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    {
  34       /* construct plane equation for reciever gate */
  35       v4f plane;
  36       q_mulv( player->gate_waiting->q[1], (v3f){0.0f,0.0f,1.0f}, plane );
  37       plane[3] = v3_dot( plane, player->gate_waiting->co[1] );
  38
  39       /* check camera polarity */
  40       if( v3_dot( player->cam.pos, plane ) < plane[3] )
  41       {
  42          vg_success( "Plane cleared\n" );
  43          player_apply_transport_to_cam( player->gate_waiting->transport );
  44          player->gate_waiting = NULL;
  45          player->viewable_world = get_active_world();
  46       }
  47       else
  48       {
  49          /* de-transform camera and player back */
  50          m4x3f inverse;
  51          m4x3_invert_affine( player->gate_waiting->transport, inverse );
  52          m4x3_mulv( inverse, player->cam.pos, player->cam.pos );
  53
  54          struct skeleton *sk = &player->playeravatar->sk;
  55          skeleton_apply_transform( sk, inverse );
  56       }
  57    }
  58 }
  59
  60 VG_STATIC void player__cam_iterate( player_instance *player )
  61 {
  62    struct player_avatar *av = player->playeravatar;
  63
  64    if( player->subsystem == k_player_subsystem_walk )
  65    {
  66       v3_copy( (v3f){-0.1f,1.8f,0.0f}, player->fpv_viewpoint );
  67       v3_copy( (v3f){0.0f,0.0f,0.0f}, player->fpv_offset );
  68       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  69    }
  70    else
  71    {
  72       v3_copy( (v3f){0.0f,1.8f,0.0f}, player->fpv_viewpoint );
  73       v3_copy( (v3f){-0.35f,0.0f,0.0f}, player->fpv_offset );
  74       v3_copy( (v3f){0.0f,1.4f,0.0f}, player->tpv_offset );
  75    }
  76
  77    player->cam_velocity_constant = 0.25f;
  78    player->cam_velocity_coefficient = 0.7f;
  79
  80    /* lerping */
  81
  82    player->cam_velocity_influence_smooth = vg_lerpf(
  83          player->cam_velocity_influence_smooth,
  84          player->cam_velocity_influence,
  85          vg.frame_delta * 8.0f );
  86
  87    player->cam_velocity_coefficient_smooth = vg_lerpf(
  88          player->cam_velocity_coefficient_smooth,
  89          player->cam_velocity_coefficient,
  90          vg.frame_delta * 8.0f );
  91
  92    player->cam_velocity_constant_smooth = vg_lerpf(
  93          player->cam_velocity_constant_smooth,
  94          player->cam_velocity_constant,
  95          vg.frame_delta * 8.0f );
  96
  97    enum camera_mode target_mode = player->camera_mode;
  98
  99    if( player->subsystem == k_player_subsystem_dead )
 100       target_mode = k_cam_thirdperson;
 101
 102    player->camera_type_blend =
 103       vg_lerpf( player->camera_type_blend,
 104                 (target_mode == k_cam_firstperson)? 1.0f: 0.0f,
 105                 5.0f * vg.frame_delta );
 106
 107    v3_lerp( player->fpv_viewpoint_smooth, player->fpv_viewpoint,
 108          vg.frame_delta * 8.0f, player->fpv_viewpoint_smooth );
 109
 110    v3_lerp( player->fpv_offset_smooth, player->fpv_offset,
 111          vg.frame_delta * 8.0f, player->fpv_offset_smooth );
 112
 113    v3_lerp( player->tpv_offset_smooth, player->tpv_offset,
 114          vg.frame_delta * 8.0f, player->tpv_offset_smooth );
 115
 116    /* fov -- simple blend */
 117    /* FIXME: cl_fov */
 118    player->cam.fov = vg_lerpf( 97.0f, 118.0f, player->camera_type_blend );
 119
 120    /*
 121     * first person camera
 122     */
 123
 124    /* position */
 125    v3f fpv_pos, fpv_offset;
 126    m4x3_mulv( av->sk.final_mtx[ av->id_head-1 ],
 127                player->fpv_viewpoint_smooth, fpv_pos );
 128    m3x3_mulv( player->rb.to_world, player->fpv_offset_smooth, fpv_offset );
 129    v3_add( fpv_offset, fpv_pos, fpv_pos );
 130
 131    /* angles */
 132    v3f velocity_angles;
 133    v3_lerp( player->cam_velocity_smooth, player->rb.v, 4.0f*vg.frame_delta,
 134             player->cam_velocity_smooth );
 135
 136    v3f velocity_local;
 137    m3x3_mulv( player->invbasis, player->cam_velocity_smooth, velocity_local );
 138    player_vector_angles( velocity_angles, velocity_local,
 139                          player->cam_velocity_coefficient_smooth,
 140                          player->cam_velocity_constant_smooth );
 141
 142    float inf_fpv = player->cam_velocity_influence_smooth *
 143                    player->camera_type_blend,
 144          inf_tpv = player->cam_velocity_influence_smooth *
 145                    (1.0f-player->camera_type_blend);
 146
 147    camera_lerp_angles( player->angles, velocity_angles,
 148                         inf_fpv,
 149                         player->angles );
 150
 151    /*
 152     * Third person camera
 153     */
 154
 155    /* no idea what this technique is called, it acts like clamped position based
 156     * on some derivative of where the final camera would end up ....
