player_remote.c

   1 #include "player_remote.h"
   2 #include "skeleton.h"
   3 #include "player_render.h"
   4 #include "network_common.h"
   5 #include "addon.h"
   6 #include "font.h"
   7 #include "gui.h"
   8
   9 static i32 k_show_own_name = 0;
  10
  11 static void player_remote_clear( struct network_player *player ){
  12    addon_cache_unwatch( k_addon_type_player, player->playermodel_view_slot );
  13    addon_cache_unwatch( k_addon_type_board, player->board_view_slot );
  14
  15    memset( player, 0, sizeof(*player) );
  16    strcpy( player->username, "unknown" );
  17    player->subsystem = k_player_subsystem_invalid;
  18 }
  19
  20 /*
  21  * re-attatches addon_reg pointers on the remote client if we have the same
  22  * world loaded.
  23  */
  24 static void relink_remote_player_worlds( u32 client_id ){
  25    struct network_player *player = &netplayers.list[client_id];
  26
  27    addon_alias q[2];
  28    addon_uid_to_alias( player->items[k_netmsg_playeritem_world0], &q[0] );
  29    addon_uid_to_alias( player->items[k_netmsg_playeritem_world1], &q[1] );
  30
  31    /*
  32     * currently in 10.23, the hub world will always be the same.
  33     * this might but probably wont change in the future
  34     */
  35    for( u32 i=0; i<k_world_max; i++ ){
  36       addon_reg *reg = world_static.instance_addons[ i ];
  37
  38       player->world_match[i] = 0;
  39
  40       if( reg ){
  41          if( addon_alias_eq( &q[i], &world_static.instance_addons[i]->alias ) )
  42             player->world_match[i] = 1;
  43       }
  44    }
  45 }
  46
  47 /*
  48  * re-attatches addon_reg pointers on the remote client if we have the mod
  49  * installed locally.
  50  *
  51  * Run if local worlds change
  52  */
  53 static void relink_all_remote_player_worlds(void){
  54    for( u32 i=0; i<vg_list_size(netplayers.list); i++ ){
  55       struct network_player *player = &netplayers.list[i];
  56       if( player->active )
  57          relink_remote_player_worlds(i);
  58    }
  59 }
  60
  61 static void player_remote_update_friendflags( struct network_player *remote ){
  62    ISteamFriends *hSteamFriends = SteamAPI_SteamFriends();
  63    remote->isfriend = SteamAPI_ISteamFriends_HasFriend( hSteamFriends,
  64                         remote->steamid, k_EFriendFlagImmediate );
  65    remote->isblocked = SteamAPI_ISteamFriends_HasFriend( hSteamFriends,
  66                         remote->steamid, k_EFriendFlagBlocked );
  67 }
  68
  69 static void player_remote_rx_200_300( SteamNetworkingMessage_t *msg ){
  70    netmsg_blank *tmp = msg->m_pData;
  71
  72    if( tmp->inetmsg_id == k_inetmsg_playerjoin ){
  73       netmsg_playerjoin *playerjoin = msg->m_pData;
  74       if( !packet_minsize( msg, sizeof(*playerjoin) )) return;
  75
  76       if( playerjoin->index < vg_list_size(netplayers.list) ){
  77          struct network_player *player = &netplayers.list[ playerjoin->index ];
  78          player_remote_clear( player );
  79          player->active = 1;
  80          player->steamid = playerjoin->steamid;
  81          player_remote_update_friendflags( player );
  82
  83          /* TODO: interpret the uids */
  84          player->board_view_slot = 0;
  85          player->playermodel_view_slot = 0;
  86
  87          struct interp_buffer *buf = &netplayers.interp_data[playerjoin->index];
  88          buf->t = -99999999.9;
  89          for( u32 i=0; i<vg_list_size(buf->frames); i ++ ){
  90             buf->frames[i].active = 0;
  91          }
  92
  93          vg_info( "#%u joined friend: %d, blocked: %d\n",
