X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=world.h;h=240e8dc1a44c77ec2b9be778e25e9d96ec688ccf;hb=a1adba47558099cab82aa6d10abdc1dca11d3342;hp=ba5d5e4b7409e7f57492aaef82cad54675cbf02a;hpb=b93c61c54e7ac56f6808b9a563d3e4221ca8482e;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/world.h b/world.h
index ba5d5e4..240e8dc 100644
--- a/world.h
+++ b/world.h
@@ -4,7 +4,7 @@
 
 #include "common.h"
 
-static int ray_world( v3f pos, v3f dir, ray_hit *hit );
+VG_STATIC int ray_world( v3f pos, v3f dir, ray_hit *hit );
 
 #ifndef WORLD_H
 #define WORLD_H
@@ -19,228 +19,331 @@ static int ray_world( v3f pos, v3f dir, ray_hit *hit );
 #include "bvh.h"
 #include "model.h"
 
-#include "traffic.h" /*TODO: -> world_traffic.h */
-
 #include "shaders/terrain.h"
 #include "shaders/sky.h"
-#include "shaders/planeinf.h"
 #include "shaders/standard.h"
 #include "shaders/vblend.h"
 #include "shaders/gpos.h"
-#include "shaders/fscolour.h"
+#include "shaders/blitcolour.h"
 #include "shaders/alphatest.h"
 
+typedef struct teleport_gate teleport_gate;
+
 enum { k_max_ui_segments = 8 };
-enum { k_max_ui_splits_per_segment = 16 };
 
-enum { k_max_ui_elements = k_max_ui_segments*k_max_ui_splits_per_segment };
+enum { k_max_ui_elements = k_max_ui_segments };
 enum { k_max_element_verts = 10 };
 enum { k_max_element_indices = 20 };
 
 enum { k_route_ui_max_verts = k_max_ui_elements*k_max_element_verts };
 enum { k_route_ui_max_indices = k_max_ui_elements*k_max_element_indices };
 
-static struct gworld
+enum logic_type
+{
+   k_logic_type_relay         = 1,
+   k_logic_type_chance        = 2,
+   k_logic_type_achievement   = 3
+};
+
+enum geo_type
+{
+   k_geo_type_solid = 0,
+   k_geo_type_nonsolid = 1,
+   k_geo_type_water = 2
+};
+
+VG_STATIC struct gworld
 {
-   struct subworld_gen
+   /*
+    * Allocated as system memory
+    * --------------------------------------------------------------------------
+    */
+
+   /* rendering */
+   glmesh skydome;
+   mdl_submesh dome_upper, dome_lower;
+
+   glmesh mesh_gate_surface;
+
+   double sky_time, sky_rate, sky_target_rate;
+
+   /* water rendering */
+   struct
    {
-      
+      struct framebuffer fbreflect, fbdepth;
+
+      boxf depthbounds;
+      int depth_computed;
+
+      float height;
+      int enabled;
+      v4f plane;
    }
-   subworld_gen;
+   water;
 
-   /* gameplay */
-   struct respawn_point
+   /* split flap display */
+   struct
    {
-      v3f co;
-      v4f q;
-      char name[32];
+      mdl_submesh *sm_module, *sm_card;
+      glmesh mesh_base, mesh_display;
+
+      u32 w, h;
+      float *buffer;
    }
-   spawns[32];
-   u32 spawn_count;
+   sfd;
 
-   struct achievement_zone
+   /* timing bars, fixed maximum amount */
+   struct route_ui_bar
    {
-      m4x3f transform, inv_transform;
-      char name[32];
-      int triggered;
-   }
-   * achievement_zones;
+      GLuint vao, vbo, ebo;
 
-   u32 achievement_zones_count,
-       achievement_zones_cap;
+      u32  indices_head;
+      u32  vertex_head;
 
-   struct subworld_routes
-   {
-      struct route_node
+      struct route_ui_segment
       {
-         v3f co, right, up, h;
-         u32 next[2];
-
-         u32 special_type, special_id, current_refs, ref_count;
-         u32 route_ids[4];    /* Gates can be linked into up to four routes */
+         float length;
+         u32 vertex_start, vertex_count,
+             index_start, index_count, notches;
       }
-      *nodes;
+      segments[k_max_ui_segments];
 
