main.c

   1 #define VG_3D
   2 #define VG_FRAMEBUFFER_RESIZE 1
   3 #include "vg/vg.h"
   4
   5 /* Resources */
   6 vg_tex2d tex_norwey = { .path = "textures/norway_foliage.qoi" };
   7 vg_tex2d tex_grid = { .path = "textures/grid.qoi" };
   8 vg_tex2d tex_sky = { .path = "textures/sky.qoi" };
   9 vg_tex2d tex_gradients = { .path = "textures/gradients.qoi",
  10                            .flags = VG_TEXTURE_CLAMP };
  11 vg_tex2d tex_cement = { .path = "textures/cement512.qoi" };
  12 vg_tex2d tex_pallet = { .path = "textures/ch_gradient.qoi" };
  13
  14 vg_tex2d *texture_list[] =
  15 {
  16    &tex_norwey,
  17    &tex_gradients,
  18    &tex_grid,
  19    &tex_sky,
  20    &tex_cement,
  21    &tex_pallet
  22 };
  23
  24 SHADER_DEFINE( shader_blit,
  25    "layout (location=0) in vec2 a_co;"
  26    "out vec2 aUv;"
  27    ""
  28         "void main()"
  29         "{"
  30                 "gl_Position = vec4(a_co*2.0-1.0,0.0,1.0);"
  31       "aUv = a_co;"
  32         "}",
  33
  34    /* Fragment */
  35         "out vec4 FragColor;"
  36         ""
  37    "uniform sampler2D uTexMain;"
  38    ""
  39    "in vec2 aUv;"
  40    ""
  41         "void main()"
  42         "{"
  43       "FragColor = texture( uTexMain, aUv );"
  44         "}"
  45         ,
  46         UNIFORMS({ "uTexMain" })
  47 )
  48
  49 /* Convars */
  50 static int freecam = 0;
  51 static int debugview = 0;
  52 static int debugsdf = 0;
  53 static int sv_debugcam = 0;
  54 static int sv_phys = 0;
  55 static int thirdperson = 0;
  56 static int clock_divider = 1;
  57 static int replay_record = 0;
  58
  59 static m4x3f *replay_buffer = NULL;
  60 static int replay_buffer_frame = 0;
  61
  62 #define REPLAY_LENGTH 120*60
  63
  64 /* Components */
  65 #include "road.h"
  66 #include "scene.h"
  67 #include "ik.h"
  68 #include "character.h"
  69 #include "terrain.h"
  70 #include "ragdoll.h"
  71 #include "rigidbody.h"
  72
  73 int main( int argc, char *argv[] )
  74 {
  75    vg_init( argc, argv, "Voyager Game Engine" );
  76 }
  77
  78 m4x3f world_matrix;
  79
  80 static struct gplayer
  81 {
  82    /* Physics */
  83    v3f co, v, a;
  84    v4f rot;
  85    float vswitch, slip, slip_last,
  86          reverse;
  87
  88    float iY;   /* Yaw inertia */
  89    int in_air, is_dead;
  90
  91    /* Input */
  92    v2f joy_l;
  93
  94    v3f view;
  95    v3f follow;
  96    v2f look_dir;  /* TEMP */
  97    v2f board_xy;
  98    float grab;
  99    float pitch;
 100
 101    v3f land_target;
 102    v3f land_target_log[22];
 103    u32 land_target_colours[22];
 104    int land_log_count;
 105    m3x3f vr;
 106
 107    m4x3f to_world, to_local;
 108
 109    struct character mdl;
 110
 111    v3f handl_target, handr_target,
 112        handl, handr;
 113 }
 114 player;
 115
 116 static struct gworld
 117 {
 118    scene geo;
 119    submodel sm_road, sm_terrain;
 120
 121    v3f tutorial;
 122 }
 123 world;
 124
 125 static struct grender
 126 {
 127    GLuint fb_background,
 128           rgb_background;
 129
 130    glmesh fsquad;
 131 }
 132 render;
 133
 134 rigidbody mr_box = {
 135    .bbx = {{ -1.0f, -0.25f, -0.25f }, { 1.0f, 0.25f, 0.25f }}
 136 };
 137
 138 rigidbody mrs_box = {
 139    .bbx = {{ -0.5f, -0.25f, -0.25f }, { 0.5f, 0.25f, 0.25f }}
 140 };
 141
 142 static void player_transform_update(void)
 143 {
 144    q_normalize( player.rot );
 145    q_m3x3( player.rot, player.to_world );
 146    v3_copy( player.co, player.to_world[3] );
 147
 148    m4x3_invert_affine( player.to_world, player.to_local );
 149 }
 150
 151 static int reset_player( int argc, char const *argv[] )
 152 {
 153    v3_zero( player.co );
 154
 155    if( argc == 1 )
 156    {
 157       if( !strcmp( argv[0], "tutorial" ))
 158          v3_copy( world.tutorial, player.co );
 159    }
 160
 161    v3_copy( (v3f){ 0.0f, 0.0f, -0.2f }, player.v );
 162    q_identity( player.rot );
 163    player.vswitch = 1.0f;
 164    player.slip_last = 0.0f;
 165    player.is_dead = 0;
 166    player.in_air = 1;
 167    m3x3_identity( player.vr );
 168
 169    player.mdl.shoes[0] = 1;
 170    player.mdl.shoes[1] = 1;
 171
 172    player_transform_update();
 173    return 0;
 174 }
 175
 176 static int playermodel( int argc, char const *argv[] )
 177 {
 178    if( argc < 1 ) return 0;
 179
 180    glmesh old_mesh = player.mdl.mesh;
 181
 182    if( character_load( &player.mdl, argv[0] ) )
 183       mesh_free( &old_mesh );
 184
 185    return 1;
 186 }
 187
 188 void vg_register(void)
 189 {
 190    scene_register();
 191    character_shader_register();
 192    SHADER_INIT( shader_blit );
 193 }
 194
 195 void vg_start(void)
 196 {
 197    replay_buffer = malloc( sizeof(m4x3f) * REPLAY_LENGTH * (PART_COUNT) );
 198
 199    vg_tex2d_init( texture_list, vg_list_size( texture_list ) );
 200
 201    rb_init( &mr_box );
 202    rb_init( &mrs_box );
 203    mrs_box.co[2] += 2.0f;
 204
 205    vg_convar_push( (struct vg_convar){
 206       .name = "frame",
 207       .data = &replay_buffer_frame,
 208       .data_type = k_convar_dtype_i32,
 209       .opt_i32 = { .min=0, .max=REPLAY_LENGTH-1, .clamp=1 },
 210       .persistent = 0
 211    });
 212
