200x perf improvement on world rendering task creation

src/rendering/backend_sokol.jai

@@ -143,9 +143,9 @@ backend_add_trile_positions :: (positions : []Trile_Instance, chunk: Chunk_Key)
     array_reset_keeping_memory(*trile_position_staging);
     for position : positions {
         array_add(*trile_position_staging, Vector4.{
-            cast(float)(position.x + chunk.x),
+            cast(float)(position.x + chunk.x * 32.0),
-            cast(float)(position.y + chunk.y),
+            cast(float)(position.y + chunk.y * 32.0),
-            cast(float)(position.z + chunk.z),
+            cast(float)(position.z + chunk.z * 32.0),
             cast(float)(position.orientation)
         });
     }
@@ -178,7 +178,11 @@ backend_draw_trile_positions_gbuffer :: (trile : string, amount : s32, worldConf
 
     offset := trile_offsets[offset_index];
 
-    trilegfx := get_trile_gfx(trile);
+    trilegfx, success := get_trile_gfx(trile);
+    if !success {
+        log_warn("Failed to get trile: %\n", trile);
+        return;
+    }
 
     vbuf, nbuf, cbuf : sg_buffer;
     vcount : s64;
@@ -217,7 +221,12 @@ backend_draw_trile_positions_main :: (trile : string, amount : s32, worldConf: *
         return;
     }
 
-    trilegfx := get_trile_gfx(trile);
+    trilegfx, success := get_trile_gfx(trile);
+    if !success {
+        log_warn("Failed to get trile: %\n", trile);
+        return;
+    }
+
     offset := trile_offsets[offset_index];
 
     // Pick mesh source based on LOD level. For shadow + gbuffer we keep the original pipeline
@@ -363,7 +372,11 @@ backend_add_trile_rdm_position :: (position: Vector4) {
 backend_draw_trile_rdm :: (trile: string, worldConf: *World_Config, atlas_rect: Vector4, offset_index: s32) {
     if offset_index >= trile_rdm_offsets.count then return;
 
-    trilegfx := get_trile_gfx(trile);
+    trilegfx, success := get_trile_gfx(trile);
+    if !success {
+        log_warn("Failed to get trile: %\n", trile);
+        return;
+    }
     offset := trile_rdm_offsets[offset_index];
 
     mvp := create_viewproj(*camera);

src/rendering/helpers.jai

@@ -83,34 +83,49 @@ create_world_rendering_tasks :: (world: *World, camera: Camera, plane_height: fl
     reflect_planes := extract_frustum_planes(reflect_mvp);
 
     for chunk: world.chunks {       
-        chunk_quadrant_vis : [8]bool;
+        // