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
  81    v3f land_target;
  82    v3f land_target_log[22];
  83    u32 land_target_colours[22];
  84    int land_log_count;
  85
  86    v3f handl_target, handr_target,
  87        handl, handr;
  88
  89    /* Camera */
  90    float air_blend;
  91
  92    v3f camera_pos, smooth_localcam;
  93    v2f angles;
  94
  95    struct rewind_frame
  96    {
  97       v3f pos;
  98       v2f ang;
  99    }
 100    *rewind_buffer;
 101    u32 rewind_incrementer,
 102        rewind_length;
 103
 104    float rewind_time;
 105
 106    /* animation */
 107    double jump_time;
 108    float fslide,
 109          fdirz, fdirx,
 110          fstand,
 111          ffly,
 112          fpush,
 113          fairdir,
 114          fsetup,
 115          walk_timer,
 116          fjump,
 117          fonboard,
 118          frun;
 119
 120    float walk;
 121    int step_phase;
 122
 123    /* player model */
 124    struct player_model
 125    {
 126       glmesh mesh;
 127       struct skeleton sk;
 128       struct skeleton_anim *anim_stand,
 129                            *anim_highg,
 130                            *anim_slide,
 131                            *anim_air,
 132                            *anim_push, *anim_push_reverse,
 133                            *anim_ollie, *anim_ollie_reverse,
 134                            *anim_grabs, *anim_stop,
 135                            *anim_walk, *anim_run, *anim_idle,
 136                            *anim_jump;
 137
 138       u32 id_hip,
 139           id_ik_hand_l,
 140           id_ik_hand_r,
 141           id_ik_elbow_l,
 142           id_ik_elbow_r,
 143           id_head;
 144
 145       v3f cam_pos;
 146
 147       struct ragdoll_part
 148       {
 149          u32 bone_id;
 150          v3f offset;
 151
 152          u32 use_limits;
 153          v3f limits[2];
 154
 155          rigidbody  rb;
 156          u32 parent;
 157       }
 158       *ragdoll;
 159       u32 ragdoll_count;
 160
 161       int shoes[2];
 162    }
 163    mdl;
 164 }
 165 player =
 166 {
 167    .collide_front = { .type = k_rb_shape_sphere, .inf.sphere.radius = 0.3f },
 168    .collide_back  = { .type = k_rb_shape_sphere, .inf.sphere.radius = 0.3f }
 169 };
 170
 171 /*
 172  * API
 173  */
 174 static float *player_get_pos(void);
 175 static void player_kill(void);
 176 static float *player_cam_pos(void);
 177 static void player_save_frame(void);
 178 static void player_restore_frame(void);
 179 static void player_save_rewind_frame(void);
 180
 181 /*
 182  * Submodules
 183  */
 184 #include "player_physics.h"
 185 #include "player_ragdoll.h"
 186 #include "player_model.h"
 187 #include "player_animation.h"
 188 #include "player_audio.h"
 189
 190 /*
 191  * -----------------------------------------------------------------------------
 192  *                                    Events
 193  * -----------------------------------------------------------------------------
 194  */
 195
 196 static void player_init(void)                                            /* 1 */
 197 {
 198    rb_init( &player.phys.rb );
 199    rb_init( &player.collide_front );
 200    rb_init( &player.collide_back  );
 201
 202    vg_convar_push( (struct vg_convar){
 203       .name = "walk_speed",
 204       .data = &k_walkspeed,
 205       .data_type = k_convar_dtype_f32,
 206       .opt_f32 = { .clamp = 0 },
 207       .persistent = 1
 208    });
 209
 210    vg_convar_push( (struct vg_convar){
 211       .name = "run_speed",
 212       .data = &k_runspeed,
 213       .data_type = k_convar_dtype_f32,
 214       .opt_f32 = { .clamp = 0 },
 215       .persistent = 1
 216    });
 217
 218    vg_convar_push( (struct vg_convar){
 219       .name = "walk_accel",
 220       .data = &k_walk_accel,
 221       .data_type = k_convar_dtype_f32,
 222       .opt_f32 = { .clamp = 0 },
 223       .persistent = 1
 224    });
 225
