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#include "ground-editor.hpp"
#include "compat/assert.hpp"
#include "compat/exception.hpp"
#include "src/ground-atlas.hpp"
#include "src/world.hpp"
#include "src/random.hpp"
#include "keys.hpp"
#include "loader/loader.hpp"
#include "loader/ground-cell.hpp"
#include <memory>
#include <Corrade/Containers/GrowableArray.h>
#include <Corrade/Utility/Path.h>
namespace floormat {
typename std::map<StringView, ground_cell>::const_iterator ground_editor::begin() const noexcept { return _atlases.cbegin(); }
typename std::map<StringView, ground_cell>::const_iterator ground_editor::end() const noexcept { return _atlases.cend(); }
struct ground_editor::tuple
{
std::shared_ptr<ground_atlas> atlas;
Array<variant_t> variant;
};
ground_editor::ground_editor()
{
load_atlases();
}
ground_editor::~ground_editor() noexcept = default;
void ground_editor::load_atlases()
{
fm_assert(_atlases.empty());
for (const auto& g : loader.ground_atlas_list())
{
if (g.name != loader.INVALID) [[likely]]
(void)loader.ground_atlas(g.name);
fm_assert(g.atlas);
_atlases[g.name] = g;
}
fm_assert(!_atlases.empty());
}
std::shared_ptr<ground_atlas> ground_editor::maybe_atlas(StringView str)
{
if (auto it = _atlases.find(str); it != _atlases.end())
return it->second.atlas;
else
return nullptr;
}
std::shared_ptr<ground_atlas> ground_editor::atlas(StringView str)
{
if (auto ptr = maybe_atlas(str))
return ptr;
else
fm_throw("no such atlas: {}"_cf, str);
}
StringView ground_editor::name() const noexcept { return "ground"_s; }
void ground_editor::clear_selection()
{
_selected_tile = {};
*_permutation = {};
_selection_mode = sel_none;
}
void ground_editor::select_tile(const std::shared_ptr<ground_atlas>& atlas, size_t variant)
{
fm_assert(atlas);
clear_selection();
_selection_mode = sel_tile;
_selected_tile = { atlas, variant_t(variant % atlas->num_tiles()) };
}
void ground_editor::select_tile_permutation(const std::shared_ptr<ground_atlas>& atlas)
{
fm_assert(atlas);
clear_selection();
_selection_mode = sel_perm;
*_permutation = { atlas, {} };
}
bool ground_editor::is_tile_selected(const std::shared_ptr<const ground_atlas>& atlas, size_t variant) const
{
return atlas && _selection_mode == sel_tile && _selected_tile &&
atlas == _selected_tile.atlas && variant == _selected_tile.variant;
}
bool ground_editor::is_permutation_selected(const std::shared_ptr<const ground_atlas>& atlas) const
{
const auto& [perm, _] = *_permutation;
return atlas && _selection_mode == sel_perm && perm == atlas;
}
bool ground_editor::is_atlas_selected(const std::shared_ptr<const ground_atlas>& atlas) const
{
switch (_selection_mode)
{
default:
case sel_none:
return false;
case sel_perm:
return is_permutation_selected(atlas);
case sel_tile:
return atlas && _selected_tile && atlas == _selected_tile.atlas;
}
}
bool ground_editor::is_anything_selected() const
{
return _selection_mode != sel_none;
}
template<std::random_access_iterator T>
void fisher_yates(T begin, T end)
{
const auto N = std::distance(begin, end);
for (auto i = N-1; i >= 1; i--)
{
const auto j = random(i+1);
swap(begin[i], begin[j]);
}
}
tile_image_proto ground_editor::get_selected_perm()
{
auto& [atlas, vec] = *_permutation;
static_assert(sizeof(uint32_t) >= sizeof(variant_t));
const auto N = (uint32_t)atlas->num_tiles();
fm_assert(N == (uint32_t)(variant_t)N);
if (N == 0)
return {};
arrayReserve(vec, N);
if (vec.isEmpty())
{
arrayResize(vec, NoInit, N);
for (uint32_t i = 0; i < N; i++)
vec[i] = (variant_t)i;
fisher_yates(vec.begin(), vec.end());
}
const auto idx = vec.back();
arrayRemoveSuffix(vec);
return {atlas, idx};
}
tile_image_proto ground_editor::get_selected()
{
switch (_selection_mode)
{
default:
fm_warn_once("invalid editor mode '%u'", (unsigned)_selection_mode);
[[fallthrough]];
case sel_none:
return {};
case sel_tile:
return _selected_tile;
case sel_perm:
return get_selected_perm();
}
}
void ground_editor::place_tile(world& world, global_coords pos, const tile_image_proto& img)
{
auto [c, t] = world[pos];
c.mark_ground_modified();
t.ground() = img;
}
auto ground_editor::check_snap(int mods) const -> editor_snap_mode
{
const bool ctrl = mods & kmod_ctrl, shift = mods & kmod_shift;
if (!(ctrl | shift))
return editor_snap_mode::none;
if (shift)
return editor_snap_mode::horizontal;
if (ctrl)
return editor_snap_mode::vertical;
return editor_snap_mode::none;
}
} // namespace floormat
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