X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=player_skate.c;h=87c8cba7483e9ea22e07e042b967e34189eb4309;hb=d43d7f62ff83799b6d99221d881179814cb239a6;hp=25f87248e2deb57ae0740f1775e11aefdfd8cac0;hpb=95054f3e156a1cb86d573b11516f2c65fe02679e;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/player_skate.c b/player_skate.c
index 25f8724..87c8cba 100644
--- a/player_skate.c
+++ b/player_skate.c
@@ -3,6 +3,9 @@
 
 #include "player.h"
 #include "audio.h"
+#include "vg/vg_perlin.h"
+#include "menu.h"
+#include "ent_skateshop.h"
 
 VG_STATIC void player__skate_bind( player_instance *player )
 {
@@ -11,6 +14,8 @@ VG_STATIC void player__skate_bind( player_instance *player )
    struct skeleton *sk = &av->sk;
 
    rb_update_transform( &player->rb );
+   s->anim_grind           = skeleton_get_anim( sk, "pose_grind" );
+   s->anim_grind_jump      = skeleton_get_anim( sk, "pose_grind_jump" );
    s->anim_stand           = skeleton_get_anim( sk, "pose_stand" );
    s->anim_highg           = skeleton_get_anim( sk, "pose_highg" );
    s->anim_air             = skeleton_get_anim( sk, "pose_air" );
@@ -50,7 +55,7 @@ VG_STATIC int skate_collide_smooth( player_instance *player,
                                     m4x3f mtx, rb_sphere *sphere,
                                     rb_ct *man )
 {
-   world_instance *world = get_active_world();
+   world_instance *world = world_current_instance();
 
    int len = 0;
    len = rb_sphere__scene( mtx, sphere, NULL, &world->rb_geo.inf.scene, man );
@@ -87,7 +92,7 @@ VG_STATIC int skate_grind_scansq( player_instance *player,
                                   v3f pos, v3f dir, float r,
                                   struct grind_info *inf )
 {
-   world_instance *world = get_active_world();
+   world_instance *world = world_current_instance();
 
    v4f plane;
    v3_copy( dir, plane );
@@ -97,13 +102,8 @@ VG_STATIC int skate_grind_scansq( player_instance *player,
    boxf box;
    v3_add( pos, (v3f){ r, r, r }, box[1] );
    v3_sub( pos, (v3f){ r, r, r }, box[0] );
-   
-   bh_iter it;
-   bh_iter_init( 0, &it );
-   int idx;
 
-   struct grind_sample
-   {
+   struct grind_sample{
       v2f co;
       v2f normal;
       v3f normal3,
@@ -119,18 +119,20 @@ VG_STATIC int skate_grind_scansq( player_instance *player,
    v3_cross( plane, player->basis[1], support_axis );
    v3_normalize( support_axis );
    
-   while( bh_next( world->geo_bh, &it, box, &idx ) ){
-      u32 *ptri = &world->scene_geo->arrindices[ idx*3 ];
+   bh_iter it;
+   bh_iter_init_box( 0, &it, box );
+   i32 idx;
+   
+   while( bh_next( world->geo_bh, &it, &idx ) ){
+      u32 *ptri = &world->scene_geo.arrindices[ idx*3 ];
       v3f tri[3];
 
       struct world_surface *surf = world_tri_index_surface(world,ptri[0]);
-#if 0
-      if( !(surf->info.flags & k_material_flag_skate_surface) )
+      if( !(surf->info.flags & k_material_flag_grindable) )
          continue;
-#endif
 
       for( int j=0; j<3; j++ )
-         v3_copy( world->scene_geo->arrvertices[ptri[j]].co, tri[j] );
+         v3_copy( world->scene_geo.arrvertices[ptri[j]].co, tri[j] );
 
       for( int j=0; j<3; j++ ){
          int i0 = j,
@@ -231,10 +233,8 @@ too_many_samples:
          float yi = v3_dot( player->basis[1], si->normal3 ),
                yj = v3_dot( player->basis[1], sj->normal3 );
 
-         if( yi > yj )
-            v3_add( si->normal3, average_normal, average_normal );
-         else
-            v3_add( sj->normal3, average_normal, average_normal );
+         if( yi > yj ) v3_add( si->normal3, average_normal, average_normal );
+         else          v3_add( sj->normal3, average_normal, average_normal );
 
          passed_samples ++;
       }
@@ -299,7 +299,7 @@ VG_STATIC int create_jumps_to_hit_target( player_instance *player,
    m3x3_mulv( player->invbasis, player->rb.v, v_local );
 
    v2f d = { v3_dot( ax, v0 ),           v0[1] },
-       v = { v3_dot( ax, player->rb.v ), v_local[1] };
+       v = { v3_dot( ax, v_local ), v_local[1] };
 
    float a = atan2f( v[1], v[0] ),
          m = v2_length( v ),
@@ -321,6 +321,8 @@ VG_STATIC int create_jumps_to_hit_target( player_instance *player,
          m3x3_mulv( player->basis, inf->v, inf->v );
          inf->land_dist = d[0] / (cosf(a0)*m);
          inf->gravity = gravity;
+
+         v3_copy( target, inf->log[inf->log_length ++] );
       }
 
       if( fabsf(a1-a) < max_angle_delta ){
@@ -332,52 +334,18 @@ VG_STATIC int create_jumps_to_hit_target( player_instance *player,
          m3x3_mulv( player->basis, inf->v, inf->v );
          inf->land_dist = d[0] / (cosf(a1)*m);
          inf->gravity = gravity;
+
+         v3_copy( target, inf->log[inf->log_length ++] );
       }
    }
 
    return valid_count;
 }
 
-#if 0
-VG_STATIC 
-int create_jump_for_target( world_instance *world, player_instance *player,
-                            v3f target, float max_angle, jump_info *jump )
-{
-
-      if( fabsf(a0-a) > fabsf(a1-a) )
-         a0 = a1;
-
-      if( fabsf(a0-a) > max_angle )
-         return 0;
-
-      /* TODO: sweep the path before chosing the smallest dist */
-
-
-#if 0
-      /* add a trace */
-      for( int i=0; i<=20; i++ )
-      {
-         float t = (float)i * (1.0f/20.0f) * p->land_dist;
-
-         v3f p0;
-         v3_muls( p->v, t, p0 );
-         v3_muladds( p0, player->basis[1], -0.5f * p->gravity * t*t, p0 );
-
-         v3_add( player->rb.co, p0, p->log[ p->log_length ++ ] );
-      }
-#endif
-
-      return 1;
-   }
-   else
-      return 0;
-}
-#endif
-
 VG_STATIC 
 void player__approximate_best_trajectory( player_instance *player )
 {
-   world_instance *world = get_active_world();
+   world_instance *world0 = world_current_instance();
 
    struct player_skate *s = &player->_skate;
    float k_trace_delta = k_rb_delta * 10.0f;
@@ -401,6 +369,19 @@ void player__approximate_best_trajectory( player_instance *player )
    int grind_located = 0;
    float grind_located_gravity = k_gravity;
 
+
+   v3f launch_v_bounds[2];
+
+   for( int i=0; i<2; i++ ){
+      v3_copy( player->rb.v, launch_v_bounds[i] );
+      float ang = (float[]){ angle_begin, angle_end }[ i ];
+            ang *= 0.15f;
+
+      v4f qbias;
+      q_axis_angle( qbias, axis, ang );
+      q_mulv( qbias, launch_v_bounds[i], launch_v_bounds[i] );
+   }
+
    for( int m=0;m<=30; m++ ){
       jump_info *inf = &s->possible_jumps[ s->possible_jump_count ++ ];
       reset_jump_info( inf );
@@ -409,6 +390,7 @@ void player__approximate_best_trajectory( player_instance *player )
       v3_copy( player->rb.co, launch_co );
       v3_copy( player->rb.v,  launch_v );
       v3_copy( launch_co, co0 );
+      world_instance *trace_world = world0;
 
       float vt  = (float)m * (1.0f/30.0f),
             ang = vg_lerpf( angle_begin, angle_end, vt ) * 0.15f;
@@ -423,7 +405,6 @@ void player__approximate_best_trajectory( player_instance *player )
       q_axis_angle( qbias, player->rb.to_world[1], yaw_bias );
       q_mulv( qbias, launch_v, launch_v );
 
-
       float gravity_bias = vg_lerpf( 0.85f, 1.4f, vt ),
             gravity      = k_gravity * gravity_bias;
       inf->gravity = gravity;
@@ -440,76 +421,105 @@ void player__approximate_best_trajectory( player_instance *player )
          v3_add( launch_co, co1, co1 );
 
          float launch_vy = v3_dot( launch_v,basis[1] );
-         if( !grind_located && (launch_vy - gravity*t < 0.0f) ){
-            v3f closest;
-            if( bh_closest_point( world->geo_bh, co1, closest, 1.0f ) != -1 ){
-               v3f ve;
-               v3_copy( launch_v, ve );
-               v3_muladds( ve, basis[1], -gravity * t, ve );
 
-               if( skate_grind_scansq( player, closest, ve, 0.5f, &grind ) ){
-                  /* check alignment */
-                  v2f v0 = { v3_dot( ve, basis[0] ), 
-                             v3_dot( ve, basis[2] ) },
-                      v1 = { v3_dot( grind.dir, basis[0] ), 
-                             v3_dot( grind.dir, basis[2] ) };
+         int search_for_grind = 1;
+         if( grind_located ) search_for_grind = 0;
+         if( launch_vy - gravity*t > 0.0f ) search_for_grind = 0;
 
-                  v2_normalize( v0 );
-                  v2_normalize( v1 );
+         /* REFACTOR */
 
-                  float a = v2_dot( v0, v1 );
+         v3f closest={0.0f,0.0f,0.0f};
+         if( search_for_grind ){
+            if( bh_closest_point(trace_world->geo_bh,co1,closest,1.0f) != -1 ){
+               float min_dist = 0.75f;
+                     min_dist *= min_dist;
 
-#if 0
-                  if( a >= cosf( VG_PIf * /*0.185f*/ 0.02f ) ){
-#endif
-                     grind_located = 1;
-                     grind_located_gravity = inf->gravity;
+               if( v3_dist2( closest, launch_co ) < min_dist )
+                  search_for_grind = 0;
 
