3 #include "client/blockmesh.h"
4 #include "client/facecache.h"
5 #include "client/client_map.h"
6 #include "client/client_player.h"
7 #include "client/debug_menu.h"
9 #define MAX_BLOCK_REQUESTS 4
11 struct ClientMap client_map;
15 // dequeue callback to thread-safely update
16 static void set_dequeued(void *arg)
18 MapBlock *block = arg;
20 pthread_mutex_lock(&block->mtx);
21 ((MapBlockExtraData *) block->extra)->queue = false;
22 pthread_mutex_unlock(&block->mtx);
25 // mesh generator step
26 static void meshgen_step()
30 if ((block = queue_dequeue_callback(client_map.queue, &set_dequeued)))
31 blockmesh_make(block);
36 // pthread start routine for meshgen thread
37 static void *meshgen_thread(unused void *arg)
39 while (! client_map.cancel)
47 // send block request command to server
48 static void request_position(v3s32 pos)
50 dragonnet_peer_send_ToServerRequestBlock(client, &(ToServerRequestBlock) {
55 // mapblock synchronisation step
56 static void sync_step()
59 static v3s32 *old_requested_positions = NULL;
60 static size_t old_requested_positions_count = 0;
62 u64 last_tick = tick++;
64 v3f64 player_pos = client_player_get_position();
65 v3s32 center = map_node_to_block_pos((v3s32) {player_pos.x, player_pos.y, player_pos.z}, NULL);
67 v3s32 *requested_positions = malloc(sizeof(v3s32) * MAX_BLOCK_REQUESTS);
68 size_t requested_positions_count = 0;
70 for (size_t i = 0; i < client_map.blocks_count; i++) {
71 v3s32 pos = facecache_face(i, ¢er);
72 MapBlock *block = map_get_block(client_map.map, pos, false);
75 pthread_mutex_lock(&block->mtx);
76 MapBlockExtraData *extra = block->extra;
78 switch (extra->state) {
80 if (extra->last_synced < last_tick)
81 request_position(pos);
85 extra->state = MBS_READY;
86 extra->last_synced = tick;
92 pthread_mutex_unlock(&block->mtx);
93 } else if (requested_positions_count < MAX_BLOCK_REQUESTS) {
94 bool should_request = true;
96 for (size_t i = 0; i < old_requested_positions_count; i++) {
97 if (v3s32_equals(old_requested_positions[i], pos)) {
98 should_request = false;
104 request_position(pos);
106 requested_positions[requested_positions_count++] = pos;
110 if (old_requested_positions)
111 free(old_requested_positions);
113 old_requested_positions = requested_positions;
114 old_requested_positions_count = requested_positions_count;
117 // pthread start routine for sync thread
118 static void *sync_thread(unused void *arg)
120 while (! client_map.cancel)
127 // note: all these functions require the block mutex to be locked, which is always the case when a map callback is invoked
129 // callback for initializing a newly created block
130 // allocate and initialize extra data
131 static void on_create_block(MapBlock *block)
133 MapBlockExtraData *extra = block->extra = malloc(sizeof(MapBlockExtraData));
135 extra->state = MBS_RECIEVING;
136 extra->queue = false;
137 extra->last_synced = 0;
141 // callback for deleting a block
143 static void on_delete_block(MapBlock *block)
148 // callback for determining whether a block should be returned by map_get_block
149 // hold back blocks that have not been fully read from server yet when the create flag is set to true
150 static bool on_get_block(MapBlock *block, bool create)
152 return create || ((MapBlockExtraData *) block->extra)->state > MBS_RECIEVING;
157 // ClientMap singleton constructor
158 void client_map_init()
160 client_map.map = map_create((MapCallbacks) {
161 .create_block = &on_create_block,
162 .delete_block = &on_delete_block,
163 .get_block = &on_get_block,
165 .after_set_node = NULL,
167 client_map.queue = queue_create();
168 client_map.cancel = false;
169 client_map.sync_thread = 0;
170 client_map_set_simulation_distance(10);
172 for (int i = 0; i < NUM_MESHGEN_THREADS; i++)
173 client_map.meshgen_threads[i] = 0;
176 // ClientMap singleton destructor
177 void client_map_deinit()
179 queue_delete(client_map.queue);
180 map_delete(client_map.map);
183 // start meshgen and sync threads
184 void client_map_start()
186 for (int i = 0; i < NUM_MESHGEN_THREADS; i++)
187 pthread_create(&client_map.meshgen_threads[i], NULL, &meshgen_thread, NULL);
189 pthread_create(&client_map.sync_thread, NULL, &sync_thread, NULL);
192 // stop meshgen and sync threads
193 void client_map_stop()
195 client_map.cancel = true;
197 for (int i = 0; i < NUM_MESHGEN_THREADS; i++)
198 if (client_map.meshgen_threads[i])
199 pthread_join(client_map.meshgen_threads[i], NULL);
201 if (client_map.sync_thread)
202 pthread_join(client_map.sync_thread, NULL);
205 // update simulation distance
206 void client_map_set_simulation_distance(u32 simulation_distance)
208 client_map.simulation_distance = simulation_distance;
209 client_map.blocks_count = facecache_count(simulation_distance);
212 // called when a block was actually recieved from server
213 void client_map_block_received(MapBlock *block)
215 pthread_mutex_lock(&block->mtx);
216 MapBlockExtraData *extra = block->extra;
217 if (extra->state == MBS_RECIEVING)
218 extra->state = MBS_FRESH;
219 pthread_mutex_unlock(&block->mtx);
221 client_map_schedule_update_block_mesh(block);
223 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x + 1, block->pos.y + 0, block->pos.z + 0}, false));
224 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x + 0, block->pos.y + 1, block->pos.z + 0}, false));
225 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x + 0, block->pos.y + 0, block->pos.z + 1}, false));
226 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x - 1, block->pos.y - 0, block->pos.z - 0}, false));
227 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x - 0, block->pos.y - 1, block->pos.z - 0}, false));
228 client_map_schedule_update_block_mesh(map_get_block(client_map.map, (v3s32) {block->pos.x - 0, block->pos.y - 0, block->pos.z - 1}, false));
231 // enqueue block to mesh update queue
232 void client_map_schedule_update_block_mesh(MapBlock *block)
237 pthread_mutex_lock(&block->mtx);
238 MapBlockExtraData *extra = block->extra;
239 if (! extra->queue) {
241 queue_enqueue(client_map.queue, block);
243 pthread_mutex_unlock(&block->mtx);