-      u32 node_count,
-          node_cap;
+      u32 segment_start, segment_count, fade_start, fade_count;
+      double fade_timer_start;
+      float xpos;
+   }
+   ui_bars[16];
 
-      struct route
-      {
-         u32 track_id;
-         v4f colour;
+   v3f render_gate_pos;
+   int active_route_board;
+   int in_trigger;
+
+   /* This is a small flag we use to changelevel.
+    * It will not be cleared until all sounds stop playing 
+    */
+   int   switching_to_new_world;
+   char  world_name[ 64 ];
+
+   /*
+    * Dynamically allocated when world_load is called.
+    *
+    *                  the following arrays index somewhere into this linear 
+    *                  allocator
+    *
+    * (world_gen.h)
+    * --------------------------------------------------------------------------
+    */
+   void *dynamic_vgl, 
+        *audio_vgl;  /* sub buffer of the audio buffer */
+
+   /*
+    * Main world .mdl 
+    */
+   mdl_context *meta;
+
+   /*
+    * Materials / textures 
+    */
+
+   GLuint *textures;
+   u32 texture_count;
+
+   struct world_material
+   {
+      mdl_material info;
+      mdl_submesh sm_geo,
+                  sm_no_collide;
+   }
+   * materials;
+   u32 material_count;
 
-         u32 start;
-         mdl_submesh sm;
-         
-         int active;
-         float factive;
+   /*
+    * Named safe places to respawn
+    */
+   struct respawn_point
+   {
+      v3f co;
+      v4f q;
+      const char *name;
+   }
+   * spawns;
+   u32 spawn_count;
 
-         double best_lap, latest_pass; /* Session */
+   /*
+    * Audio player entities
+    */
+   struct world_audio_thing
+   {
+      v3f pos;
+      float volume;
+      u32 flags;
 
-         struct 
-         {
-            GLuint vao, vbo, ebo;
+      audio_player player;
+      audio_clip temp_embedded_clip;
+   }
+   * audio_things;
+   u32 audio_things_count;
 
-            u32  indices_head;
-            u32  vertex_head;
+   /*
+    * Relays
+    */
+   struct logic_relay
+   {
+      v3f pos;
 
-            float last_notch;
+      struct relay_target
+      {
+         u32 sub_id;
+         enum classtype classtype;
+      }
+      targets[4];
+      u32 target_count;
+   }
+   * logic_relays;
+   u32 relay_count;
 
-            struct route_ui_segment
-            {
-               float length;
-               u32 vertex_start, vertex_count,
-                   index_start, index_count, notches;
-            }
-            segments[k_max_ui_segments];
+   /*
+    * Box trigger entities
+    */
+   struct trigger_zone
+   {
+      m4x3f transform, inv_transform;
 
-            u32 segment_start, segment_count, fade_start, fade_count;
-            double fade_timer_start;
-            float xpos;
-         }
-         ui;
+      struct relay_target target;
+   }
+   * triggers;
+   u32 trigger_count;
 
-         m4x3f scoreboard_transform;
-      }
-      *routes;
+   /*
+    * Achievements
+    */
+   struct logic_achievement
+   {
+      v3f pos;
+      const char *achievement_id;
+      u32 achieved;
+   }
+   * logic_achievements;
+   u32 achievement_count;
 
-      double time, rewind_from, rewind_to, last_use;
 
-      u32 route_count,
-          route_cap;
+   /*
+    * Routes (world_routes.h)
+    * --------------------------------------------------------------------------
+    */
+   struct route_node
+   {
+      v3f co, right, up, h;
+      u32 next[2];
 
-      struct route_gate
-      {
-         struct teleport_gate
-         { 
-            v3f co[2];
-            v4f q[2];
-            v2f dims;
-
-            m4x3f to_world, recv_to_world, transport;
-         } 
-         gate;
-         
-         u32 node_id;
-
-         struct route_timing
-         {
-            u32 version; /* Incremented on every teleport */
-            double time;
-         } 
-         timing;
-      }
-      *gates;
+      u32 special_type, special_id, current_refs, ref_count;
+      u32 route_ids[4];    /* Gates can be linked into up to four routes */
+   }
+   *nodes;
+   u32 node_count;
 
-      struct route_collector
-      {
-         struct route_timing timing;
-      }
-      *collectors;
+   struct route
+   {
+      u32 track_id;
+      v4f colour;
 
