eco2d/code/game/header/entity_view.h

#pragma once
#include "system.h"

#define ZPL_PICO
#include "zpl.h"

typedef enum {
    EKIND_PLAYER = 0,
    EKIND_THING,
    EKIND_CHUNK,
    FORCE_EKIND_UINT16 = UINT16_MAX
} entity_kind;

typedef enum {
    EFLAG_INTERP = (1 << 0),
    FORCE_EFLAG_UINT16 = UINT16_MAX
} entity_flag;

typedef enum {
    ETRAN_NONE,
    ETRAN_FADEOUT,
    ETRAN_FADEIN,
    ETRAN_REMOVE,
    FORCE_ETRAN_UINT8 = UINT8_MAX
} entity_transition_effect;

typedef struct entity_view {
    int64_t ent_id;
    entity_kind kind;
    entity_flag flag;
    float x;
    float y;
    float vx;
    float vy;
    float tx;
    float ty;
    
    // NOTE(zaklaus): internals
    uint8_t layer_id;
    uint64_t last_update;
    
    // NOTE(zaklaus): fade in-out effect
    entity_transition_effect tran_effect;
    float tran_time;
} entity_view;

ZPL_TABLE_DECLARE(, entity_view_tbl, entity_view_tbl_, entity_view);

void entity_view_init(entity_view_tbl *map);
void entity_view_free(entity_view_tbl *map);

void entity_view_update_or_create(entity_view_tbl *map, uint64_t ent_id, entity_view data);
void entity_view_destroy(entity_view_tbl *map, uint64_t ent_id);

entity_view *entity_view_get(entity_view_tbl *map, uint64_t ent_id);
void entity_view_map(entity_view_tbl *map, void (*map_proc)(uint64_t key, entity_view * value));

size_t entity_view_pack_struct(void *data, size_t len, entity_view view);
entity_view entity_view_unpack_struct(void *data, size_t len);

void entity_view_mark_for_removal(entity_view_tbl *map, uint64_t ent_id);
void entity_view_mark_for_fadein(entity_view_tbl *map, uint64_t ent_id);