  94                   playerjoin->index, player->isfriend, player->isblocked );
  95       }
  96       else {
  97          vg_error( "inetmsg_playerjoin: player index out of range\n" );
  98       }
  99    }
 100    else if( tmp->inetmsg_id == k_inetmsg_playerleave ){
 101       netmsg_playerleave *playerleave = msg->m_pData;
 102       if( !packet_minsize( msg, sizeof(*playerleave) )) return;
 103
 104       if( playerleave->index < vg_list_size(netplayers.list) ){
 105          struct network_player *player = &netplayers.list[ playerleave->index ];
 106          player_remote_clear( player );
 107          player->active = 0;
 108          vg_info( "player leave (%d)\n", playerleave->index );
 109       }
 110       else {
 111          vg_error( "inetmsg_playerleave: player index out of range\n" );
 112       }
 113    }
 114    else if( tmp->inetmsg_id == k_inetmsg_playerusername ){
 115       netmsg_playerusername *update = msg->m_pData;
 116       if( !packet_minsize( msg, sizeof(*update) )) return;
 117
 118       if( update->index < vg_list_size(netplayers.list) ){
 119          struct network_player *player = &netplayers.list[ update->index ];
 120
 121          network_msgstring( update->name, msg->m_cbSize, sizeof(*update),
 122                             player->username, sizeof(player->username) );
 123
 124          vg_info( "#%u changed username to: %s\n",
 125                   update->index, player->username );
 126       }
 127       else {
 128          vg_error( "inetmsg_playerleave: player index out of range\n" );
 129       }
 130    }
 131    else if( tmp->inetmsg_id == k_inetmsg_playerframe ){
 132       u32 datasize = msg->m_cbSize - sizeof(netmsg_playerframe);
 133
 134       if( datasize > sizeof(union interp_animdata) ){
 135          vg_error( "Player frame data exceeds animdata size\n" );
 136          return;
 137       }
 138
 139       netmsg_playerframe *frame = msg->m_pData;
 140       if( frame->client >= vg_list_size(netplayers.list) ){
 141          vg_error( "inetmsg_playerframe: player index out of range\n" );
 142          return;
 143       }
 144
 145       if( frame->subsystem >= k_player_subsystem_max ){
 146          vg_error( "inetmsg_playerframe: subsystem out of range\n" );
 147          return;
 148       }
 149
 150       struct interp_buffer *ib = &netplayers.interp_data[ frame->client ];
 151       struct interp_frame *dest = NULL;
 152
 153       f64 min_time = INFINITY;
 154       for( u32 i=0; i<vg_list_size(ib->frames); i++ ){
 155          struct interp_frame *ifr = &ib->frames[i];
 156
 157          if( !ifr->active ){
 158             dest = ifr;
 159             break;
 160          }
 161
 162          if( ifr->timestamp < min_time ){
 163             min_time = ifr->timestamp;
 164             dest = ifr;
 165          }
 166       }
 167
 168       dest->active = 1;
 169       dest->subsystem = frame->subsystem;
 170       dest->instance_id = frame->instance_id;
 171
 172       bitpack_ctx ctx = {
 173          .mode = k_bitpack_decompress,
 174          .buffer = frame->animdata,
 175          .buffer_len = datasize,
 176          .bytes = 0,
 177       };
 178
 179
 180       /* sfx
 181        * -------------------------------------------------------------*/
 182
 183       for( u32 i=0; i<frame->sound_effects; i ++ ){
 184          struct net_sfx sfx;
 185          net_sfx_exchange( &ctx, &sfx );
 186
 187          f64 t = (frame->timestamp - NETWORK_FRAMERATE) +
 188                  (sfx.subframe*NETWORK_FRAMERATE);
 189
 190          f32 remaining = t - ib->t;
 191
 192          if( remaining <= 0.0f )