-                     vg_success( "Grind located\n" );
-#if 0
-                  }
-#endif
+               v3f bound[2];
+
+               for( int j=0; j<2; j++ ){
+                  v3_muls( launch_v_bounds[j], t, bound[j] );
+                  v3_muladds( bound[j], basis[1], -0.5f*gravity*t*t, bound[j] );
+                  v3_add( launch_co, bound[j], bound[j] );
+               }
+
+               float limh = vg_minf( 2.0f, t ),
+                     minh = vg_minf( bound[0][1], bound[1][1] )-limh,
+                     maxh = vg_maxf( bound[0][1], bound[1][1] )+limh;
+
+               if( (closest[1] < minh) || (closest[1] > maxh) ){
+                  search_for_grind = 0;
+               }
+            }
+            else
+               search_for_grind = 0;
+         }
+
+         if( search_for_grind ){
+            v3f ve;
+            v3_copy( launch_v, ve );
+            v3_muladds( ve, basis[1], -gravity * t, ve );
+
+            if( skate_grind_scansq( player, closest, ve, 0.5f, &grind ) ){
+               /* check alignment */
+               v2f v0 = { v3_dot( ve, basis[0] ), 
+                          v3_dot( ve, basis[2] ) },
+                   v1 = { v3_dot( grind.dir, basis[0] ), 
+                          v3_dot( grind.dir, basis[2] ) };
+
+               v2_normalize( v0 );
+               v2_normalize( v1 );
+
+               float a = v2_dot( v0, v1 );
+
+               float a_min = cosf( VG_PIf * 0.185f );
+               if( s->grind_cooldown )
+                  a_min = cosf( VG_PIf * 0.05f );
+
+               /* check speed */
+               if( (fabsf(v3_dot( ve, grind.dir ))>=k_grind_axel_min_vel) &&
+                   (a >= a_min) && 
+                   (fabsf(grind.dir[1]) < 0.70710678118654752f))
+               {
+                  grind_located = 1;
+                  grind_located_gravity = inf->gravity;
                }
             }
          }
 
-         if( world->rendering_gate ){
-            ent_gate *gate = world->rendering_gate;
+         if( trace_world->rendering_gate ){
+            ent_gate *gate = trace_world->rendering_gate;
             if( gate_intersect( gate, co1, co0 ) ){
                m4x3_mulv( gate->transport, co0, co0 );
                m4x3_mulv( gate->transport, co1, co1 );
                m3x3_mulv( gate->transport, launch_v, launch_v);
                m4x3_mulv( gate->transport, launch_co, launch_co );
                m3x3_mul( gate->transport, basis, basis );
+
+               if( gate->type == k_gate_type_nonlocel ){
+                  trace_world = &world_static.worlds[ gate->target ];
+               }
             }
          }
 
          float t1;
          v3f n;
 
-         int idx = spherecast_world( world, co0, co1, k_board_radius, &t1, n );
+         float scan_radius = k_board_radius;
+               scan_radius *= vg_clampf( t, 0.02f, 1.0f );
+
+         int idx = spherecast_world(trace_world, co0, co1, scan_radius, &t1, n);
          if( idx != -1 ){
             v3f co;
             v3_lerp( co0, co1, t1, co );
             v3_copy( co, inf->log[ inf->log_length ++ ] ); 
 
             v3_copy( n, inf->n );
-            u32 *tri = &world->scene_geo->arrindices[ idx*3 ];
-            struct world_surface *surf = world_tri_index_surface(world, tri[0]);
-
-#if 0
-            v3f v0, v1;
-            v3f pa, pb, pc;
-
-            v3_copy( world->scene_geo->arrvertices[tri[0]].co, pa );
-            v3_copy( world->scene_geo->arrvertices[tri[1]].co, pb );
-            v3_copy( world->scene_geo->arrvertices[tri[2]].co, pc );
-
-            v3_sub( pb, pa, v0 );
-            v3_sub( pc, pa, v1 );
-            v3_cross( v0, v1, inf->n );
-            v3_normalize( inf->n );
-#endif
+            u32 *tri = &trace_world->scene_geo.arrindices[ idx*3 ];
+            struct world_surface *surf = 
+               world_tri_index_surface( trace_world, tri[0] );
 
             inf->type = k_prediction_land;
 
@@ -520,11 +530,13 @@ void player__approximate_best_trajectory( player_instance *player )
             inf->score = -v3_dot( ve, inf->n );
             inf->land_dist = t + k_trace_delta * t1;
 
-            
             /* Bias prediction towords ramps */
-            if( !(surf->info.flags & k_material_flag_skate_surface) )
+            if( !(surf->info.flags & k_material_flag_skate_target) )
                inf->score *= 10.0f;
 
+            if( surf->info.flags & k_material_flag_boundary )
+               s->possible_jump_count --;
+
             break;
          }
          
@@ -543,7 +555,15 @@ void player__approximate_best_trajectory( player_instance *player )
       
       int valid_count = 
          create_jumps_to_hit_target( player, grind_jumps, grind.co, 
-                                     0.25f*VG_PIf, grind_located_gravity );
+                                     0.175f*VG_PIf, grind_located_gravity );
+
+      /* knock out original landing points in the 1m area */
+      for( u32 j=0; j<s->possible_jump_count; j++ ){
+         jump_info *jump = &s->possible_jumps[ j ];
+         float dist = v3_dist2( jump->log[jump->log_length-1], grind.co );
+         float descale = 1.0f-vg_minf(1.0f,dist);
+         jump->score += descale*3.0f;
+      }
 
       for( int i=0; i<valid_count; i++ ){
          jump_info *jump = &grind_jumps[i];
@@ -576,8 +596,8 @@ void player__approximate_best_trajectory( player_instance *player )
             float t1;
             v3f n;
 
-            int idx = spherecast_world( world, co0,co1,
-                                        k_board_radius*0.5f, &t1, n);
+            int idx = spherecast_world( world0, co0,co1,
+                                        k_board_radius*0.1f, &t1, n);
             if( idx != -1 ){
                goto invalidated_grind;
             }
@@ -640,11 +660,16 @@ invalidated_grind:;
       v3_copy( best->v, player->rb.v );
       s->land_dist = best->land_dist;
 
-      v2f steer = { player->input_js1h->axis.value,
-                    player->input_js1v->axis.value };
-      v2_normalize_clamp( steer );
       s->state.gravity_bias = best->gravity;
 
+      if( best->type == k_prediction_grind ){
+         s->state.activity = k_skate_activity_air_to_grind;
+      }
+
+      v2f steer;
+      joystick_state( k_srjoystick_steer, steer );
+      v2_normalize_clamp( steer );
+
       if( (fabsf(steer[1]) > 0.5f) && (s->land_dist >= 1.5f) ){
          s->state.flip_rate = (1.0f/s->land_dist) * vg_signf(steer[1]) *
                                  s->state.reverse ;
@@ -674,7 +699,7 @@ VG_STATIC void skate_apply_air_model( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
-   if( s->state.activity_prev != k_skate_activity_air )
+   if( s->state.activity_prev > k_skate_activity_air_to_grind )
       player__approximate_best_trajectory( player );
 
    float angle = v3_dot( player->rb.to_world[1], s->land_normal );
@@ -686,10 +711,6 @@ VG_STATIC void skate_apply_air_model( player_instance *player )
    q_axis_angle( correction, axis, 
                   acosf(angle)*2.0f*VG_TIMESTEP_FIXED );
    q_mul( correction, player->rb.q, player->rb.q );
-
-   v2f steer = { player->input_js1h->axis.value,
-                 player->input_js1v->axis.value };
-   v2_normalize_clamp( steer );
 }
 
 VG_STATIC int player_skate_trick_input( player_instance *player );
@@ -710,7 +731,7 @@ VG_STATIC void skate_apply_trick_model( player_instance *player )
    v3_muladds( s->board_trick_residuald, s->board_trick_residualv,
                k_rb_delta, s->board_trick_residuald );
 
-   if( s->state.activity == k_skate_activity_air ){
+   if( s->state.activity <= k_skate_activity_air_to_grind ){
       if( v3_length2( s->state.trick_vel ) < 0.0001f )
          return;
 
@@ -767,7 +788,7 @@ VG_STATIC void skate_apply_grab_model( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
-   float grabt = player->input_grab->axis.value;
+   float grabt = axis_state( k_sraxis_grab );
 
    if( grabt > 0.5f ){
       v2_muladds( s->state.grab_mouse_delta, vg.mouse_delta, 0.02f, 
@@ -785,9 +806,12 @@ VG_STATIC void skate_apply_steering_model( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
+   v2f jsteer;
+   joystick_state( k_srjoystick_steer, jsteer );
+
    /* Steering */
-   float steer = player->input_js1h->axis.value,
-         grab  = player->input_grab->axis.value;
+   float steer = jsteer[0],
+         grab  = axis_state( k_sraxis_grab );
 
    steer = vg_signf( steer ) * steer*steer * k_steer_ground;
 
@@ -797,7 +821,7 @@ VG_STATIC void skate_apply_steering_model( player_instance *player )
    float rate = 26.0f,
          top  = 1.0f;
 
-   if( s->state.activity == k_skate_activity_air ){
+   if( s->state.activity <= k_skate_activity_air_to_grind ){
       rate = 6.0f * fabsf(steer);
       top  = 1.5f;
    }
@@ -866,9 +890,8 @@ VG_STATIC void skate_apply_friction_model( player_instance *player )
 
    /* Pushing additive force */
 
-   if( !player->input_jump->button.value ){
-      if( player->input_push->button.value || 
-          (vg.time-s->state.start_push<0.75) )
+   if( !button_press( k_srbind_jump ) ){
+      if( button_press( k_srbind_push ) || (vg.time-s->state.start_push<0.75) )
       {
          if( (vg.time - s->state.cur_push) > 0.25 )
             s->state.start_push = vg.time;
@@ -896,10 +919,10 @@ VG_STATIC void skate_apply_jump_model( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
    int charging_jump_prev = s->state.charging_jump;
-   s->state.charging_jump = player->input_jump->button.value;
+   s->state.charging_jump = button_press( k_srbind_jump );
 