-      u32 gate_count,
-          gate_cap,
-          collector_count,
-          collector_cap;
+      u32 start;
+      mdl_submesh sm;
+      
+      int active;
+      float factive;
 
-      u32 active_gate,
-          current_run_version;
+      double best_lap, latest_pass; /* Session */
 
-      scene scene_lines;
+      m4x3f scoreboard_transform;
    }
-   routes;
+   *routes;
+   u32 route_count;
 
-   struct subworld_sfd
+   struct route_gate
    {
-      scene mesh;
-      mdl_submesh *sm_module, *sm_card;
-      glmesh temp;
+      struct teleport_gate
+      { 
+         v3f co[2];
+         v4f q[2];
+         v2f dims;
 
-      struct sfd_instance
-      {
-         float *buffer;
+         m4x3f to_world, recv_to_world, transport;
+      }
+      gate;
+
+      u32 node_id;
 
-         u32 w,h;
+      struct route_timing
+      {
+         u32 version; /* Incremented on every teleport */
+         double time;
       } 
-      tester;
+      timing;
    }
-   sfd;
+   *gates;
+   u32 gate_count;
 
-   /* Paths */
-   traffic_node traffic[128];
-   u32 traffic_count;
-
-#if 0
-   traffic_driver van_man[6];
-#endif
-
-   double sky_time, sky_rate, sky_target_rate;
-   
-   /* Physics */
-   
-   /* Rendering & geometry */
-   scene geo, foliage;
-   rigidbody rb_geo;
+   struct route_collector
+   {
+      struct route_timing timing;
+   }
+   *collectors;
+   u32 collector_count;
 
-   /* TODO Maybe make this less hardcoded */
-   mdl_submesh sm_geo_std_oob, sm_geo_std, sm_geo_vb,
-               sm_foliage_main, sm_foliage_alphatest,
-               sm_graffiti, sm_subworld, sm_terrain;
 
-   glmesh skybox, skydome;
-   mdl_submesh dome_upper, dome_lower;
+   /* logic 
+    * ----------------------------------------------------
+    */
 
-   glmesh cars;
-   mdl_submesh car_holden;
+   u32 active_gate,
+       current_run_version;
+   double time, rewind_from, rewind_to, last_use;
 
-   /* Load time */
+   /* world geometry */
+   scene *scene_geo, 
+         *scene_no_collide,
+         *scene_lines;
 
-   struct instance_cache
+   struct grind_edge
    {
-      mdl_header *mdl;
-      u32 pstr_file;
+      v3f p0, p1;
    }
-   * instance_cache;
-   u32 instance_cache_count,
-       instance_cache_cap;
+   *grind_edges;
+   u32 grind_edge_count;
 
-   v3f render_gate_pos;
-   int active_route_board;
+   /* spacial mappings */
+   bh_tree *audio_bh,
+           *trigger_bh,
+           *geo_bh,
+           *grind_bh;
+
+   /* graphics */
+   glmesh mesh_route_lines;
+
+   glmesh mesh_geo, 
+          mesh_no_collide,
+          mesh_water;
+
+   mdl_submesh sm_foliage_main;
+   rigidbody rb_geo;
 }
-world ;
+world;
+
 
 /*
  * API
  */
 
-static int ray_hit_is_ramp( ray_hit *hit );
-static int ray_hit_is_terrain( ray_hit *hit );
-static void ray_world_get_tri( ray_hit *hit, v3f tri[3] );
-static int ray_world( v3f pos, v3f dir, ray_hit *hit );
+VG_STATIC int ray_hit_is_ramp( ray_hit *hit );
+VG_STATIC struct world_material *ray_hit_material( ray_hit *hit );
+VG_STATIC void ray_world_get_tri( ray_hit *hit, v3f tri[3] );
+VG_STATIC int ray_world( v3f pos, v3f dir, ray_hit *hit );
 
 /*
  * Submodules
  */
+
 #include "world_routes.h"
 #include "world_sfd.h"
 #include "world_render.h"
@@ -254,111 +357,257 @@ static int ray_world( v3f pos, v3f dir, ray_hit *hit );
  * -----------------------------------------------------------------------------
  */
 