 193             net_sfx_play( &sfx );
 194          else{
 195             struct net_sfx *dst = NULL;
 196
 197             for( u32 j=0; j<NETWORK_SFX_QUEUE_LENGTH; j ++ ){
 198                struct net_sfx *sj = &netplayers.sfx_queue[j];
 199                if( sj->system == k_player_subsystem_invalid ){
 200                   dst = sj;
 201                   break;
 202                }
 203
 204                if( sj->priority < sfx.priority )
 205                   dst = sj;
 206             }
 207
 208             *dst = sfx;
 209             dst->subframe = remaining;
 210          }
 211       }
 212
 213       /* animation
 214        * -------------------------------------------------------------*/
 215
 216       dest->timestamp = frame->timestamp;
 217       dest->boundary_hash = frame->boundary_hash;
 218
 219       struct network_player *player = &netplayers.list[ frame->client ];
 220       struct player_subsystem_interface *sys =
 221          player_subsystems[ frame->subsystem ];
 222
 223       if( sys->network_animator_exchange ){
 224          memset( &dest->data, 0, sys->animator_size );
 225          sys->network_animator_exchange( &ctx, &dest->data );
 226       }
 227       else {
 228          bitpack_bytes( &ctx, sys->animator_size, sys->animator_data );
 229       }
 230
 231       player->subsystem = frame->subsystem;
 232       player->down_bytes += msg->m_cbSize;
 233    }
 234    else if( tmp->inetmsg_id == k_inetmsg_playeritem ){
 235       netmsg_playeritem *item = msg->m_pData;
 236       if( !packet_minsize( msg, sizeof(*item)+1 )) return;
 237
 238       if( item->client >= vg_list_size(netplayers.list) ){
 239          vg_error( "inetmsg_playerframe: player index out of range\n" );
 240          return;
 241       }
 242
 243       if( item->type_index >= k_netmsg_playeritem_max ){
 244          vg_warn( "Client #%d invalid equip type %u\n",
 245                   (i32)item->client, (u32)item->type_index );
 246          return;
 247       }
 248
 249       vg_info( "Client #%d equiped: [%s] %s\n",
 250                item->client,
 251                (const char *[]){[k_netmsg_playeritem_board]="board",
 252                                 [k_netmsg_playeritem_player]="player",
 253                                 [k_netmsg_playeritem_world0]="world0",
 254                                 [k_netmsg_playeritem_world1]="world1"
 255                }[item->type_index], item->uid );
 256
 257       struct network_player *player = &netplayers.list[ item->client ];
 258       char *uid = player->items[ item->type_index ];
 259
 260       network_msgstring( item->uid, msg->m_cbSize, sizeof(*item),
 261                          uid, ADDON_UID_MAX );
 262
 263       if( item->type_index == k_netmsg_playeritem_board ){
 264          addon_cache_unwatch( k_addon_type_board, player->board_view_slot );
 265          player->board_view_slot =
 266             addon_cache_create_viewer_from_uid( k_addon_type_board, uid );
 267       }
 268       else if( item->type_index == k_netmsg_playeritem_player ){
 269          addon_cache_unwatch( k_addon_type_player,
 270                               player->playermodel_view_slot );
 271          player->playermodel_view_slot =
 272             addon_cache_create_viewer_from_uid( k_addon_type_player, uid );
 273       }
 274       else if( (item->type_index == k_netmsg_playeritem_world0) ||
 275                (item->type_index == k_netmsg_playeritem_world1) ){
 276          relink_remote_player_worlds( item->client );
 277       }
 278    }
 279 }
 280
 281 /*
 282  * Write localplayer pose to network
 283  */