 213    vg_convar_push( (struct vg_convar){
 214       .name = "rec",
 215       .data = &replay_record,
 216       .data_type = k_convar_dtype_i32,
 217       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 218       .persistent = 0
 219    });
 220
 221    vg_convar_push( (struct vg_convar){
 222       .name = "freecam",
 223       .data = &freecam,
 224       .data_type = k_convar_dtype_i32,
 225       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 226       .persistent = 1
 227    });
 228
 229    vg_convar_push( (struct vg_convar){
 230       .name = "debugcam",
 231       .data = &sv_debugcam,
 232       .data_type = k_convar_dtype_i32,
 233       .opt_i32 = { .min=0, .max=1, .clamp=0 },
 234       .persistent = 1
 235    });
 236
 237    vg_convar_push( (struct vg_convar){
 238       .name = "debugview",
 239       .data = &debugview,
 240       .data_type = k_convar_dtype_i32,
 241       .opt_i32 = { .min=0, .max=1, .clamp=0 },
 242       .persistent = 1
 243    });
 244
 245    vg_convar_push( (struct vg_convar){
 246       .name = "debugsdf",
 247       .data = &debugsdf,
 248       .data_type = k_convar_dtype_i32,
 249       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 250       .persistent = 1
 251    });
 252
 253    vg_convar_push( (struct vg_convar){
 254       .name = "phys",
 255       .data = &sv_phys,
 256       .data_type = k_convar_dtype_i32,
 257       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 258       .persistent = 1
 259    });
 260
 261    vg_convar_push( (struct vg_convar){
 262       .name = "thirdperson",
 263       .data = &thirdperson,
 264       .data_type = k_convar_dtype_i32,
 265       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 266       .persistent = 1
 267    });
 268
 269    vg_convar_push( (struct vg_convar){
 270       .name = "div",
 271       .data = &clock_divider,
 272       .data_type = k_convar_dtype_i32,
 273       .opt_i32 = { .min=0, .max=1, .clamp=0 },
 274       .persistent = 1
 275    });
 276
 277         vg_function_push( (struct vg_cmd){
 278                 .name = "reset",
 279                 .function = reset_player
 280         });
 281
 282    v3f lightDir = { 0.1f, 0.8f, 0.2f };
 283    v3_normalize( lightDir );
 284
 285    character_load( &player.mdl, "ch_default" );
 286    character_init_ragdoll( &player.mdl );
 287
 288    /* Setup scene */
 289    scene_init( &world.geo );
 290    model *mworld = vg_asset_read( "models/mp_dev.mdl" );
 291
 292    scene_add_model( &world.geo, mworld, submodel_get( mworld, "mp_dev" ),
 293          (v3f){0.0f,0.0f,0.0f}, 0.0f, 1.0f );
 294    scene_copy_slice( &world.geo, &world.sm_road );
 295
 296    scene_add_model( &world.geo, mworld, submodel_get( mworld, "terrain" ),
 297          (v3f){0.0f,0.0f,0.0f}, 0.0f, 1.0f );
 298    scene_copy_slice( &world.geo, &world.sm_terrain );
 299
 300    v3_copy( submodel_get( mworld, "tutorial" )->pivot, world.tutorial );
 301
 302    free( mworld );
 303    scene_upload( &world.geo );
 304    bvh_create( &world.geo );
 305
 306    reset_player( 0, NULL );
 307    player_transform_update();
 308
 309    /* Create framebuffers */
 310    glGenFramebuffers( 1, &render.fb_background );
 311    glBindFramebuffer( GL_FRAMEBUFFER, render.fb_background );
 312
 313    glGenTextures( 1, &render.rgb_background );
 314    glBindTexture( GL_TEXTURE_2D, render.rgb_background );
 315    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg_window_x, vg_window_y,
 316          0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
 317
 318    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 319    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 320    glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 321          GL_TEXTURE_2D,
 322          render.rgb_background, 0);
 323
 324    {
 325       float quad[] = { 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
 326                        0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f };
 327
 328       glGenVertexArrays( 1, &render.fsquad.vao );
 329       glGenBuffers( 1, &render.fsquad.vbo );
 330       glGenBuffers( 1, &render.fsquad.ebo );
 331       glBindVertexArray( render.fsquad.vao );
 332       glBindBuffer( GL_ARRAY_BUFFER, render.fsquad.vbo );
 333       glBufferData( GL_ARRAY_BUFFER, sizeof(quad), quad, GL_STATIC_DRAW );
 334       glBindVertexArray( render.fsquad.vao );
 335       glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE,
 336             sizeof(float)*2, (void*)0 );
 337       glEnableVertexAttribArray( 0 );
 338       VG_CHECK_GL();
 339    }
 340 }
 341
 342 static float ktimestep = 1.0f/60.0f;
 343
 344 static void player_freecam(void)
 345 {
 346    m4x3f cam_rot;
 347    m4x3_identity( cam_rot );
 348    m4x3_rotate_y( cam_rot, -player.look_dir[0] );
 349    m4x3_rotate_x( cam_rot, -player.look_dir[1] );
 350
 351    v3f lookdir = { 0.0f, 0.0f, -1.0f },
 352        sidedir = { 1.0f, 0.0f,  0.0f };
 353
 354    m4x3_mulv( cam_rot, lookdir, lookdir );
 355    m4x3_mulv( cam_rot, sidedir, sidedir );
 356
 357    float movespeed = 5.0f;
 358    static v2f mouse_last,
 359               view_vel = { 0.0f, 0.0f };
 360