    /* Cannot charge this in air */
-   if( s->state.activity == k_skate_activity_air ){
+   if( s->state.activity <= k_skate_activity_air_to_grind ){
       s->state.charging_jump = 0;
       return;
    }
@@ -933,28 +956,28 @@ VG_STATIC void skate_apply_jump_model( player_instance *player )
          v3_normalize( jumpdir );
       }else{
          v3_copy( s->state.up_dir, jumpdir );
+         s->grind_cooldown = 30;
+         s->state.activity = k_skate_activity_ground;
+
+         v2f steer;
+         joystick_state( k_srjoystick_steer, steer );
+
+         float tilt  = steer[0] * 0.3f;
+               tilt *= vg_signf(v3_dot( player->rb.v, s->grind_dir ));
+
+         v4f qtilt;
+         q_axis_angle( qtilt, s->grind_dir, tilt );
+         q_mulv( qtilt, jumpdir, jumpdir );
       }
+      s->surface_cooldown = 10;
       
       float force = k_jump_force*s->state.jump_charge;
       v3_muladds( player->rb.v, jumpdir, force, player->rb.v );
       s->state.jump_charge = 0.0f;
       s->state.jump_time = vg.time;
-      s->state.activity = k_skate_activity_air;
-
-      v2f steer = { player->input_js1h->axis.value,
-                    player->input_js1v->axis.value };
-      v2_normalize_clamp( steer );
-      skate_apply_air_model( player );
-
-#if 0
-      float maxspin = k_steer_air * k_rb_delta * k_spin_boost;
-      s->state.steery_s = -steer[0] * maxspin;
-      s->state.steerx = s->state.steerx_s;
-      s->state.lift_frames ++;
-#endif
 
       audio_lock();
-      audio_oneshot_3d( &audio_jumps[rand()%2], player->rb.co, 40.0f, 1.0f );
+      audio_oneshot_3d( &audio_jumps[vg_randu32()%2], player->rb.co, 40.0f, 1.0f );
       audio_unlock();
    }
 }
@@ -969,10 +992,8 @@ VG_STATIC void skate_apply_pump_model( player_instance *player )
    }
 
    /* Throw / collect routine 
-    *
-    * TODO: Max speed boost
     */
-   if( player->input_grab->axis.value > 0.5f ){
+   if( axis_state( k_sraxis_grab ) > 0.5f ){
       if( s->state.activity == k_skate_activity_ground ){
          /* Throw */
          v3_muls( player->rb.to_world[1], k_mmthrow_scale, s->state.throw_v );
@@ -986,7 +1007,8 @@ VG_STATIC void skate_apply_pump_model( player_instance *player )
       v3_muladds( s->state.throw_v, player->rb.to_world[1], -doty, Fl);
 
       if( s->state.activity == k_skate_activity_ground ){
-         v3_muladds( player->rb.v,     Fl,  k_mmcollect_lat, player->rb.v );
+         if( v3_length2(player->rb.v)<(20.0f*20.0f) )
+            v3_muladds( player->rb.v,     Fl,  k_mmcollect_lat, player->rb.v );
          v3_muladds( s->state.throw_v, Fl, -k_mmcollect_lat, s->state.throw_v );
       }
 
@@ -1015,8 +1037,8 @@ VG_STATIC void skate_apply_cog_model( player_instance *player )
    v3_copy( s->state.up_dir, ideal_dir );
    v3_normalize( ideal_dir );
 
-   v3_muladds( player->rb.co, ideal_dir,
-               1.0f-player->input_grab->axis.value, ideal_cog );
+   float grab = axis_state( k_sraxis_grab );
+   v3_muladds( player->rb.co, ideal_dir, 1.0f-grab, ideal_cog );
    v3_sub( ideal_cog, s->state.cog, ideal_diff );
 
    /* Apply velocities */
@@ -1043,17 +1065,23 @@ VG_STATIC void skate_integrate( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
-   float decay_rate = 1.0f - (k_rb_delta * 3.0f),
+   float decay_rate_x = 1.0f - (k_rb_delta * 3.0f),
+         decay_rate_z = decay_rate_x,
          decay_rate_y = 1.0f;
 
    if( s->state.activity >= k_skate_activity_grind_any ){
+#if 0
       decay_rate = 1.0f-vg_lerpf( 3.0f, 20.0f, s->grind_strength ) * k_rb_delta;
       decay_rate_y = decay_rate;
+#endif
+      decay_rate_x = 1.0f-(16.0f*k_rb_delta);
+      decay_rate_y = 1.0f-(10.0f*k_rb_delta);
+      decay_rate_z = 1.0f-(40.0f*k_rb_delta);
    }
 
-   float wx = v3_dot( player->rb.w, player->rb.to_world[0] ) * decay_rate,
+   float wx = v3_dot( player->rb.w, player->rb.to_world[0] ) * decay_rate_x,
          wy = v3_dot( player->rb.w, player->rb.to_world[1] ) * decay_rate_y,
-         wz = v3_dot( player->rb.w, player->rb.to_world[2] ) * decay_rate;
+         wz = v3_dot( player->rb.w, player->rb.to_world[2] ) * decay_rate_z;
 
    v3_muls(                  player->rb.to_world[0], wx, player->rb.w );
    v3_muladds( player->rb.w, player->rb.to_world[1], wy, player->rb.w );
@@ -1067,43 +1095,42 @@ VG_STATIC void skate_integrate( player_instance *player )
  * 1 2 or 3
  */
 
+VG_STATIC void skate_copy_holdout( player_instance *player )
+{
+   struct player_skate *s = &player->_skate;
+   struct player_avatar *av = player->playeravatar;
+   struct skeleton *sk = &av->sk;
+   skeleton_copy_pose( sk, s->holdout, player->holdout_pose );
+}
+
 VG_STATIC int player_skate_trick_input( player_instance *player )
 {
-   return (player->input_trick0->button.value) |
-          (player->input_trick1->button.value << 1) |
-          (player->input_trick2->button.value << 1) |
-          (player->input_trick2->button.value);
+   return (button_press( k_srbind_trick0 )     ) |
+          (button_press( k_srbind_trick1 ) << 1) |
+          (button_press( k_srbind_trick2 ) << 1) |
+          (button_press( k_srbind_trick2 )     );
 }
 
 VG_STATIC void player__skate_pre_update( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
-   if( vg_input_button_down( player->input_use ) ){
+   if( button_down( k_srbind_use ) ){
       player->subsystem = k_player_subsystem_walk;
 
       v3f angles;
       v3_copy( player->cam.angles, angles );
       angles[2] = 0.0f;
 
-      player->holdout_time = 0.25f;
+      skate_copy_holdout( player );
+      player->holdout_time = 0.34f;
       player__skate_kill_audio( player );
       player__walk_transition( player, angles );
       return;
    }
 
-   if( vg_input_button_down( player->input_reset ) ){
-      player->rb.co[1] += 2.0f;
-      s->state.cog[1] += 2.0f;
-      q_axis_angle( player->rb.q, (v3f){1.0f,0.0f,0.0f}, VG_PIf * 0.25f );
-      v3_zero( player->rb.w );
-      v3_zero( player->rb.v );
-
-      rb_update_transform( &player->rb );
-   }
-
    int trick_id; 
-   if( (s->state.activity == k_skate_activity_air) && 
+   if( (s->state.activity <= k_skate_activity_air_to_grind) && 
        (trick_id = player_skate_trick_input( player )) )
    {
       if( (vg.time - s->state.jump_time) < 0.1f ){
@@ -1130,6 +1157,10 @@ VG_STATIC void player__skate_post_update( player_instance *player )
 
    for( int i=0; i<s->possible_jump_count; i++ ){
       jump_info *jump = &s->possible_jumps[i];
+
+      if( jump->log_length == 0 ){
+         vg_fatal_error( "assert: jump->log_length == 0\n" );
+      }
       
       for( int j=0; j<jump->log_length - 1; j ++ ){
          float brightness = jump->score*jump->score*jump->score;
@@ -1147,50 +1178,107 @@ VG_STATIC void player__skate_post_update( player_instance *player )
       vg_line_pt3( jump->apex, 0.02f, 0xffffffff );
    }
 
-#if 0
-   vg_line_pt3( s->state.apex, 0.030f, 0xff0000ff );
-#endif
-
    audio_lock();
 
-   float air   = s->state.activity == k_skate_activity_air? 1.0f: 0.0f,
+   float air   = s->state.activity <= k_skate_activity_air_to_grind? 1.0f: 0.0f,
          speed = v3_length( player->rb.v ),
          attn  = vg_minf( 1.0f, speed*0.1f ),
-         slide = vg_clampf( fabsf(s->state.slip), 0.0f, 1.0f ),
+         slide = vg_clampf( fabsf(s->state.slip), 0.0f, 1.0f );
+
+   if( s->state.activity >= k_skate_activity_grind_any ){
+      slide = 0.0f;
+   }
 
-         vol_main    = sqrtf( (1.0f-air)*attn*(1.0f-slide) * 0.4f ),
-         vol_air     = sqrtf(       air *attn * 0.5f ),
-         vol_slide   = sqrtf( (1.0f-air)*attn*slide * 0.25f );
+   f32 gate        = 1.0f-menu.factive,
+       vol_main    = sqrtf( (1.0f-air)*attn*(1.0f-slide) * 0.4f ) * gate,
+       vol_air     = sqrtf(       air *attn * 0.5f )              * gate,
+       vol_slide   = sqrtf( (1.0f-air)*attn*slide * 0.25f )       * gate;
 
    const u32 flags = AUDIO_FLAG_SPACIAL_3D|AUDIO_FLAG_LOOP;
-   if( !s->aud_main )
-      s->aud_main = audio_request_channel( &audio_board[0], flags );
 
-   if( !s->aud_air )
-      s->aud_air = audio_request_channel( &audio_board[1], flags );
+   if( !s->aud_air ){
+      s->aud_air = audio_get_first_idle_channel();
+      if( s->aud_air )
+         audio_channel_init( s->aud_air, &audio_board[1], flags );
+   }
 
-   if( !s->aud_slide )
-      s->aud_slide = audio_request_channel( &audio_board[2], flags );
+   if( !s->aud_slide ){
+      s->aud_slide = audio_get_first_idle_channel();
+      if( s->aud_slide ) 
+         audio_channel_init( s->aud_slide, &audio_board[2], flags );
+   }
 
 
    /* brrrrrrrrrrrt sound for tiles and stuff 
     * --------------------------------------------------------*/
    float sidechain_amt = 0.0f,
-         hz            = speed * 2.0f;
+         hz            = vg_maxf( speed * 2.0f, 2.0f );
 
