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    struct player_phys *phys = &player.phys;
  13
  14    mdl_keyframe apose[32], bpose[32];
  15    struct skeleton *sk = &player.mdl.sk;
  16
  17    float walk_norm = (float)player.mdl.anim_walk->length/30.0f,
  18          run_norm  = (float)player.mdl.anim_run->length/30.0f,
  19          t = player.walk_timer,
  20          l = vg_get_axis("grabr") * 0.5f + 0.5f;
  21
  22    skeleton_sample_anim( sk, player.mdl.anim_walk, t*walk_norm, apose );
  23    skeleton_sample_anim( sk, player.mdl.anim_run,  t*run_norm, bpose );
  24
  25    skeleton_lerp_pose( sk, apose, bpose, l, apose );
  26
  27    float idle_walk = vg_minf( l * 10.0f, 1.0f);
  28
  29    skeleton_sample_anim( sk, player.mdl.anim_idle, vg_time*0.1f, bpose );
  30    skeleton_lerp_pose( sk, apose, bpose, 1.0f-idle_walk, apose );
  31
  32    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_defer_ik );
  33    skeleton_apply_ik_pass( &player.mdl.sk );
  34    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_deffered_only );
  35
  36    v3_copy( player.mdl.sk.final_mtx[player.mdl.id_head-1][3],
  37                player.mdl.cam_pos );
  38
  39    skeleton_apply_inverses( &player.mdl.sk );
  40
  41    m4x3f mtx;
  42    v4f rot;
  43    q_axis_angle( rot, (v3f){0.0f,1.0f,0.0f}, -player.angles[0] - VG_PIf*0.5f );
  44    q_m3x3( rot, mtx );
  45    v3_copy( phys->rb.to_world[3], mtx[3] );
  46
  47    skeleton_apply_transform( &player.mdl.sk, mtx );
  48    skeleton_debug( &player.mdl.sk );
  49 }
  50
  51 static void player_animate(void)
  52 {
  53    struct player_phys *phys = &player.phys;
  54
  55    if( !phys->on_board )
  56    {
  57       player_animate_offboard();
  58       return;
  59    }
  60
  61    /* Camera position */
  62    v3_sub( phys->rb.v, phys->v_last, phys->a );
  63    v3_copy( phys->rb.v, phys->v_last );
  64
  65    v3_add( phys->m, phys->a, phys->m );
  66    v3_lerp( phys->m, (v3f){0.0f,0.0f,0.0f}, 0.1f, phys->m );
  67
  68    phys->m[0] = vg_clampf( phys->m[0], -2.0f, 2.0f );
  69    phys->m[1] = vg_clampf( phys->m[1], -2.0f, 2.0f );
  70    phys->m[2] = vg_clampf( phys->m[2], -2.0f, 2.0f );
  71    v3_lerp( phys->bob, phys->m, 0.2f, phys->bob );
  72
  73    /* Head */
  74    float lslip = fabsf(phys->slip);
  75
  76    float kheight = 2.0f,
  77          kleg = 0.6f;
  78
  79    v3f offset;
  80    v3_zero( offset );
  81    m3x3_mulv( phys->rb.to_local, phys->bob, offset );
  82
  83    static float speed_wobble = 0.0f, speed_wobble_2 = 0.0f;
  84
  85    float kickspeed = vg_clampf(v3_length(phys->rb.v)*(1.0f/40.0f), 0.0f, 1.0f);
  86    float kicks = (vg_randf()-0.5f)*2.0f*kickspeed;
  87    float sign = vg_signf( kicks );
  88    speed_wobble = vg_lerpf( speed_wobble, kicks*kicks*sign, 0.1f );
  89    speed_wobble_2 = vg_lerpf( speed_wobble_2, speed_wobble, 0.04f );
  90
  91    offset[0] *= 0.26f;
  92    offset[0] += speed_wobble_2*3.0f;
  93
  94    offset[1] *= -0.3f;
  95    offset[2] *= 0.01f;
  96
  97    offset[0] = vg_clampf( offset[0], -0.8f, 0.8f );
  98    offset[1] = vg_clampf( offset[1], -0.5f, 0.0f );
  99
 100    /*
 101     * Animation blending
 102     * ===========================================
 103     */
 104
 105    /* scalar blending information */
 106    float speed = v3_length( phys->rb.v );
 107
 108    /* sliding */
 109    {
 110       float desired = vg_clampf( lslip, 0.0f, 1.0f );
 111       player.fslide = vg_lerpf( player.fslide, desired, 0.04f );
 112    }
 113
 114    /* movement information */
 115    {
 116       float dirz = phys->reverse > 0.0f? 0.0f: 1.0f,
 117             dirx = phys->slip < 0.0f?    0.0f: 1.0f,
 118             fly  = phys->in_air?         1.0f: 0.0f;
 119
 120       player.fdirz = vg_lerpf( player.fdirz, dirz, 0.04f );
 121       player.fdirx = vg_lerpf( player.fdirx, dirx, 0.01f );
 122       player.ffly  = vg_lerpf( player.ffly, fly, 0.04f );
 123    }
 124
