player_common.c

   1 #ifndef PLAYER_COMMON_C
   2 #define PLAYER_COMMON_C
   3
   4 #include "player.h"
   5
   6 VG_STATIC void player_vector_angles( v3f angles, v3f v, float C, float k )
   7 {
   8    float yaw = atan2f( v[0], -v[2] ),
   9        pitch = atan2f
  10                (
  11                    -v[1],
  12                    sqrtf
  13                    (
  14                      v[0]*v[0] + v[2]*v[2]
  15                    )
  16                ) * C + k;
  17
  18    angles[0] = yaw;
  19    angles[1] = pitch;
  20 }
  21
  22 VG_STATIC float player_get_heading_yaw( player_instance *player )
  23 {
  24    v3f xz;
  25    q_mulv( player->rb.q, (v3f){ 0.0f,0.0f,1.0f }, xz );
  26    m3x3_mulv( player->invbasis, xz, xz );
  27    return atan2f( xz[0], xz[2] );
  28 }
  29
  30 VG_STATIC void player_camera_portal_correction( player_instance *player )
  31 {
  32    if( player->gate_waiting ){
  33       /* construct plane equation for reciever gate */
  34       v4f plane;
  35       q_mulv( player->gate_waiting->q[1], (v3f){0.0f,0.0f,1.0f}, plane );
  36       plane[3] = v3_dot( plane, player->gate_waiting->co[1] );
  37
  38       /* check camera polarity */
  39       if( v3_dot( player->cam.pos, plane ) < plane[3] ) {
  40          vg_success( "Plane cleared\n" );
  41          player_apply_transport_to_cam( player->gate_waiting->transport );
  42          player->gate_waiting = NULL;
  43          player->viewable_world = get_active_world();
  44       }
  45       else{
  46          /* de-transform camera and player back */
  47          m4x3f inverse;
  48          m4x3_invert_affine( player->gate_waiting->transport, inverse );
  49          m4x3_mulv( inverse, player->cam.pos, player->cam.pos );
  50
  51          struct skeleton *sk = &player->playeravatar->sk;
  52          skeleton_apply_transform( sk, inverse );
  53       }
  54    }
  55 }
  56
  57 static v3f TEMP_TPV_EXTRA;
  58
  59 VG_STATIC void player__cam_iterate( player_instance *player )
  60 {
  61    struct player_avatar *av = player->playeravatar;
  62
  63    if( player->subsystem == k_player_subsystem_walk ){
  64       v3_copy( (v3f){-0.1f,1.8f,0.0f}, player->fpv_viewpoint );
  65       v3_copy( (v3f){0.0f,0.0f,0.0f}, player->fpv_offset );
  66       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  67    }
  68    else{
  69       v3_copy( (v3f){-0.15f,1.75f,0.0f}, player->fpv_viewpoint );
  70 #if 0
  71       v3_copy( (v3f){-0.35f,0.0f,0.0f}, player->fpv_offset );
  72 #endif
  73       v3_copy( (v3f){0.0f,0.0f,0.0f}, player->fpv_offset );
  74       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  75       v3_add( TEMP_TPV_EXTRA, player->tpv_offset, player->tpv_offset );
  76    }
  77
  78    player->cam_velocity_constant = 0.25f;
  79    player->cam_velocity_coefficient = 0.7f;
  80
  81    /* lerping */
  82
  83    player->cam_velocity_influence_smooth = vg_lerpf(
  84          player->cam_velocity_influence_smooth,
  85          player->cam_velocity_influence,
  86          vg.frame_delta * 8.0f );
  87
  88    player->cam_velocity_coefficient_smooth = vg_lerpf(
  89          player->cam_velocity_coefficient_smooth,
  90          player->cam_velocity_coefficient,
  91          vg.frame_delta * 8.0f );
  92
  93    player->cam_velocity_constant_smooth = vg_lerpf(
  94          player->cam_velocity_constant_smooth,
  95          player->cam_velocity_constant,
  96          vg.frame_delta * 8.0f );
  97
  98    enum camera_mode target_mode = player->camera_mode;
  99
 100    if( player->subsystem == k_player_subsystem_dead )
 101       target_mode = k_cam_thirdperson;
 102
 103    player->camera_type_blend =
 104       vg_lerpf( player->camera_type_blend,
 105                 (target_mode == k_cam_firstperson)? 1.0f: 0.0f,
 106                 5.0f * vg.frame_delta );
 107
 108    v3_lerp( player->fpv_viewpoint_smooth, player->fpv_viewpoint,
 109          vg.frame_delta * 8.0f, player->fpv_viewpoint_smooth );
 110
 111    v3_lerp( player->fpv_offset_smooth, player->fpv_offset,
 112          vg.frame_delta * 8.0f, player->fpv_offset_smooth );
 113
 114    v3_lerp( player->tpv_offset_smooth, player->tpv_offset,
 115          vg.frame_delta * 8.0f, player->tpv_offset_smooth );
 116
 117    /* fov -- simple blend */
 118    /* FIXME: cl_fov */
 119    player->cam.fov = vg_lerpf( 97.0f, 128.0f, player->camera_type_blend );
 120
 121    /*
 122     * first person camera
 123     */
 124
 125    /* position */
 126    v3f fpv_pos, fpv_offset;
 127    m4x3_mulv( av->sk.final_mtx[ av->id_head-1 ],
 128                player->fpv_viewpoint_smooth, fpv_pos );
 129    m3x3_mulv( player->rb.to_world, player->fpv_offset_smooth, fpv_offset );
 130    v3_add( fpv_offset, fpv_pos, fpv_pos );
 131
 132    /* angles */
 133    v3f velocity_angles;
 134    v3_lerp( player->cam_velocity_smooth, player->rb.v, 4.0f*vg.frame_delta,
 135             player->cam_velocity_smooth );
 136
 137    v3f velocity_local;
 138    m3x3_mulv( player->invbasis, player->cam_velocity_smooth, velocity_local );
 139    player_vector_angles( velocity_angles, velocity_local,
 140                          player->cam_velocity_coefficient_smooth,
 141                          player->cam_velocity_constant_smooth );
 142
 143    float inf_fpv = player->cam_velocity_influence_smooth *
 144                    player->camera_type_blend,
 145          inf_tpv = player->cam_velocity_influence_smooth *
 146                    (1.0f-player->camera_type_blend);
 147
 148    camera_lerp_angles( player->angles, velocity_angles,
 149                         inf_fpv,
 150                         player->angles );
 151
 152    /*
 153     * Third person camera
 154     */
 155
 156    /* no idea what this technique is called, it acts like clamped position based
 157     * on some derivative of where the final camera would end up ....
