player.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #ifndef PLAYER_H
   6 #define PLAYER_H
   7
   8 #define PLAYER_REWIND_FRAMES 60*4
   9
  10 #include "audio.h"
  11 #include "common.h"
  12 #include "world.h"
  13 #include "skeleton.h"
  14 #include "bvh.h"
  15
  16 static float
  17    k_walkspeed             = 20.0f,  /* no longer used */
  18    k_runspeed              = 20.0f,
  19    k_board_radius          = 0.3f,
  20    k_board_length          = 0.45f,
  21    k_board_allowance       = 0.04f,
  22    //k_friction_lat          = 8.8f,
  23    k_friction_lat          = 12.0f,
  24    k_friction_resistance   = 0.01f,
  25    k_max_push_speed        = 16.0f,
  26    k_push_accel            = 10.0f,
  27    k_push_cycle_rate       = 8.0f,
  28    k_steer_ground          = 2.5f,
  29    k_steer_air             = 3.6f,
  30    k_steer_air_lerp        = 0.3f,
  31    k_pump_force            = 0.0f,
  32    k_downforce             = 5.0f,
  33    k_walk_downforce        = 8.0f,
  34    k_jump_charge_speed     = (1.0f/1.0f),
  35    k_jump_force            = 5.0f,
  36    k_pitch_limit           = 1.5f,
  37    k_look_speed            = 2.0f,
  38    k_walk_accel            = 150.0f,
  39    k_walk_friction         = 8.0f;
  40
  41 static int freecam = 0;
  42 static int walk_grid_iterations = 1;
  43 static float fc_speed = 10.0f;
  44
  45 /*
  46  * -----------------------------------------------------------------------------
  47  *                                  Memory
  48  * -----------------------------------------------------------------------------
  49  */
  50
  51 static struct gplayer
  52 {
  53    /* Physics */
  54    rigidbody collide_front, collide_back;
  55
  56    struct player_phys
  57    {
  58       rigidbody rb, rb_gate_frame;
  59       float iY, siY;   /* Yaw inertia */
  60
  61       v3f a, v_last, m, bob, vl;
  62
  63       /* Utility */
  64       float vswitch, slip, slip_last,
  65             reverse;
  66
  67       float grab, jump, pushing, push_time;
  68       double start_push;
  69       int in_air, on_board, jump_charge, jump_dir;
  70
  71       m3x3f vr,vr_pstep;
  72    }
  73    phys,
  74    phys_gate_frame;
  75
  76    m4x3f visual_transform,
  77          inv_visual_transform;
  78
  79    int is_dead, death_tick_allowance, rewinding;
  80    int rewind_sound_wait;
  81
  82    v3f land_target;
  83    v3f land_target_log[22];
  84    u32 land_target_colours[22];
  85    int land_log_count;
  86
  87    v3f handl_target, handr_target,
  88        handl, handr;
  89
  90    /* Camera */
  91    float air_blend;
  92    float air_time;
  93
  94    v3f camera_pos, smooth_localcam;
  95    v2f angles;
  96
  97    struct rewind_frame
  98    {
  99       v3f pos;
 100       v2f ang;
 101    }
 102    *rewind_buffer;
 103    u32 rewind_incrementer,
 104        rewind_length;
 105
 106    float rewind_time, rewind_total_length, rewind_predicted_time;
 107    double diag_rewind_start, diag_rewind_time;
 108    float dist_accum;
 109
 110    /* animation */
 111    double jump_time;
 112    float fslide,
 113          fdirz, fdirx,
 114          fstand,
 115          ffly,
 116          fpush,
 117          fairdir,
 118          fsetup,
 119          walk_timer,
 120          fjump,
 121          fonboard,
 122          frun;
 123
 124    float walk;
 125    int step_phase;
 126
 127    /* player model */
 128    struct player_model
 129    {
 130       glmesh mesh;
 131       struct skeleton sk;
 132       struct skeleton_anim *anim_stand,
 133                            *anim_highg,
 134                            *anim_slide,
 135                            *anim_air,
 136                            *anim_push, *anim_push_reverse,
 137                            *anim_ollie, *anim_ollie_reverse,
 138                            *anim_grabs, *anim_stop,
 139                            *anim_walk, *anim_run, *anim_idle,
 140                            *anim_jump;
 141
 142       u32 id_hip,
 143           id_ik_hand_l,
 144           id_ik_hand_r,
 145           id_ik_elbow_l,
 146           id_ik_elbow_r,
 147           id_head;
 148
 149       v3f cam_pos;
 150
 151       struct ragdoll_part
 152       {
 153          u32 bone_id;
 154          v3f offset;
 155
 156          u32 use_limits;
 157          v3f limits[2];
 158