 226    vg_convar_push( (struct vg_convar){
 227       .name = "fc",
 228       .data = &freecam,
 229       .data_type = k_convar_dtype_i32,
 230       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 231       .persistent = 1
 232    });
 233
 234    vg_convar_push( (struct vg_convar){
 235       .name = "fcs",
 236       .data = &fc_speed,
 237       .data_type = k_convar_dtype_f32,
 238       .opt_f32 = { .clamp = 0 },
 239       .persistent = 1
 240    });
 241
 242         vg_function_push( (struct vg_cmd){
 243                 .name = "reset",
 244                 .function = reset_player
 245         });
 246
 247    player.rewind_length = 0;
 248    player.rewind_buffer = vg_alloc( sizeof(struct rewind_frame)
 249                                        * PLAYER_REWIND_FRAMES );
 250
 251    /* other systems */
 252    vg_loader_highwater( player_model_init, player_model_free, NULL );
 253 }
 254
 255 static void player_save_rewind_frame(void)
 256 {
 257    if( player.rewind_length < PLAYER_REWIND_FRAMES )
 258    {
 259       struct rewind_frame *fr =
 260          &player.rewind_buffer[ player.rewind_length ++ ];
 261
 262       v2_copy( player.angles, fr->ang );
 263       v3_copy( player.camera_pos, fr->pos );
 264
 265       player.rewind_incrementer = 0;
 266    }
 267 }
 268
 269 /* Deal with input etc */
 270 static void player_update_pre(void)
 271 {
 272    struct player_phys *phys = &player.phys;
 273
 274    if( player.rewinding )
 275    {
 276       return;
 277    }
 278
 279    if( vg_get_button_down( "reset" ) )
 280    {
 281       player.rewinding = 1;
 282       player.rewind_time = (float)player.rewind_length - 0.0001f;
 283       player_save_rewind_frame();
 284
 285       player.is_dead = 0;
 286       player.death_tick_allowance = 30;
 287       player_restore_frame();
 288
 289       if( !phys->on_board )
 290       {
 291          player.angles[0] = atan2f( -phys->rb.forward[2],
 292                                     -phys->rb.forward[0] );
 293       }
 294
 295       player.mdl.shoes[0] = 1;
 296       player.mdl.shoes[1] = 1;
 297
 298       world_routes_notify_reset();
 299
 300       /* apply 1 frame of movement */
 301       player_do_motion();
 302    }
 303
 304    if( vg_get_button_down( "switchmode" ) )
 305    {
 306       phys->on_board ^= 0x1;
 307
 308       if( phys->on_board )
 309       {
 310          v3_muladds( phys->rb.v, phys->rb.forward, 0.2f, phys->rb.v );
 311       }
 312    }
 313 }
 314
 315 static void player_update_fixed(void)                                    /* 2 */
 316 {
 317    if( player.rewinding )
 318       return;
 319
 320    if( player.death_tick_allowance )
 321       player.death_tick_allowance --;
 322
 323    struct player_phys *phys = &player.phys;
 324
 325    if( player.is_dead )
 326    {
 327       player_ragdoll_iter();
 328    }
 329    else
 330    {
 331       player.rewind_incrementer ++;
 332
 333       if( player.rewind_incrementer > (u32)(0.25/VG_TIMESTEP_FIXED) )
 334       {
 335          player_save_rewind_frame();
 336       }
 337
 338       player_do_motion();
 339    }
 340 }
 341
 342 static void player_update_post(void)
 343 {
 344    for( int i=0; i<player.land_log_count; i++ )
 345       vg_line_cross( player.land_target_log[i],
 346             player.land_target_colours[i], 0.25f);
 347
 348    if( player.is_dead )
 349    {
 350       player_debug_ragdoll();
 351
 352       if( !freecam )
 353          player_animate_death_cam();
 354    }
 355    else
 356    {
 357       player_animate();
 358
 359       if( !freecam )
 360          player_animate_camera();
 361    }
 362
 363    if( freecam )
 364       player_freecam();
 365
 366
 367    /* CAMERA POSITIONING: LAYER 0 */
 368    v2_copy( player.angles, camera_angles );
 369    v3_copy( player.camera_pos, camera_pos );
 370
 371    if( player.rewinding )
 372    {
 373       if( player.rewind_time <= 0.0f )