 361    static v3f move_vel = { 0.0f, 0.0f, 0.0f };
 362
 363    if( vg_get_button_down( "primary" ) )
 364       v2_copy( vg_mouse, mouse_last );
 365    else if( vg_get_button( "primary" ) )
 366    {
 367       v2f delta;
 368       v2_sub( vg_mouse, mouse_last, delta );
 369       v2_copy( vg_mouse, mouse_last );
 370
 371       v2_muladds( view_vel, delta, 0.005f, view_vel );
 372    }
 373
 374    v2_muls( view_vel, 0.75f, view_vel );
 375    v2_add( view_vel, player.look_dir, player.look_dir );
 376    player.look_dir[1] =
 377       vg_clampf( player.look_dir[1], -VG_PIf*0.5f, VG_PIf*0.5f );
 378
 379    if( vg_get_button( "forward" ) )
 380       v3_muladds( move_vel, lookdir, ktimestep * movespeed, move_vel );
 381    if( vg_get_button( "back" ) )
 382       v3_muladds( move_vel, lookdir, ktimestep *-movespeed, move_vel );
 383    if( vg_get_button( "left" ) )
 384       v3_muladds( move_vel, sidedir, ktimestep *-movespeed, move_vel );
 385    if( vg_get_button( "right" ) )
 386       v3_muladds( move_vel, sidedir, ktimestep * movespeed, move_vel );
 387
 388    v3_muls( move_vel, 0.75f, move_vel );
 389    v3_add( move_vel, player.view, player.view );
 390 }
 391
 392 static void apply_gravity( v3f vel, float const timestep )
 393 {
 394    v3f gravity = { 0.0f, -9.6f, 0.0f };
 395    v3_muladds( vel, gravity, timestep, vel );
 396 }
 397
 398 static int ray_hit_is_ramp( ray_hit *hit )
 399 {
 400    return hit->tri[0] < world.sm_road.vertex_count;
 401 }
 402
 403 static void player_start_air(void)
 404 {
 405    player.in_air = 1;
 406
 407    float pstep = ktimestep*10.0f;
 408
 409    float best_velocity_mod = 0.0f,
 410          best_velocity_delta = -9999.9f;
 411
 412    v3f axis, vup;
 413    m3x3_mulv( player.to_world, (v3f){0.0f,1.0f,0.0f}, vup );
 414    v3_cross( vup, player.v, axis );
 415    v3_normalize( axis );
 416    player.land_log_count = 0;
 417
 418    m3x3_identity( player.vr );
 419
 420    for( int m=-3;m<=12; m++ )
 421    {
 422       float vmod = ((float)m / 15.0f)*0.09f;
 423
 424       v3f pco, pco1, pv;
 425       v3_copy( player.co, pco );
 426       v3_copy( player.v, pv );
 427
 428       /*
 429        * Try different 'rotations' of the velocity to find the best possible
 430        * landing normal. This conserves magnitude at the expense of slightly
 431        * unrealistic results
 432        */
 433
 434       m3x3f vr;
 435       v4f vr_q;
 436
 437       q_axis_angle( vr_q, axis, vmod );
 438       q_m3x3( vr_q, vr );
 439
 440       for( int i=0; i<50; i++ )
 441       {
 442          v3_copy( pco, pco1 );
 443          apply_gravity( pv, pstep );
 444
 445          m3x3_mulv( vr, pv, pv );
 446          v3_muladds( pco, pv, pstep, pco );
 447
 448          ray_hit contact;
 449          v3f vdir;
 450
 451          v3_sub( pco, pco1, vdir );
 452          contact.dist = v3_length( vdir );
 453          v3_divs( vdir, contact.dist, vdir);
 454
 455          if( bvh_raycast( &world.geo, pco1, vdir, &contact ))
 456          {
 457             float land_delta = v3_dot( pv, contact.normal );
 458             u32 scolour = (u8)(vg_minf(-land_delta * 2.0f, 255.0f));
 459
 460             /* Bias prediction towords ramps */
 461             if( ray_hit_is_ramp( &contact ) )
 462             {
 463                land_delta *= 0.1f;
 464                scolour |= 0x0000a000;
 465             }
 466
 467             if( (land_delta < 0.0f) && (land_delta > best_velocity_delta) )
 468             {
 469                best_velocity_delta = land_delta;
 470                best_velocity_mod = vmod;
 471
 472                v3_copy( contact.pos, player.land_target );
 473
 474                q_axis_angle( vr_q, axis, vmod*0.1f );
 475                q_m3x3( vr_q, player.vr );
 476             }
 477
 478             v3_copy( contact.pos,
 479                   player.land_target_log[player.land_log_count] );
 480             player.land_target_colours[player.land_log_count] =
 481                0xff000000 | scolour;
 482
 483             player.land_log_count ++;
 484
 485             break;
 486          }
 487       }
 488    }
 489
 490    //v3_rotate( player.v, best_velocity_mod, axis, player.v );
 491
 492    return;
 493    v3_muls( player.v, best_velocity_mod, player.v );
 494 }
 495
 496 static int sample_if_resistant( v3f pos )
 497 {
 498    v3f ground;
 499    v3_copy( pos, ground );
 500
 501    ray_hit hit;
 502    if( bvh_scene_sample( &world.geo, ground, &hit ) )
 503    {
 504       v3f angle;
 505       v3_copy( player.v, angle );
 506       v3_normalize( angle );
 507       float resistance = v3_dot( hit.normal, angle );
 508
 509       if( resistance < 0.25f )
 510       {
 511          v3_copy( ground, pos );
 512          return 1;
 513       }
 514    }
 515
 516    return 0;
 517 }
 518
 519 static float stable_force( float current, float diff )
 520 {
 521    float new = current + diff;
 522
 523    if( new * current < 0.0f )
 524       return 0.0f;
 525
 526    return new;
 527 }
 528
 529 static void player_physics_ground(void)
 530 {
 531    /*
 532     * Getting surface collision points,
 533     * the contact manifold is a triangle for simplicity.
