player_animation.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #ifndef PLAYER_ANIMATION_H
   6 #define PLAYER_ANIMATION_H
   7
   8 #include "player.h"
   9
  10 static void player_animate_offboard(void)
  11 {
  12    {
  13       float fly = player.phys.in_air,
  14             rate;
  15
  16       if( player.phys.in_air )
  17          rate = 2.4f;
  18       else
  19          rate = 9.0f;
  20
  21       player.ffly  = vg_lerpf( player.ffly, fly, rate*vg.time_delta );
  22    }
  23
  24    struct player_phys *phys = &player.phys;
  25
  26    mdl_keyframe apose[32], bpose[32];
  27    struct skeleton *sk = &player.mdl.sk;
  28
  29    float walk_norm = (float)player.mdl.anim_walk->length/30.0f,
  30          run_norm  = (float)player.mdl.anim_run->length/30.0f,
  31          t = player.walk_timer,
  32          l = vg_get_axis("grabl") * 0.5f + 0.5f;
  33
  34    /* walk/run */
  35    skeleton_sample_anim( sk, player.mdl.anim_walk, t*walk_norm, apose );
  36    skeleton_sample_anim( sk, player.mdl.anim_run,  t*run_norm, bpose );
  37
  38    skeleton_lerp_pose( sk, apose, bpose, l, apose );
  39
  40    /* idle */
  41    float idle_walk = vg_minf(l * 10.0f, 1.0f);
  42
  43    skeleton_sample_anim( sk, player.mdl.anim_idle, vg.time*0.1f, bpose );
  44    skeleton_lerp_pose( sk, apose, bpose, 1.0f-idle_walk, apose );
  45
  46    /* air */
  47    skeleton_sample_anim( sk, player.mdl.anim_jump, vg.time*0.6f, bpose );
  48    skeleton_lerp_pose( sk, apose, bpose, player.ffly, apose );
  49
  50    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_defer_ik );
  51    skeleton_apply_ik_pass( &player.mdl.sk );
  52    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_deffered_only );
  53
  54    v3_copy( player.mdl.sk.final_mtx[player.mdl.id_head-1][3],
  55                player.mdl.cam_pos );
  56
  57    skeleton_apply_inverses( &player.mdl.sk );
  58
  59    m4x3f mtx;
  60    v4f rot;
  61    q_axis_angle( rot, (v3f){0.0f,1.0f,0.0f}, -player.angles[0] - VG_PIf*0.5f );
  62    q_m3x3( rot, mtx );
  63    v3_copy( phys->rb.to_world[3], mtx[3] );
  64
  65    skeleton_apply_transform( &player.mdl.sk, mtx );
  66    skeleton_debug( &player.mdl.sk );
  67 }
  68
  69 static void player_animate(void)
  70 {
  71    struct player_phys *phys = &player.phys;
  72
  73    if( !phys->on_board )
  74    {
  75       player_animate_offboard();
  76       return;
  77    }
  78
  79    /* Camera position */
  80    v3_sub( phys->rb.v, phys->v_last, phys->a );
  81    v3_copy( phys->rb.v, phys->v_last );
  82
  83    v3_add( phys->m, phys->a, phys->m );
  84    v3_lerp( phys->m, (v3f){0.0f,0.0f,0.0f}, 0.1f, phys->m );
  85
  86    phys->m[0] = vg_clampf( phys->m[0], -2.0f, 2.0f );
  87    phys->m[1] = vg_clampf( phys->m[1], -2.0f, 2.0f );
  88    phys->m[2] = vg_clampf( phys->m[2], -2.0f, 2.0f );
  89    v3_lerp( phys->bob, phys->m, 0.2f, phys->bob );
  90
  91    /* Head */
  92    float lslip = fabsf(phys->slip);
  93
  94    float kheight = 2.0f,
  95          kleg = 0.6f;
  96
  97    v3f offset;
  98    v3_zero( offset );
  99    m3x3_mulv( phys->rb.to_local, phys->bob, offset );
 100
 101    static float speed_wobble = 0.0f, speed_wobble_2 = 0.0f;
 102
 103    float kickspeed = vg_clampf(v3_length(phys->rb.v)*(1.0f/40.0f), 0.0f, 1.0f);
 104    float kicks = (vg_randf()-0.5f)*2.0f*kickspeed;
 105    float sign = vg_signf( kicks );