-static void world_init(void)
+VG_STATIC int world_stop_sound( int argc, const char *argv[] )
+{
+   /* 
+    * None of our world audio runs as one shots, they always have a player.
+    * Therefore it is safe to delete clip data after the players are
+    * disconnected
+    */
+   audio_lock();
+   for( int i=0; i<world.audio_things_count; i++ )
+   {
+      struct world_audio_thing *at = &world.audio_things[i];
+
+      if( audio_player_is_playing( &at->player ) )
+      {
+         u32 cflags = audio_player_get_flags( &at->player );
+         audio_player_set_flags( &at->player, cflags | AUDIO_FLAG_KILL );
+      }
+   }
+   audio_unlock();
+
+   return 0;
+}
+
+VG_STATIC int world_change_world( int argc, const char *argv[] )
 {
+   if( argc == 0 )
+   {
+      vg_info( "%s\n", world.world_name );
+      return 0;
+   }
+   else
+   {
+      vg_info( "Switching world...\n" );
+      strcpy( world.world_name, argv[0] );
+      world.switching_to_new_world = 1;
+      world_stop_sound( 0, NULL );
+   }
+
+   return 0;
+}
+
+VG_STATIC void world_init(void)
+{
+   vg_convar_push( (struct vg_convar){
+      .name = "water_enable",
+      .data = &world.water.enabled,
+      .data_type = k_convar_dtype_i32,
+      .opt_i32 = { .min=0, .max=1, .clamp=1 },
+      .persistent = 0
+   });
+
+	vg_function_push( (struct vg_cmd)
+   {
+		.name = "world_stop_sound",
+		.function = world_stop_sound
+	});
+
+	vg_function_push( (struct vg_cmd)
+   {
+		.name = "world",
+		.function = world_change_world
+	});
+
    world.sky_rate = 1.0;
    world.sky_target_rate = 1.0;
 
    shader_terrain_register();
    shader_sky_register();
-   shader_planeinf_register();
    shader_gpos_register();
-   shader_fscolour_register();
+   shader_blitcolour_register();
    shader_alphatest_register();
 
    vg_info( "Loading world resources\n" );
-
-   VG_REQUIRED_ASSET( mdl_header*, mcars, mdl_load, "models/rs_cars.mdl" );
-   VG_REQUIRED_ASSET( mdl_header*, msky,  mdl_load, "models/rs_skydome.mdl" );
-
-   mdl_node *nholden = mdl_node_from_name( mcars, "holden" );
-   world.car_holden = *mdl_node_submesh( mcars, nholden, 0 );
-
-   mdl_node *nlower = mdl_node_from_name( msky, "dome_lower" ),
-            *nupper = mdl_node_from_name( msky, "dome_upper" );
    
-   world.dome_lower = *mdl_node_submesh( msky, nlower, 0 );
+   vg_linear_clear( vg_mem.scratch );
+   mdl_context *msky = mdl_load_full( vg_mem.scratch, "models/rs_skydome.mdl" );
+
+   mdl_node *nupper = mdl_node_from_name( msky, "dome_complete" );
    world.dome_upper = *mdl_node_submesh( msky, nupper, 0 );
 
    vg_acquire_thread_sync();
    {
-      mdl_unpack_glmesh( mcars, &world.cars );
       mdl_unpack_glmesh( msky, &world.skydome );
    }
    vg_release_thread_sync();
 
-   vg_free(mcars);
-   vg_free(msky);
-
    /* Other systems */
    vg_info( "Loading other world systems\n" );
 
-   vg_loader_highwater( world_render_init, world_render_free, NULL );
-   vg_loader_highwater( world_sfd_init, world_sfd_free, NULL );
-   vg_loader_highwater( world_water_init, world_water_free, NULL );
-   vg_loader_highwater( world_gates_init, world_gates_free, NULL );
-   vg_loader_highwater( world_routes_init, world_routes_free, NULL );
+   vg_loader_step( world_render_init, NULL );
+   vg_loader_step( world_sfd_init, NULL );
+   vg_loader_step( world_water_init, NULL );
+   vg_loader_step( world_gates_init, NULL );
+   vg_loader_step( world_routes_init, NULL );
+
+   /* Allocate dynamic world memory arena */
+   u32 max_size = 76*1024*1024;
+   world.dynamic_vgl = vg_create_linear_allocator( vg_mem.rtmemory, max_size,
+                                                   VG_MEMORY_SYSTEM );
+}
+
+VG_STATIC void world_audio_init(void)
+{
+   u32 size = vg_linear_remaining( vg_audio.audio_pool ) 
+               - sizeof(vg_linear_allocator);
+
+   world.audio_vgl = vg_create_linear_allocator( vg_audio.audio_pool, 
+                                                 size, VG_MEMORY_SYSTEM );
 }
 
