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 /*
 359  * Debugging information
 360  */
 361 static void remote_player_network_imgui( m4x4f pv ){
 362    if( !network_client.network_info )
 363       return;
 364
 365    ui_rect panel = { (vg.window_x / 2) - 200, 0, 400, 600 };
 366    ui_fill( panel, (ui_colour(k_ui_bg)&0x00ffffff)|0x50000000 );
 367
 368    char buf[512];
 369    const char *netstatus = "PROGRAMMING ERROR";
 370
 371    struct { enum ESteamNetworkingConnectionState state; const char *str; }
 372    states[] = {
 373            { k_ESteamNetworkingConnectionState_None, "None" },
 374            { k_ESteamNetworkingConnectionState_Connecting,
 375          (const char *[]){"Connecting -",
 376                           "Connecting /",
 377                           "Connecting |",
 378                           "Connecting \\",
 379                           }[(u32)(vg.time_real/0.25) & 0x3 ] },
 380            { k_ESteamNetworkingConnectionState_FindingRoute, "Finding Route" },
 381            { k_ESteamNetworkingConnectionState_Connected, "Connected" },
 382            { k_ESteamNetworkingConnectionState_ClosedByPeer, "Closed by peer" },
 383            { k_ESteamNetworkingConnectionState_ProblemDetectedLocally,
 384          "Problem Detected Locally" },
 385            { k_ESteamNetworkingConnectionState_FinWait, "Fin Wait" },
 386            { k_ESteamNetworkingConnectionState_Linger, "Linger" },
 387            { k_ESteamNetworkingConnectionState_Dead, "Dead" }
 388    };
 389    for( u32 i=0; i<vg_list_size(states); i ++ ){
 390       if( states[i].state == network_client.state ){
 391          netstatus = states[i].str;
 392          break;
 393       }
 394    }
 395    snprintf( buf, 512, "Network: %s", netstatus );
 396    ui_info( panel, buf );
 397    ui_info( panel, "---------------------" );
 398
 399    if( network_client.state == k_ESteamNetworkingConnectionState_Connected ){
 400       ui_info( panel, "#-1: localplayer" );
 401
 402       snprintf( buf, 512, "U%.3f/D%.3fkbs",
 403                 netplayers.up_kbs, netplayers.down_kbs );
 404       ui_info( panel, buf );
 405
 406       for( u32 i=0; i<vg_list_size(netplayers.list); i++ ){
 407          struct network_player *player = &netplayers.list[i];
 408          if( player->active ){
 409             const char *sysname = "invalid";
 410
 411             if( player->subsystem < k_player_subsystem_max ){
 412                sysname = player_subsystems[ player->subsystem ]->name;
 413             }
 414             snprintf( buf, 512, "#%u: %s [%s] D%.1fkbs",
 415                       i, player->username, sysname, player->down_kbs );
 416             ui_info( panel, buf );
 417          }
 418       }
 419    }
 420    else {
 421       ui_info( panel, "offline" );
 422    }
 423 }
 424
 425 /*
 426  * write the remote players final_mtx
 427  */
 428 static void pose_remote_player( u32 index,
 429                                 struct interp_frame *f0,
 430                                 struct interp_frame *f1 ){
 431
 432    struct network_player *player = &netplayers.list[ index ];
 433
 434    struct interp_buffer *buf = &netplayers.interp_data[ index ];
 435    struct skeleton *sk = &localplayer.skeleton;
 436    m4x3f *final_mtx = &netplayers.final_mtx[ sk->bone_count*index ];
 437    struct player_board_pose *board_pose = &netplayers.board_poses[index];
 438
 439    struct player_subsystem_interface *sys0 = player_subsystems[f0->subsystem],
 440                                      *sys1 = NULL;
 441
 442    player_pose pose0, pose1, posed;
 443    sys0->pose( &f0->data, &pose0 );
 444
 445    u8 instance_id = 0;
 446
 447    if( f1 ){
 448       f32 t = (buf->t - f0->timestamp) / (f1->timestamp - f0->timestamp);
 449           t = vg_clampf( t, 0.0f, 1.0f );
 450
 451       sys1 = player_subsystems[f1->subsystem];
 452       sys1->pose( &f1->data, &pose1 );
 453
 454       u16 bounds = f0->boundary_hash^f1->boundary_hash;
 455
 456       if( bounds & NETMSG_BOUNDARY_BIT )
 457          t = 1.0f;
 458
 459       if( bounds & NETMSG_GATE_BOUNDARY_BIT ){
 460          /* TODO: Extra work retransforming the root_co, instance_id.. etc */
 461          t = 1.0f;
 462       }
 463
 464       instance_id = f1->instance_id;
 465
 466       lerp_player_pose( &pose0, &pose1, t, &posed );