 534     */
 535    v3f contact_front, contact_back, contact_norm, vup, vside,
 536        axis;
 537
 538    float klength = 0.65f;
 539    m4x3_mulv( player.to_world, (v3f){ 0.15f,0.0f,-klength}, contact_norm );
 540    m4x3_mulv( player.to_world, (v3f){-0.15f,0.0f,-klength}, contact_front );
 541    m4x3_mulv( player.to_world, (v3f){ 0.00f,0.0f, klength}, contact_back );
 542    m3x3_mulv( player.to_world, (v3f){ 0.0f, 1.0f, 0.0f}, vup );
 543    m3x3_mulv( player.to_world, (v3f){ 1.0f, 0.0f, 0.0f}, vside );
 544
 545    v3f cn0, cn1, cn2;
 546
 547    int contact_count =
 548       sample_if_resistant( contact_front ) +
 549       sample_if_resistant( contact_back ) +
 550       sample_if_resistant( contact_norm );
 551
 552    if( contact_count < 3 )
 553    {
 554       player_start_air();
 555       return;
 556    }
 557
 558    v3f norm;
 559    v3f v0, v1;
 560    v3_sub( contact_norm, contact_front, v0 );
 561    v3_sub( contact_back, contact_front, v1 );
 562    v3_cross( v1, v0, norm );
 563    v3_normalize( norm );
 564
 565    vg_line( contact_norm, contact_front, 0xff00ff00 );
 566    vg_line( contact_back, contact_front, 0xff0000ff );
 567
 568    /* Surface alignment */
 569    float angle = v3_dot( vup, norm );
 570    v3_cross( vup, norm, axis );
 571
 572    if( angle < 0.999f )
 573    {
 574       v4f correction;
 575       q_axis_angle( correction, axis, acosf(angle) );
 576       q_mul( correction, player.rot, player.rot );
 577    }
 578
 579    float resistance = v3_dot( norm, player.v );
 580    if( resistance >= 0.0f )
 581    {
 582       player_start_air();
 583       return;
 584    }
 585    else
 586    {
 587       v3_muladds( player.v, norm, -resistance, player.v );
 588    }
 589
 590    /* This is where velocity integration used to be */
 591
 592    float slip = 0.0f;
 593
 594    player.co[1] = (contact_front[1]+contact_back[1])*0.5f;
 595
 596    v3f vel;
 597    m3x3_mulv( player.to_local, player.v, vel );
 598
 599    /* Calculate local forces */
 600
 601    slip = fabsf(-vel[0] / vel[2]) * vg_signf(vel[0]);
 602    if( fabsf( slip ) > 1.2f )
 603       slip = vg_signf( slip ) * 1.2f;
 604    player.slip = slip;
 605    player.reverse = -vg_signf(vel[2]);
 606
 607    float substep = ktimestep * 0.2f;
 608    float fwd_resistance = (vg_get_button( "break" )? 5.0f: 0.02f) * -substep;
 609
 610    for( int i=0; i<5; i++ )
 611    {
 612       vel[2] = stable_force( vel[2], vg_signf( vel[2] ) * fwd_resistance );
 613       vel[0] = stable_force( vel[0], vg_signf( vel[0] ) * -7.0f *substep );
 614    }
 615
 616    static double start_push = 0.0;
 617    if( vg_get_button_down( "push" ) )
 618       start_push = vg_time;
 619
 620    if( !vg_get_button("break") && vg_get_button( "push" ) )
 621    {
 622       float const k_maxpush = 16.0f,
 623                   k_pushaccel = 5.0f;
 624
 625       float cycle_time = vg_time-start_push,
 626             amt = k_pushaccel * (sinf( cycle_time * 8.0f )*0.5f+0.5f)*ktimestep,
 627             current = v3_length( vel ),
 628             new_vel = vg_minf( current + amt, k_maxpush );
 629       new_vel -= vg_minf(current, k_maxpush);
 630       vel[2] -= new_vel * player.reverse;
 631    }
 632
 633    m3x3_mulv( player.to_world, vel, player.v );
 634
 635    if( vg_get_button( "yawl" ) )
 636       player.iY +=  3.6f * ktimestep;
 637    if( vg_get_button( "yawr" ) )
 638       player.iY -=  3.6f * ktimestep;
 639
 640    float steer = vg_get_axis( "horizontal" );
 641    player.iY -= vg_signf(steer)*powf(steer,2.0f) * 1.5f * ktimestep;
 642
 643    /* Too much lean and it starts to look like a snowboard here */
 644    v2_lerp( player.board_xy, (v2f){ slip*0.25f, 0.0f },
 645          ktimestep*5.0f, player.board_xy);
 646 }
 647
 648 static void draw_cross(v3f pos,u32 colour)
 649 {
 650    v3f p0, p1;
 651    v3_add( (v3f){ 1.0f,0.0f,0.0f}, pos, p0 );
 652    v3_add( (v3f){-1.0f,0.0f,0.0f}, pos, p1 );
 653    vg_line( p0, p1, colour );
 654    v3_add( (v3f){0.0f, 1.0f,0.0f}, pos, p0 );
 655    v3_add( (v3f){0.0f,-1.0f,0.0f}, pos, p1 );
 656    vg_line( p0, p1, colour );
 657    v3_add( (v3f){0.0f,0.0f, 1.0f}, pos, p0 );
 658    v3_add( (v3f){0.0f,0.0f,-1.0f}, pos, p1 );
 659    vg_line( p0, p1, colour );
 660 }
 661
 662 static void player_physics_air(void)
 663 {
 664    /* Debug prediciton */
 665
 666    m3x3_mulv( player.vr, player.v, player.v );
 667    for( int i=0; i<player.land_log_count; i++ )
 668       draw_cross( player.land_target_log[i],
 669             player.land_target_colours[i] );
 670
 671    draw_cross( player.land_target, 0xff0000ff );
 672
 673    v3f ground_pos;
 674    v3_copy( player.co, ground_pos );
 675
 676    ray_hit hit;
 677    if( bvh_scene_sample( &world.geo, ground_pos, &hit ) )
 678    {
 679       if( ground_pos[1] > player.co[1] )
 680       {
 681          player.in_air = 0;
 682
 683          if( !ray_hit_is_ramp( &hit ) )
 684          {
 685             player.is_dead = 1;
 686             m4x3_mulv( player.to_world, player.view, player.follow );
 687             character_ragdoll_copypose( &player.mdl, player.v );
 688          }
 689
 690          return;
 691       }
 692    }
 693
 694    /* Prediction
 695     *