 284 static void remote_player_send_playerframe(void){
 285    u8 sysid = localplayer.subsystem;
 286    if( sysid >= k_player_subsystem_max ) return;
 287
 288    struct player_subsystem_interface *sys = player_subsystems[sysid];
 289
 290    if( sys->animator_size ){
 291       u32 max_buf_size = sys->animator_size + sizeof(localplayer.sfx_buffer),
 292           base_size = sizeof(struct netmsg_playerframe),
 293           max_packet = base_size + max_buf_size;
 294
 295       netmsg_playerframe *frame = alloca( max_packet );
 296       frame->inetmsg_id = k_inetmsg_playerframe;
 297       frame->client = 0xff;
 298       frame->subsystem = localplayer.subsystem;
 299       frame->instance_id = world_static.active_instance;
 300
 301       bitpack_ctx ctx = {
 302          .mode = k_bitpack_compress,
 303          .buffer = frame->animdata,
 304          .buffer_len = max_buf_size,
 305          .bytes = 0
 306       };
 307
 308       /* sfx
 309        * ---------------------------------------------*/
 310
 311       frame->sound_effects = localplayer.sfx_buffer_count;
 312       for( u32 i=0; i<localplayer.sfx_buffer_count; i ++ )
 313          net_sfx_exchange( &ctx, &localplayer.sfx_buffer[i] );
 314
 315       /* animation
 316        * -----------------------------------------------*/
 317
 318       frame->timestamp = vg.time_real;
 319       frame->boundary_hash = localplayer.boundary_hash;
 320       if( sys->network_animator_exchange )
 321          sys->network_animator_exchange( &ctx, sys->animator_data );
 322       else
 323          bitpack_bytes( &ctx, sys->animator_size, sys->animator_data );
 324
 325       u32 wire_size = base_size + ctx.bytes;
 326       netplayers.up_bytes += wire_size;
 327
 328       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
 329             hSteamNetworkingSockets, network_client.remote,
 330             frame, wire_size,
 331             k_nSteamNetworkingSend_Unreliable, NULL );
 332    }
 333 }
 334
 335 /*
 336  * Updates network traffic stats
 337  */
 338 static void remote_player_debug_update(void){
 339    if( (vg.time_real - netplayers.last_data_measurement) > 1.0 ){
 340       netplayers.last_data_measurement = vg.time_real;
 341       u32 total_down = 0;
 342
 343       for( u32 i=0; i<vg_list_size(netplayers.list); i++ ){
 344          struct network_player *player = &netplayers.list[i];
 345          if( player->active ){
 346             total_down += player->down_bytes;
 347             player->down_kbs = ((f32)player->down_bytes)/1024.0f;
 348             player->down_bytes = 0;
 349          }
 350       }
 351
 352       netplayers.down_kbs = ((f32)total_down)/1024.0f;
 353       netplayers.up_kbs = ((f32)netplayers.up_bytes)/1024.0f;
 354       netplayers.up_bytes = 0;
 355    }
 356 }
 357
 358 static void remote_player_nametag( m4x4f pv, v3f co, const char *name ){
 359    vg_ui.font = &vg_ui_font_big;
 360    v4f wpos;
 361    v3_copy( co, wpos );
 362    wpos[1] += 2.0f;
 363    wpos[3] = 1.0f;
 364
 365    m4x4_mulv( pv, wpos, wpos );
 366
 367    if( wpos[3] > 0.0f ){
 368       v2_muls( wpos, (1.0f/wpos[3]) * 0.5f, wpos );
 369       v2_add( wpos, (v2f){ 0.5f, 0.5f }, wpos );
 370
 371       ui_rect wr;
 372       wr[0] = vg_clampf(wpos[0] * vg.window_x, -32000.0f,32000.0f)-150;
 373       wr[1] = vg_clampf((1.0f-wpos[1]) * vg.window_y,
 374                         -32000.0f,32000.0f);
 375
 376       vg_ui.font = &vg_ui_font_big;
 377       wr[2] = ui_text_line_width( name );
 378       wr[3] = 32;
 379
 380       ui_fill( wr, ui_opacity( ui_colour(k_ui_bg), 0.6f ) );