 159          rigidbody  rb;
 160          u32 parent;
 161       }
 162       *ragdoll;
 163       u32 ragdoll_count;
 164
 165       int shoes[2];
 166    }
 167    mdl;
 168 }
 169 player =
 170 {
 171    .collide_front = { .type = k_rb_shape_sphere, .inf.sphere.radius = 0.3f },
 172    .collide_back  = { .type = k_rb_shape_sphere, .inf.sphere.radius = 0.3f }
 173 };
 174
 175 /*
 176  * API
 177  */
 178 static float *player_get_pos(void);
 179 static void player_kill(void);
 180 static float *player_cam_pos(void);
 181 static void player_save_frame(void);
 182 static void player_restore_frame(void);
 183 static void player_save_rewind_frame(void);
 184
 185 /*
 186  * Submodules
 187  */
 188 #include "player_physics.h"
 189 #include "player_ragdoll.h"
 190 #include "player_model.h"
 191 #include "player_animation.h"
 192 #include "player_audio.h"
 193
 194 /*
 195  * -----------------------------------------------------------------------------
 196  *                                    Events
 197  * -----------------------------------------------------------------------------
 198  */
 199
 200 static void player_init(void)                                            /* 1 */
 201 {
 202    rb_init( &player.phys.rb );
 203    rb_init( &player.collide_front );
 204    rb_init( &player.collide_back  );
 205
 206    vg_convar_push( (struct vg_convar){
 207       .name = "walk_speed",
 208       .data = &k_walkspeed,
 209       .data_type = k_convar_dtype_f32,
 210       .opt_f32 = { .clamp = 0 },
 211       .persistent = 1
 212    });
 213
 214    vg_convar_push( (struct vg_convar){
 215       .name = "run_speed",
 216       .data = &k_runspeed,
 217       .data_type = k_convar_dtype_f32,
 218       .opt_f32 = { .clamp = 0 },
 219       .persistent = 1
 220    });
 221
 222    vg_convar_push( (struct vg_convar){
 223       .name = "walk_accel",
 224       .data = &k_walk_accel,
 225       .data_type = k_convar_dtype_f32,
 226       .opt_f32 = { .clamp = 0 },
 227       .persistent = 1
 228    });
 229
 230    vg_convar_push( (struct vg_convar){
 231       .name = "fc",
 232       .data = &freecam,
 233       .data_type = k_convar_dtype_i32,
 234       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 235       .persistent = 1
 236    });
 237
 238    vg_convar_push( (struct vg_convar){
 239       .name = "fcs",
 240       .data = &fc_speed,
 241       .data_type = k_convar_dtype_f32,
 242       .opt_f32 = { .clamp = 0 },
 243       .persistent = 1
 244    });
 245
 246         vg_function_push( (struct vg_cmd){
 247                 .name = "reset",
 248                 .function = reset_player
 249         });
 250
 251    player.rewind_length = 0;
 252    player.rewind_buffer = vg_alloc( sizeof(struct rewind_frame)
 253                                        * PLAYER_REWIND_FRAMES );
 254
 255    /* other systems */
 256    vg_loader_highwater( player_model_init, player_model_free, NULL );
 257 }
 258
 259 static void player_save_rewind_frame(void)
 260 {
 261    if( player.rewind_length < PLAYER_REWIND_FRAMES )
 262    {
 263       struct rewind_frame *fr =
 264          &player.rewind_buffer[ player.rewind_length ++ ];
 265
 266       v2_copy( player.angles, fr->ang );
 267       v3_copy( player.camera_pos, fr->pos );
 268
 269       player.rewind_incrementer = 0;
 270
 271       if( player.rewind_length > 1 )
 272       {
 273          player.rewind_total_length +=
 274             v3_dist( player.rewind_buffer[player.rewind_length-1].pos,
 275                      player.rewind_buffer[player.rewind_length-2].pos );
 276       }
 277    }
 278 }
 279
 280 /* Deal with input etc */
 281 static void player_update_pre(void)
 282 {
 283    struct player_phys *phys = &player.phys;
 284
 285    if( player.rewinding )
 286    {
 287       return;
 288    }
 289
 290    if( vg_get_button_down( "reset" ) )
 291    {
 292       double delta = world_routes.time - world_routes.last_use;
 293
 294       if( delta <= RESET_MAX_TIME )
 295       {
 296          player.rewinding = 1;
 297          player.rewind_sound_wait = 1;
 298          player.rewind_time = (float)player.rewind_length - 0.0001f;
 299          player_save_rewind_frame();
 300          audio_lock();
 301          audio_play_oneshot( &audio_rewind[0], 1.0f );
 302          audio_unlock();
 303
 304          /* based on analytical testing. DONT CHANGE!
