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#ifndef CLIENT_WORLD_CHUNK_HH_
#define CLIENT_WORLD_CHUNK_HH_
#include <algorithm>
#include <optional>
#include <ranges>
#include <unordered_map>
#include <vector>
#include "client/render/render.hh"
#include "client/render/texture.hh"
#include "client/world/block.hh"
#include "shared/entity/player.hh"
#include "shared/world/chunk.hh"
namespace client {
namespace world {
class chunk;
using chunks_t = std::unordered_map<shared::math::coords,
std::optional<client::world::chunk>,
decltype(&shared::world::chunk::hash),
decltype(&shared::world::chunk::equal)>;
// client::world::chunk is a renderable shared::world::chunk.
class chunk : public shared::world::chunk {
public:
// Which part to draw when we call draw.
enum class pass { solid, water };
public:
bool should_regenerate_vbo;
private:
struct gl_objects {
unsigned long solid_elements;
GLuint solid_vbo;
GLuint solid_vao;
unsigned long water_elements;
GLuint water_vbo;
GLuint water_vao;
gl_objects(const unsigned long se, const GLuint svbo, const GLuint svao,
const unsigned long we, const GLuint wvbo, const GLuint wvao)
: solid_elements(se), solid_vbo(svbo), solid_vao(svao),
water_elements(we), water_vbo(wvbo), water_vao(wvao) {}
gl_objects(const gl_objects&) = delete;
gl_objects(gl_objects&&) = delete;
~gl_objects() {
glDeleteBuffers(1, &solid_vbo);
glDeleteVertexArrays(1, &solid_vao);
glDeleteBuffers(1, &water_vbo);
glDeleteVertexArrays(1, &water_vao);
}
};
std::optional<gl_objects> glo;
private:
const chunk* get_neighbour(const chunks_t& chunks,
shared::math::coords offset) const noexcept;
void render(const float x_offset, const float z_offset,
const pass& pass) noexcept;
bool maybe_regenerate_glo(const chunks_t& chunks) noexcept;
public:
template <typename... Args>
chunk(Args&&... args) noexcept
: shared::world::chunk(std::forward<Args>(args)...) {}
virtual ~chunk() noexcept = default;
// true if we regen'd, false otherwise
bool draw(const chunks_t& chunks, const shared::player& lp,
const pass& pass, const bool skip_regen = false) noexcept;
bool can_draw() const noexcept { return this->glo.has_value(); }
};
} // namespace world
} // namespace client
#endif
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