 106    speed_wobble = vg_lerpf( speed_wobble, kicks*kicks*sign, 6.0f*vg.time_delta);
 107    speed_wobble_2 = vg_lerpf( speed_wobble_2, speed_wobble, 2.4f*vg.time_delta);
 108
 109    offset[0] *= 0.26f;
 110    offset[0] += speed_wobble_2*3.0f;
 111
 112    offset[1] *= -0.3f;
 113    offset[2] *= 0.01f;
 114
 115    offset[0] = vg_clampf( offset[0], -0.8f, 0.8f );
 116    offset[1] = vg_clampf( offset[1], -0.5f, 0.0f );
 117
 118    /*
 119     * Animation blending
 120     * ===========================================
 121     */
 122
 123    /* scalar blending information */
 124    float speed = v3_length( phys->rb.v );
 125
 126    /* sliding */
 127    {
 128       float desired = vg_clampf( lslip, 0.0f, 1.0f );
 129       player.fslide = vg_lerpf( player.fslide, desired, 2.4f*vg.time_delta);
 130    }
 131
 132    /* movement information */
 133    {
 134       float dirz = phys->reverse > 0.0f? 0.0f: 1.0f,
 135             dirx = phys->slip < 0.0f?    0.0f: 1.0f,
 136             fly  = phys->in_air?         1.0f: 0.0f;
 137
 138       player.fdirz = vg_lerpf( player.fdirz, dirz, 2.4f*vg.time_delta );
 139       player.fdirx = vg_lerpf( player.fdirx, dirx, 0.6f*vg.time_delta );
 140       player.ffly  = vg_lerpf( player.ffly, fly,   2.4f*vg.time_delta );
 141    }
 142
 143    struct skeleton *sk = &player.mdl.sk;
 144
 145    mdl_keyframe apose[32], bpose[32];
 146    mdl_keyframe ground_pose[32];
 147    {
 148       /* when the player is moving fast he will crouch down a little bit */
 149       float stand = 1.0f - vg_clampf( speed * 0.03f, 0.0f, 1.0f );
 150       player.fstand = vg_lerpf( player.fstand, stand, 6.0f*vg.time_delta );
 151
 152       /* stand/crouch */
 153       float dir_frame   = player.fdirz * (15.0f/30.0f),
 154             stand_blend = offset[1]*-2.0f;
 155
 156       skeleton_sample_anim( sk, player.mdl.anim_stand, dir_frame, apose );
 157       skeleton_sample_anim( sk, player.mdl.anim_highg, dir_frame, bpose );
 158       skeleton_lerp_pose( sk, apose, bpose, stand_blend, apose );
 159
 160       /* sliding */
 161       float slide_frame = player.fdirx * (15.0f/30.0f);
 162       skeleton_sample_anim( sk, player.mdl.anim_slide, slide_frame, bpose );
 163       skeleton_lerp_pose( sk, apose, bpose, player.fslide, apose );
 164
 165       /* pushing */
 166       player.fpush = vg_lerpf( player.fpush,
 167                                player.phys.pushing,
 168                                6.0f*vg.time_delta );
 169
 170       float pt = player.phys.push_time;
 171       if( phys->reverse > 0.0f )
 172          skeleton_sample_anim( sk, player.mdl.anim_push, pt, bpose );
 173       else
 174          skeleton_sample_anim( sk, player.mdl.anim_push_reverse, pt, bpose );
 175
 176       skeleton_lerp_pose( sk, apose, bpose, player.fpush, apose );
 177
 178       /* trick setup */
 179       float jump_start_frame = 14.0f/30.0f;
 180
 181       player.fjump = vg_lerpf( player.fjump, phys->jump, 8.4f*vg.time_delta );
 182
 183       float setup_frame = phys->jump * jump_start_frame,
 184             setup_blend = vg_minf( player.fjump, 1.0f );
 185
 186       float jump_frame = (vg.time - player.jump_time) + jump_start_frame;
 187       if( jump_frame >= jump_start_frame && jump_frame <= (40.0f/30.0f) )
 188          setup_frame = jump_frame;
 189
 190       struct skeleton_anim *jump_anim = phys->jump_dir?
