+ f32 ts = vg_lerpf( kf[0].time, kf[1].time, 1.0f-m_start ),
+ te = vg_lerpf( kf[1].time, kf[2].time, m_end );
+
+ l = te-ts;
+ t = (replay->cursor-ts)/l;
+
+ /*
+ * Adjust t, so that its derivative matches at the endpoints.
+ * Since t needs to go from 0 to 1, it will naturally change at
+ * different rates between keyframes. So this smooths it out.
+ *
+ * Newton method, going through standard direct quadratic eq has
+ * precision / other problems. Also we only care about 0>t>1.
+ */
+ f32 b = (kf[1].time-ts)/l,
+ x0 = 1.0-t;
+ for( u32 i=0; i<4; i ++ )
+ {
+ f32 ix0 = 1.0f-x0,
+ fx_x0 = 2.0f*b*x0*ix0 + ix0*ix0 - t,
+ fxd_x0 = 2.0f*(-2.0f*b*x0 + b + x0 - 1.0f);
+ x0 = x0 - (fx_x0/fxd_x0);
+ }
+ t = 1.0-x0;
+
+ f32 t0 = t*m_start+(1.0f-m_start),
+ t1 = t*m_end;
+
+ v3f ps, pe, as, ae;
+ f32 fs, fe;
+
+ /* first order */
+ v3_lerp( kf[0].cam.pos, kf[1].cam.pos, t0, ps );
+ vg_camera_lerp_angles( kf[0].cam.angles, kf[1].cam.angles,
+ t0, as );
+ fs = vg_lerpf( kf[0].cam.fov, kf[1].cam.fov, t0 );
+
+ v3_lerp( kf[1].cam.pos, kf[2].cam.pos, t1, pe );
+ vg_camera_lerp_angles( kf[1].cam.angles, kf[2].cam.angles,
+ t1, ae );
+ fe = vg_lerpf( kf[1].cam.fov, kf[2].cam.fov, t1 );
+
+ /* second order */
+ v3_lerp( ps, pe, t, cam->pos );
+ vg_camera_lerp_angles( as, ae, t, cam->angles );
+ cam->fov = vg_lerpf( fs, fe, t );
+ }
+ else
+ {
+ v3_lerp( kf[0].cam.pos, kf[1].cam.pos, t, cam->pos );
+ vg_camera_lerp_angles( kf[0].cam.angles, kf[1].cam.angles,
+ t, cam->angles );
+ cam->fov = vg_lerpf( kf[0].cam.fov, kf[1].cam.fov, t );
+ }
+ return;
+ }
+ }
+ }
+
+ replay_get_camera( replay, cam );
+}
+
+struct replay_rb
+{
+ v3f co, v, w;
+ v4f q;
+};
+
+void skaterift_record_frame( replay_buffer *replay, int force_gamestate )
+{
+ f64 delta = 9999999.9,
+ statedelta = 9999999.9;
+
+ if( replay->head )
+ delta = vg.time - replay->head->time;
+
+ if( replay->statehead )
+ statedelta = vg.time - replay->statehead->time;
+
+ const f64 k_replay_rate = 1.0/30.0,
+ k_gamestate_rate = 0.5;
+
+ int save_frame = 0,
+ save_state = 0,
+ save_glider = 0;
+
+ if( force_gamestate ) save_state = 1;
+ if( statedelta > k_gamestate_rate ) save_state = 1;
+ if( delta > k_replay_rate ) save_frame = 1;
+ if( save_state ) save_frame = 1;
+
+ if( localplayer.have_glider || localplayer.glider_orphan ||
+ localplayer.subsystem == k_player_subsystem_glide ){
+ save_glider = 1;
+ }
+
+ if( !save_frame ) return;
+
+ u16 gamestate_size = 0;
+ if( save_state ){
+ /* TODO: have as part of system struct */
+ gamestate_size = (u32 []){
+ [k_player_subsystem_walk ] = sizeof(struct player_walk_state),
+ [k_player_subsystem_drive] = 0,
+ [k_player_subsystem_skate] = sizeof(struct player_skate_state),
+ [k_player_subsystem_dead ] = localplayer.ragdoll.part_count *
+ sizeof(struct replay_rb),
+ [k_player_subsystem_glide] = sizeof(struct replay_rb),
+ }[ localplayer.subsystem ];
+ }
+
+ u16 animator_size = player_subsystems[localplayer.subsystem]->animator_size;
+
+ replay_frame *frame = replay_newframe( replay,
+ animator_size, gamestate_size,
+ localplayer.local_sfx_buffer_count,
+ save_glider );
+ frame->system = localplayer.subsystem;
+
+ if( save_state ){
+ replay_gamestate *gs =
+ replay_frame_data( frame, k_replay_framedata_internal_gamestate );
+
+ gs->current_run_version = world_static.current_run_version;
+ gs->drowned = localplayer.drowned;