 157     *
 158     * it is done in the local basis then transformed back */
 159
 160    v3f future;
 161    v3_muls( player->rb.v, 0.4f*vg.frame_delta, future );
 162    m3x3_mulv( player->invbasis, future, future );
 163
 164    v3f camera_follow_dir =
 165       { -sinf( player->angles[0] ) * cosf( player->angles[1] ),
 166          sinf( player->angles[1] ),
 167          cosf( player->angles[0] ) * cosf( player->angles[1] ) };
 168
 169    v3f v0;
 170    v3_sub( camera_follow_dir, future, v0 );
 171
 172    v3f follow_angles;
 173    v3_copy( player->angles, follow_angles );
 174    follow_angles[0] = atan2f( -v0[0], v0[2] );
 175    follow_angles[1] = 0.3f + velocity_angles[1] * 0.2f;
 176
 177    float ya = atan2f( -velocity_local[1], 30.0f );
 178
 179    follow_angles[1] = 0.3f + ya;
 180    camera_lerp_angles( player->angles, follow_angles,
 181                         inf_tpv,
 182                         player->angles );
 183
 184    v3f pco;
 185    v4f pq;
 186    rb_extrapolate( &player->rb, pco, pq );
 187    v3_lerp( player->tpv_lpf, pco, 20.0f*vg.frame_delta, player->tpv_lpf );
 188
 189    /* now move into world */
 190
 191    m3x3_mulv( player->basis, camera_follow_dir, camera_follow_dir );
 192    v3f tpv_pos, tpv_offset;
 193
 194    v3_muladds( player->tpv_lpf, camera_follow_dir, 1.8f, tpv_pos );
 195    q_mulv( pq, player->tpv_offset_smooth, tpv_offset );
 196    v3_add( tpv_offset, tpv_pos, tpv_pos );
 197    v3_muladds( tpv_pos, player->cam_velocity_smooth, -0.025f, tpv_pos );
 198
 199    /*
 200     * Blend cameras
 201     */
 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
 207    float Fd = -player->cam_land_punch_v * k_cam_damp,
 208          Fs = -player->cam_land_punch   * k_cam_spring;
 209    player->cam_land_punch   += player->cam_land_punch_v * vg.frame_delta;
 210    player->cam_land_punch_v += ( Fd + Fs ) * vg.frame_delta;
 211    player->cam.angles[1] += player->cam_land_punch;
 212
 213    /* portal transitions */
 214    player_camera_portal_correction( player );
 215 }
 216
 217 VG_STATIC void player_look( player_instance *player, v3f angles )
 218 {
 219    angles[2] = 0.0f;
 220    v2_muladds( angles, vg.mouse_delta, 0.0025f, angles );
 221
 222    if( vg_input.controller_should_use_trackpad_look )
 223    {
 224       static v2f last_input;
 225       static v2f vel;
 226       static v2f vel_smooth;
 227
 228       v2f input = { player->input_js2h->axis.value,
 229                     player->input_js2v->axis.value };
 230
 231       if( (v2_length2(last_input) > 0.001f) && (v2_length2(input) > 0.001f) )
 232       {
 233          v2_sub( input, last_input, vel );
 234          v2_muls( vel, 1.0f/vg.time_delta, vel );
 235       }
 236       else
 237       {
 238          v2_zero( vel );
 239       }
 240
 241       v2_lerp( vel_smooth, vel, vg.time_delta*8.0f, vel_smooth );
 242
 243       v2_muladds( angles, vel_smooth, vg.time_delta, angles );
 244       v2_copy( input, last_input );
 245    }
 246    else
 247    {
 248       angles[0] += player->input_js2h->axis.value * vg.time_delta * 4.0f;
 249       angles[1] += player->input_js2v->axis.value * vg.time_delta * 4.0f;
 250    }
 251
 252    angles[1] = vg_clampf( angles[1], -VG_PIf*0.5f, VG_PIf*0.5f );
 253 }
 254
 255 #endif /* PLAYER_COMMON_C */