 191                                         player.mdl.anim_ollie:
 192                                         player.mdl.anim_ollie_reverse;
 193
 194       skeleton_sample_anim_clamped( sk, jump_anim, setup_frame, bpose );
 195       skeleton_lerp_pose( sk, apose, bpose, setup_blend, ground_pose );
 196    }
 197
 198    mdl_keyframe air_pose[32];
 199    {
 200       float target = -vg_get_axis("horizontal");
 201       player.fairdir = vg_lerpf( player.fairdir, target, 2.4f*vg.time_delta );
 202
 203       float air_frame = (player.fairdir*0.5f+0.5f) * (15.0f/30.0f);
 204
 205       skeleton_sample_anim( sk, player.mdl.anim_air, air_frame, apose );
 206
 207       static v2f grab_choice;
 208       v2_lerp( grab_choice, (v2f){ vg_get_axis("h1"), vg_get_axis("v1") },
 209                             0.04f, grab_choice );
 210
 211       float ang = atan2f( grab_choice[0], grab_choice[1] ),
 212             ang_unit = (ang+VG_PIf) * (1.0f/VG_TAUf),
 213             grab_frame = ang_unit * (15.0f/30.0f);
 214
 215       skeleton_sample_anim( sk, player.mdl.anim_grabs, grab_frame, bpose );
 216       skeleton_lerp_pose( sk, apose, bpose, phys->grab, air_pose );
 217    }
 218
 219    skeleton_lerp_pose( sk, ground_pose, air_pose, player.ffly, apose );
 220
 221    float add_grab_mod = 1.0f - player.ffly*phys->grab;
 222
 223    /* additive effects */
 224    {
 225       u32 apply_to[] = { player.mdl.id_hip,
 226                          player.mdl.id_ik_hand_l,
 227                          player.mdl.id_ik_hand_r,
 228                          player.mdl.id_ik_elbow_l,
 229                          player.mdl.id_ik_elbow_r };
 230
 231       for( int i=0; i<vg_list_size(apply_to); i ++ )
 232       {
 233          apose[apply_to[i]-1].co[0] += offset[0]*add_grab_mod;
 234          apose[apply_to[i]-1].co[2] += offset[2]*add_grab_mod;
 235       }
 236    }
 237
 238    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_defer_ik );
 239    skeleton_apply_ik_pass( &player.mdl.sk );
 240    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_deffered_only );
 241
 242    v3_copy( player.mdl.sk.final_mtx[player.mdl.id_head-1][3],
 243                player.mdl.cam_pos );
 244    skeleton_apply_inverses( &player.mdl.sk );
 245    skeleton_apply_transform( &player.mdl.sk, phys->rb.to_world );
 246
 247    skeleton_debug( &player.mdl.sk );
 248 }
 249
 250 static void player_animate_death_cam(void)
 251 {
 252    v3f delta;
 253    v3f head_pos;
 254    v3_copy( player.mdl.ragdoll[0].rb.co, head_pos );
 255
 256    v3_sub( head_pos, player.camera_pos, delta );
 257    v3_normalize( delta );
 258
 259    v3f follow_pos;
 260    v3_muladds( head_pos, delta, -2.5f, follow_pos );
 261    v3_lerp( player.camera_pos, follow_pos, 0.1f, player.camera_pos );
 262
 263    /*
 264     * Make sure the camera stays above the ground
 265     */
 266    v3f min_height = {0.0f,1.0f,0.0f};
 267
 268    v3f sample;