+
+ /* permanent block */
+ memcpy( &gs->rb, &localplayer.rb, sizeof(rigidbody) );
+ memcpy( &gs->glider_rb, &player_glide.rb, sizeof(rigidbody) );
+ memcpy( &gs->cam_control, &localplayer.cam_control,
+ sizeof(struct player_cam_controller) );
+ v3_copy( localplayer.angles, gs->angles );
+
+ void *dst = replay_frame_data( frame, k_replay_framedata_gamestate );
+
+ /* subsytem/dynamic block */
+ if( localplayer.subsystem == k_player_subsystem_walk )
+ memcpy( dst, &player_walk.state, gamestate_size );
+ else if( localplayer.subsystem == k_player_subsystem_skate )
+ memcpy( dst, &player_skate.state, gamestate_size );
+ else if( localplayer.subsystem == k_player_subsystem_dead ){
+ struct replay_rb *arr = dst;
+ for( u32 i=0; i<localplayer.ragdoll.part_count; i ++ ){
+ rigidbody *rb = &localplayer.ragdoll.parts[i].rb;
+ v3_copy( rb->co, arr[i].co );
+ v3_copy( rb->w, arr[i].w );
+ v3_copy( rb->v, arr[i].v );
+ v4_copy( rb->q, arr[i].q );
+ }
+ }
+ else if( localplayer.subsystem == k_player_subsystem_glide ){
+ struct replay_rb *arr = dst;
+ rigidbody *rb = &player_glide.rb;
+ v3_copy( rb->co, arr[0].co );
+ v3_copy( rb->w, arr[0].w );
+ v3_copy( rb->v, arr[0].v );
+ v4_copy( rb->q, arr[0].q );
+ }
+ }
+
+ if( save_glider ){
+ struct replay_glider_data *inf =
+ replay_frame_data( frame, k_replay_framedata_glider );
+
+ inf->have_glider = localplayer.have_glider;
+ inf->glider_orphan = localplayer.glider_orphan;
+ inf->t = player_glide.t;
+ v3_copy( player_glide.rb.co, inf->co );
+ v4_copy( player_glide.rb.q, inf->q );
+ }
+
+ replay->cursor = vg.time;
+ replay->cursor_frame = frame;
+ frame->time = vg.time;
+
+ /* camera */
+ v3_copy( localplayer.cam.pos, frame->cam.pos );
+ if( localplayer.gate_waiting ){
+ m4x3_mulv( localplayer.gate_waiting->transport,
+ frame->cam.pos, frame->cam.pos );
+
+ v3f v0;
+ v3_angles_vector( localplayer.cam.angles, v0 );
+ m3x3_mulv( localplayer.gate_waiting->transport, v0, v0 );
+ v3_angles( v0, frame->cam.angles );
+ }
+ else
+ v3_copy( localplayer.cam.angles, frame->cam.angles );
+
+ frame->cam.fov = localplayer.cam.fov;
+
+ /* animator */
+ void *dst = replay_frame_data( frame, k_replay_framedata_animator ),
+ *src = player_subsystems[localplayer.subsystem]->animator_data;
+ memcpy( dst, src, animator_size );
+
+ /* sound effects */
+ memcpy( replay_frame_data( frame, k_replay_framedata_sfx ),
+ localplayer.local_sfx_buffer,
+ sizeof(struct net_sfx)*localplayer.local_sfx_buffer_count );
+
+ localplayer.local_sfx_buffer_count = 0;
+}
+
+static void skaterift_restore_frame( replay_frame *frame )
+{
+ replay_gamestate *gs =
+ replay_frame_data( frame, k_replay_framedata_internal_gamestate );
+ void *src = replay_frame_data( frame, k_replay_framedata_gamestate );
+ u16 src_size = frame->data_table[ k_replay_framedata_gamestate ][1];
+ world_static.current_run_version = gs->current_run_version;
+ localplayer.drowned = gs->drowned;
+
+ if(frame->system == k_player_subsystem_walk ){
+ memcpy( &player_walk.state, src, src_size );
+ }
+ else if( frame->system == k_player_subsystem_skate ){
+ memcpy( &player_skate.state, src, src_size );
+ }
+ else if( frame->system == k_player_subsystem_dead ){
+ player__dead_transition(0);
+ struct replay_rb *arr = src;
+
+ for( u32 i=0; i<localplayer.ragdoll.part_count; i ++ ){
+ struct ragdoll_part *part = &localplayer.ragdoll.parts[i];