 696     * TODO: Find best landing surface and guide player towords it
 697     */
 698    float pstep = ktimestep*10.0f;
 699
 700    v3f pco, pco1, pv;
 701    v3_copy( player.co, pco );
 702    v3_copy( player.v, pv );
 703
 704    float time_to_impact = 0.0f;
 705    float limiter = 1.0f;
 706
 707    for( int i=0; i<50; i++ )
 708    {
 709       v3_copy( pco, pco1 );
 710       apply_gravity( pv, pstep );
 711       v3_muladds( pco, pv, pstep, pco );
 712
 713       //vg_line( pco, pco1, i&0x1?0xff000000:0xffffffff );
 714
 715       ray_hit contact;
 716       v3f vdir;
 717
 718       v3_sub( pco, pco1, vdir );
 719       contact.dist = v3_length( vdir );
 720       v3_divs( vdir, contact.dist, vdir);
 721
 722       float orig_dist = contact.dist;
 723       if( bvh_raycast( &world.geo, pco1, vdir, &contact ))
 724       {
 725          v3f localup;
 726          m3x3_mulv( player.to_world, (v3f){0.0f,1.0f,0.0f}, localup );
 727
 728          float angle = v3_dot( localup, contact.normal );
 729          v3f axis;
 730          v3_cross( localup, contact.normal, axis );
 731
 732          time_to_impact += (contact.dist/orig_dist)*pstep;
 733          limiter = vg_minf( 5.0f, time_to_impact )/5.0f;
 734          limiter = 1.0f-limiter;
 735          limiter *= limiter;
 736          limiter = 1.0f-limiter;
 737
 738          if( angle < 0.99f )
 739          {
 740             v4f correction;
 741             q_axis_angle( correction, axis, acosf(angle)*0.05f*(1.0f-limiter) );
 742             q_mul( correction, player.rot, player.rot );
 743          }
 744
 745          draw_cross( contact.pos, 0xffff0000 );
 746          break;
 747       }
 748       time_to_impact += pstep;
 749    }
 750
 751
 752    player.iY -= vg_get_axis( "horizontal" ) * 3.6f * ktimestep;
 753    {
 754
 755       float iX = vg_get_axis( "vertical" ) * 3.6f * limiter * ktimestep;
 756       static float siX = 0.0f;
 757       siX = vg_lerpf( siX, iX, 0.3f );
 758
 759       v4f rotate;
 760       v3f vside;
 761
 762       m3x3_mulv( player.to_world, (v3f){1.0f,0.0f,0.0f}, vside );
 763
 764       q_axis_angle( rotate, vside, siX );
 765       q_mul( rotate, player.rot, player.rot );
 766    }
 767
 768    v2f target = {0.0f,0.0f};
 769    v2_muladds( target, (v2f){ vg_get_axis("h1"), vg_get_axis("v1") },
 770                player.grab, target );
 771    v2_lerp( player.board_xy, target, ktimestep*3.0f, player.board_xy );
 772 }
 773
 774 static void player_animate(void);
 775 static void player_update(void)
 776 {
 777
 778    if( vg_get_axis("grabl")>0.0f)
 779       reset_player(0,NULL);
 780    if( player.is_dead )
 781       return;
 782
 783    static int clock = 0;
 784
 785    /* temp */
 786    if( freecam )
 787    {
 788       player_freecam();
 789       return;
 790    }
 791
 792    clock ++;
 793    if( clock >= clock_divider )
 794       clock = 0;
 795    else
 796       return;
 797    float horizontal = vg_get_axis("horizontal"),
 798          vertical = vg_get_axis("vertical");
 799
 800    player.joy_l[0] = vg_signf(horizontal) * powf( horizontal, 2.0f );
 801    player.joy_l[1] = vg_signf(vertical) * powf( vertical, 2.0f );
 802
 803    /* Integrate velocity */
 804    if( sv_phys )
 805    {
 806       apply_gravity( player.v, ktimestep );
 807       v3_muladds( player.co, player.v, ktimestep, player.co );
 808    }
 809
 810    /* Integrate inertia */
 811    v4f rotate; v3f vup = {0.0f,1.0f,0.0f};
 812    m3x3_mulv( player.to_world, vup, vup );
 813
 814    static float siY = 0.0f;
 815
 816    float lerpq = player.in_air? 0.04f: 0.3f;
 817    siY = vg_lerpf( siY, player.iY, lerpq );
 818
 819    q_axis_angle( rotate, vup, siY );
 820    q_mul( rotate, player.rot, player.rot );
 821
 822    player.look_dir[0] = atan2f( player.v[0], -player.v[2] );
 823    player.look_dir[1] = atan2f( -player.v[1], sqrtf(player.v[0]*player.v[0]+
 824                                        player.v[2]*player.v[2]) ) * 0.3f;
 825
 826    player.iY = 0.0f; /* temp */
 827
 828    if( player.in_air )
 829       player_physics_air();
 830
 831    if( !player.in_air )
 832       player_physics_ground();
 833
 834    /* Camera and character */
 835
 836    player_transform_update();
 837    q_normalize(player.rot);
 838    player_animate();
 839 }
 840
 841 void vg_update(void)
 842 {
 843    player_update();
 844
 845    //rb_torque( &mr_box, (v3f){0.0f,0.0f,1.0f}, 0.01f );
 846
 847    if( glfwGetKey( vg_window, GLFW_KEY_F ) )
 848       character_ragdoll_go( &player.mdl, player.view );
 849
 850    if( glfwGetKey( vg_window, GLFW_KEY_G ) )
 851    {
 852       player.is_dead = 1;
 853       m4x3_mulv( player.to_world, player.view, player.follow );
 854       character_ragdoll_copypose( &player.mdl, player.v );
 855    }
 856
 857    static int clock = 0;
 858
 859    clock ++;
 860    if( clock >= clock_divider )
 861    {
 862       character_debug_ragdoll( &player.mdl );
 863
 864       if( player.is_dead )
 865          character_ragdoll_iter( &player.mdl, &world.geo );
 866
 867       rb_build_manifold( &mr_box, &world.geo );
 868       rb_build_manifold( &mrs_box, &world.geo );
 869       rb_constraint_manifold( &mr_box );
 870       rb_constraint_manifold( &mrs_box );
 871
 872       rb_iter( &mr_box );
