player_common.c

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