+ float mod = world->probabilities[ audio->probability_curve ],
+ p = clip->probability * mod;
+
+ bar += p;
+
+ if( chance < bar ){
+
+ audio_lock();
+
+ if( audio->behaviour == k_channel_behaviour_unlimited ){
+ audio_oneshot_3d( &clip->clip, sound_co,
+ audio->transform.s[0],
+ audio->volume );
+ }
+ else if( audio->behaviour == k_channel_behaviour_discard_if_full ){
+ audio_channel *ch =
+ audio_get_group_idle_channel( audio->group,
+ audio->max_channels );
+
+ if( ch ){
+ audio_channel_init( ch, &clip->clip, audio->flags );
+ audio_channel_group( ch, audio->group );
+ audio_channel_set_spacial( ch, sound_co, audio->transform.s[0] );
+ audio_channel_edit_volume( ch, audio->volume, 1 );
+ ch = audio_relinquish_channel( ch );
+ }
+ }
+ else if( audio->behaviour == k_channel_behaviour_crossfade_if_full){
+ audio_channel *ch =
+ audio_get_group_idle_channel( audio->group,
+ audio->max_channels );
+
+ /* group is full */
+ if( !ch ){
+ audio_channel *existing =
+ audio_get_group_first_active_channel( audio->group );
+
+ if( existing ){
+ if( existing->source == &clip->clip ){
+ audio_unlock();
+ return;
+ }
+
+ existing->group = 0;
+ existing = audio_channel_fadeout(existing, audio->crossfade);
+ }
+
+ ch = audio_get_first_idle_channel();
+ }
+
+ if( ch ){
+ audio_channel_init( ch, &clip->clip, audio->flags );
+ audio_channel_group( ch, audio->group );
+ audio_channel_fadein( ch, audio->crossfade );
+ ch = audio_relinquish_channel( ch );
+ }
+ }
+
+ audio_unlock();
+ return;
+ }
+ }
+}
+
+VG_STATIC void entity_call( world_instance *world, ent_call *call )
+{
+ if( call->ent.type == k_ent_volume ){
+ ent_volume_call( world, call );
+ } else if( call->ent.type == k_ent_audio ){
+ ent_audio_call( world, call );
+ }
+}
+
+VG_STATIC void world_update( world_instance *world, v3f pos )
+{
+ world_global.sky_time += world_global.sky_rate * vg.time_delta;
+ world_global.sky_rate = vg_lerp( world_global.sky_rate,
+ world_global.sky_target_rate,
+ vg.time_delta * 5.0 );
+
+ world_routes_update_timer_texts( world );
+ world_routes_update( world );
+ //world_routes_debug( world );
+
+ /* ---- traffic -------- */
+
+ for( u32 i=0; i<mdl_arrcount( &world->ent_traffic ); i++ ){
+ ent_traffic *traffic = mdl_arritm( &world->ent_traffic, i );
+
+ u32 i1 = traffic->index,
+ i0,
+ i2 = i1+1;
+
+ if( i1 == 0 ) i0 = traffic->node_count-1;
+ else i0 = i1-1;
+
+ if( i2 >= traffic->node_count ) i2 = 0;
+
+ i0 += traffic->start_node;
+ i1 += traffic->start_node;
+ i2 += traffic->start_node;
+
+ v3f h[3];
+
+ ent_route_node *rn0 = mdl_arritm( &world->ent_route_node, i0 ),
+ *rn1 = mdl_arritm( &world->ent_route_node, i1 ),
+ *rn2 = mdl_arritm( &world->ent_route_node, i2 );
+
+ v3_copy( rn1->co, h[1] );
+ v3_lerp( rn0->co, rn1->co, 0.5f, h[0] );
+ v3_lerp( rn1->co, rn2->co, 0.5f, h[2] );
+
+ float const k_sample_dist = 0.0025f;
+ v3f pc, pd;
+ eval_bezier3( h[0], h[1], h[2], traffic->t, pc );
+ eval_bezier3( h[0], h[1], h[2], traffic->t+k_sample_dist, pd );
+
+ v3f v0;
+ v3_sub( pd, pc, v0 );
+ float length = vg_maxf( 0.0001f, v3_length( v0 ) );
+ v3_muls( v0, 1.0f/length, v0 );
+
+ float mod = k_sample_dist / length;
+
+ traffic->t += traffic->speed * vg.time_delta * mod;
+
+ if( traffic->t > 1.0f ){
+ traffic->t -= 1.0f;
+
+ if( traffic->t > 1.0f ) traffic->t = 0.0f;
+
+ traffic->index ++;
+
+ if( traffic->index >= traffic->node_count )
+ traffic->index = 0;
+ }