 467       apply_full_skeleton_pose( sk, &posed, final_mtx );
 468       memcpy( board_pose, &posed.board, sizeof(*board_pose) );
 469    }
 470    else {
 471       instance_id = f0->instance_id;
 472
 473       apply_full_skeleton_pose( sk, &pose0, final_mtx );
 474       memcpy( board_pose, &pose0.board, sizeof(*board_pose) );
 475    }
 476
 477    if( player->world_match[ instance_id ] )
 478       player->active_world = &world_static.instances[ instance_id ];
 479 }
 480
 481 /*
 482  * animate remote player and store in final_mtx
 483  */
 484 static void animate_remote_player( u32 index ){
 485
 486    /*
 487     * Trys to keep the cursor inside the buffer
 488     */
 489    f64 min_time = -999999999.9,
 490        max_time =  999999999.9,
 491        abs_max_time = -999999999.9;
 492
 493    struct interp_frame *minframe = NULL,
 494                        *maxframe = NULL,
 495                        *abs_max_frame = NULL;
 496
 497    struct interp_buffer *buf = &netplayers.interp_data[index];
 498    for( u32 i=0; i<vg_list_size(buf->frames); i ++ ){
 499       struct interp_frame *ifr = &buf->frames[i];
 500
 501       if( ifr->active ){
 502          if( (ifr->timestamp > min_time) && (ifr->timestamp < buf->t) ){
 503             min_time = ifr->timestamp;
 504             minframe = ifr;
 505          }
 506
 507          if( (ifr->timestamp < max_time) && (ifr->timestamp > buf->t) ){
 508             max_time = ifr->timestamp;
 509             maxframe = ifr;
 510          }
 511
 512          if( ifr->timestamp > abs_max_time ){
 513             abs_max_time = ifr->timestamp;
 514             abs_max_frame = ifr;
 515          }
 516       }
 517    }
 518
 519    struct network_player *player = &netplayers.list[ index ];
 520    if( player->active != 2 )
 521       player->active_world = NULL;
 522
 523    if( minframe && maxframe ){
 524       pose_remote_player( index, minframe, maxframe );
 525       buf->t += vg.time_frame_delta;
 526    }
 527    else {
 528       buf->t = abs_max_time - 0.25;
 529
 530       if( abs_max_frame )
 531          pose_remote_player( index, abs_max_frame, NULL );
 532       else
 533          return;
 534    }
 535 }
 536
 537 /*
 538  * Update full final_mtx for all remote players
 539  */
 540 static void animate_remote_players(void){
 541    for( u32 i=0; i<vg_list_size(netplayers.list); i ++ ){
 542       struct network_player *player = &netplayers.list[i];
 543       if( !player->active ) continue;
 544
 545       animate_remote_player( i );
 546    }
 547 }
 548
 549 /*
 550  * Draw remote players
 551  */
 552 static void render_remote_players( world_instance *world, camera *cam ){
 553    SDL_AtomicLock( &addon_system.sl_cache_using_resources );
 554    struct skeleton *sk = &localplayer.skeleton;
 555
 556    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 557       struct network_player *player = &netplayers.list[i];
 558       if( !player->active || player->isblocked ) continue;
 559       if( player->active_world != world ) continue;
 560
 561       m4x3f *final_mtx = &netplayers.final_mtx[ sk->bone_count*i ];
 562
 563       struct player_model *model =
 564          addon_cache_item_if_loaded( k_addon_type_player,
 565                                      player->playermodel_view_slot );
 566
 567       if( !model ) model = &localplayer.fallback_model;
 568       render_playermodel( cam, world, 0, model, sk, final_mtx );
 569
 570       struct player_board *board =
 571          addon_cache_item_if_loaded( k_addon_type_board,
 572                                      player->board_view_slot );
 573       render_board( cam, world, board, final_mtx[localplayer.id_board],
 574                      &netplayers.board_poses[ i ], k_board_shader_player );
 575    }
 576
 577    SDL_AtomicUnlock( &addon_system.sl_cache_using_resources );
 578 }
 579
 580 static int remote_players_randomize( int argc, const char *argv[] ){
 581    for( int i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 582       struct network_player *player = &netplayers.list[i];
 583
 584       player->active = (vg_randu32() & 0x1)? 2: 0;
 585       player->isfriend = vg_randu32() & vg_randu32() & 0x1;
 586       player->isblocked = vg_randu32() & vg_randu32() & vg_randu32() & 0x1;
 587       player->world_match[ 0 ] = vg_randu32() & 0x1;
