player_common.c

   1 #ifndef PLAYER_COMMON_C
   2 #define PLAYER_COMMON_C
   3
   4 #include "player.h"
   5 #include "conf.h"
   6
   7 VG_STATIC float
   8    k_cam_spring            = 20.0f,
   9    k_cam_damp              = 6.7f;
  10
  11 VG_STATIC void player_vector_angles( v3f angles, v3f v, float C, float k )
  12 {
  13    float yaw = atan2f( v[0], -v[2] ),
  14        pitch = atan2f
  15                (
  16                    -v[1],
  17                    sqrtf
  18                    (
  19                      v[0]*v[0] + v[2]*v[2]
  20                    )
  21                ) * C + k;
  22
  23    angles[0] = yaw;
  24    angles[1] = pitch;
  25    angles[2] = 0.0f;
  26 }
  27
  28 VG_STATIC float player_get_heading_yaw( player_instance *player )
  29 {
  30    v3f xz;
  31    q_mulv( player->rb.q, (v3f){ 0.0f,0.0f,1.0f }, xz );
  32    m3x3_mulv( player->invbasis, xz, xz );
  33    return atan2f( xz[0], xz[2] );
  34 }
  35
  36 VG_STATIC void player_camera_portal_correction( player_instance *player )
  37 {
  38    if( player->gate_waiting ){
  39       /* construct plane equation for reciever gate */
  40       v4f plane;
  41       q_mulv( player->gate_waiting->q[1], (v3f){0.0f,0.0f,1.0f}, plane );
  42       plane[3] = v3_dot( plane, player->gate_waiting->co[1] );
  43
  44       /* check camera polarity */
  45       if( v3_dot( player->cam.pos, plane ) < plane[3] ) {
  46          vg_success( "Plane cleared\n" );
  47          player_apply_transport_to_cam( player->gate_waiting->transport );
  48          player->gate_waiting = NULL;
  49          player->viewable_world = get_active_world();
  50       }
  51       else{
  52          /* de-transform camera and player back */
  53          m4x3f inverse;
  54          m4x3_invert_affine( player->gate_waiting->transport, inverse );
  55          m4x3_mulv( inverse, player->cam.pos, player->cam.pos );
  56
  57          struct skeleton *sk = &player->playeravatar->sk;
  58          skeleton_apply_transform( sk, inverse );
  59       }
  60    }
  61 }
  62
  63 static v3f TEMP_TPV_EXTRA;
  64
  65 VG_STATIC void player__cam_iterate( player_instance *player )
  66 {
  67    struct player_avatar *av = player->playeravatar;
  68
  69    if( player->subsystem == k_player_subsystem_walk ){
  70       v3_copy( (v3f){-0.1f,1.8f,0.0f}, player->fpv_viewpoint );
  71       v3_copy( (v3f){0.0f,0.0f,0.0f}, player->fpv_offset );
  72       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  73    }
  74    else{
  75       v3_copy( (v3f){-0.15f,1.75f,0.0f}, player->fpv_viewpoint );
  76 #if 0
  77       v3_copy( (v3f){-0.35f,0.0f,0.0f}, player->fpv_offset );
  78 #endif
  79       v3_copy( (v3f){0.0f,0.0f,0.0f}, player->fpv_offset );
  80       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  81       v3_add( TEMP_TPV_EXTRA, player->tpv_offset, player->tpv_offset );
  82    }
  83
  84    player->cam_velocity_constant = 0.25f;
  85    player->cam_velocity_coefficient = 0.7f;
  86
  87    /* lerping */
  88
  89    player->cam_velocity_influence_smooth = vg_lerpf(