 305           *
 306           *    time taken: y = (x^(4/5)) * 74.5
 307           *    inverse   : x = (2/149)^(4/5) * y^(4/5)
 308           */
 309
 310          float constant = powf( 2.0f/149.0f, 4.0f/5.0f ),
 311                curve    = powf( player.rewind_total_length, 4.0f/5.0f );
 312
 313          player.rewind_predicted_time = constant * curve;
 314          player.diag_rewind_start = vg.time;
 315          player.diag_rewind_time  = player.rewind_time;
 316
 317          player.is_dead = 0;
 318          player.death_tick_allowance = 30;
 319          player_restore_frame();
 320
 321          if( !phys->on_board )
 322          {
 323             player.angles[0] = atan2f( -phys->rb.forward[2],
 324                                        -phys->rb.forward[0] );
 325          }
 326
 327          player.mdl.shoes[0] = 1;
 328          player.mdl.shoes[1] = 1;
 329
 330          world_routes_notify_reset();
 331
 332          /* apply 1 frame of movement */
 333          player_do_motion();
 334       }
 335    }
 336
 337    if( vg_get_button_down( "switchmode" ) )
 338    {
 339       phys->on_board ^= 0x1;
 340
 341       audio_lock();
 342       if( phys->on_board )
 343       {
 344          v3_muladds( phys->rb.v, phys->rb.forward, 0.2f, phys->rb.v );
 345          audio_play_oneshot( &audio_lands[6], 1.0f );
 346       }
 347       else
 348       {
 349          audio_play_oneshot( &audio_lands[5], 1.0f );
 350       }
 351
 352       audio_unlock();
 353    }
 354 }
 355
 356 static void player_update_fixed(void)                                    /* 2 */
 357 {
 358    if( player.rewinding )
 359       return;
 360
 361    if( player.death_tick_allowance )
 362       player.death_tick_allowance --;
 363
 364    struct player_phys *phys = &player.phys;
 365
 366    if( player.is_dead )
 367    {
 368       player_ragdoll_iter();
 369    }
 370    else
 371    {
 372       player.rewind_incrementer ++;
 373
 374       if( player.rewind_incrementer > (u32)(0.25/VG_TIMESTEP_FIXED) )
 375       {
 376          player_save_rewind_frame();
 377       }
 378
 379       player_do_motion();
 380    }
 381 }
 382
 383 static void player_update_post(void)
 384 {
 385    for( int i=0; i<player.land_log_count; i++ )
 386       vg_line_cross( player.land_target_log[i],
 387             player.land_target_colours[i], 0.25f);
 388
 389    if( player.is_dead )
 390    {
 391       player_debug_ragdoll();
 392
 393       if( !freecam )
 394          player_animate_death_cam();
 395    }
 396    else
 397    {
 398       player_animate();
 399
 400       if( !freecam )
 401          player_animate_camera();
 402    }
 403
 404    if( freecam )
 405       player_freecam();
 406
 407
 408    /* CAMERA POSITIONING: LAYER 0 */
 409    v2_copy( player.angles, camera_angles );
 410    v3_copy( player.camera_pos, camera_pos );
 411
 412    if( player.rewinding )
 413    {
 414       if( player.rewind_time <= 0.0f )
 415       {
 416          double taken = vg.time - player.diag_rewind_start;
 417          vg_success( "Rewind took (rt, pl, tl): %f, %f, %f\n",
 418                            taken, player.diag_rewind_time,
 419                            player.rewind_total_length );
 420
 421          player.rewinding = 0;
 422          player.rewind_length = 1;
 423          player.rewind_total_length = 0.0f;
 424          player.rewind_incrementer = 0;
 425          world.sky_target_rate = 1.0;
 426       }
 427       else
 428       {
 429          world.sky_target_rate = -100.0;
 430          assert( player.rewind_length > 0 );
 431
 432          v2f override_angles;
 433          v3f override_pos;
 434
 435          float budget         = vg.time_delta,
 436                overall_length = player.rewind_length;
 437
 438          world_routes_rollback_time( player.rewind_time / overall_length );
 439
 440          for( int i=0; (i<10)&&(player.rewind_time>0.0f)&&(budget>0.0f); i ++ )
 441          {
 442             /* Interpolate frames */
 443             int i0 = floorf( player.rewind_time ),
 444                 i1 = VG_MIN( i0+1, player.rewind_length-1 );
 445
 446             struct rewind_frame *fr =  &player.rewind_buffer[i0],
 447                                 *fr1 = &player.rewind_buffer[i1];
 448
 449             float dist = vg_maxf( v3_dist( fr->pos, fr1->pos ), 0.001f ),
 450                   subl = vg_fractf( player.rewind_time ) + 0.001f,
 451
 452                   sramp= 3.0f-(1.0f/(0.4f+0.4f*player.rewind_time)),
 453                   speed = sramp*28.0f + 0.5f*player.rewind_time,