+ rigidbody *rb = &part->rb;
+
+ v3_copy( arr[i].co, rb->co );
+ v3_copy( arr[i].w, rb->w );
+ v3_copy( arr[i].v, rb->v );
+ v4_copy( arr[i].q, rb->q );
+
+ v3_copy( arr[i].co, part->prev_co );
+ v4_copy( arr[i].q, part->prev_q );
+ rb_update_matrices( rb );
+ }
+ }
+ else if( frame->system == k_player_subsystem_glide ){
+ struct replay_rb *arr = src;
+ rigidbody *rb = &player_glide.rb;
+ v3_copy( arr[0].co, rb->co );
+ v3_copy( arr[0].w, rb->w );
+ v3_copy( arr[0].v, rb->v );
+ v4_copy( arr[0].q, rb->q );
+ rb_update_matrices( rb );
+ }
+
+ localplayer.subsystem = frame->system;
+
+ /* restore the seperated glider data if we have it */
+ if( frame->data_table[ k_replay_framedata_glider ][1] ){
+ struct replay_glider_data *inf =
+ replay_frame_data( frame, k_replay_framedata_glider );
+
+ localplayer.have_glider = inf->have_glider;
+ localplayer.glider_orphan = inf->glider_orphan;
+ player_glide.t = inf->t;
+ }
+ else {
+ localplayer.have_glider = 0;
+ localplayer.glider_orphan = 0;
+ player_glide.t = 0.0f;
+ }
+
+ memcpy( &localplayer.rb, &gs->rb, sizeof(rigidbody) );
+ memcpy( &player_glide.rb, &gs->glider_rb, sizeof(rigidbody) );
+ v3_copy( gs->angles, localplayer.angles );
+
+ v3_copy( frame->cam.pos, localplayer.cam.pos );
+ v3_copy( frame->cam.angles, localplayer.cam.angles );
+ localplayer.cam.fov = frame->cam.fov;
+
+ memcpy( &localplayer.cam_control, &gs->cam_control,
+ sizeof(struct player_cam_controller) );
+
+ /* chop end off replay */
+ frame->r = NULL;
+ player_replay.local.statehead = frame;
+ player_replay.local.head = frame;
+ player_replay.local.cursor_frame = frame;
+ player_replay.local.cursor = frame->time;
+ player_replay.replay_control = k_replay_control_scrub;
+ skaterift.activity = k_skaterift_default;
+ vg.time = frame->time;
+}
+
+static void skaterift_replay_resume(void){
+ replay_frame *prev = replay_find_recent_stateframe(&player_replay.local);
+
+ if( prev ){
+ player_replay.replay_control = k_replay_control_resume;
+ player_replay.resume_target = prev;
+ player_replay.resume_begin = player_replay.local.cursor;
+ player_replay.resume_transition = 0.0f;
+ }
+
+ gui_helper_clear();
+}
+
+static void skaterift_replay_update_helpers(void);
+
+void skaterift_replay_pre_update(void)
+{
+ if( skaterift.activity != k_skaterift_replay ) return;
+
+ bool input = player_replay.editor_mode^0x1;
+
+ if( player_replay.replay_control == k_replay_control_resume )
+ {
+ if( player_replay.local.cursor_frame == player_replay.resume_target ||
+ player_replay.local.cursor_frame == NULL )
+ {
+ skaterift_restore_frame( player_replay.resume_target );
+ }
+ else
+ {
+ vg_slewf( &player_replay.resume_transition, 1.0f,
+ vg.time_frame_delta * (1.0f/1.0f) );
+
+ if( player_replay.resume_transition >= 1.0f )
+ skaterift_restore_frame( player_replay.resume_target );
+ else {
+ f64 target = vg_lerp( player_replay.resume_begin,
+ player_replay.resume_target->time,
+ vg_smoothstepf( player_replay.resume_transition ) );
+ if( replay_seek( &player_replay.local, target ) )
+ player_replay.track_velocity = 1.0f;
+ else
+ player_replay.track_velocity = 0.0f;
+ }
+ }
+ }
+ else
+ {
+ if( input && button_down( k_srbind_replay_play ) )
+ player_replay.replay_control = k_replay_control_play;
+ if( input && button_down( k_srbind_replay_freecam ) )
+ {
+ player_replay.use_freecam ^= 0x1;