-   if( s->surface == k_surface_prop_tiles )
+   if( (s->surface == k_surface_prop_tiles) &&
+       (s->state.activity < k_skate_activity_grind_any) )
       sidechain_amt = 1.0f;
    else
       sidechain_amt = 0.0f;
 
    audio_set_lfo_frequency( 0, hz );
    audio_set_lfo_wave( 0, k_lfo_polynomial_bipolar, 
-                        vg_lerpf( 250.0f, 80.0f, attn ) );
+                          vg_lerpf( 250.0f, 80.0f, attn ) );
+
+   if( s->sample_change_cooldown > 0.0f ){
+      s->sample_change_cooldown -= vg.time_frame_delta;
+   }
+   else{
+      int sample_type = k_skate_sample_concrete;
+
+      if( s->state.activity == k_skate_activity_grind_5050 ){
+         if( s->surface == k_surface_prop_metal )
+            sample_type = k_skate_sample_metal_scrape_generic;
+         else
+            sample_type = k_skate_sample_concrete_scrape_metal;
+      }
+      else if( (s->state.activity == k_skate_activity_grind_back50) ||
+               (s->state.activity == k_skate_activity_grind_front50) )
+      {
+         if( s->surface == k_surface_prop_metal ){
+            sample_type = k_skate_sample_metal_scrape_generic;
+         }
+         else{
+            float a = v3_dot( player->rb.to_world[2], s->grind_dir );
+            if( fabsf(a) > 0.70710678118654752f )
+               sample_type = k_skate_sample_concrete_scrape_wood;
+            else 
+               sample_type = k_skate_sample_concrete_scrape_metal;
+         }
+      }
+      else if( s->state.activity == k_skate_activity_grind_boardslide ){
+         if( s->surface == k_surface_prop_metal )
+            sample_type = k_skate_sample_metal_scrape_generic;
+         else
+            sample_type = k_skate_sample_concrete_scrape_wood;
+      }
+
+      audio_clip *relevant_samples[] = {
+         &audio_board[0],
+         &audio_board[0],
+         &audio_board[7],
+         &audio_board[6],
+         &audio_board[5]
+      };
+
+      if( (s->main_sample_type != sample_type) || (!s->aud_main) ){
+         s->aud_main = 
+            audio_channel_crossfade( s->aud_main, relevant_samples[sample_type],
+                                     0.06f, flags );
+         s->sample_change_cooldown = 0.1f;
+         s->main_sample_type = sample_type;
+      }
+   }
 
    if( s->aud_main ){
       s->aud_main->colour = 0x00103efe;
       audio_channel_set_spacial( s->aud_main, player->rb.co, 40.0f );
-      audio_channel_slope_volume( s->aud_main, 0.05f, vol_main );
+      //audio_channel_slope_volume( s->aud_main, 0.05f, vol_main );
+      audio_channel_edit_volume( s->aud_main, vol_main, 1 );
       audio_channel_sidechain_lfo( s->aud_main, 0, sidechain_amt );
 
       float rate = 1.0f + (attn-0.5f)*0.2f;
@@ -1200,14 +1288,16 @@ VG_STATIC void player__skate_post_update( player_instance *player )
    if( s->aud_slide ){
       s->aud_slide->colour = 0x00103efe;
       audio_channel_set_spacial( s->aud_slide, player->rb.co, 40.0f );
-      audio_channel_slope_volume( s->aud_slide, 0.05f, vol_slide );
+      //audio_channel_slope_volume( s->aud_slide, 0.05f, vol_slide );
+      audio_channel_edit_volume( s->aud_slide, vol_slide, 1 );
       audio_channel_sidechain_lfo( s->aud_slide, 0, sidechain_amt );
    }
 
    if( s->aud_air ){
       s->aud_air->colour = 0x00103efe;
       audio_channel_set_spacial( s->aud_air, player->rb.co, 40.0f );
-      audio_channel_slope_volume( s->aud_air, 0.05f, vol_air );
+      //audio_channel_slope_volume( s->aud_air, 0.05f, vol_air );
+      audio_channel_edit_volume( s->aud_air, vol_air, 1 );
    }
 
    audio_unlock();
@@ -1227,7 +1317,7 @@ int skate_compute_surface_alignment( player_instance *player,
                                      v3f surface_normal, v3f axel_dir )
 {
    struct player_skate *s = &player->_skate;
-   world_instance *world = get_active_world();
+   world_instance *world = world_current_instance();
 
    v3f truck, left, right;
    m4x3_mulv( player->rb.to_world, ra, truck );
@@ -1307,11 +1397,11 @@ int skate_compute_surface_alignment( player_instance *player,
 
       if( idx != -1 )
       {
-         u32 *tri = &world->scene_geo->arrindices[ idx * 3 ];
+         u32 *tri = &world->scene_geo.arrindices[ idx * 3 ];
          v3f verts[3];
 
          for( int j=0; j<3; j++ )
-            v3_copy( world->scene_geo->arrvertices[ tri[j] ].co, verts[j] );
+            v3_copy( world->scene_geo.arrvertices[ tri[j] ].co, verts[j] );
 
          v3f vert0, vert1, n;
          v3_sub( verts[1], verts[0], vert0 );
@@ -1354,14 +1444,16 @@ VG_STATIC void skate_weight_distribute( player_instance *player )
 
    int reverse_dir = v3_dot( player->rb.to_world[2], player->rb.v ) < 0.0f?1:-1;
 
+   v2f steer;
+   joystick_state( k_srjoystick_steer, steer );
+
    if( s->state.manual_direction == 0 ){
-      if( (player->input_js1v->axis.value > 0.7f) && 
-          (s->state.activity == k_skate_activity_ground) &&
+      if( (steer[1] > 0.7f) && (s->state.activity == k_skate_activity_ground) &&
           (s->state.jump_charge <= 0.01f) )
          s->state.manual_direction = reverse_dir;
    }
    else{
-      if( player->input_js1v->axis.value < 0.1f ){
+      if( steer[1] < 0.1f ){
          s->state.manual_direction = 0;
       }
       else{
@@ -1372,13 +1464,11 @@ VG_STATIC void skate_weight_distribute( player_instance *player )
    }
 
    if( s->state.manual_direction ){
-      float amt = vg_minf( player->input_js1v->axis.value * 8.0f, 1.0f );
+      float amt = vg_minf( steer[1] * 8.0f, 1.0f );
       s->weight_distribution[2] = k_board_length * amt * 
                                           (float)s->state.manual_direction;
    }
 
-   /* TODO: Fall back on land normal */
-   /* TODO: Lerp weight distribution */
    if( s->state.manual_direction ){
       v3f plane_z;
 
@@ -1420,13 +1510,11 @@ VG_STATIC void skate_adjust_up_direction( player_instance *player )
       v3_lerp( s->state.up_dir, target,
                8.0f * s->substep_delta, s->state.up_dir );
    }
-   else if( s->state.activity == k_skate_activity_air )
-   {
+   else if( s->state.activity <= k_skate_activity_air_to_grind ){
       v3_lerp( s->state.up_dir, player->rb.to_world[1],
                8.0f * s->substep_delta, s->state.up_dir );
    }
-   else
-   {
+   else{
       v3_lerp( s->state.up_dir, player->basis[1],
                12.0f * s->substep_delta, s->state.up_dir );
    }
@@ -1442,7 +1530,7 @@ VG_STATIC int skate_point_visible( v3f origin, v3f target )
    v3_muls( dir, 1.0f/ray.dist, dir );
    ray.dist -= 0.025f;
 
-   if( ray_world( get_active_world(), origin, dir, &ray ) )
+   if( ray_world( world_current_instance(), origin, dir, &ray ) )
       return 0;
 
    return 1;
@@ -1450,7 +1538,6 @@ VG_STATIC int skate_point_visible( v3f origin, v3f target )
 
 VG_STATIC void skate_grind_orient( struct grind_info *inf, m3x3f mtx )
 {
-   /* TODO: Is N and Dir really orthogonal? */
    v3_copy( inf->dir, mtx[0] );
    v3_copy( inf->n, mtx[1] );
    v3_cross( mtx[0], mtx[1], mtx[2] );
@@ -1491,7 +1578,7 @@ VG_STATIC void skate_grind_truck_apply( player_instance *player,
 {
    struct player_skate *s = &player->_skate;
 
-   /* TODO: Trash compactor this */
+   /* REFACTOR */
    v3f ra = { 0.0f, -k_board_radius, sign * k_board_length };
    v3f raw, wsp;
    m3x3_mulv( player->rb.to_world, ra, raw );
@@ -1530,9 +1617,10 @@ VG_STATIC void skate_grind_truck_apply( player_instance *player,
    v3_normalize( target_fwd );
    v3_normalize( fwd );
 
+   v2f steer;
+   joystick_state( k_srjoystick_steer, steer );
 
-   float way = player->input_js1v->axis.value *
-                  vg_signf( v3_dot( raw_nplane, player->rb.v ) );
+   float way = steer[1] * vg_signf( v3_dot( raw_nplane, player->rb.v ) );
 
    v4f q;
    q_axis_angle( q, axis, VG_PIf*0.125f * way );
@@ -1575,6 +1663,10 @@ VG_STATIC void skate_5050_apply( player_instance *player,
    v3_muladds( inf_back->co, inf_avg.dir, 0.5f, inf_avg.co );
    v3_normalize( inf_avg.dir );
 
+   /* dont ask */
+   v3_muls( inf_avg.dir, vg_signf(v3_dot(inf_avg.dir,player->rb.v)), 
+            inf_avg.dir );
+
    v3f axis_front, axis_back, axis;
    v3_cross( inf_front->dir, inf_front->n, axis_front );
    v3_cross( inf_back->dir,  inf_back->n,  axis_back  );
@@ -1582,11 +1674,12 @@ VG_STATIC void skate_5050_apply( player_instance *player,
    v3_normalize( axis );
 
    v3_cross( axis, inf_avg.dir, inf_avg.n );
-   
    skate_grind_decay( player, &inf_avg, 1.0f );
 
+   v2f steer;
+   joystick_state( k_srjoystick_steer, steer );
 
