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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;
if (chunk::bbox bb; c->_bbox_for_scenery(*this, bb))
c->_remove_bbox(bb);
c->_world->do_kill_entity(id);
const_cast<std::uint64_t&>(id) = 0;
}
Vector2b entity::ordinal_offset_for_type(entity_type type, Vector2b offset)
{
switch (type)
{
default:
fm_warn_once("unknown entity type '%zu'", std::size_t(type));
[[fallthrough]];
case entity_type::scenery:
return offset;
case entity_type::character:
return {};
}
}
float entity_proto::ordinal(local_coords local) const
{
return entity::ordinal(local, offset, type);
}
float entity::ordinal() const
{
return ordinal(coord.local(), offset, type);
}
float entity::ordinal(local_coords xy, Vector2b offset, entity_type type)
{
constexpr auto inv_tile_size = 1.f/TILE_SIZE2;
constexpr float width = TILE_MAX_DIM+1;
offset = ordinal_offset_for_type(type, offset);
auto vec = Vector2(xy) + Vector2(offset)*inv_tile_size;
return vec[1]*width + vec[0];
}
struct chunk& entity::chunk() const
{
return *c;
}
std::size_t entity::index() const
{
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 (std::size_t)std::distance(es.cbegin(), it);
}
void entity::rotate(std::size_t, 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;
}
std::size_t entity::move(std::size_t i, Vector2i delta)
{
auto& es = c->_entities;
fm_debug_assert(i < es.size());
auto e_ = es[i];
const auto& e = *e_;
auto& w = *c->_world;
const auto coord = e.coord;
const auto offset = e.offset;
const auto [coord_, offset_] = normalize_coords(coord, offset, delta);
if (coord_ == coord && offset_ == offset)
return i;
if (!e.is_dynamic())
c->mark_scenery_modified(false);
chunk::bbox bb0, bb1;
bool b0 = c->_bbox_for_scenery(e, bb0),
b1 = c->_bbox_for_scenery(e, coord_.local(), offset_, bb1);
const auto ord = e.ordinal(coord_.local(), offset_, e.type);
if (coord_.chunk() == coord.chunk())
{
c->_replace_bbox(bb0, bb1, b0, b1);
auto it_ = std::lower_bound(es.cbegin(), es.cend(), e_, [=](const auto& a, const auto&) { return a->ordinal() < ord; });
e_->coord = coord_;
e_->offset = offset_;
auto pos1 = std::distance(es.cbegin(), it_);
if ((std::size_t)pos1 > i)
pos1--;
//for (auto i = 0_uz; const auto& x : es) fm_debug("%zu %s %f", i++, x->atlas->name().data(), x->ordinal());
if ((std::size_t)pos1 != i)
{
//fm_debug("insert (%hd;%hd|%hhd;%hhd) %td -> %zu | %f", coord_.chunk().x, coord_.chunk().y, coord_.local().x, coord_.local().y, pos1, es.size(), e.ordinal());
es.erase(es.cbegin() + (std::ptrdiff_t)i);
es.insert(es.cbegin() + pos1, std::move(e_));
}
return std::size_t(pos1);
}
else
{
//fm_debug("change-chunk (%hd;%hd|%hhd;%hhd)", coord_.chunk().x, coord_.chunk().y, coord_.local().x, coord_.local().y);
auto& c2 = w[coord_.chunk()];
if (!e.is_dynamic())
c2.mark_scenery_modified(false);
c2._add_bbox(bb1);
c->remove_entity(i);
auto& es = c2._entities;
auto it = std::lower_bound(es.cbegin(), es.cend(), e_, [=](const auto& a, const auto&) { return a->ordinal() < ord; });
auto ret = (std::size_t)std::distance(es.cbegin(), it);
e_->coord = coord_;
e_->offset = offset_;
const_cast<struct chunk*&>(e_->c) = &c2;
es.insert(it, std::move(e_));
return ret;
}
}
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(std::size_t) const { return false; }
bool entity::activate(std::size_t) { return false; }
bool entity::is_dynamic() const
{
return atlas->info().fps > 0;
}
} // namespace floormat
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