 158     *
 159     * it is done in the local basis then transformed back */
 160
 161    v3f future;
 162    v3_muls( player->rb.v, 0.4f*vg.frame_delta, future );
 163    m3x3_mulv( player->invbasis, future, future );
 164
 165    v3f camera_follow_dir =
 166       { -sinf( player->angles[0] ) * cosf( player->angles[1] ),
 167          sinf( player->angles[1] ),
 168          cosf( player->angles[0] ) * cosf( player->angles[1] ) };
 169
 170    v3f v0;
 171    v3_sub( camera_follow_dir, future, v0 );
 172
 173    v3f follow_angles;
 174    v3_copy( player->angles, follow_angles );
 175    follow_angles[0] = atan2f( -v0[0], v0[2] );
 176    follow_angles[1] = 0.3f + velocity_angles[1] * 0.2f;
 177
 178    float ya = atan2f( -velocity_local[1], 30.0f );
 179
 180    follow_angles[1] = 0.3f + ya;
 181    camera_lerp_angles( player->angles, follow_angles,
 182                         inf_tpv,
 183                         player->angles );
 184
 185    v3f pco;
 186    v4f pq;
 187    rb_extrapolate( &player->rb, pco, pq );
 188    v3_lerp( player->tpv_lpf, pco, 20.0f*vg.frame_delta, player->tpv_lpf );
 189
 190    /* now move into world */
 191
 192    m3x3_mulv( player->basis, camera_follow_dir, camera_follow_dir );
 193    v3f tpv_pos, tpv_offset;
 194
 195    v3_muladds( player->tpv_lpf, camera_follow_dir, 1.8f, tpv_pos );
 196    q_mulv( pq, player->tpv_offset_smooth, tpv_offset );
 197    v3_add( tpv_offset, tpv_pos, tpv_pos );
 198    v3_muladds( tpv_pos, player->cam_velocity_smooth, -0.025f, tpv_pos );
 199
 200    /*
 201     * Blend cameras
 202     */
 203    v3_lerp( tpv_pos, fpv_pos, player->camera_type_blend, player->cam.pos );
 204    v3_copy( player->angles, player->cam.angles );
 205
 206    float Fd = -player->cam_land_punch_v * k_cam_damp,
 207          Fs = -player->cam_land_punch   * k_cam_spring;
 208    player->cam_land_punch   += player->cam_land_punch_v * vg.frame_delta;
 209    player->cam_land_punch_v += ( Fd + Fs ) * vg.frame_delta;
 210    player->cam.angles[1] += player->cam_land_punch;
 211
 212    /* override camera */
 213    player->cam.angles[0] =
 214       vg_alerpf(  player->cam.angles[0], player->cam_override_angles[0],
 215                   player->cam_override_strength );
 216    player->cam.angles[1] =
 217       vg_lerpf ( player->cam.angles[1], player->cam_override_angles[1],
 218                  player->cam_override_strength );
 219    v3_lerp( player->cam.pos, player->cam_override_pos,
 220             player->cam_override_strength, player->cam.pos );
 221
 222    /* portal transitions */
 223    player_camera_portal_correction( player );
 224 }
 225
 226 VG_STATIC void player_look( player_instance *player, v3f angles )
 227 {
 228    angles[2] = 0.0f;
 229    v2_muladds( angles, vg.mouse_delta, 0.0025f, angles );
 230
 231    if( vg_input.controller_should_use_trackpad_look ){
 232       static v2f last_input;
 233       static v2f vel;
 234       static v2f vel_smooth;
 235
 236       v2f input = { player->input_js2h->axis.value,
 237                     player->input_js2v->axis.value };
 238
 239       if( (v2_length2(last_input) > 0.001f) && (v2_length2(input) > 0.001f) ){
 240          v2_sub( input, last_input, vel );
 241          v2_muls( vel, 1.0f/vg.time_delta, vel );
 242       }
 243       else{
 244          v2_zero( vel );
 245       }
 246
 247       v2_lerp( vel_smooth, vel, vg.time_delta*8.0f, vel_smooth );
 248
 249       v2_muladds( angles, vel_smooth, vg.time_delta, angles );
 250       v2_copy( input, last_input );
 251    }
 252    else{
 253       angles[0] += player->input_js2h->axis.value * vg.time_delta * 4.0f;
 254       angles[1] += player->input_js2v->axis.value * vg.time_delta * 4.0f;
 255    }
 256
 257    angles[1] = vg_clampf( angles[1], -VG_PIf*0.5f, VG_PIf*0.5f );
 258 }
 259
 260 #endif /* PLAYER_COMMON_C */