  90          player->cam_velocity_influence_smooth,
  91          player->cam_velocity_influence,
  92          vg.frame_delta * 8.0f );
  93
  94    player->cam_velocity_coefficient_smooth = vg_lerpf(
  95          player->cam_velocity_coefficient_smooth,
  96          player->cam_velocity_coefficient,
  97          vg.frame_delta * 8.0f );
  98
  99    player->cam_velocity_constant_smooth = vg_lerpf(
 100          player->cam_velocity_constant_smooth,
 101          player->cam_velocity_constant,
 102          vg.frame_delta * 8.0f );
 103
 104    enum camera_mode target_mode = player->camera_mode;
 105
 106    if( player->subsystem == k_player_subsystem_dead )
 107       target_mode = k_cam_thirdperson;
 108
 109    player->camera_type_blend =
 110       vg_lerpf( player->camera_type_blend,
 111                 (target_mode == k_cam_firstperson)? 1.0f: 0.0f,
 112                 5.0f * vg.frame_delta );
 113
 114    v3_lerp( player->fpv_viewpoint_smooth, player->fpv_viewpoint,
 115          vg.frame_delta * 8.0f, player->fpv_viewpoint_smooth );
 116
 117    v3_lerp( player->fpv_offset_smooth, player->fpv_offset,
 118          vg.frame_delta * 8.0f, player->fpv_offset_smooth );
 119
 120    v3_lerp( player->tpv_offset_smooth, player->tpv_offset,
 121          vg.frame_delta * 8.0f, player->tpv_offset_smooth );
 122
 123    /* fov -- simple blend */
 124    float fov_skate = vg_lerpf( 97.0f, 135.0f, cl_fov ),
 125          fov_walk  = vg_lerpf( 90.0f, 110.0f, cl_fov );
 126
 127    player->cam.fov = vg_lerpf( fov_walk, fov_skate, player->camera_type_blend );
 128
 129    /*
 130     * first person camera
 131     */
 132
 133    /* position */
 134    v3f fpv_pos, fpv_offset;
 135    m4x3_mulv( av->sk.final_mtx[ av->id_head-1 ],
 136                player->fpv_viewpoint_smooth, fpv_pos );
 137    m3x3_mulv( player->rb.to_world, player->fpv_offset_smooth, fpv_offset );
 138    v3_add( fpv_offset, fpv_pos, fpv_pos );
 139
 140    /* angles */
 141    v3f velocity_angles;
 142    v3_lerp( player->cam_velocity_smooth, player->rb.v, 4.0f*vg.frame_delta,
 143             player->cam_velocity_smooth );
 144
 145    v3f velocity_local;
 146    m3x3_mulv( player->invbasis, player->cam_velocity_smooth, velocity_local );
 147    player_vector_angles( velocity_angles, velocity_local,
 148                          player->cam_velocity_coefficient_smooth,
 149                          player->cam_velocity_constant_smooth );
 150
 151    float inf_fpv = player->cam_velocity_influence_smooth *
 152                    player->camera_type_blend,
 153          inf_tpv = player->cam_velocity_influence_smooth *
 154                    (1.0f-player->camera_type_blend);
 155
 156    camera_lerp_angles( player->angles, velocity_angles,
 157                         inf_fpv,
 158                         player->angles );
 159
 160    /*
 161     * Third person camera
 162     */
 163
 164    /* no idea what this technique is called, it acts like clamped position based
 165     * on some derivative of where the final camera would end up ....