 588       player->world_match[ 1 ] = 0;
 589
 590       if( player->world_match[0] )
 591          player->active_world = &world_static.instances[0];
 592       else
 593          player->active_world = NULL;
 594
 595       for( int i=0; i<sizeof(player->username)-1; i ++ ){
 596          player->username[i] = 'a' + (vg_randu32() % 30);
 597          player->username[i+1] = '\0';
 598
 599          if( (vg_randu32() % 8) == 3 )
 600             break;
 601       }
 602
 603       for( int i=0; i<3; i ++ ){
 604          player->medals[i] = vg_randu32() % 3;
 605       }
 606
 607       v3f pos;
 608
 609       vg_rand_sphere( pos );
 610       v3_muladds( localplayer.rb.co, pos, 100.0f,
 611                   netplayers.final_mtx[ i*localplayer.skeleton.bone_count][3] );
 612    }
 613
 614    return 0;
 615 }
 616
 617 static void remote_players_init(void){
 618    vg_console_reg_cmd( "add_test_players", remote_players_randomize, NULL );
 619    vg_console_reg_var( "k_show_own_name", &k_show_own_name,
 620                        k_var_dtype_i32, 0 );
 621    for( u32 i=0; i<NETWORK_SFX_QUEUE_LENGTH; i ++ ){
 622       netplayers.sfx_queue[i].system = k_player_subsystem_invalid;
 623    }
 624 }
 625
 626 static void remote_sfx_pre_update(void){
 627    for( u32 i=0; i<NETWORK_SFX_QUEUE_LENGTH; i ++ ){
 628       struct net_sfx *si = &netplayers.sfx_queue[i];
 629
 630       if( si->system != k_player_subsystem_invalid ){
 631          si->subframe -= vg.time_frame_delta;
 632          if( si->subframe <= 0.0f ){
 633             net_sfx_play( si );
 634             si->system = k_player_subsystem_invalid;
 635          }
 636       }
 637    }
 638 }
 639
 640 /*
 641  * animator->root_co of remote player
 642  */
 643 static void remote_player_position( int id, v3f out_co ){
 644    struct skeleton *sk = &localplayer.skeleton;
 645    m4x3f *final_mtx = &netplayers.final_mtx[ sk->bone_count*id ];
 646    v3_copy( final_mtx[0][3], out_co );
 647 }
 648
 649 enum remote_player_gui_type {
 650    k_remote_player_gui_type_stranger,
 651    k_remote_player_gui_type_friend,
 652    k_remote_player_gui_type_you,
 653 };
 654
 655 /* TODO:
 656  *   line of sight / distance culling
 657  */
 658 static void remote_player_nametag( m4x4f pv, v3f co, const char *name,
 659                                    enum remote_player_gui_type type,
 660                                    u32 medals[3] ){
 661    vg_ui.font = &vg_ui_font_big;
 662    v4f wpos;
 663    v3_copy( co, wpos );
 664    wpos[1] += 2.0f;
 665    wpos[3] = 1.0f;
 666
 667    m4x4_mulv( pv, wpos, wpos );
 668
 669    if( wpos[3] > 0.0f ){
 670       v2_muls( wpos, (1.0f/wpos[3]) * 0.5f, wpos );
 671       v2_add( wpos, (v2f){ 0.5f, 0.5f }, wpos );
 672
 673       vg_ui.font = &vg_ui_font_big;
 674       ui_rect wr;
 675       wr[2] = VG_MAX( ui_text_line_width( name ), 140 ) + 8;
 676       wr[0] = vg_clampf(wpos[0] * vg.window_x, -32000.0f,32000.0f)-(wr[2]/2);
 677       wr[1] = vg_clampf((1.0f-wpos[1]) * vg.window_y, -32000.0f, 32000.0f );
 678       wr[3] = 32;
 679
 680       ui_fill( wr, ui_opacity( ui_colour(k_ui_bg), 0.23f ) );
 681       ui_text( wr, name, 1, k_ui_align_middle_center, 0 );
 682
 683       vg_ui.font = &vg_ui_font_small;
 684
 685       /* medals */
 686       int cols = 0;
 687       if( medals ){
 688          for( int i=0; i<3; i ++ )
 689             if( medals[i] )
 690                cols ++;
 691
 692          char buf[32];
 693          vg_str str;
 694
 695          if( cols ){
 696             f32 w = (f32)wr[2] / (f32)cols;
 697             cols = 0;
 698
 699             for( int i=0; i<3; i ++ ){
 700                if( medals[i] ){
 701                   ui_rect col = { wr[0] + (f32)cols*w, wr[1] + wr[3], w,
 702                                  vg_ui.font->glyph_height };
 703
 704                   vg_strnull( &str, buf, 32 );
 705                   vg_strcatch( &str, (char)k_SRglyph_vg_circle );
 706                   vg_strcati32( &str, medals[i] );
 707
 708                   ui_text( col, buf, 1, k_ui_align_middle_center,
 709                            ui_colour( (enum ui_scheme_colour[]){
 710                               k_ui_yellow, k_ui_gray, k_ui_orange }[i] ) );
 711
 712                   cols ++;
 713                }
 714             }
 715          }