 381       ui_text( wr, name, 1, k_ui_align_middle_center, 0 );
 382
 383       vg_ui.font = &vg_ui_font_small;
 384
 385    }
 386    vg_ui.font = &vg_ui_font_small;
 387 }
 388
 389 /*
 390  * Debugging information
 391  */
 392 static void remote_player_network_imgui( m4x4f pv ){
 393    if( !network_client.network_info )
 394       return;
 395
 396    ui_rect panel = { (vg.window_x / 2) - 200, 0, 400, 600 };
 397    ui_fill( panel, (ui_colour(k_ui_bg)&0x00ffffff)|0x50000000 );
 398
 399    char buf[512];
 400    const char *netstatus = "PROGRAMMING ERROR";
 401
 402    struct { enum ESteamNetworkingConnectionState state; const char *str; }
 403    states[] = {
 404            { k_ESteamNetworkingConnectionState_None, "None" },
 405            { k_ESteamNetworkingConnectionState_Connecting,
 406          (const char *[]){"Connecting -",
 407                           "Connecting /",
 408                           "Connecting |",
 409                           "Connecting \\",
 410                           }[(u32)(vg.time_real/0.25) & 0x3 ] },
 411            { k_ESteamNetworkingConnectionState_FindingRoute, "Finding Route" },
 412            { k_ESteamNetworkingConnectionState_Connected, "Connected" },
 413            { k_ESteamNetworkingConnectionState_ClosedByPeer, "Closed by peer" },
 414            { k_ESteamNetworkingConnectionState_ProblemDetectedLocally,
 415          "Problem Detected Locally" },
 416            { k_ESteamNetworkingConnectionState_FinWait, "Fin Wait" },
 417            { k_ESteamNetworkingConnectionState_Linger, "Linger" },
 418            { k_ESteamNetworkingConnectionState_Dead, "Dead" }
 419    };
 420    for( u32 i=0; i<vg_list_size(states); i ++ ){
 421       if( states[i].state == network_client.state ){
 422          netstatus = states[i].str;
 423          break;
 424       }
 425    }
 426    snprintf( buf, 512, "Network: %s", netstatus );
 427    ui_info( panel, buf );
 428    ui_info( panel, "---------------------" );
 429
 430    if( network_client.state == k_ESteamNetworkingConnectionState_Connected ){
 431       ui_info( panel, "#-1: localplayer" );
 432
 433       snprintf( buf, 512, "U%.3f/D%.3fkbs",
 434                 netplayers.up_kbs, netplayers.down_kbs );
 435       ui_info( panel, buf );
 436
 437       for( u32 i=0; i<vg_list_size(netplayers.list); i++ ){
 438          struct network_player *player = &netplayers.list[i];
 439          if( player->active ){
 440             const char *sysname = "invalid";
 441
 442             if( player->subsystem < k_player_subsystem_max ){
 443                sysname = player_subsystems[ player->subsystem ]->name;
 444             }
 445             snprintf( buf, 512, "#%u: %s [%s] D%.1fkbs",
 446                       i, player->username, sysname, player->down_kbs );
 447             ui_info( panel, buf );
 448          }
 449       }
 450    }
 451    else {
 452       ui_info( panel, "offline" );
 453    }
 454 }
 455
 456 /*
 457  * write the remote players final_mtx
 458  */
 459 static void pose_remote_player( u32 index,
 460                                 struct interp_frame *f0,
 461                                 struct interp_frame *f1 ){
 462
 463    struct network_player *player = &netplayers.list[ index ];
 464
 465    struct interp_buffer *buf = &netplayers.interp_data[ index ];
 466    struct skeleton *sk = &localplayer.skeleton;
 467    m4x3f *final_mtx = &netplayers.final_mtx[ sk->bone_count*index ];
 468    struct player_board_pose *board_pose = &netplayers.board_poses[index];
 469
 470    struct player_subsystem_interface *sys0 = player_subsystems[f0->subsystem],