 873       rb_iter( &mrs_box );
 874
 875       rb_debug( &mr_box, 0xffffffff );
 876       rb_debug( &mrs_box, 0xff00ff00 );
 877
 878       rb_update_transform( &mr_box );
 879       rb_update_transform( &mrs_box );
 880
 881       clock = 0;
 882    }
 883
 884 }
 885
 886 static void player_animate(void)
 887 {
 888    /* Camera position */
 889    static v3f last_vel = { 0.0f, 0.0f, 0.0f };
 890    static v3f momentum, bob;
 891
 892    v3_sub( player.v, last_vel, player.a );
 893    v3_copy( player.v, last_vel );
 894
 895    v3_add( momentum, player.a, momentum );
 896    v3_lerp( momentum, (v3f){0.0f,0.0f,0.0f}, 0.1f, momentum );
 897    v3f target;
 898
 899    momentum[0] = vg_clampf( momentum[0], -2.0f, 2.0f );
 900    momentum[1] = vg_clampf( momentum[1], -0.2f, 5.0f );
 901    momentum[2] = vg_clampf( momentum[2], -2.0f, 2.0f );
 902    v3_copy( momentum, target );
 903    v3_lerp( bob, target, 0.2f, bob );
 904
 905    /* Head */
 906    float lslip = fabsf(player.slip); //vg_minf( 0.4f, slip );
 907
 908    float grabt = vg_get_axis( "grabr" )*0.5f+0.5f;
 909    player.grab = vg_lerpf( player.grab, grabt, 0.04f );
 910
 911    float kheight = 2.0f,
 912          kleg = 0.6f;
 913
 914    v3f head;
 915    head[0] = 0.0f;
 916    head[1] = (0.3f+cosf(lslip)*0.5f*(1.0f-player.grab*0.7f)) * kheight;
 917    head[2] = 0.0f;
 918
 919    v3f offset;
 920    m3x3_mulv( player.to_local, bob, offset );
 921
 922    offset[0] *= 0.3333f;
 923    offset[1] *= -0.25f;
 924    offset[2] *= 0.7f;
 925    v3_muladds( head, offset, 0.7f, head );
 926    head[1] = vg_clampf( head[1], 0.3f, kheight );
 927
 928 #if 0
 929    if( !freecam )
 930    {
 931       v3_copy( head, player.view );
 932       v3f camoffs = {-0.2f,-0.6f,0.00f};
 933       v3_add( player.view, camoffs, player.view );
 934    }
 935 #endif
 936
 937
 938    /*
 939     * Animation blending
 940     * ===========================================
 941     */
 942
 943    static float fslide = 0.0f;
 944    static float fdirz = 0.0f;
 945    static float fdirx = 0.0f;
 946    static float fstand = 0.0f;
 947    static float ffly = 0.0f;
 948
 949    float speed = v3_length( player.v );
 950
 951    fstand = vg_lerpf(fstand, 1.0f-vg_clampf(speed*0.03f,0.0f,1.0f),0.1f);
 952    fslide = vg_lerpf(fslide, vg_clampf(lslip+fabsf(offset[0])*0.2f,
 953             0.0f,1.0f), 0.04f);
 954    fdirz = vg_lerpf(fdirz, player.reverse > 0.0f? 1.0f: 0.0f, 0.04f );
 955    fdirx = vg_lerpf(fdirx, player.slip < 0.0f?    1.0f: 0.0f, 0.04f );
 956    ffly = vg_lerpf(ffly, player.in_air?           1.0f: 0.0f, 0.04f );
 957
 958    character_pose_reset( &player.mdl );
 959
 960    float amt_air = ffly*ffly,
 961          amt_ground = 1.0f-amt_air,
 962          amt_std = (1.0f-fslide) * amt_ground,
 963          amt_stand = amt_std * fstand,
 964          amt_aero = amt_std * (1.0f-fstand),
 965          amt_slide = amt_ground * fslide;
 966
 967    character_final_pose( &player.mdl, offset, &pose_stand, amt_stand );
 968    character_final_pose( &player.mdl, offset, &pose_aero, amt_aero*fdirz );
 969    character_final_pose( &player.mdl, offset,
 970          &pose_aero_reverse, amt_aero * (1.0f-fdirz) );
 971    character_final_pose( &player.mdl, offset, &pose_slide, amt_slide*fdirx );
 972    character_final_pose( &player.mdl, offset,
 973          &pose_slide1, amt_slide*(1.0f-fdirx) );
 974
 975    character_final_pose( &player.mdl, (v3f){0.0f,0.0f,0.0f},
 976          &pose_fly, amt_air );
 977
 978    if( !freecam )
 979    {
 980       v3_copy( player.mdl.cam_pos, player.view );
 981       v3_muladds( player.view, offset, 0.7f, player.view );
 982       player.view[1] = vg_clampf( player.view[1], 0.3f, kheight );
 983    }
 984
 985    /*
 986     * Additive effects
 987     * ==========================
 988     */
 989    struct ik_basic *arm_l = &player.mdl.ik_arm_l,
 990                    *arm_r = &player.mdl.ik_arm_r;
 991
 992    v3f localv;
 993    m3x3_mulv( player.to_local, player.v, localv );
 994    v3_muladds( arm_l->end, localv, -0.01f, arm_l->end );
 995    v3_muladds( arm_r->end, localv, -0.01f, arm_r->end );
 996
 997    /* New board transformation */
 998    v4f board_rotation; v3f board_location;
 999
1000    v4f rz, rx;
1001    q_axis_angle( rz, (v3f){ 0.0f, 0.0f, 1.0f }, player.board_xy[0] );
1002    q_axis_angle( rx, (v3f){ 1.0f, 0.0f, 0.0f }, player.board_xy[1] );
1003    q_mul( rx, rz, board_rotation );
1004
1005    v3f *mboard = player.mdl.matrices[k_chpart_board];// player.mboard;
1006    q_m3x3( board_rotation, mboard );
1007    m3x3_mulv( mboard, (v3f){ 0.0f, -0.5f, 0.0f }, board_location );
1008    v3_add( (v3f){0.0f,0.5f,0.0f}, board_location, board_location );
1009    v3_copy( board_location, mboard[3] );
1010
1011
1012    float wheel_r = offset[0]*-0.4f;
1013    v4f qwheel;
1014    q_axis_angle( qwheel, (v3f){0.0f,1.0f,0.0f}, wheel_r );
1015
1016    q_m3x3( qwheel, player.mdl.matrices[k_chpart_wb] );
1017
1018    m3x3_transpose( player.mdl.matrices[k_chpart_wb],
1019                    player.mdl.matrices[k_chpart_wf] );
1020    v3_copy( player.mdl.offsets[k_chpart_wb],
1021          player.mdl.matrices[k_chpart_wb][3] );
1022    v3_copy( player.mdl.offsets[k_chpart_wf],
1023          player.mdl.matrices[k_chpart_wf][3] );
