove_bbox(bb);
auto& es = c._entities;
auto it = std::find_if(es.cbegin(), es.cend(), [id = id](const auto& x) { return x->id == id; });
fm_debug_assert(it != es.cend());
es.erase(it);
w.do_kill_entity(id);
}
std::uint32_t entity_proto::ordinal(local_coords local) const
{
return entity::ordinal(local, offset);
}
std::uint32_t entity::ordinal() const
{
return ordinal(coord.local(), offset);
}
std::uint32_t entity::ordinal(local_coords xy, Vector2b offset)
{
constexpr auto x_size = (std::uint32_t)TILE_MAX_DIM * (std::uint32_t)iTILE_SIZE[0];
auto vec = Vector2ui(xy) * Vector2ui(iTILE_SIZE2) + Vector2ui(offset);
return vec[1] * x_size + vec[0];
}
struct chunk& entity::chunk() const
{
return c;
}
auto entity::iter() const -> It
{
auto& c = chunk();
auto& es = c._entities;
auto it = std::lower_bound(es.cbegin(), es.cend(), nullptr, [ord = ordinal()](const auto& a, const auto&) { return a->ordinal() < ord; });
fm_assert(it != es.cend());
it = std::find_if(it, es.cend(), [id = id](const auto& x) { return x->id == id; });
fm_assert(it != es.cend());
return it;
}
bool entity::operator==(const entity_proto& o) const
{
return atlas.get() == o.atlas.get() &&
type == o.type && frame == o.frame && r == o.r && pass == o.pass &&
offset == o.offset && bbox_offset == o.bbox_offset &&
bbox_size == o.bbox_size && delta == o.delta;
}
void entity::rotate(It, rotation new_r)
{
auto& w = *c._world;
w[coord.chunk()].with_scenery_update(*this, [&]() {
bbox_offset = rotate_point(bbox_offset, r, new_r);
bbox_size = rotate_size(bbox_size, r, new_r);
r = new_r;
});
}
template <typename T> constexpr T sgn(T val) { return T(T(0) < val) - T(val < T(0)); }
Pair<global_coords, Vector2b> entity::normalize_coords(global_coords coord, Vector2b cur_offset, Vector2i new_offset)
{
auto off_tmp = Vector2i(cur_offset) + new_offset;
auto off_new = off_tmp % iTILE_SIZE2;
constexpr auto half_tile = iTILE_SIZE2/2;
for (auto i = 0_uz; i < 2; i++)
{
auto sign = sgn(off_new[i]);
auto absval = std::abs(off_new[i]);
if (absval > half_tile[i])
{
Vector2i v(0);
v[i] = sign;
coord += v;
off_new[i] = (iTILE_SIZE[i] - absval)*-sign;
}
}
return { coord, Vector2b(off_new) };
}
bool entity::can_move_to(Vector2i delta)
{
auto [coord_, offset_] = normalize_coords(coord, offset, delta);
auto& w = *c._world;
auto& c_ = coord.chunk() == coord_.chunk() ? c : w[coord_.chunk()];
const auto center = Vector2(coord_.local())*TILE_SIZE2 + Vector2(offset_) + Vector2(bbox_offset),
half_bbox = Vector2(bbox_size/2),
min = center - half_bbox, max = min + Vector2(bbox_size);
bool ret = true;
c_.rtree()->Search(min.data(), max.data(), [&](std::uint64_t data, const auto&) {
auto id2 = std::bit_cast<collision_data>(data).data;
if (id2 != id)
return ret = false;
else
return true;
});
return ret;
}
void entity::move(It it, Vector2i delta)
{
auto e_ = *it;
auto& e = *e_;
auto& c = e.c;
auto& w = *c._world;
auto& coord = e.coord;
auto& offset = e.offset;
auto& es = c._entities;
auto [coord_, offset_] = normalize_coords(coord, offset, delta);
if (coord_ == coord && offset_ == offset)
return;
if (!e.is_dynamic())
c.mark_scenery_modified(false);
bool same_chunk = coord_.chunk() == coord.chunk();
chunk::bbox bb0, bb1;
bool b0 = c._bbox_for_scenery(e, bb0);
coord = coord_; offset = offset_;
bool b1 = c._bbox_for_scenery(e, bb1);
if (same_chunk)
{
c._replace_bbox(bb0, bb1, b0, b1);
auto it_ = std::lower_bound(es.cbegin(), es.cend(), e_, [ord = e.ordinal()](const auto& a, const auto&) { return a->ordinal() < ord; });
if (it_ != it)
{
auto pos0 = std::distance(es.cbegin(), it), pos1 = std::distance(es.cbegin(), it_);
if (pos1 > pos0)
pos1--;
es.erase(it);
[[maybe_unused]] auto size = es.size();
es.insert(es.cbegin() + pos1, std::move(e_));
}
}
else
{
auto& c2 = w[coord.chunk()];
if (!e.is_dynamic())
c2.mark_scenery_modified(false);
c._remove_bbox(bb0);
c2._add_bbox(bb1);
c.remove_entity(it);
auto it_ = std::lower_bound(c2._entities.cbegin(), c2._entities.cend(), e_,
[ord = e.ordinal()](const auto& a, const auto&) { return a->ordinal() < ord; });
c2._entities.insert(it_, std::move(e_));
}
}
entity::operator entity_proto() const
{
entity_proto x;
x.atlas = atlas;
x.offset = offset;
x.bbox_offset = bbox_offset;
x.bbox_size = bbox_size;
x.delta = delta;
x.frame = frame;
x.type = type;
x.r = r;
x.pass = pass;
return x;
}
bool entity::can_activate(It) const { return false; }
bool entity::activate(It) { return false; }
bool entity::is_dynamic() const
{
return atlas->info().fps > 0;
}
} // namespace floormat
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