 471                                      *sys1 = NULL;
 472
 473    player_pose pose0, pose1, posed;
 474    sys0->pose( &f0->data, &pose0 );
 475
 476    u8 instance_id = 0;
 477
 478    if( f1 ){
 479       f32 t = (buf->t - f0->timestamp) / (f1->timestamp - f0->timestamp);
 480           t = vg_clampf( t, 0.0f, 1.0f );
 481
 482       sys1 = player_subsystems[f1->subsystem];
 483       sys1->pose( &f1->data, &pose1 );
 484
 485       u16 bounds = f0->boundary_hash^f1->boundary_hash;
 486
 487       if( bounds & NETMSG_BOUNDARY_BIT )
 488          t = 1.0f;
 489
 490       if( bounds & NETMSG_GATE_BOUNDARY_BIT ){
 491          /* TODO: Extra work retransforming the root_co, instance_id.. etc */
 492          t = 1.0f;
 493       }
 494
 495       instance_id = f1->instance_id;
 496
 497       lerp_player_pose( &pose0, &pose1, t, &posed );
 498       apply_full_skeleton_pose( sk, &posed, final_mtx );
 499       memcpy( board_pose, &posed.board, sizeof(*board_pose) );
 500    }
 501    else {
 502       instance_id = f0->instance_id;
 503
 504       apply_full_skeleton_pose( sk, &pose0, final_mtx );
 505       memcpy( board_pose, &pose0.board, sizeof(*board_pose) );
 506    }
 507
 508    if( player->world_match[ instance_id ] )
 509       player->active_world = &world_static.instances[ instance_id ];
 510 }
 511
 512 /*
 513  * animate remote player and store in final_mtx
 514  */
 515 static void animate_remote_player( u32 index ){
 516
 517    /*
 518     * Trys to keep the cursor inside the buffer
 519     */
 520    f64 min_time = -999999999.9,
 521        max_time =  999999999.9,
 522        abs_max_time = -999999999.9;
 523
 524    struct interp_frame *minframe = NULL,
 525                        *maxframe = NULL,
 526                        *abs_max_frame = NULL;
 527
 528    struct interp_buffer *buf = &netplayers.interp_data[index];
 529    for( u32 i=0; i<vg_list_size(buf->frames); i ++ ){
 530       struct interp_frame *ifr = &buf->frames[i];
 531
 532       if( ifr->active ){
 533          if( (ifr->timestamp > min_time) && (ifr->timestamp < buf->t) ){
 534             min_time = ifr->timestamp;
 535             minframe = ifr;
 536          }
 537
 538          if( (ifr->timestamp < max_time) && (ifr->timestamp > buf->t) ){
 539             max_time = ifr->timestamp;
 540             maxframe = ifr;
 541          }
 542
 543          if( ifr->timestamp > abs_max_time ){
 544             abs_max_time = ifr->timestamp;
 545             abs_max_frame = ifr;
 546          }
 547       }
 548    }
 549
 550    struct network_player *player = &netplayers.list[ index ];
 551    player->active_world = NULL;
 552
 553    if( minframe && maxframe ){
 554       pose_remote_player( index, minframe, maxframe );
 555       buf->t += vg.time_frame_delta;
 556    }
 557    else {
 558       buf->t = abs_max_time - 0.25;
 559
 560       if( abs_max_frame )
 561          pose_remote_player( index, abs_max_frame, NULL );
 562       else
 563          return;
 564    }
 565 }
 566
 567 /*
 568  * Update full final_mtx for all remote players
 569  */
 570 static void animate_remote_players(void){
 571    for( u32 i=0; i<vg_list_size(netplayers.list); i ++ ){
 572       struct network_player *player = &netplayers.list[i];
 573       if( !player->active ) continue;
 574
 575       animate_remote_player( i );
 576    }
 577 }
 578
 579 /*
 580  * Draw remote players
 581  */
 582 static void render_remote_players( world_instance *world, camera *cam ){
 583    SDL_AtomicLock( &addon_system.sl_cache_using_resources );
 584    struct skeleton *sk = &localplayer.skeleton;
 585