 716       }
 717
 718    }
 719    vg_ui.font = &vg_ui_font_small;
 720 }
 721
 722 static void remote_player_gui_info( ui_rect box,
 723                                     const char *username,
 724                                     const char *activity,
 725                                     enum remote_player_gui_type type,
 726                                     int in_world ){
 727
 728    f32 opacity = in_world? 0.6f: 0.3f;
 729
 730    if( type == k_remote_player_gui_type_you )
 731       ui_fill( box, ui_opacity( 0xff555555, opacity ) );
 732    else
 733       ui_fill( box, ui_opacity( 0xff000000, opacity ) );
 734
 735    if( type == k_remote_player_gui_type_friend )
 736       ui_outline( box, -1, ui_opacity( 0xff00c4f0, opacity ), 0 );
 737
 738    ui_rect top, bottom;
 739    ui_split_ratio( box, k_ui_axis_h, 0.6666f, 1, top, bottom );
 740
 741    u32 fg;
 742
 743    if( type == k_remote_player_gui_type_friend )
 744       fg = ui_colour( k_ui_yellow + (in_world? k_ui_brighter: 0) );
 745    else
 746       fg = ui_colour( in_world? k_ui_fg: k_ui_fg+4 );
 747
 748    vg_ui.font = &vg_ui_font_big;
 749    ui_text( top, username, 1, k_ui_align_middle_center, fg );
 750    vg_ui.font = &vg_ui_font_small;
 751
 752    ui_text( bottom, activity, 1, k_ui_align_middle_center, fg );
 753 }
 754
 755 static void remote_players_imgui_lobby(void){
 756     /*
 757     * TODO: send location string over the network */
 758
 759    ui_px y = 50, width = 200, height = 42, gap = 2,
 760          x = vg.window_x - width;
 761
 762    vg_ui.font = &vg_ui_font_big;
 763    ui_text( (ui_rect){ x, 0, width, height },
 764             "Online Players", 1, k_ui_align_middle_center, 0 );
 765    vg_ui.font = &vg_ui_font_small;
 766
 767
 768    ui_rect us = { x, y, width, height };
 769    /* FIXME: your location */
 770    remote_player_gui_info( us, steam_username_at_startup, "you",
 771                            k_remote_player_gui_type_you, 1 );
 772    y += height + gap;
 773
 774    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i ++ ){
 775       struct network_player *player = &netplayers.list[i];
 776       if( !player->active || player->isblocked ) continue;
 777
 778       int in_same_world = player->active_world != world_current_instance();
 779
 780       if( !player->isfriend && !in_same_world )
 781          continue;
 782
 783       ui_rect box = { x, y, width, height };
 784       remote_player_gui_info( box, player->username, "<null>",
 785                               player->isfriend, in_same_world );
 786       y += height + gap;
 787    }
 788 }
 789
 790 static void remote_players_imgui_world( world_instance *world, m4x4f pv,
 791                                         f32 max_dist, int geo_cull ){
 792    ui_flush( k_ui_shader_colour );
 793
 794    for( u32 i=0; i<NETWORK_MAX_PLAYERS; i++ ){
 795       struct network_player *player = &netplayers.list[i];
 796       if( player->active ){
 797          v3f co;
 798          remote_player_position( i, co );
 799
 800          if( player->active_world != world ){
 801             continue;
 802          }
 803
 804          f32 d2 = v3_dist2( co, localplayer.rb.co );
 805
 806          if( d2 > (max_dist*max_dist) )
 807             continue;
 808
 809          f32 dist = sqrtf(d2);
 810          f32 opacity = 0.95f * sqrtf(((max_dist-dist)/max_dist));
 811
 812          if( geo_cull ){
 813             ray_hit hit;
 814             hit.dist = dist;
 815
 816             v3f dir;
 817             v3_sub( co, skaterift.cam.pos, dir );
 818             v3_normalize( dir );
 819
 820             if( ray_world( world, skaterift.cam.pos, dir, &hit,
 821                            k_material_flag_ghosts ) ){
 822                opacity *= 0.5f;
 823             }
 824          }
 825
 826          player->opacity = vg_lerpf( player->opacity, opacity,
 827                                      vg.time_frame_delta * 2.0f );
 828
 829          remote_player_nametag(
 830                pv,
 831                netplayers.final_mtx[localplayer.skeleton.bone_count*i][3],
 832                player->username, player->isfriend, player->medals );
 833
 834          vg_ui.colour[3] = player->opacity;
 835          ui_flush( k_ui_shader_colour );
 836       }
 837    }
 838
 839    vg_ui.colour[3] = 1.0f;
 840 }