-static void world_free( void *_ )
+VG_STATIC void world_trigger_achievement( u32 uid )
 {
-   mesh_free( &world.cars );
-   mesh_free( &world.skydome );
-   vg_free( world.achievement_zones );
+   struct logic_achievement *ach = &world.logic_achievements[ uid ];
+
+   if( ach->achieved )
+      return;
+
+   steam_set_achievement( ach->achievement_id );
+   steam_store_achievements();
+
+   ach->achieved = 1;
 }
 
-static void world_update( v3f pos )
+VG_STATIC void world_run_relay( struct relay_target *rt );
+VG_STATIC void world_trigger_relay( u32 uid )
 {
+   struct logic_relay *relay = &world.logic_relays[ uid ];
+
+   for( int i=0; i<relay->target_count; i++ )
+   {
+      world_run_relay( &relay->targets[i] );
+   }
+}
+
+VG_STATIC void world_trigger_audio( u32 uid )
+{
+   struct world_audio_thing *wat = &world.audio_things[ uid ];
+
+   audio_lock();
+   audio_player_playclip( &wat->player, 
+                          &wat->temp_embedded_clip );
+   audio_unlock();
+}
+
+VG_STATIC void world_run_relay( struct relay_target *rt )
+{
+   struct entity_instruction
+   {
+      enum classtype classtype;
+      void (*p_trigger)( u32 uid );
+   }
+   entity_instructions[] =
+   {
+      { k_classtype_logic_achievement, world_trigger_achievement },
+      { k_classtype_logic_relay, world_trigger_relay },
+      { k_classtype_audio, world_trigger_audio }
+   };
+
+   for( int i=0; i<vg_list_size(entity_instructions); i++ )
+   {
+      struct entity_instruction *instr = &entity_instructions[i];
+
+      if( instr->classtype == rt->classtype )
+      {
+         instr->p_trigger( rt->sub_id );
+         return;
+      }
+   }
+
+   vg_error( "Don't know how to trigger classtype %d\n", rt->classtype );
+}
+
+VG_STATIC void world_update( v3f pos )
+{
+   if( world.switching_to_new_world )
+   {
+      int all_stopped = 1;
+
+      audio_lock();
+      for( int i=0; i<world.audio_things_count; i++ )
+      {
+         struct world_audio_thing *at = &world.audio_things[i];
+
+         if( audio_player_is_playing( &at->player ) )
+         {
+            all_stopped = 0;
+            break;
+         }
+      }
+      audio_unlock();
+
+      if( all_stopped )
+      {
+         world.switching_to_new_world = 0;
+         world_unload();
+         vg_loader_start( world_load );
+         return;
+      }
+   }
+
    world.sky_time += world.sky_rate * vg.time_delta;
    world.sky_rate = vg_lerp( world.sky_rate, world.sky_target_rate, 
-                                 vg.time_delta * 10.0 );
+                                 vg.time_delta * 5.0 );
 
    world_routes_update();
 #if 0
    world_routes_debug();
 #endif
    
-   int closest = 0;
-   float min_dist = INFINITY;
-
-   for( int i=0; i<world.routes.route_count; i++ )
+   if( world.route_count > 0 )
    {
-      float d = v3_dist2( world.routes.routes[i].scoreboard_transform[3], pos );
+      int closest = 0;
+      float min_dist = INFINITY;
 
-      if( d < min_dist )
+      for( int i=0; i<world.route_count; i++ )
       {
-         min_dist = d;
-         closest = i;
-      }
-   }
+         float d = v3_dist2( world.routes[i].scoreboard_transform[3], pos );
 
-   if( (world.active_route_board != closest) || network_scores_updated )
-   {
-      network_scores_updated = 0;
-      world.active_route_board = closest;
-      struct subworld_sfd *sfd = &world.sfd;
+         if( d < min_dist )
+         {
+            min_dist = d;
+            closest = i;
+         }
+      }
 