 374       {
 375          player.rewinding = 0;
 376          player.rewind_length = 1;
 377       }
 378       else
 379       {
 380          assert( player.rewind_length > 0 );
 381
 382          v2f override_angles;
 383          v3f override_pos;
 384
 385          float budget         = vg.time_delta,
 386                overall_length = player.rewind_length*0.25f;
 387
 388          for( int i=0; (i<10)&&(player.rewind_time>0.0f)&&(budget>0.0f); i ++ )
 389          {
 390             /* Interpolate frames */
 391             int i0 = floorf( player.rewind_time ),
 392                 i1 = VG_MIN( i0+1, player.rewind_length-1 );
 393
 394             struct rewind_frame *fr =  &player.rewind_buffer[i0],
 395                                 *fr1 = &player.rewind_buffer[i1];
 396
 397             float dist = vg_maxf( v3_dist( fr->pos, fr1->pos ), 0.001f ),
 398                   subl = vg_fractf( player.rewind_time ) + 0.001f,
 399
 400 #if 0
 401                   speed=sqrtf(player.rewind_time*player.rewind_time+11.0f)*3.0f,
 402 #else
 403                   speed = (3.0f-(1.0f/(0.4f+0.4f*player.rewind_time)))*28.0f,
 404 #endif
 405                   mod  = speed * (budget / dist),
 406
 407                   advl = vg_minf( mod, subl ),
 408                   advt = (advl / mod) * budget;
 409
 410             player.rewind_time -= advl;
 411             budget -= advt;
 412          }
 413
 414          player.rewind_time = vg_maxf( 0.0f, player.rewind_time );
 415
 416          int i0 = floorf( player.rewind_time ),
 417              i1 = VG_MIN( i0+1, player.rewind_length-1 );
 418
 419          struct rewind_frame *fr =  &player.rewind_buffer[i0],
 420                              *fr1 = &player.rewind_buffer[i1];
 421
 422          float sub = vg_fractf(player.rewind_time);
 423
 424          v3_lerp( fr->pos, fr1->pos, sub, override_pos );
 425          override_angles[0] = vg_alerpf( fr->ang[0], fr1->ang[0], sub );
 426          override_angles[1] = vg_lerpf ( fr->ang[1], fr1->ang[1], sub );
 427
 428          /* CAMERA POSITIONING: LAYER 1 */
 429          float blend = (4.0f-player.rewind_time) * 0.25f,
 430                c     = vg_clampf( blend, 0.0f, 1.0f );
 431
 432          camera_angles[0] = vg_alerpf(override_angles[0], player.angles[0], c);
 433          camera_angles[1] = vg_lerpf (override_angles[1], player.angles[1], c);
 434          v3_lerp( override_pos, player.camera_pos, c, camera_pos );
 435       }
 436    }
 437
 438    camera_update();
 439    player_audio();
 440 }
 441
 442 static void draw_player( m4x3f cam )
 443 {
 444    if( player.is_dead )
 445       player_model_copy_ragdoll();
 446
 447    shader_viewchar_use();
 448    vg_tex2d_bind( &tex_characters, 0 );
 449    shader_viewchar_uTexMain( 0 );
 450    shader_viewchar_uCamera( cam[3] );
 451    shader_viewchar_uPv( vg.pv );
 452    shader_link_standard_ub( _shader_viewchar.id, 2 );
 453    glUniformMatrix4x3fv( _uniform_viewchar_uTransforms,
 454                          player.mdl.sk.bone_count,
 455                          0,
 456                          (float *)player.mdl.sk.final_mtx );
 457
 458    mesh_bind( &player.mdl.mesh );
 459    mesh_draw( &player.mdl.mesh );
 460 }
 461
 462 /*
 463  * -----------------------------------------------------------------------------
 464  *                              API implementation
 465  * -----------------------------------------------------------------------------
 466  */
 467
 468 static float *player_get_pos(void)
 469 {
 470    return player.phys.rb.co;
 471 }
 472
 473 static void player_kill(void)
 474 {
 475    if( player.death_tick_allowance == 0 )
 476    {
 477       player.is_dead = 1;
 478       player_ragdoll_copy_model( player.phys.rb.v );
 479    }
 480 }
 481
 482 static float *player_cam_pos(void)
 483 {
 484    return player.camera_pos;
 485 }
 486
 487
 488 #endif /* PLAYER_H */