 125    struct skeleton *sk = &player.mdl.sk;
 126
 127    mdl_keyframe apose[32], bpose[32];
 128    mdl_keyframe ground_pose[32];
 129    {
 130       /* when the player is moving fast he will crouch down a little bit */
 131       float stand = 1.0f - vg_clampf( speed * 0.03f, 0.0f, 1.0f );
 132       player.fstand = vg_lerpf( player.fstand, stand, 0.1f );
 133
 134       /* stand/crouch */
 135       float dir_frame   = player.fdirz * (15.0f/30.0f),
 136             stand_blend = offset[1]*-2.0f;
 137
 138       skeleton_sample_anim( sk, player.mdl.anim_stand, dir_frame, apose );
 139       skeleton_sample_anim( sk, player.mdl.anim_highg, dir_frame, bpose );
 140       skeleton_lerp_pose( sk, apose, bpose, stand_blend, apose );
 141
 142       /* sliding */
 143       float slide_frame = player.fdirx * (15.0f/30.0f);
 144       skeleton_sample_anim( sk, player.mdl.anim_slide, slide_frame, bpose );
 145       skeleton_lerp_pose( sk, apose, bpose, player.fslide, apose );
 146
 147       /* pushing */
 148       player.fpush = vg_lerpf( player.fpush, player.pushing, 0.1f );
 149
 150       float pt = player.push_time;
 151       if( phys->reverse > 0.0f )
 152          skeleton_sample_anim( sk, player.mdl.anim_push, pt, bpose );
 153       else
 154          skeleton_sample_anim( sk, player.mdl.anim_push_reverse, pt, bpose );
 155
 156       skeleton_lerp_pose( sk, apose, bpose, player.fpush, apose );
 157
 158       /* trick setup */
 159       float jump_start_frame = 14.0f/30.0f;
 160
 161       player.fjump = vg_lerpf( player.fjump, phys->jump, 0.14f );
 162
 163       float setup_frame = phys->jump * jump_start_frame,
 164             setup_blend = vg_minf( player.fjump, 1.0f );
 165
 166       float jump_frame = (vg_time - player.jump_time) + jump_start_frame;
 167       if( jump_frame >= jump_start_frame && jump_frame <= (40.0f/30.0f) )
 168          setup_frame = jump_frame;
 169
 170       struct skeleton_anim *jump_anim = phys->jump_dir?
 171                                         player.mdl.anim_ollie:
 172                                         player.mdl.anim_ollie_reverse;
 173
 174       skeleton_sample_anim_clamped( sk, jump_anim, setup_frame, bpose );
 175       skeleton_lerp_pose( sk, apose, bpose, setup_blend, ground_pose );
 176    }
 177
 178    mdl_keyframe air_pose[32];
 179    {
 180       float target = -vg_get_axis("horizontal");
 181       player.fairdir = vg_lerpf( player.fairdir, target, 0.04f );
 182
 183       float air_frame = (player.fairdir*0.5f+0.5f) * (15.0f/30.0f);
 184
 185       skeleton_sample_anim( sk, player.mdl.anim_air, air_frame, apose );
 186
 187       static v2f grab_choice;
 188       v2_lerp( grab_choice, (v2f){ vg_get_axis("h1"), vg_get_axis("v1") },
 189                             0.04f, grab_choice );
 190
 191       float ang = atan2f( grab_choice[0], grab_choice[1] ),
 192             ang_unit = (ang+VG_PIf) * (1.0f/VG_TAUf),
 193             grab_frame = ang_unit * (15.0f/30.0f);
 194
 195       skeleton_sample_anim( sk, player.mdl.anim_grabs, grab_frame, bpose );
 196       skeleton_lerp_pose( sk, apose, bpose, phys->grab, air_pose );
 197    }
 198
 199    skeleton_lerp_pose( sk, ground_pose, air_pose, player.ffly, apose );
 200
 201    float add_grab_mod = 1.0f - player.ffly*phys->grab;
 202
 203    /* additive effects */
 204    {
 205       u32 apply_to[] = { player.mdl.id_hip,
 206                          player.mdl.id_ik_hand_l,
 207                          player.mdl.id_ik_hand_r,
 208                          player.mdl.id_ik_elbow_l,
 209                          player.mdl.id_ik_elbow_r };
 210
 211       for( int i=0; i<vg_list_size(apply_to); i ++ )
 212       {
 213          apose[apply_to[i]-1].co[0] += offset[0]*add_grab_mod;
 214          apose[apply_to[i]-1].co[2] += offset[2]*add_grab_mod;
 215       }
 216    }
 217
 218    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_defer_ik );