1024
1025    m4x3_mul( mboard, player.mdl.matrices[k_chpart_wb],
1026                      player.mdl.matrices[k_chpart_wb] );
1027    m4x3_mul( mboard, player.mdl.matrices[k_chpart_wf],
1028                      player.mdl.matrices[k_chpart_wf] );
1029
1030    m4x3_mulv( mboard, player.mdl.ik_leg_l.end, player.mdl.ik_leg_l.end );
1031    m4x3_mulv( mboard, player.mdl.ik_leg_r.end, player.mdl.ik_leg_r.end );
1032
1033
1034    v3_copy( player.mdl.ik_arm_l.end, player.handl_target );
1035    v3_copy( player.mdl.ik_arm_r.end, player.handr_target );
1036
1037    if( 1||player.in_air )
1038    {
1039       float tuck = player.board_xy[1],
1040             tuck_amt = fabsf( tuck ) * (1.0f-fabsf(player.board_xy[0]));
1041
1042       float crouch = player.grab*0.3f;
1043       v3_muladds( player.mdl.ik_body.base, (v3f){0.0f,-1.0f,0.0f},
1044             crouch, player.mdl.ik_body.base );
1045       v3_muladds( player.mdl.ik_body.end, (v3f){0.0f,-1.0f,0.0f},
1046             crouch*1.2f, player.mdl.ik_body.end );
1047
1048       if( tuck < 0.0f )
1049       {
1050          //foot_l *= 1.0f-tuck_amt*1.5f;
1051
1052          if( player.grab > 0.1f )
1053          {
1054             m4x3_mulv( mboard, (v3f){0.1f,0.14f,0.6f},
1055                   player.handl_target );
1056          }
1057       }
1058       else
1059       {
1060          //foot_r *= 1.0f-tuck_amt*1.4f;
1061
1062          if( player.grab > 0.1f )
1063          {
1064             m4x3_mulv( mboard, (v3f){0.1f,0.14f,-0.6f},
1065                   player.handr_target );
1066          }
1067       }
1068    }
1069
1070    v3_lerp( player.handl, player.handl_target, 0.1f, player.handl );
1071    v3_lerp( player.handr, player.handr_target, 0.1f, player.handr );
1072
1073    v3_copy( player.handl, player.mdl.ik_arm_l.end );
1074    v3_copy( player.handr, player.mdl.ik_arm_r.end );
1075
1076    /* Head rotation */
1077
1078    static float rhead = 0.0f;
1079    rhead = vg_lerpf( rhead,
1080          vg_clampf(atan2f( localv[2], -localv[0] ),-1.0f,1.0f), 0.04f );
1081    player.mdl.rhead = rhead;
1082 }
1083
1084 static void draw_player(void)
1085 {
1086    /* Draw */
1087    vg_tex2d_bind( &tex_pallet, 0 );
1088
1089    m4x3_copy( player.to_world, player.mdl.mroot );
1090
1091    if( player.is_dead )
1092       character_mimic_ragdoll( &player.mdl );
1093    else
1094       character_eval( &player.mdl );
1095
1096    character_draw( &player.mdl, (player.is_dead|player.in_air)? 0.0f: 1.0f );
1097 }
1098
1099 static void vg_framebuffer_resize( int w, int h )
1100 {
1101    glBindTexture( GL_TEXTURE_2D, render.rgb_background );
1102    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, w, h, 0,
1103          GL_RGB, GL_UNSIGNED_BYTE, NULL );
1104 }
1105
1106 void vg_render(void)
1107 {
1108    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
1109    glViewport( 0,0, vg_window_x, vg_window_y );
1110
1111    glDisable( GL_DEPTH_TEST );
1112    glClearColor( 0.1f, 0.0f, 0.2f, 1.0f );
1113    glClearColor(111.0f/255.0f, 46.0f/255.0f, 45.0f/255.0f,1.0f);
1114
1115    glClearColor( powf(0.066f,1.0f/2.2f),
1116                  powf(0.050f,1.0f/2.2f),
1117                  powf(0.046f,1.0f/2.2f), 1.0f );
1118    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
1119
1120    v3f pos_inv;
1121    static v3f cam_lerped = {0.0f,0.0f,0.0f};
1122    v3_lerp( cam_lerped, player.view, 0.08f, cam_lerped );
1123
1124    if( !freecam  )
1125    {
1126       m4x3_mulv( player.to_world, cam_lerped, pos_inv );
1127
1128       static float air_blend = 0.0f;
1129
1130       air_blend = vg_lerpf( air_blend, player.in_air, 0.04f );
1131       v3_muladds( pos_inv, player.v, -0.05f*air_blend, pos_inv );
1132    }
1133    else
1134       v3_add( player.co, player.view, pos_inv );
1135    v3_negate( pos_inv, pos_inv );
1136
1137    static float vertical_lerp = 0.0f;
1138    vertical_lerp = vg_lerpf( vertical_lerp, pos_inv[1], 1.0f );
1139    v3f final = { pos_inv[0], vertical_lerp, pos_inv[2] };
1140
1141    float speed = freecam? 0.0f: v3_length( player.v );
1142    v3f shake = { vg_randf()-0.5f, vg_randf()-0.5f, vg_randf()-0.5f };
1143    v3_muls( shake, speed*0.01f, shake );
1144
1145    static v2f cam_lerped_dir;
1146
1147    m4x3_identity( world_matrix );
1148    if( player.is_dead )
1149    {
1150       v3f delta;
1151       v3_sub( player.mdl.ragdoll[k_chpart_head].co, player.follow, delta );
1152       v3_normalize(delta);
1153
1154       v3f follow_pos;
1155       v3_muladds( player.mdl.ragdoll[k_chpart_head].co, delta,
1156             -1.5f, follow_pos );
1157       v3_lerp( player.follow, follow_pos, 0.1f, player.follow );
1158       v3_negate( player.follow, final );
1159
1160
1161       float yaw = atan2f( delta[0], -delta[2] );
1162       float pitch = asinf( delta[1] );
1163       m4x3_rotate_x( world_matrix, -pitch );
1164       m4x3_rotate_y( world_matrix, yaw );
1165    }
1166    else
1167    {
1168       v2_lerp( cam_lerped_dir, player.look_dir, 0.04f, cam_lerped_dir );
1169
1170       m4x3_rotate_x( world_matrix,
1171             freecam?
1172             cam_lerped_dir[1]:
1173             0.6f+shake[1]*0.04f+player.look_dir[1] );
1174
1175       m4x3_rotate_y( world_matrix,
1176             freecam?
