X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=world.h;h=5318f8e326408c6d75624b2ed4ab8f7b38453328;hb=89113e9bc9544336b5ac4f53696c3de2d30698a2;hp=809397151e854c64b4508ceaf139a8e0e1c40c88;hpb=1b522daa02f28128498b04def4d60b63e590d1f3;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/world.h b/world.h
index 8093971..5318f8e 100644
--- a/world.h
+++ b/world.h
@@ -164,7 +164,8 @@ struct world_instance {
 
                  ent_audio_clip,
                  ent_audio,
-                 ent_volume;
+                 ent_volume,
+                 ent_traffic;
 
    ent_gate *rendering_gate;
 
@@ -547,6 +548,67 @@ VG_STATIC void world_update( world_instance *world, v3f pos )
    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;
+      }
+
+      v3_copy( pc, traffic->transform.co );
+
+      float a = atan2f( -v0[0], v0[2] );
+      q_axis_angle( traffic->transform.q, (v3f){0.0f,1.0f,0.0f}, -a );
+
+      vg_line_pt3( traffic->transform.co, 0.3f, VG__BLUE );
+   }
 
    /* ---- SFD ------------ */