 586    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 587       struct network_player *player = &netplayers.list[i];
 588       if( !player->active || player->isblocked ) continue;
 589       if( player->active_world != world ) continue;
 590
 591       m4x3f *final_mtx = &netplayers.final_mtx[ sk->bone_count*i ];
 592
 593       struct player_model *model =
 594          addon_cache_item_if_loaded( k_addon_type_player,
 595                                      player->playermodel_view_slot );
 596
 597       if( !model ) model = &localplayer.fallback_model;
 598       render_playermodel( cam, world, 0, model, sk, final_mtx );
 599
 600       struct player_board *board =
 601          addon_cache_item_if_loaded( k_addon_type_board,
 602                                      player->board_view_slot );
 603       render_board( cam, world, board, final_mtx[localplayer.id_board],
 604                      &netplayers.board_poses[ i ], k_board_shader_player );
 605    }
 606
 607    SDL_AtomicUnlock( &addon_system.sl_cache_using_resources );
 608 }
 609
 610 static void render_remote_player_nametag( v3f co, const char *name ){
 611    m4x3f mlocal;
 612    m4x3_identity( mlocal );
 613    mlocal[3][0] -= font3d_string_width( 2, name ) * 0.5f;
 614
 615    m4x3f mmdl;
 616    m3x3_identity( mmdl );
 617    for( int i=0; i<3; i++ )
 618       v3_muls( skaterift.cam.mtx.v[i], 0.2f, mmdl[i] );
 619    m3x3_transpose( mmdl, mmdl );
 620    v3_add( co, (v3f){0.0f,2.0f,0.0f}, mmdl[3] );
 621
 622    m4x3_mul( mmdl, mlocal, mmdl );
 623    font3d_simple_draw( 2, name, &skaterift.cam, mmdl );
 624 }
 625
 626 static void render_remote_players_tags( world_instance *world, camera *cam ){
 627    glEnable(GL_BLEND);
 628    glEnable(GL_DEPTH_TEST);
 629    glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 630    glBlendEquation(GL_FUNC_ADD);
 631
 632    font3d_bind( &gui.font, k_font_shader_default, 1, NULL, &skaterift.cam );
 633    font3d_setcolour( (v4f){1.0f,1.0f,1.0f,1.0f} );
 634
 635    if( k_show_own_name ){
 636       render_remote_player_nametag(
 637             localplayer.final_mtx[0][3],
 638             steam_username_at_startup );
 639    }
 640
 641    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 642       struct network_player *player = &netplayers.list[i];
 643       if( !player->active || player->isblocked ) continue;
 644       if( player->active_world != world ) continue;
 645
 646       render_remote_player_nametag(
 647             netplayers.final_mtx[localplayer.skeleton.bone_count*i][3],
 648             player->username );
 649    }
 650
 651    glDisable(GL_BLEND);
 652 }
 653
 654 static int remote_players_randomize( int argc, const char *argv[] ){
 655    for( int i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 656       struct network_player *player = &netplayers.list[i];
 657
 658       player->active = vg_randu32() & 0x1;
 659       player->isfriend = vg_randu32() & vg_randu32() & 0x1;
 660       player->isblocked = vg_randu32() & vg_randu32() & vg_randu32() & 0x1;
 661       player->world_match[ 0 ] = vg_randu32() & 0x1;
 662       player->world_match[ 1 ] = 0;
 663
 664       for( int i=0; i<sizeof(player->username)-1; i ++ ){
 665          player->username[i] = 'a' + (vg_randu32() % 30);
 666          player->username[i+1] = '\0';
 667
 668          if( (vg_randu32() % 8) == 3 )
 669             break;
 670       }
 671    }
 672
 673    return 0;
 674 }
 675
 676 static void remote_players_init(void){
 677    vg_console_reg_cmd( "add_test_players", remote_players_randomize, NULL );
 678    vg_console_reg_var( "k_show_own_name", &k_show_own_name,