 454                   mod  = speed * (budget / dist),
 455
 456                   advl = vg_minf( mod, subl ),
 457                   advt = (advl / mod) * budget;
 458
 459             player.dist_accum += speed * advt;
 460             player.rewind_time -= advl;
 461             budget -= advt;
 462          }
 463
 464 #if 0
 465          if( player.dist_accum >= 5.0f )
 466          {
 467             audio_lock();
 468             audio_player_playclip( &audio_rewind_player, &audio_rewind[4] );
 469             audio_unlock();
 470
 471             player.dist_accum -= 5.0f;
 472          }
 473 #endif
 474
 475          player.rewind_time = vg_maxf( 0.0f, player.rewind_time );
 476
 477          float current_time = vg.time - player.diag_rewind_start,
 478                remaining    = player.rewind_predicted_time - current_time;
 479
 480          if( player.rewind_sound_wait )
 481          {
 482             if( player.rewind_predicted_time >= 6.5f )
 483             {
 484                if( remaining <= 6.5f )
 485                {
 486                   audio_lock();
 487                   audio_play_oneshot( &audio_rewind[3], 1.0f );
 488                   audio_unlock();
 489                   player.rewind_sound_wait = 0;
 490                }
 491             }
 492             else if( player.rewind_predicted_time >= 2.5f )
 493             {
 494                if( remaining <= 2.5f )
 495                {
 496                   audio_lock();
 497                   audio_play_oneshot( &audio_rewind[2], 1.0f );
 498                   audio_unlock();
 499                   player.rewind_sound_wait = 0;
 500                }
 501             }
 502             else if( player.rewind_predicted_time >= 1.5f )
 503             {
 504                if( remaining <= 1.5f )
 505                {
 506                   audio_lock();
 507                   audio_play_oneshot( &audio_rewind[1], 1.0f );
 508                   audio_unlock();
 509                   player.rewind_sound_wait = 0;
 510                }
 511             }
 512
 513
 514          }
 515
 516          int i0 = floorf( player.rewind_time ),
 517              i1 = VG_MIN( i0+1, player.rewind_length-1 );
 518
 519          struct rewind_frame *fr =  &player.rewind_buffer[i0],
 520                              *fr1 = &player.rewind_buffer[i1];
 521
 522          float sub = vg_fractf(player.rewind_time);
 523
 524          v3_lerp( fr->pos, fr1->pos, sub, override_pos );
 525          override_angles[0] = vg_alerpf( fr->ang[0], fr1->ang[0], sub );
 526          override_angles[1] = vg_lerpf ( fr->ang[1], fr1->ang[1], sub );
 527
 528          /* CAMERA POSITIONING: LAYER 1 */
 529          float blend = (4.0f-player.rewind_time) * 0.25f,
 530                c     = vg_clampf( blend, 0.0f, 1.0f );
 531
 532          camera_angles[0] = vg_alerpf(override_angles[0], player.angles[0], c);
 533          camera_angles[1] = vg_lerpf (override_angles[1], player.angles[1], c);
 534          v3_lerp( override_pos, player.camera_pos, c, camera_pos );
 535       }
 536    }
 537
 538    camera_update();
 539    player_audio();
 540 }
 541
 542 static void draw_player( m4x3f cam )
 543 {
 544    if( player.is_dead )
 545       player_model_copy_ragdoll();
 546
 547    shader_viewchar_use();
 548    vg_tex2d_bind( &tex_characters, 0 );
 549    shader_viewchar_uTexMain( 0 );
 550    shader_viewchar_uCamera( cam[3] );
 551    shader_viewchar_uPv( vg.pv );
 552    shader_link_standard_ub( _shader_viewchar.id, 2 );
 553    glUniformMatrix4x3fv( _uniform_viewchar_uTransforms,
 554                          player.mdl.sk.bone_count,
 555                          0,
 556                          (float *)player.mdl.sk.final_mtx );
 557
 558    mesh_bind( &player.mdl.mesh );
 559    mesh_draw( &player.mdl.mesh );
 560 }
 561
 562 /*
 563  * -----------------------------------------------------------------------------
 564  *                              API implementation
 565  * -----------------------------------------------------------------------------
 566  */
 567
 568 static float *player_get_pos(void)
 569 {
 570    return player.phys.rb.co;
 571 }
 572
 573 static void player_kill(void)
 574 {
 575    if( player.death_tick_allowance == 0 )
 576    {
 577       player.is_dead = 1;
 578       player_ragdoll_copy_model( player.phys.rb.v );
 579    }
 580 }
 581
 582 static float *player_cam_pos(void)
 583 {
 584    return player.camera_pos;
 585 }
 586
 587
 588 #endif /* PLAYER_H */