eco2d/code/common/world/world.c

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C
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#include "zpl.h"
#include "librg.h"
#include "modules/general.h"
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#include "modules/net.h"
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#include "world/world.h"
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#include "entity_view.h"
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#include "packets/pkt_send_librg_update.h"
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typedef struct {
uint8_t *data;
uint32_t seed;
uint32_t size;
uint32_t width;
uint32_t height;
uint16_t block_size;
uint16_t chunk_size;
uint16_t world_size;
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uint64_t tracker_update;
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ecs_world_t *ecs;
librg_world *tracker;
world_pkt_reader_proc *reader_proc;
world_pkt_writer_proc *writer_proc;
} world_data;
static world_data world = {0};
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#define WORLD_TRACKER_UPDATE_MS 10
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int32_t world_gen();
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entity_view world_build_entity_view(int64_t e) {
ECS_IMPORT(world_ecs(), General);
entity_view view = {0};
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// TODO(zaklaus): branch out based on ECS tags
const Position *pos = ecs_get(world_ecs(), e, Position);
if (pos) {
view.kind = EKIND_PLAYER;
view.x = pos->x;
view.y = pos->y;
}
const Chunk *chpos = ecs_get(world_ecs(), e, Chunk);
if (chpos) {
view.kind = EKIND_CHUNK;
view.x = chpos->x;
view.y = chpos->y;
}
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return view;
}
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int32_t tracker_write_create(librg_world *w, librg_event *e) {
int64_t owner_id = librg_event_owner_get(w, e);
int64_t entity_id = librg_event_entity_get(w, e);
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size_t actual_length = librg_event_size_get(w, e);
char *buffer = librg_event_buffer_get(w, e);
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return entity_view_pack_struct(buffer, actual_length, world_build_entity_view(entity_id));
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}
int32_t tracker_write_remove(librg_world *w, librg_event *e) {
return 0;
}
int32_t tracker_write_update(librg_world *w, librg_event *e) {
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int64_t entity_id = librg_event_entity_get(w, e);
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size_t actual_length = librg_event_size_get(w, e);
char *buffer = librg_event_buffer_get(w, e);
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return entity_view_pack_struct(buffer, actual_length, world_build_entity_view(entity_id));
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}
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void world_setup_pkt_handlers(world_pkt_reader_proc *reader_proc, world_pkt_writer_proc *writer_proc) {
world.reader_proc = reader_proc;
world.writer_proc = writer_proc;
}
int32_t world_init(int32_t seed, uint16_t block_size, uint16_t chunk_size, uint16_t world_size) {
if (world.data) {
return 0;
}
world.seed = seed;
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world.chunk_size = chunk_size;
world.world_size = world_size;
world.width = chunk_size * world_size;
world.height = chunk_size * world_size;
world.block_size = block_size;
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world.size = world.width * world.height;
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if (world.tracker == NULL) {
world.tracker = librg_world_create();
}
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if (world.tracker == NULL) {
zpl_printf("[ERROR] An error occurred while trying to create a server world.\n");
return WORLD_ERROR_TRACKER_FAILED;
}
/* config our world grid */
librg_config_chunksize_set(world.tracker, block_size * chunk_size, block_size * chunk_size, 0);
librg_config_chunkamount_set(world.tracker, world_size, world_size, 0);
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librg_config_chunkoffset_set(world.tracker, LIBRG_OFFSET_MID, LIBRG_OFFSET_MID, 0);
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librg_event_set(world.tracker, LIBRG_WRITE_CREATE, tracker_write_create);
librg_event_set(world.tracker, LIBRG_WRITE_REMOVE, tracker_write_remove);
librg_event_set(world.tracker, LIBRG_WRITE_UPDATE, tracker_write_update);
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world.data = zpl_malloc(sizeof(uint8_t)*world.size);
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world.tracker_update = 0;
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if (!world.data) {
return WORLD_ERROR_OUTOFMEM;
}
world.ecs = ecs_init();
ecs_set_entity_range(world.ecs, 0, UINT32_MAX);
ECS_IMPORT(world.ecs, General);
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for (int i = 0; i < world_size * world_size; ++i) {
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ecs_entity_t e = ecs_new(world.ecs, 0);
Chunk *chunk = ecs_get_mut(world.ecs, e, Chunk, NULL);
chunk->x = i % world_size - world_size/2;
chunk->y = i / world_size - world_size/2;
librg_chunk chid = librg_chunk_from_chunkpos(world.tracker, chunk->x, chunk->y, 0);
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librg_entity_track(world.tracker, e);
librg_entity_chunk_set(world.tracker, e, chid);
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}
zpl_printf("[INFO] Created a new server world\n");
return world_gen();
}
int32_t world_destroy(void) {
librg_world_destroy(world.tracker);
ecs_fini(world.ecs);
zpl_mfree(world.data);
zpl_memset(&world, 0, sizeof(world));
zpl_printf("[INFO] World was destroyed.\n");
return WORLD_ERROR_NONE;
}
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#define WORLD_LIBRG_BUFSIZ 8192
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static void world_tracker_update(void) {
if (world.tracker_update > zpl_time_rel_ms()) return;
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world.tracker_update = zpl_time_rel_ms() + WORLD_TRACKER_UPDATE_MS;
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ECS_IMPORT(world.ecs, Net);
ecs_query_t *query = ecs_query_new(world.ecs, "Net.ClientInfo");
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ecs_iter_t it = ecs_query_iter(query);
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static char buffer[WORLD_LIBRG_BUFSIZ] = {0};
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while (ecs_query_next(&it)) {
ClientInfo *p = ecs_column(&it, ClientInfo, 1);
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for (int i = 0; i < it.count; i++) {
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size_t datalen = WORLD_LIBRG_BUFSIZ;
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int32_t result = librg_world_write(world_tracker(), p[i].peer, buffer, &datalen, NULL);
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if (result > 0) {
zpl_printf("[info] buffer size was not enough, please increase it by at least: %d\n", result);
} else if (result < 0) {
zpl_printf("[error] an error happened writing the world %d\n", result);
}
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pkt_world_write(MSG_ID_LIBRG_UPDATE, pkt_send_librg_update_encode(buffer, datalen), 1, p[i].view_id, p[i].peer);
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}
}
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}
int32_t world_update() {
ecs_progress(world.ecs, 0);
world_tracker_update();
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return 0;
}
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int32_t world_read(void* data, uint32_t datalen, void *udata) {
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if (world.reader_proc) {
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return world.reader_proc(data, datalen, udata);
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}
return -1;
}
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int32_t world_write(pkt_header *pkt, void *udata) {
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if (world.writer_proc) {
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return world.writer_proc(pkt, udata);
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}
return -1;
}
uint32_t world_buf(uint8_t const **ptr, uint32_t *width) {
ZPL_ASSERT_NOT_NULL(world.data);
ZPL_ASSERT_NOT_NULL(ptr);
*ptr = world.data;
if (width) *width = world.width;
return world.size;
}
ecs_world_t * world_ecs() {
return world.ecs;
}
librg_world * world_tracker() {
return world.tracker;
}
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uint16_t world_block_size(void) {
return world.block_size;
}
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uint16_t world_chunk_size(void) {
return world.chunk_size;
}
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uint16_t world_world_size(void) {
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return world.world_size;
}
#include "world_gen.c"