 679                        k_var_dtype_i32, 0 );
 680    for( u32 i=0; i<NETWORK_SFX_QUEUE_LENGTH; i ++ ){
 681       netplayers.sfx_queue[i].system = k_player_subsystem_invalid;
 682    }
 683 }
 684
 685 static void remote_sfx_pre_update(void){
 686    for( u32 i=0; i<NETWORK_SFX_QUEUE_LENGTH; i ++ ){
 687       struct net_sfx *si = &netplayers.sfx_queue[i];
 688
 689       if( si->system != k_player_subsystem_invalid ){
 690          si->subframe -= vg.time_frame_delta;
 691          if( si->subframe <= 0.0f ){
 692             net_sfx_play( si );
 693             si->system = k_player_subsystem_invalid;
 694          }
 695       }
 696    }
 697 }
 698
 699 enum remote_player_gui_type {
 700    k_remote_player_gui_type_stranger,
 701    k_remote_player_gui_type_friend,
 702    k_remote_player_gui_type_you,
 703 };
 704
 705 static void remote_player_gui_info( ui_rect box,
 706                                     const char *username,
 707                                     const char *activity,
 708                                     enum remote_player_gui_type type,
 709                                     int in_world ){
 710
 711    f32 opacity = in_world? 0.6f: 0.3f;
 712
 713    if( type == k_remote_player_gui_type_you )
 714       ui_fill( box, ui_opacity( 0xff555555, opacity ) );
 715    else
 716       ui_fill( box, ui_opacity( 0xff000000, opacity ) );
 717
 718    if( type == k_remote_player_gui_type_friend )
 719       ui_outline( box, -1, ui_opacity( 0xff00c4f0, opacity ), 0 );
 720
 721    ui_rect top, bottom;
 722    ui_split_ratio( box, k_ui_axis_h, 0.6666f, 1, top, bottom );
 723
 724    u32 fg = ui_colour( in_world? k_ui_fg: k_ui_fg+4 );
 725
 726    vg_ui.font = &vg_ui_font_big;
 727    ui_text( top, username, 1, k_ui_align_middle_center, fg );
 728    vg_ui.font = &vg_ui_font_small;
 729
 730    ui_text( bottom, activity, 1, k_ui_align_middle_center, fg );
 731 }
 732
 733 static void remote_players_imgui_lobby(void){
 734     /*
 735     * TODO: send location string over the network */
 736
 737    ui_px y = 50, width = 200, height = 42, gap = 2,
 738          x = vg.window_x - width;
 739
 740    vg_ui.font = &vg_ui_font_big;
 741    ui_text( (ui_rect){ x, 0, width, height },
 742             "Online Players", 1, k_ui_align_middle_center, 0 );
 743    vg_ui.font = &vg_ui_font_small;
 744
 745
 746    ui_rect us = { x, y, width, height };
 747    /* FIXME: your location */
 748    remote_player_gui_info( us, steam_username_at_startup, "you",
 749                            k_remote_player_gui_type_you, 1 );
 750    y += height + gap;
 751
 752    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 753       struct network_player *player = &netplayers.list[i];
 754       if( !player->active || player->isblocked ) continue;
 755
 756       ui_rect box = { x, y, width, height };
 757       remote_player_gui_info(
 758             box, player->username, "<null>",
 759             player->isfriend,
 760             player->world_match[ world_static.active_instance ] );
 761       y += height + gap;
 762    }
 763 }
 764
 765 static void remote_players_imgui_world( world_instance *world, m4x4f pv,
 766                                         f32 max_dist ){
 767    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i++ ){
 768       struct network_player *player = &netplayers.list[i];
 769       if( player->active ){
 770          remote_player_nametag(
 771                pv,
 772                netplayers.final_mtx[localplayer.skeleton.bone_count*i][3],
 773                player->username );
 774       }
 775    }
 776 }