1177             cam_lerped_dir[0]:
1178             player.look_dir[0]+shake[0]*0.02f );
1179    }
1180
1181
1182    m4x3_translate( world_matrix, final );
1183
1184    m4x4f world_4x4;
1185    m4x3_expand( world_matrix, world_4x4 );
1186    m4x4_projection( vg_pv,
1187          freecam? 60.0f: 120.0f,
1188          (float)vg_window_x / (float)vg_window_y,
1189          0.01f, 1000.0f );
1190    m4x4_mul( vg_pv, world_4x4, vg_pv );
1191
1192    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 1.0f, 0.0f, 0.0f }, 0xffff0000 );
1193    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 0.0f, 1.0f, 0.0f }, 0xff00ff00 );
1194    vg_line( (v3f){ 0.0f, 0.0f, 0.0f }, (v3f){ 0.0f, 0.0f, 1.0f }, 0xff0000ff );
1195
1196    glEnable( GL_DEPTH_TEST );
1197
1198    /*
1199     * Draw world
1200     */
1201    SHADER_USE(shader_standard_lit);
1202
1203    m4x3f identity_matrix;
1204    m4x3_identity( identity_matrix );
1205
1206         glUniformMatrix4fv( SHADER_UNIFORM( shader_standard_lit, "uPv" ),
1207          1, GL_FALSE, (float *)vg_pv );
1208         glUniformMatrix4x3fv( SHADER_UNIFORM( shader_standard_lit, "uMdl" ),
1209          1, GL_FALSE, (float *)identity_matrix );
1210
1211    vg_tex2d_bind( &tex_grid, 0 );
1212    glUniform1i( SHADER_UNIFORM( shader_standard_lit, "uTexMain" ), 0 );
1213
1214    glUniform4f( SHADER_UNIFORM(shader_standard_lit,"uColour"),
1215          0.4f,0.4f,0.4f,1.0f );
1216
1217    scene_bind( &world.geo );
1218    scene_draw( &world.geo );
1219
1220 #if 0
1221    if( !replay_record )
1222    {
1223       m4x3f *base = &replay_buffer[(PART_COUNT)*replay_buffer_frame];
1224
1225       for( int i=0; i<PART_COUNT; i++ )
1226          m4x3_copy( base[i], player.mdl.matrices[i] );
1227
1228       replay_buffer_frame ++;
1229
1230       if( replay_buffer_frame == REPLAY_LENGTH )
1231          replay_buffer_frame = 0;
1232
1233       vg_tex2d_bind( &tex_pallet, 0 );
1234       character_draw( &player.mdl, 0.0f );
1235       player_animate();
1236    }
1237 #endif
1238
1239
1240
1241    /* Copy the RGB of what we have into the background buffer */
1242    glBindFramebuffer( GL_READ_FRAMEBUFFER, 0 );
1243    glBindFramebuffer( GL_DRAW_FRAMEBUFFER, render.fb_background );
1244    glBlitFramebuffer( 0,0, vg_window_x, vg_window_y,
1245                       0,0, vg_window_x, vg_window_y,
1246                       GL_COLOR_BUFFER_BIT,
1247                       GL_LINEAR );
1248
1249    /* Clear out the colour buffer, but keep depth */
1250    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
1251    glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
1252
1253    if( !player.is_dead )
1254       glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
1255    else
1256       glClear( GL_COLOR_BUFFER_BIT );
1257
1258    draw_player();
1259
1260    /* Draw back in the background */
1261    glEnable(GL_BLEND);
1262    glDisable(GL_DEPTH_TEST);
1263    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
1264    glBlendEquation(GL_FUNC_ADD);
1265
1266    SHADER_USE( shader_blit );
1267
1268    glUniform1i( SHADER_UNIFORM(shader_blit,"uTexMain"), 0 );
1269    glActiveTexture(GL_TEXTURE0);
1270    glBindTexture( GL_TEXTURE_2D, render.rgb_background );
1271
1272    glBindVertexArray( render.fsquad.vao );
1273    glDrawArrays( GL_TRIANGLES, 0, 6 );
1274
1275    glDisable(GL_BLEND);
1276
1277    /* Other shite */
1278    glDisable( GL_DEPTH_TEST );
1279    vg_lines_drawall( (float *)vg_pv );
1280
1281    /* Debugger camera */
1282    glViewport( 0,0, 800, 800 );
1283    glClearColor( 0.1f, 0.0f, 0.2f, 1.0f );
1284    glClear( GL_DEPTH_BUFFER_BIT );
1285
1286    m4x3_identity( world_matrix );
1287
1288    v3f debugcam;
1289    v3_negate( player.co, debugcam );
1290    debugcam[2] -= 2.0f;
1291    debugcam[1] -= 0.7f;
1292
1293    m4x3_translate( world_matrix, debugcam );
1294    m4x3_expand( world_matrix, world_4x4 );
1295
1296    m4x4_projection( vg_pv,
1297          100.0f,
1298          (float)128.0f / (float)128.0f,
1299          0.01f, 1000.0f );
1300    m4x4_mul( vg_pv, world_4x4, vg_pv );
1301
1302    if(sv_debugcam)
1303    {
1304       glEnable( GL_DEPTH_TEST );
1305       draw_player();
1306    }
1307
1308    glDisable( GL_DEPTH_TEST );
1309    vg_lines_drawall( (float *)vg_pv );
1310
1311    glViewport( 0,0, vg_window_x, vg_window_y );
1312
1313 #if 0
1314    if( replay_record )
1315    {
1316       m4x3f *base = &replay_buffer[(PART_COUNT)*replay_buffer_frame];
1317
1318       for( int i=0; i<PART_COUNT; i++ )
1319          m4x3_copy( player.mdl.matrices[i], base[i] );
1320
1321       replay_buffer_frame ++;
1322
1323       if( replay_buffer_frame == REPLAY_LENGTH )
1324          replay_buffer_frame = 0;
1325    }
1326 #endif
1327 }
1328
1329 void vg_ui(void)
1330 {
1331    char buf[20];
1332
1333    snprintf( buf, 20, "%.2fm/s", v3_length( player.v ) );
1334    gui_text( (ui_px [2]){ 0, 0 }, buf, 1, k_text_align_left );
1335
1336    snprintf( buf, 20, "%.2f %.2f %.2f m/s",
1337          player.a[0], player.a[1], player.a[2] );
1338    gui_text( (ui_px [2]){ 0, 20 }, buf, 1, k_text_align_left );
1339
1340    snprintf( buf, 20, "pos %.2f %.2f %.2f",
1341          player.co[0], player.co[1], player.co[2] );
1342    gui_text( (ui_px [2]){ 0, 40 }, buf, 1, k_text_align_left );
1343
1344    if( vg_gamepad_ready )
1345    {
1346       for( int i=0; i<6; i++ )
1347       {
1348          snprintf( buf, 20, "%.2f", vg_gamepad.axes[i] );
1349          gui_text( (ui_px [2]){ 0, (i+3)*20 }, buf, 1, k_text_align_left );
1350       }
1351    }
1352    else
1353    {
1354       gui_text( (ui_px [2]){ 0, 60 },
1355             "Gamepad not ready", 1, k_text_align_left );
1356    }
1357 }
1358
1359 void vg_free(void){}