 269    v3_add( player.camera_pos, min_height, sample );
 270    ray_hit hit;
 271    hit.dist = min_height[1]*2.0f;
 272
 273    if( ray_world( sample, (v3f){0.0f,-1.0f,0.0f}, &hit ))
 274       v3_add( hit.pos, min_height, player.camera_pos );
 275
 276    player.camera_pos[1] =
 277       vg_maxf( wrender.height + 2.0f, player.camera_pos[1] );
 278
 279    player.angles[0] = atan2f( delta[0], -delta[2] );
 280    player.angles[1] = -asinf( delta[1] );
 281 }
 282
 283 static void player_animate_camera(void)
 284 {
 285    struct player_phys *phys = &player.phys;
 286
 287    static v3f lerp_cam = {0.0f,0.0f,0.0f};
 288    v3f cam_pos;
 289
 290    player.fonboard = vg_lerpf( player.fonboard, phys->on_board, vg.time_delta );
 291
 292    if( phys->on_board )
 293    {
 294       v3f offs = { -0.4f, 0.15f, 0.0f };
 295       v3_lerp( lerp_cam, player.mdl.cam_pos, 0.8f, lerp_cam );
 296       v3_add( lerp_cam, offs, cam_pos );
 297
 298       /* Look angles */
 299       v3_lerp( phys->vl, phys->rb.v, 0.05f, phys->vl );
 300
 301       float yaw = atan2f(  phys->vl[0], -phys->vl[2] ),
 302           pitch = atan2f( -phys->vl[1],
 303                 sqrtf(
 304                   phys->vl[0]*phys->vl[0] + phys->vl[2]*phys->vl[2]
 305                 )) * 0.7f;
 306
 307       player.angles[0] = yaw;
 308       player.angles[1] = vg_lerpf( player.angles[1], pitch + 0.30f,
 309                                                          player.fonboard );
 310
 311       /* Camera shake */
 312       static v2f shake_damp = {0.0f,0.0f};
 313       v2f shake = { vg_randf()-0.5f, vg_randf()-0.5f };
 314       v2_muls( shake, v3_length(phys->rb.v)*0.3f
 315                            * (1.0f+fabsf(phys->slip)), shake);
 316
 317       v2_lerp( shake_damp, shake, 0.01f, shake_damp );
 318       shake_damp[0] *= 0.2f;
 319
 320       v2_muladds( player.angles, shake_damp, 0.1f, player.angles );
 321       m4x3_mulv( phys->rb.to_world, cam_pos, player.camera_pos );
 322    }
 323    else
 324    {
 325       float speed = vg.time_delta * k_look_speed;
 326       player.angles[0] += vg_get_axis( "horizontal" ) * speed;
 327       player.angles[1] += vg_get_axis( "vertical" ) * speed;
 328
 329       player.angles[1] = vg_clampf( player.angles[1],
 330                                        -k_pitch_limit, k_pitch_limit );
 331
 332       float s =  sinf(player.angles[0]) * 0.2f,
 333             c = -cosf(player.angles[0]) * 0.2f;
 334       v3f forward_dir = { s,0.15f,c };
 335
 336
 337       m4x3f mtx;
 338       v4f rot;
 339       q_axis_angle( rot, (v3f){0.0f,1.0f,0.0f},
 340                               -player.angles[0] -VG_PIf*0.5f );
 341       q_m3x3( rot, mtx );
 342       v3_copy( phys->rb.to_world[3], mtx[3] );
 343
 344       m4x3_mulv( mtx, player.mdl.cam_pos, cam_pos );
 345       v3_add( cam_pos, forward_dir, player.camera_pos );
 346       v3_lerp( phys->vl, phys->rb.v, 0.3f, phys->vl );
 347    }
 348 }
 349
 350 #endif /* PLAYER_ANIMATION_H */