-      struct route *route = &world.routes.routes[closest];
+      if( (world.active_route_board != closest) || network_scores_updated )
+      {
+         network_scores_updated = 0;
+         world.active_route_board = closest;
 
-      u32 id = route->track_id;
+         struct route *route = &world.routes[closest];
 
-      if( id != 0xffffffff )
-      {
-         struct netmsg_board *local_board = &scoreboard_client_data.boards[id];
+         u32 id = route->track_id;
 
-         for( int i=0; i<13; i++ )
+         if( id != 0xffffffff )
          {
-            sfd_encode( &sfd->tester, i, &local_board->data[27*i] );
+            struct netmsg_board *local_board = 
+               &scoreboard_client_data.boards[id];
+
+            for( int i=0; i<13; i++ )
+            {
+               sfd_encode( i, &local_board->data[27*i] );
+            }
          }
       }
    }
 
-   for( int i=0; i<world.achievement_zones_count; i++ )
+   int in_trigger = 0;
+   for( int i=0; i<world.trigger_count; i++ )
    {
-      struct achievement_zone *zone = &world.achievement_zones[i];
-
-      if( zone->triggered )
-         continue;
+      struct trigger_zone *zone = &world.triggers[i];
 
       v3f local;
       m4x3_mulv( zone->inv_transform, pos, local );
@@ -367,17 +616,21 @@ static void world_update( v3f pos )
           (fabsf(local[1]) <= 1.0f) &&
           (fabsf(local[2]) <= 1.0f) )
       {
-         zone->triggered = 1;
-         steam_set_achievement( zone->name );
-         steam_store_achievements();
+         in_trigger = 1;
+
+         if( !world.in_trigger )
+         {
+            world_run_relay( &zone->target );
+         }
       }
 
       vg_line_boxf_transformed( zone->transform, (boxf){{-1.0f,-1.0f,-1.0f},
                                                         { 1.0f, 1.0f, 1.0f}}, 
                                                         0xff00ff00 );
    }
-   
-   sfd_update( &world.sfd.tester );
+
+   world.in_trigger = in_trigger;
+   sfd_update();
 }
 
 /* 
@@ -386,33 +639,42 @@ static void world_update( v3f pos )
  * -----------------------------------------------------------------------------
  */
 
-static void ray_world_get_tri( ray_hit *hit, v3f tri[3] )
+VG_STATIC void ray_world_get_tri( ray_hit *hit, v3f tri[3] )
 {
    for( int i=0; i<3; i++ )
-      v3_copy( world.geo.verts[ hit->tri[i] ].co, tri[i] );
+      v3_copy( world.scene_geo->arrvertices[ hit->tri[i] ].co, tri[i] );
 }
 
-static int ray_world( v3f pos, v3f dir, ray_hit *hit )
+VG_STATIC int ray_world( v3f pos, v3f dir, ray_hit *hit )
 {
-   return scene_raycast( &world.geo, pos, dir, hit );
+   return scene_raycast( world.scene_geo, world.geo_bh, pos, dir, hit );
 }
 
-static int ray_hit_is_terrain( ray_hit *hit )
+VG_STATIC struct world_material *world_tri_index_material( u32 index )
 {
-   u32 valid_start = 0,
-       valid_end   = world.sm_terrain.vertex_count;
+   for( int i=1; i<world.material_count; i++ )
+   {
+      struct world_material *mat = &world.materials[i];
 
-   return (hit->tri[0] >= valid_start) &&
-          (hit->tri[0]  < valid_end);
+      if( (index >= mat->sm_geo.vertex_start) &&
+          (index  < mat->sm_geo.vertex_start+mat->sm_geo.vertex_count ) )
+      {
+         return mat;
+      }
+   }
+
+   /* error material */
+   return &world.materials[0];
 }
 
-static int ray_hit_is_ramp( ray_hit *hit )
+VG_STATIC struct world_material *world_contact_material( rb_ct *ct )
 {
-   u32 valid_start = world.sm_geo_std.vertex_start,
-       valid_end   = world.sm_geo_vb.vertex_start;
+   return world_tri_index_material( ct->element_id );
+}
 
-   return (hit->tri[0] >= valid_start) &&
-          (hit->tri[0]  < valid_end);
+VG_STATIC struct world_material *ray_hit_material( ray_hit *hit )
+{
+   return world_tri_index_material( hit->tri[0] );
 }
 
 #endif /* WORLD_H */