+
+ if( player_replay.use_freecam )
+ {
+ replay_get_camera( &player_replay.local,
+ &player_replay.replay_freecam );
+ }
+ skaterift_replay_update_helpers();
+ }
+
+ f32 target_speed = 0.0f;
+ if( input )
+ target_speed = axis_state( k_sraxis_replay_h ) * 5.0;
+
+ if( input && button_press( k_srbind_reset ) )
+ target_speed += -2.0;
+
+ if( fabsf(target_speed) > 0.01f )
+ player_replay.replay_control = k_replay_control_scrub;
+
+ if( player_replay.replay_control == k_replay_control_play )
+ target_speed = 1.0;
+
+ vg_slewf( &player_replay.track_velocity, target_speed,
+ 18.0f*vg.time_frame_delta );
+
+ if( fabsf( player_replay.track_velocity ) > 0.0001f )
+ {
+ f64 target = player_replay.local.cursor;
+ target += player_replay.track_velocity * vg.time_frame_delta;
+
+ if( !replay_seek( &player_replay.local, target ) )
+ player_replay.track_velocity = 0.0f;
+ }
+
+ if( input && button_down( k_srbind_mback ) )
+ {
+ if( player_replay.local.statehead )
+ skaterift_restore_frame( player_replay.local.statehead );
+ else
+ skaterift.activity = k_skaterift_default;
+ srinput.state = k_input_state_resume;
+ gui_helper_clear();
+ }
+
+ if( input )
+ {
+ if( player_replay.use_freecam )
+ {
+ freecam_preupdate();
+ }
+ else
+ {
+ if( button_down( k_srbind_replay_resume ) )
+ {
+ skaterift_replay_resume();
+ }
+ }
+ }
+ }
+}
+
+static void skaterift_replay_update_helpers(void)
+{
+ player_replay.helper_resume->greyed = player_replay.use_freecam;
+
+ vg_str freecam_text;
+ vg_strnull( &freecam_text, player_replay.helper_freecam->text,
+ GUI_HELPER_TEXT_LENGTH );
+ vg_strcat( &freecam_text,
+ player_replay.use_freecam? "Exit freecam": "Freecam" );
+}
+
+static void replay_show_helpers(void)
+{
+ gui_helper_clear();
+ vg_str text;
+
+ if( gui_new_helper( input_axis_list[k_sraxis_replay_h], &text ) )
+ vg_strcat( &text, "Scrub" );
+
+ if( (player_replay.helper_resume = gui_new_helper(
+ input_button_list[k_srbind_replay_resume], &text )) )
+ vg_strcat( &text, "Resume" );
+
+ if( gui_new_helper( input_button_list[k_srbind_replay_play], &text ))
+ vg_strcat( &text, "Playback" );
+
+ player_replay.helper_freecam = gui_new_helper(
+ input_button_list[k_srbind_replay_freecam], &text );
+
+ skaterift_replay_update_helpers();
+}
+
+void skaterift_replay_post_render(void)
+{
+#ifndef SR_ALLOW_REWIND_HUB
+ if( world_static.active_instance != k_world_purpose_client )
+ return;
+#endif
+
+ /* capture the current resume frame at the very last point */
+ if( button_down( k_srbind_reset ) )
+ {
+ if( skaterift.activity == k_skaterift_default )
+ {
+ localplayer.rewinded_since_last_gate = 1;
+ skaterift.activity = k_skaterift_replay;
+ skaterift_record_frame( &player_replay.local, 1 );
+ if( player_replay.local.head )
+ {
+ player_replay.local.cursor = player_replay.local.head->time;
+ player_replay.local.cursor_frame = player_replay.local.head;
+ }
+ player_replay.replay_control = k_replay_control_scrub;
+ replay_show_helpers();
+ }
+ }
+}
+
+void skaterift_replay_init(void)
+{
+ u32 bytes = 1024*1024*10;
+ player_replay.local.data = vg_linear_alloc( vg_mem.rtmemory, bytes );
+ player_replay.local.size = bytes;
+ replay_clear( &player_replay.local );
+}
+
+void skaterift_replay_debug_info( ui_context *ctx )
+{
+ player__debugtext( ctx, 2, "replay info" );
+ replay_buffer *replay = &player_replay.local;