 166     *
 167     * it is done in the local basis then transformed back */
 168
 169    v3f future;
 170    v3_muls( player->rb.v, 0.4f*vg.frame_delta, future );
 171    m3x3_mulv( player->invbasis, future, future );
 172
 173    v3f camera_follow_dir =
 174       { -sinf( player->angles[0] ) * cosf( player->angles[1] ),
 175          sinf( player->angles[1] ),
 176          cosf( player->angles[0] ) * cosf( player->angles[1] ) };
 177
 178    v3f v0;
 179    v3_sub( camera_follow_dir, future, v0 );
 180
 181    v3f follow_angles;
 182    v3_copy( player->angles, follow_angles );
 183    follow_angles[0] = atan2f( -v0[0], v0[2] );
 184    follow_angles[1] = 0.3f + velocity_angles[1] * 0.2f;
 185
 186    float ya = atan2f( -velocity_local[1], 30.0f );
 187
 188    follow_angles[1] = 0.3f + ya;
 189    camera_lerp_angles( player->angles, follow_angles,
 190                         inf_tpv,
 191                         player->angles );
 192
 193    v3f pco;
 194    v4f pq;
 195    rb_extrapolate( &player->rb, pco, pq );
 196    v3_lerp( player->tpv_lpf, pco, 20.0f*vg.frame_delta, player->tpv_lpf );
 197
 198    /* now move into world */
 199
 200    m3x3_mulv( player->basis, camera_follow_dir, camera_follow_dir );
 201    v3f tpv_pos, tpv_offset;
 202
 203    v3_muladds( player->tpv_lpf, camera_follow_dir, 1.8f, tpv_pos );
 204    q_mulv( pq, player->tpv_offset_smooth, tpv_offset );
 205    v3_add( tpv_offset, tpv_pos, tpv_pos );
 206    v3_muladds( tpv_pos, player->cam_velocity_smooth, -0.025f, tpv_pos );
 207
 208    /*
 209     * Blend cameras
 210     */
 211    v3_lerp( tpv_pos, fpv_pos, player->camera_type_blend, player->cam.pos );
 212    v3_copy( player->angles, player->cam.angles );
 213
 214    float Fd = -player->cam_land_punch_v * k_cam_damp,
 215          Fs = -player->cam_land_punch   * k_cam_spring;
 216    player->cam_land_punch   += player->cam_land_punch_v * vg.frame_delta;
 217    player->cam_land_punch_v += ( Fd + Fs ) * vg.frame_delta;
 218    player->cam.angles[1] += player->cam_land_punch;
 219
 220    /* override camera */
 221    player->cam.angles[0] =
 222       vg_alerpf(  player->cam.angles[0], player->cam_override_angles[0],
 223                   player->cam_override_strength );
 224    player->cam.angles[1] =
 225       vg_lerpf ( player->cam.angles[1], player->cam_override_angles[1],
 226                  player->cam_override_strength );
 227    v3_lerp( player->cam.pos, player->cam_override_pos,
 228             player->cam_override_strength, player->cam.pos );
 229
 230    /* portal transitions */
 231    player_camera_portal_correction( player );
 232 }
 233
 234 VG_STATIC void player_look( player_instance *player, v3f angles )
 235 {
 236    angles[2] = 0.0f;
 237
 238    v2f mouse_input;
 239    v2_copy( vg.mouse_delta, mouse_input );
 240    if( cl_invert_y )
 241       mouse_input[1] *= -1.0f;
 242    v2_muladds( angles, mouse_input, 0.0025f, angles );
 243
 244    if( vg_input.controller_should_use_trackpad_look ){
 245       static v2f last_input;
 246       static v2f vel;
 247       static v2f vel_smooth;
 248
 249       v2f input = { player->input_js2h->axis.value,
 250                     player->input_js2v->axis.value };
 251
 252       if( cl_invert_y )
 253          input[1] *= -1.0f;
 254
 255       if( (v2_length2(last_input) > 0.001f) && (v2_length2(input) > 0.001f) ){
 256          v2_sub( input, last_input, vel );
 257          v2_muls( vel, 1.0f/vg.time_delta, vel );
 258       }
 259       else{
 260          v2_zero( vel );
 261       }
 262
 263       v2_lerp( vel_smooth, vel, vg.time_delta*8.0f, vel_smooth );
 264
 265       v2_muladds( angles, vel_smooth, vg.time_delta, angles );
 266       v2_copy( input, last_input );
 267    }
 268    else{
 269       angles[0] += player->input_js2h->axis.value * vg.time_delta * 4.0f;
 270
 271       float input_y = player->input_js2v->axis.value * vg.time_delta * 4.0f;
 272       if( cl_invert_y )
 273          input_y *= -1.0f;
 274
 275       angles[1] += input_y;
 276    }
 277
 278    angles[1] = vg_clampf( angles[1], -VG_PIf*0.5f, VG_PIf*0.5f );
 279 }
 280
 281 #endif /* PLAYER_COMMON_C */