-   float way = player->input_js1v->axis.value *
+   float way = steer[1] *
                   vg_signf( v3_dot( player->rb.to_world[2], player->rb.v ) );
    v4f q;
    v3f up, target_up;
@@ -1602,6 +1695,8 @@ VG_STATIC void skate_5050_apply( player_instance *player,
                                     k_grind_spring, 
                                     k_grind_dampener,
                                     k_rb_delta );
+   vg_line_arrow( player->rb.co, up, 1.0f, VG__GREEN );
+   vg_line_arrow( player->rb.co, target_up, 1.0f, VG__GREEN );
 
    v3f fwd_nplane, dir_nplane;
    v3_muladds( player->rb.to_world[2], inf_avg.n,
@@ -1618,6 +1713,8 @@ VG_STATIC void skate_5050_apply( player_instance *player,
                                     1000.0f,
                                     k_grind_dampener,
                                     k_rb_delta );
+   vg_line_arrow( player->rb.co, fwd_nplane, 0.8f, VG__RED );
+   vg_line_arrow( player->rb.co, dir_nplane, 0.8f, VG__RED );
 
    v3f pos_front = { 0.0f, -k_board_radius, -1.0f * k_board_length },
        pos_back  = { 0.0f, -k_board_radius,  1.0f * k_board_length },
@@ -1679,7 +1776,7 @@ VG_STATIC int skate_grind_truck_entry( player_instance *player, float sign,
 {
    struct player_skate *s = &player->_skate;
 
-   /* TODO: Trash compactor this */
+   /* REFACTOR */
    v3f ra = { 0.0f, -k_board_radius, sign * k_board_length };
 
    v3f raw, wsp;
@@ -1750,7 +1847,7 @@ VG_STATIC void skate_boardslide_apply( player_instance *player,
                intersection );
    v3_copy( intersection, s->weight_distribution );
 
-   skate_grind_decay( player, inf, 0.1f );
+   skate_grind_decay( player, inf, 0.0125f );
    skate_grind_friction( player, inf, 0.25f );
 
    /* direction alignment */
@@ -1762,6 +1859,10 @@ VG_STATIC void skate_boardslide_apply( player_instance *player,
    m3x3_mulv( player->rb.to_world, dir, dir );
    m3x3_mulv( player->rb.to_world, perp, perp );
 
+   v4f qbalance;
+   q_axis_angle( qbalance, dir, local_co[0]*k_grind_balance );
+   q_mulv( qbalance, perp, perp );
+
    rb_effect_spring_target_vector( &player->rb, player->rb.to_world[0],
                                     dir, 
                                     k_grind_spring, k_grind_dampener,
@@ -1793,7 +1894,7 @@ VG_STATIC int skate_boardslide_entry( player_instance *player,
 
       if( (fabsf(local_co[2]) <= k_board_length) &&   /* within wood area */
           (local_co[1] >= 0.0f) &&                    /* at deck level */
-          (fabsf(local_dir[0]) >= 0.5f) )             /* perpendicular to us */
+          (fabsf(local_dir[0]) >= 0.25f) )            /* perpendicular to us */
       {
          if( fabsf(v3_dot( player->rb.v, inf->dir )) < k_grind_axel_min_vel )
             return 0;
@@ -1821,8 +1922,7 @@ VG_STATIC int skate_boardslide_renew( player_instance *player,
    if( !skate_point_visible( vis, inf->co ) )
       return 0;
 
-   /* Exit condition: minimum velocity not reached, but allow a bit of error 
-    * TODO: trash compactor */
+   /* Exit condition: minimum velocity not reached, but allow a bit of error */
    float dv   = fabsf(v3_dot( player->rb.v, inf->dir )),
          minv = k_grind_axel_min_vel*0.8f;
 
@@ -1856,10 +1956,13 @@ VG_STATIC enum skate_activity skate_availible_grind( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
+   if( s->grind_cooldown > 100 ){
+      vg_fatal_error( "wth!\n" );
+   }
+
    /* debounces this state manager a little bit */
-   if( s->frames_since_activity_change < 10 )
-   {
-      s->frames_since_activity_change ++;
+   if( s->grind_cooldown ){
+      s->grind_cooldown --;
       return k_skate_activity_undefined;
    }
 
@@ -1871,34 +1974,61 @@ VG_STATIC enum skate_activity skate_availible_grind( player_instance *player )
        res_front50 = 0,
        res_slide   = 0;
 
-   if( s->state.activity == k_skate_activity_grind_boardslide )
+   int allow_back  = 1,
+       allow_front = 1;
+
+   v2f steer;
+   joystick_state( k_srjoystick_steer, steer );
+
+   if( s->state.activity == k_skate_activity_grind_5050 || 
+       s->state.activity == k_skate_activity_grind_back50 ||
+       s->state.activity == k_skate_activity_grind_front50 )
    {
+      float tilt = steer[1];
+
+      if( fabsf(tilt) >= 0.25f ){
+         v3f raw = {0.0f,0.0f,tilt};
+         m3x3_mulv( player->rb.to_world, raw, raw );
+
+         float way = tilt * vg_signf( v3_dot( raw, player->rb.v ) );
+
+         if( way < 0.0f ) allow_front = 0;
+         else allow_back = 0;
+      }
+   }
+
+   if( s->state.activity == k_skate_activity_grind_boardslide ){
       res_slide = skate_boardslide_renew( player, &inf_slide );
    }
-   else if( s->state.activity == k_skate_activity_grind_back50 )
-   {
+   else if( s->state.activity == k_skate_activity_grind_back50 ){
       res_back50  = skate_grind_truck_renew( player,  1.0f, &inf_back50 );
-      res_front50 = skate_grind_truck_entry( player, -1.0f, &inf_front50 );
+
+      if( allow_front )
+         res_front50 = skate_grind_truck_entry( player, -1.0f, &inf_front50 );
    }
-   else if( s->state.activity == k_skate_activity_grind_front50 )
-   {
+   else if( s->state.activity == k_skate_activity_grind_front50 ){
       res_front50 = skate_grind_truck_renew( player, -1.0f, &inf_front50 );
-      res_back50  = skate_grind_truck_entry( player,  1.0f, &inf_back50 );
+
+      if( allow_back )
+         res_back50  = skate_grind_truck_entry( player,  1.0f, &inf_back50 );
    }
-   else if( s->state.activity == k_skate_activity_grind_5050 )
-   {
-      res_front50 = skate_grind_truck_renew( player, -1.0f, &inf_front50 );
-      res_back50  = skate_grind_truck_entry( player,  1.0f, &inf_back50 );
+   else if( s->state.activity == k_skate_activity_grind_5050 ){
+      if( allow_front )
+         res_front50 = skate_grind_truck_renew( player, -1.0f, &inf_front50 );
+      if( allow_back )
+         res_back50  = skate_grind_truck_renew( player,  1.0f, &inf_back50 );
    }
-   else
-   {
+   else{
       res_slide   = skate_boardslide_entry( player, &inf_slide );
-      res_back50  = skate_grind_truck_entry( player,  1.0f, &inf_back50 );
-      res_front50 = skate_grind_truck_entry( player, -1.0f, &inf_front50 );
 
-      if( res_back50 != res_front50 )
-      {
-         int wants_to_do_that = fabsf(player->input_js1v->axis.value) >= 0.25f;
+      if( allow_back )
+         res_back50  = skate_grind_truck_entry( player,  1.0f, &inf_back50 );
+
+      if( allow_front )
+         res_front50 = skate_grind_truck_entry( player, -1.0f, &inf_front50 );
+
+      if( res_back50 != res_front50 ){
+         int wants_to_do_that = fabsf(steer[1]) >= 0.25f;
 
          res_back50  &= wants_to_do_that;
          res_front50 &= wants_to_do_that;
@@ -1920,24 +2050,22 @@ VG_STATIC enum skate_activity skate_availible_grind( player_instance *player )
    }
    , new_activity = table[ res_slide << 2 | res_back50 << 1 | res_front50 ];
 
-   if(      new_activity == k_skate_activity_undefined )
-   {
-      if( s->state.activity >= k_skate_activity_grind_any )
-         s->frames_since_activity_change = 0;
+   if(      new_activity == k_skate_activity_undefined ){
+      if( s->state.activity >= k_skate_activity_grind_any ){
+         s->grind_cooldown = 15;
+         s->surface_cooldown = 10;
+      }
    }
-   else if( new_activity == k_skate_activity_grind_boardslide )
-   {
+   else if( new_activity == k_skate_activity_grind_boardslide ){
       skate_boardslide_apply( player, &inf_slide );
    }
-   else if( new_activity == k_skate_activity_grind_back50 )
-   {
+   else if( new_activity == k_skate_activity_grind_back50 ){
       if( s->state.activity != k_skate_activity_grind_back50 )
          skate_store_grind_vec( player, &inf_back50 );
 
       skate_grind_truck_apply( player,  1.0f, &inf_back50, 1.0f );
    }
-   else if( new_activity == k_skate_activity_grind_front50 )
-   {
+   else if( new_activity == k_skate_activity_grind_front50 ){
       if( s->state.activity != k_skate_activity_grind_front50 )
          skate_store_grind_vec( player, &inf_front50 );
 
@@ -1952,7 +2080,7 @@ VG_STATIC enum skate_activity skate_availible_grind( player_instance *player )
 VG_STATIC void player__skate_update( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
-   world_instance *world = get_active_world();
+   world_instance *world = world_current_instance();
 
    v3_copy( player->rb.co, s->state.prev_pos );
    s->state.activity_prev = s->state.activity;
@@ -1988,7 +2116,7 @@ VG_STATIC void player__skate_update( player_instance *player )
 
    float slap = 0.0f;
 
-   if( s->state.activity == k_skate_activity_air ){
+   if( s->state.activity <= k_skate_activity_air_to_grind ){
 
       float min_dist = 0.6f;
       for( int i=0; i<2; i++ ){
@@ -2000,21 +2128,15 @@ VG_STATIC void player__skate_update( player_instance *player )
          }
       }
       min_dist -= 0.2f;
-      float o = vg_clampf( min_dist/0.5f, 0.0f, 1.0f );
-
-#if 0
-      float jump_t = vg.time - s->state.jump_time;
-            jump_t = vg_minf( o, 1.0f );
-#endif
+      float vy = v3_dot( player->basis[1], player->rb.v );
+            vy = vg_maxf( 0.0f, vy );
 