 219    skeleton_apply_ik_pass( &player.mdl.sk );
 220    skeleton_apply_pose( &player.mdl.sk, apose, k_anim_apply_deffered_only );
 221
 222    v3_copy( player.mdl.sk.final_mtx[player.mdl.id_head-1][3],
 223                player.mdl.cam_pos );
 224    skeleton_apply_inverses( &player.mdl.sk );
 225    skeleton_apply_transform( &player.mdl.sk, phys->rb.to_world );
 226
 227    skeleton_debug( &player.mdl.sk );
 228 }
 229
 230 static void player_animate_death_cam(void)
 231 {
 232    v3f delta;
 233    v3f head_pos;
 234    v3_copy( player.mdl.ragdoll[0].rb.co, head_pos );
 235
 236    v3_sub( head_pos, player.camera_pos, delta );
 237    v3_normalize( delta );
 238
 239    v3f follow_pos;
 240    v3_muladds( head_pos, delta, -2.5f, follow_pos );
 241    v3_lerp( player.camera_pos, follow_pos, 0.1f, player.camera_pos );
 242
 243    /*
 244     * Make sure the camera stays above the ground
 245     */
 246    v3f min_height = {0.0f,1.0f,0.0f};
 247
 248    v3f sample;
 249    v3_add( player.camera_pos, min_height, sample );
 250    ray_hit hit;
 251    hit.dist = min_height[1]*2.0f;
 252
 253    if( ray_world( sample, (v3f){0.0f,-1.0f,0.0f}, &hit ))
 254       v3_add( hit.pos, min_height, player.camera_pos );
 255
 256    player.camera_pos[1] =
 257       vg_maxf( wrender.height + 2.0f, player.camera_pos[1] );
 258
 259    player.angles[0] = atan2f( delta[0], -delta[2] );
 260    player.angles[1] = -asinf( delta[1] );
 261 }
 262
 263 static void player_animate_camera(void)
 264 {
 265    struct player_phys *phys = &player.phys;
 266
 267    static v3f lerp_cam = {0.0f,0.0f,0.0f};
 268    v3f cam_pos;
 269
 270    player.fonboard = vg_lerpf(player.fonboard, phys->on_board, ktimestep*1.0f);
 271
 272    if( phys->on_board )
 273    {
 274       v3f offs = { -0.4f, 0.15f, 0.0f };
 275       v3_lerp( lerp_cam, player.mdl.cam_pos, 0.8f, lerp_cam );
 276       v3_add( lerp_cam, offs, cam_pos );
 277
 278       /* Look angles */
 279       v3_lerp( phys->vl, phys->rb.v, 0.05f, phys->vl );
 280
 281       float yaw = atan2f(  phys->vl[0], -phys->vl[2] ),
 282           pitch = atan2f( -phys->vl[1],
 283                 sqrtf(
 284                   phys->vl[0]*phys->vl[0] + phys->vl[2]*phys->vl[2]
 285                 )) * 0.7f;
 286
 287       player.angles[0] = yaw;
 288       player.angles[1] = vg_lerpf( player.angles[1], pitch + 0.30f,
 289                                                          player.fonboard );
 290
 291       /* Camera shake */
 292       static v2f shake_damp = {0.0f,0.0f};
 293       v2f shake = { vg_randf()-0.5f, vg_randf()-0.5f };
 294       v2_muls( shake, v3_length(phys->rb.v)*0.3f
 295                            * (1.0f+fabsf(phys->slip)), shake);
 296
 297       v2_lerp( shake_damp, shake, 0.01f, shake_damp );
 298       shake_damp[0] *= 0.2f;
 299
 300       v2_muladds( player.angles, shake_damp, 0.1f, player.angles );
 301       m4x3_mulv( phys->rb.to_world, cam_pos, player.camera_pos );
 302    }
 303    else
 304    {
 305       float speed = ktimestep * k_look_speed;
 306       player.angles[0] += vg_get_axis( "horizontal" ) * speed;
 307       player.angles[1] += vg_get_axis( "vertical" ) * speed;
 308
 309       player.angles[1] = vg_clampf( player.angles[1],
 310                                        -k_pitch_limit, k_pitch_limit );
 311
 312       float s =  sinf(player.angles[0]) * 0.2f,
 313             c = -cosf(player.angles[0]) * 0.2f;
 314       v3f forward_dir = { s,0.15f,c };
 315
 316
 317       m4x3f mtx;
 318       v4f rot;
 319       q_axis_angle( rot, (v3f){0.0f,1.0f,0.0f},
 320                               -player.angles[0] -VG_PIf*0.5f );
 321       q_m3x3( rot, mtx );
 322       v3_copy( phys->rb.to_world[3], mtx[3] );
 323
 324       m4x3_mulv( mtx, player.mdl.cam_pos, cam_pos );
 325       v3_add( cam_pos, forward_dir, player.camera_pos );
 326       v3_lerp( phys->vl, phys->rb.v, 0.3f, phys->vl );
 327    }
 328 }
 329
 330 #endif /* PLAYER_ANIMATION_H */