-      slap = o*0.3f;//vg_minf((1.0f-fabsf(2.0f*jump_t-1.0f))*8.0f,1.0f) * 0.3f;
-      wheels[0].pos[1] = slap;
-      wheels[1].pos[1] = slap;
+      slap = vg_clampf( (min_dist/0.5f) + vy, 0.0f, 1.0f )*0.3f;
    }
-   s->slap = slap;
-
-
+   s->state.slap = vg_lerpf( s->state.slap, slap, 10.0f*k_rb_delta );
 
+   wheels[0].pos[1] = s->state.slap;
+   wheels[1].pos[1] = s->state.slap;
 
 
 
@@ -2030,8 +2152,12 @@ VG_STATIC void player__skate_update( player_instance *player )
 
    v3_zero( s->surface_picture );
 
-   for( int i=0; i<k_wheel_count; i++ )
+   int prev_contacts[2];
+
+   for( int i=0; i<k_wheel_count; i++ ){
       wheels[i].state = k_collider_state_default;
+      prev_contacts[i] = s->wheel_contacts[i];
+   }
 
    /* check if we can enter or continue grind */
    enum skate_activity grindable_activity = skate_availible_grind( player );
@@ -2055,11 +2181,32 @@ VG_STATIC void player__skate_update( player_instance *player )
 
          v3_add( normal, s->surface_picture, s->surface_picture );
          contact_count ++;
+         s->wheel_contacts[i] = 1;
+      }
+      else{
+         s->wheel_contacts[i] = 0;
       }
 
       m3x3_mulv( player->rb.to_local, axel, s->truckv0[i] );
    }
 
+   if( s->surface_cooldown ){
+      s->surface_cooldown --;
+      contact_count = 0;
+   }
+
+   if( (prev_contacts[0]+prev_contacts[1] == 1) && (contact_count == 2) ){
+      audio_lock();
+      for( int i=0; i<2; i++ ){
+         if( !prev_contacts[i] ){
+            v3f co;
+            m4x3_mulv( player->rb.to_world, wheels[i].pos, co );
+            audio_oneshot_3d( &audio_taps[vg_randu32()%4], co, 40.0f, 0.75f );
+         }
+      }
+      audio_unlock();
+   }
+
    if( contact_count ){
       s->state.activity = k_skate_activity_ground;
       s->state.gravity_bias = k_gravity;
@@ -2069,7 +2216,9 @@ VG_STATIC void player__skate_update( player_instance *player )
       skate_weight_distribute( player );
    }
    else{
-      s->state.activity = k_skate_activity_air;
+      if( s->state.activity > k_skate_activity_air_to_grind )
+         s->state.activity = k_skate_activity_air;
+
       v3_zero( s->weight_distribution );
       skate_apply_air_model( player );
    }
@@ -2110,8 +2259,7 @@ begin_collision:;
    v4f future_q;
    v3_muladds( player->rb.co, player->rb.v, s->substep, future_co );
 
-   if( v3_length2( player->rb.w ) > 0.0f )
-   {
+   if( v3_length2( player->rb.w ) > 0.0f ){
       v4f rotation;
       v3f axis;
       v3_copy( player->rb.w, axis );
@@ -2240,7 +2388,7 @@ begin_collision:;
    v3_muls( player->rb.to_world[2], -1.0f, mtx[1] );
    v3_muls( player->rb.to_world[1],  1.0f, mtx[2] );
    v3_muladds( player->rb.to_world[3], player->rb.to_world[1], 
-               grind_radius + k_board_radius*0.25f+slap, mtx[3] );
+               grind_radius + k_board_radius*0.25f+s->state.slap, mtx[3] );
 
    rb_ct *cman = &manifold[manifold_len];
 
@@ -2255,16 +2403,19 @@ begin_collision:;
 
    manifold_len += l;
 
-   debug_capsule( mtx, capsule.radius, capsule.height, VG__WHITE );
+   if( vg_lines.draw )
+      debug_capsule( mtx, capsule.radius, capsule.height, VG__WHITE );
 
    /* add limits */
-   for( int i=0; i<s->limit_count; i++ ){
-      struct grind_limit *limit = &s->limits[i];
-      rb_ct *ct = &manifold[ manifold_len ++ ];
-      m4x3_mulv( player->rb.to_world, limit->ra, ct->co );
-      m3x3_mulv( player->rb.to_world, limit->n, ct->n );
-      ct->p = limit->p;
-      ct->type = k_contact_type_default;
+   if( s->state.activity >= k_skate_activity_grind_any ){
+      for( int i=0; i<s->limit_count; i++ ){
+         struct grind_limit *limit = &s->limits[i];
+         rb_ct *ct = &manifold[ manifold_len ++ ];
+         m4x3_mulv( player->rb.to_world, limit->ra, ct->co );
+         m3x3_mulv( player->rb.to_world, limit->n, ct->n );
+         ct->p = limit->p;
+         ct->type = k_contact_type_default;
+      }
    }
 
    /* 
@@ -2369,7 +2520,7 @@ begin_collision:;
       rb_ct *ct = &manifold[i];
       struct world_surface *surf = world_contact_surface( world, ct );
 
-      if( surf->info.surface_prop != k_surface_prop_concrete )
+      if( surf->info.surface_prop > s->surface )
          s->surface = surf->info.surface_prop;
    }
 
@@ -2401,6 +2552,8 @@ begin_collision:;
       v4f transport_rotation;
       m3x3_q( gate->transport, transport_rotation );
       q_mul( transport_rotation, player->rb.q, player->rb.q );
+      q_mul( transport_rotation, s->state.smoothed_rotation,
+                                 s->state.smoothed_rotation );
       rb_update_transform( &player->rb );
 
       s->state_gate_storage = s->state;
@@ -2410,23 +2563,36 @@ begin_collision:;
    /* FIXME: Rate limit */
    static int stick_frames = 0;
 
-   if( s->state.activity == k_skate_activity_ground )
+   if( s->state.activity >= k_skate_activity_ground )
       stick_frames ++;
    else
       stick_frames = 0;
 
+   if( stick_frames >  5 ) stick_frames =  5;
 
    if( stick_frames == 4 ){
       audio_lock();
-      if( (fabsf(s->state.slip) > 0.75f) ){
-         audio_oneshot_3d( &audio_lands[rand()%2+3], player->rb.co, 
-                           40.0f, 1.0f );
+
+      if( s->state.activity == k_skate_activity_ground ){
+         if( (fabsf(s->state.slip) > 0.75f) ){
+            audio_oneshot_3d( &audio_lands[vg_randu32()%2+3], player->rb.co, 
+                              40.0f, 1.0f );
+         }
+         else{
+            audio_oneshot_3d( &audio_lands[vg_randu32()%3], player->rb.co, 
+                              40.0f, 1.0f );
+         }
+      }
+      else if( s->surface == k_surface_prop_metal ){
+         audio_oneshot_3d( &audio_board[3], player->rb.co, 40.0f, 1.0f );
       }
       else{
-         audio_oneshot_3d( &audio_lands[rand()%3], player->rb.co, 
-                           40.0f, 1.0f );
+         audio_oneshot_3d( &audio_board[8], player->rb.co, 40.0f, 1.0f );
       }
+
       audio_unlock();
+   } else if( stick_frames == 0 ){
+      
    }
 }
 
@@ -2446,12 +2612,12 @@ VG_STATIC void player__skate_im_gui( player_instance *player )
    const char *activity_txt[] = 
    {
       "air",
+      "air_to_grind",
       "ground",
       "undefined (INVALID)",
       "grind_any (INVALID)",
       "grind_boardslide",
-      "grind_noseslide",
-      "grind_tailslide",
+      "grind_metallic (INVALID)",
       "grind_back50",
       "grind_front50",
       "grind_5050"
@@ -2476,7 +2642,7 @@ VG_STATIC void player__skate_im_gui( player_instance *player )
 }
 
 VG_STATIC void player__skate_animate( player_instance *player,
-                                     player_animation *dest )
+                                      player_animation *dest )
 {
    struct player_skate *s = &player->_skate;
    struct player_avatar *av = player->playeravatar;
@@ -2504,7 +2670,7 @@ VG_STATIC void player__skate_animate( player_instance *player,
 
    float curspeed  = v3_length( player->rb.v ),
          kickspeed = vg_clampf( curspeed*(1.0f/40.0f), 0.0f, 1.0f ),
-         kicks     = (vg_randf()-0.5f)*2.0f*kickspeed,
+         kicks     = (vg_randf64()-0.5f)*2.0f*kickspeed,
          sign      = vg_signf( kicks );
 
    s->wobble[0] = vg_lerpf( s->wobble[0], kicks*kicks*sign, 6.0f*vg.time_delta);
@@ -2519,6 +2685,8 @@ VG_STATIC void player__skate_animate( player_instance *player,
    offset[0]=vg_clampf(offset[0],-0.8f,0.8f)*(1.0f-fabsf(s->blend_slide)*0.9f);
    offset[1]=vg_clampf(offset[1],-0.5f,0.0f);
 
+   v3_muls( offset, 0.3f, TEMP_TPV_EXTRA );
+
    /* 
     * Animation blending
     * ===========================================
@@ -2526,22 +2694,28 @@ VG_STATIC void player__skate_animate( player_instance *player,
    
    /* sliding */
    {
-      float desired  = vg_clampf( fabsf( s->state.slip ), 0.0f, 1.0f );
+      float desired = 0.0f;
+      if( s->state.activity == k_skate_activity_ground )
+         desired = vg_clampf( fabsf( s->state.slip ), 0.0f, 1.0f );
+
       s->blend_slide = vg_lerpf( s->blend_slide, desired, 2.4f*vg.time_delta);
    }
    
    /* movement information */
    {
-      int iair = s->state.activity == k_skate_activity_air;
+      int iair = s->state.activity <= k_skate_activity_air_to_grind;
 
       float dirz = s->state.reverse > 0.0f? 0.0f: 1.0f,
             dirx = s->state.slip < 0.0f?    0.0f: 1.0f,
             fly  = iair?                    1.0f: 0.0f,
             wdist= s->weight_distribution[2] / k_board_length;
 
+      if( s->state.activity >= k_skate_activity_grind_any )
+         wdist = 0.0f;
+
       s->blend_z     = vg_lerpf( s->blend_z,      dirz,  2.4f*vg.time_delta );
       s->blend_x     = vg_lerpf( s->blend_x,      dirx,  0.6f*vg.time_delta );
-      s->blend_fly   = vg_lerpf( s->blend_fly,    fly,   2.4f*vg.time_delta );
+      s->blend_fly   = vg_lerpf( s->blend_fly,    fly,   3.4f*vg.time_delta );
       s->blend_weight= vg_lerpf( s->blend_weight, wdist, 9.0f*vg.time_delta );
    }
 
@@ -2576,11 +2750,10 @@ VG_STATIC void player__skate_animate( player_instance *player,
                                (vg.time - s->state.cur_push) < 0.125,
                                6.0f*vg.time_delta );
 
-      float pt = push_time + vg.accumulator;
       if( s->state.reverse > 0.0f )
-         skeleton_sample_anim( sk, s->anim_push, pt, bpose );
+         skeleton_sample_anim( sk, s->anim_push, push_time, bpose );
       else
-         skeleton_sample_anim( sk, s->anim_push_reverse, pt, bpose );
+         skeleton_sample_anim( sk, s->anim_push_reverse, push_time, bpose );
 
       skeleton_lerp_pose( sk, apose, bpose, s->blend_push, apose );
 
@@ -2607,7 +2780,11 @@ VG_STATIC void player__skate_animate( player_instance *player,
    
    mdl_keyframe air_pose[32];
    {
-      float target = -player->input_js1h->axis.value;
+      v2f steer;
+      joystick_state( k_srjoystick_steer, steer );
+
+      float target = -steer[1];
+
       s->blend_airdir = vg_lerpf( s->blend_airdir, target, 2.4f*vg.time_delta );
       
       float air_frame = (s->blend_airdir*0.5f+0.5f) * (15.0f/30.0f);
@@ -2615,9 +2792,10 @@ VG_STATIC void player__skate_animate( player_instance *player,
 
       static v2f grab_choice;
 
-      v2f grab_input = { player->input_js2h->axis.value,
-                         player->input_js2v->axis.value };
+      v2f grab_input;
+      joystick_state( k_srjoystick_grab, grab_input );
       v2_add( s->state.grab_mouse_delta, grab_input, grab_input );
+
       if( v2_length2( grab_input ) <= 0.001f )
          grab_input[0] = -1.0f;
       else
@@ -2634,6 +2812,40 @@ VG_STATIC void player__skate_animate( player_instance *player,
 
    skeleton_lerp_pose( sk, ground_pose, air_pose, s->blend_fly, dest->pose );
 
+
+   mdl_keyframe *kf_board    = &dest->pose[av->id_board-1],
+                *kf_foot_l   = &dest->pose[av->id_ik_foot_l-1],
+                *kf_foot_r   = &dest->pose[av->id_ik_foot_r-1],
+                *kf_knee_l   = &dest->pose[av->id_ik_knee_l-1],
+                *kf_knee_r   = &dest->pose[av->id_ik_knee_r-1],
+                *kf_hip      = &dest->pose[av->id_hip-1],
+                *kf_wheels[] = { &dest->pose[av->id_wheel_r-1],
+                                 &dest->pose[av->id_wheel_l-1] };
+
+
+   mdl_keyframe grind_pose[32];
+   {
+      float grind_frame = 0.5f;
+
+      if( s->state.activity == k_skate_activity_grind_front50 ){
+         grind_frame = 0.0f;
+      } else if( s->state.activity == k_skate_activity_grind_back50 ){
+         grind_frame = 1.0f;
+      }
+
+      float grind=s->state.activity >= k_skate_activity_grind_any? 1.0f: 0.0f;
+      s->blend_grind = vg_lerpf( s->blend_grind,  grind, 5.0f*vg.time_delta );
+      s->blend_grind_balance=vg_lerpf( s->blend_grind_balance, 
+                                       grind_frame, 5.0f*vg.time_delta );
+
+      grind_frame = s->blend_grind_balance * (15.0f/30.0f);
+
+      skeleton_sample_anim( sk, s->anim_grind, grind_frame, apose );
+      skeleton_sample_anim( sk, s->anim_grind_jump, grind_frame, bpose );
+      skeleton_lerp_pose( sk, apose, bpose, s->blend_jump, grind_pose );
+   }
+   skeleton_lerp_pose( sk, dest->pose, grind_pose, s->blend_grind, dest->pose );
+
    float add_grab_mod = 1.0f - s->blend_fly;
 
    /* additive effects */
@@ -2644,16 +2856,42 @@ VG_STATIC void player__skate_animate( player_instance *player,
                          av->id_ik_elbow_l,
                          av->id_ik_elbow_r };
 
-      for( int i=0; i<vg_list_size(apply_to); i ++ )
-      {
+      float apply_rates[] = { 1.0f,
+                              0.75f,
+                              0.75f,
+                              0.75f,
+                              0.75f };
+
+      for( int i=0; i<vg_list_size(apply_to); i ++ ){
          dest->pose[apply_to[i]-1].co[0] += offset[0]*add_grab_mod;
          dest->pose[apply_to[i]-1].co[2] += offset[2]*add_grab_mod;
       }
 
-
       /* angle correction */
-      if( v3_length2( s->state.up_dir ) > 0.001f )
-      {
+      if( v3_length2( s->state.up_dir ) > 0.001f ){
+
+         if( v4_length(s->state.smoothed_rotation) <= 0.1f ||
+             v4_length(s->state.smoothed_rotation) >= 1.1f ){
+            vg_warn( "FIX THIS! CARROT\n" );
+            v4_copy( player->rb.q, s->state.smoothed_rotation );
+         }
+         v4_lerp( s->state.smoothed_rotation, player->rb.q, 
+                  2.0f*vg.time_frame_delta,
+                  s->state.smoothed_rotation );
+         q_normalize( s->state.smoothed_rotation );
+
+         v3f yaw_ref    = {1.0f,0.0f,0.0f}, 
+             yaw_smooth = {1.0f,0.0f,0.0f};
+         q_mulv( player->rb.q, yaw_ref, yaw_ref );
+         q_mulv( s->state.smoothed_rotation, yaw_smooth, yaw_smooth );
+         m3x3_mulv( player->rb.to_local, yaw_smooth, yaw_smooth );
+         m3x3_mulv( player->rb.to_local, yaw_ref, yaw_ref );
+
+         float yaw_counter_rotate  = v3_dot(yaw_ref,yaw_smooth);
+               yaw_counter_rotate  = vg_clampf(yaw_counter_rotate,-1.0f,1.0f);
+               yaw_counter_rotate  = acosf( yaw_counter_rotate );
+               yaw_counter_rotate *= 1.0f-s->blend_fly;
+
          v3f ndir;
          m3x3_mulv( player->rb.to_local, s->state.up_dir, ndir );
          v3_normalize( ndir );
@@ -2664,24 +2902,24 @@ VG_STATIC void player__skate_animate( player_instance *player,
          a = acosf( vg_clampf( a, -1.0f, 1.0f ) );
 
          v3f axis;
-         v4f q;
+         v4f qfixup, qcounteryaw, qtotal;
          
          v3_cross( up, ndir, axis );
-         q_axis_angle( q, axis, a );
+         q_axis_angle( qfixup, axis, a );
+
+         q_axis_angle( qcounteryaw, (v3f){0.0f,1.0f,0.0f}, yaw_counter_rotate );
+         q_mul( qcounteryaw, qfixup, qtotal );
+         q_normalize( qtotal );
 
          mdl_keyframe *kf_hip = &dest->pose[av->id_hip-1];
-         
-         for( int i=0; i<vg_list_size(apply_to); i ++ )
-         {
-            mdl_keyframe *kf = &dest->pose[apply_to[i]-1];
+         v3f origin;
+         v3_add( av->sk.bones[av->id_hip].co, kf_hip->co, origin );
 
-            v3f v0;
-            v3_sub( kf->co, kf_hip->co, v0 );
-            q_mulv( q, v0, v0 );
-            v3_add( v0, kf_hip->co, kf->co );
+         for( int i=0; i<vg_list_size(apply_to); i ++ ){
+            mdl_keyframe *kf = &dest->pose[apply_to[i]-1];
 
-            q_mul( q, kf->q, kf->q );
-            q_normalize( kf->q );
+            keyframe_rotate_around( kf, origin, av->sk.bones[apply_to[i]].co,
+                                    qtotal );
          }
 
          v3f p1, p2;
@@ -2690,18 +2928,8 @@ VG_STATIC void player__skate_animate( player_instance *player,
 
          vg_line_arrow( player->rb.co, p1, 0.25f, VG__PINK );
          vg_line_arrow( player->rb.co, p2, 0.25f, VG__PINK );
-      }
-
-
 
-      mdl_keyframe *kf_board    = &dest->pose[av->id_board-1],
-                   *kf_foot_l   = &dest->pose[av->id_ik_foot_l-1],
-                   *kf_foot_r   = &dest->pose[av->id_ik_foot_r-1],
-                   *kf_knee_l   = &dest->pose[av->id_ik_knee_l-1],
-                   *kf_knee_r   = &dest->pose[av->id_ik_knee_r-1],
-                   *kf_hip      = &dest->pose[av->id_hip],
-                   *kf_wheels[] = { &dest->pose[av->id_wheel_r-1],
-                                    &dest->pose[av->id_wheel_l-1] };
+      }
 
       v4f qtotal;
       v4f qtrickr, qyawr, qpitchr, qrollr;
@@ -2725,32 +2953,56 @@ VG_STATIC void player__skate_animate( player_instance *player,
       v3f euler;
       v3_muls( s->state.trick_euler, VG_TAUf, euler );
 
+      float jump_t = vg.time-s->state.jump_time;
+
+      float k=17.0f;
+      float h = k*jump_t;
+      float extra = h*exp(1.0-h) * (s->state.jump_dir?1.0f:-1.0f);
+            extra *= s->state.slap * 4.0f;
+
       q_axis_angle( qyaw,   (v3f){0.0f,1.0f,0.0f}, euler[0] * 0.5f );
-      q_axis_angle( qpitch, (v3f){1.0f,0.0f,0.0f}, euler[1] );
+      q_axis_angle( qpitch, (v3f){1.0f,0.0f,0.0f}, euler[1] + extra );
       q_axis_angle( qroll,  (v3f){0.0f,0.0f,1.0f}, euler[2] );
 
-      q_mul( qpitch, qroll, qtrick );
-      q_mul( qyaw, qtrick, qtrick );
+      q_mul( qyaw, qroll, qtrick );
+      q_mul( qpitch, qtrick, qtrick );
       q_mul( kf_board->q, qtrick, kf_board->q );
       q_normalize( kf_board->q );
 
-      /* foot weight distribution */
-      if( s->blend_weight > 0.0f ){
-         kf_foot_l->co[2] += s->blend_weight * 0.2f;
-         kf_foot_r->co[2] += s->blend_weight * 0.1f;
-      }
-      else{
-         kf_foot_r->co[2] += s->blend_weight * 0.3f;
-         kf_foot_l->co[2] += s->blend_weight * 0.1f;
+      struct player_board *board = player_get_player_board( player );
+      
+      if( board ){
+         /* foot weight distribution */
+         if( s->blend_weight > 0.0f ){
+            kf_foot_l->co[2] = 
+               vg_lerpf( kf_foot_l->co[2], 
+                         board->truck_positions[k_board_truck_back][2]+0.3f, 
+                         0.5f*s->blend_weight );
+         }
+         else{
+            kf_foot_r->co[2] = 
+               vg_lerpf( kf_foot_r->co[2], 
+                         board->truck_positions[k_board_truck_front][2]-0.3f, 
+                         -0.5f*s->blend_weight );
+         }
       }
 
-      kf_foot_l->co[1] += s->slap;
-      kf_foot_r->co[1] += s->slap;
-      kf_knee_l->co[1] += s->slap;
-      kf_knee_r->co[1] += s->slap;
-      kf_board->co[1] += s->slap;
-      kf_hip->co[1] += s->slap * 0.25f;
-      
+      float slapm = vg_maxf( 1.0f-v3_length2( s->state.trick_vel ), 0.0f );
+      s->subslap = vg_lerpf( s->subslap, slapm, vg.time_delta*10.0f );
+
+      kf_foot_l->co[1] += s->state.slap;
+      kf_foot_r->co[1] += s->state.slap;
+      kf_knee_l->co[1] += s->state.slap;
+      kf_knee_r->co[1] += s->state.slap;
+      kf_board->co[1] += s->state.slap * s->subslap;
+      kf_hip->co[1] += s->state.slap * 0.25f;
+
+      /* 
+       * animation wishlist:
+       *    boardslide/grind jump animations
+       *    when tricking the slap should not appply or less apply
+       *    not animations however DONT target grinds that are vertically down.
+       */
 
       /* truck rotation */
       for( int i=0; i<2; i++ )
@@ -2765,17 +3017,51 @@ VG_STATIC void player__skate_animate( player_instance *player,
       }
    }
 
+   {
+      mdl_keyframe
+                *kf_head    = &dest->pose[av->id_head-1],
+                *kf_elbow_l = &dest->pose[av->id_ik_elbow_l-1],
+                *kf_elbow_r = &dest->pose[av->id_ik_elbow_r-1],
+                *kf_hand_l  = &dest->pose[av->id_ik_hand_l-1],
+                *kf_hand_r  = &dest->pose[av->id_ik_hand_r-1];
+
+      float warble = perlin1d( vg.time, 2.0f, 2, 300 );
+            warble *= vg_maxf(s->blend_grind,fabsf(s->blend_weight)) * 0.3f;
+
+      v4f qrot;
+      q_axis_angle( qrot, (v3f){0.8f,0.7f,0.6f}, warble );
+
+      v3f origin = {0.0f,0.2f,0.0f};
+      keyframe_rotate_around( kf_hand_l, origin, 
+                              av->sk.bones[av->id_ik_hand_l].co, qrot );
+      keyframe_rotate_around( kf_hand_r, origin, 
+                              av->sk.bones[av->id_ik_hand_r].co, qrot );
+      keyframe_rotate_around( kf_hip, origin, 
+                              av->sk.bones[av->id_hip].co, qrot );
+      keyframe_rotate_around( kf_elbow_r, origin, 
+                              av->sk.bones[av->id_ik_elbow_r].co, qrot );
+      keyframe_rotate_around( kf_elbow_l, origin, 
+                              av->sk.bones[av->id_ik_elbow_l].co, qrot );
+
+      q_inv( qrot, qrot );
+      q_mul( qrot, kf_head->q, kf_head->q );
+      q_normalize( kf_head->q );
+   }
+
    /* transform */
    rb_extrapolate( &player->rb, dest->root_co, dest->root_q );
-   v3_muladds( dest->root_co, player->rb.to_world[1], -0.1f, dest->root_co );
 
-   float substep = vg_clampf( vg.accumulator / VG_TIMESTEP_FIXED, 0.0f, 1.0f );
+   v3f ext_up,ext_co;
+   q_mulv( dest->root_q, (v3f){0.0f,1.0f,0.0f}, ext_up );
+   v3_copy( dest->root_co, ext_co );
+   v3_muladds( dest->root_co, ext_up, -0.1f, dest->root_co );
 
    v4f qflip;
-   if( (s->state.activity == k_skate_activity_air) &&
+   if( (s->state.activity <= k_skate_activity_air_to_grind) &&
        (fabsf(s->state.flip_rate) > 0.01f) )
    {
-      float t     = s->state.flip_time;
+      float substep = vg.time_fixed_extrapolate;
+      float t     = s->state.flip_time+s->state.flip_rate*substep*k_rb_delta;
             sign  = vg_signf( t );
 
       t  = 1.0f - vg_minf( 1.0f, fabsf( t * 1.1f ) );
@@ -2792,14 +3078,14 @@ VG_STATIC void player__skate_animate( player_instance *player,
       q_normalize( dest->root_q );
 
       v3f rotation_point, rco;
-      v3_muladds( player->rb.co, player->rb.to_world[1], 0.5f, rotation_point );
+      v3_muladds( ext_co, ext_up, 0.5f, rotation_point );
       v3_sub( dest->root_co, rotation_point, rco );
       
       q_mulv( qflip, rco, rco );
       v3_add( rco, rotation_point, dest->root_co );
    }
 
-   skeleton_copy_pose( sk, dest->pose, player->holdout_pose );
+   skeleton_copy_pose( sk, dest->pose, s->holdout );
 }
 
 VG_STATIC void player__skate_post_animate( player_instance *player )
@@ -2813,13 +3099,15 @@ VG_STATIC void player__skate_post_animate( player_instance *player )
    m4x3_mulv( av->sk.final_mtx[ av->id_head ], head, s->state.head_position );
    m4x3_mulv( player->rb.to_local, s->state.head_position, 
                                    s->state.head_position );
+
+   /* TODO: Extrapolate to_local matrix? */
 }
 
 VG_STATIC void player__skate_reset_animator( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
 
-   if( s->state.activity == k_skate_activity_air )
+   if( s->state.activity <= k_skate_activity_air_to_grind )
       s->blend_fly = 1.0f;
    else
       s->blend_fly = 0.0f;
@@ -2827,45 +3115,65 @@ VG_STATIC void player__skate_reset_animator( player_instance *player )
    s->blend_slide = 0.0f;
    s->blend_z = 0.0f;
    s->blend_x = 0.0f;
+   s->blend_grind = 0.0f;
+   s->blend_grind_balance = 0.0f;
    s->blend_stand = 0.0f;
    s->blend_push = 0.0f;
    s->blend_jump = 0.0f;
    s->blend_airdir = 0.0f;
+   s->blend_weight = 0.0f;
+   s->subslap = 0.0f;
+   v2_zero( s->wobble );
+
+   v3_zero( s->board_trick_residuald );
+   v3_zero( s->board_trick_residualv );
+   v3_zero( s->truckv0[0] );
+   v3_zero( s->truckv0[1] );
 }
 
 VG_STATIC void player__skate_clear_mechanics( player_instance *player )
 {
    struct player_skate *s = &player->_skate;
    s->state.jump_charge    = 0.0f;
-   s->state.lift_frames    = 0;
+   s->state.charging_jump  = 0;
+   s->state.jump_dir       = 0;
+   v3_zero( s->state.flip_axis );
+   s->state.flip_time      = 0.0f;
    s->state.flip_rate      = 0.0f;
-#if 0
-   s->state.steery         = 0.0f;
-   s->state.steerx         = 0.0f;
-   s->state.steery_s       = 0.0f;
-   s->state.steerx_s       = 0.0f;
-#endif
    s->state.reverse        = 0.0f;
    s->state.slip           = 0.0f;
+   s->state.grabbing       = 0.0f;
+   v2_zero( s->state.grab_mouse_delta );
+   s->state.slap           = 0.0f;
+   s->state.jump_time      = 0.0;
+   s->state.start_push     = 0.0;
+   s->state.cur_push       = 0.0;
+   s->state.air_start      = 0.0;
+
+   v3_zero( s->state.air_init_v );
+   v3_zero( s->state.air_init_co );
+
+   s->state.gravity_bias   = k_gravity;
    v3_copy( player->rb.co, s->state.prev_pos );
-
-#if 0
-   m3x3_identity( s->state.velocity_bias );
-   m3x3_identity( s->state.velocity_bias_pstep );
-#endif
-
+   v4_copy( player->rb.q, s->state.smoothed_rotation );
    v3_zero( s->state.throw_v );
    v3_zero( s->state.trick_vel );
    v3_zero( s->state.trick_euler );
+   v3_zero( s->state.cog_v );
+   s->grind_cooldown = 0;
+   s->surface_cooldown = 0;
+   v3_muladds( player->rb.co, player->rb.to_world[1], 1.0f, s->state.cog );
+   v3_copy( player->rb.to_world[1], s->state.up_dir );
+   v3_copy( player->rb.to_world[1], s->surface_picture );
+   v3_zero( s->weight_distribution );
+   v3_copy( player->rb.co, s->state.prev_pos );
 }
 
 VG_STATIC void player__skate_reset( player_instance *player,
                                     ent_spawn *rp )
 {
    struct player_skate *s = &player->_skate;
-   v3_muladds( player->rb.co, player->rb.to_world[1], 1.0f, s->state.cog );
    v3_zero( player->rb.v );
-   v3_zero( s->state.cog_v );
    v4_copy( rp->transform.q, player->rb.q );
 
    s->state.activity = k_skate_activity_air;
@@ -2878,4 +3186,10 @@ VG_STATIC void player__skate_reset( player_instance *player,
    s->state.head_position[1] = 1.8f;
 }
 
+VG_STATIC void player__skate_restore( player_instance *player )
+{
+   struct player_skate *s = &player->_skate;
+   s->state = s->state_gate_storage;
+}
+
 #endif /* PLAYER_SKATE_C */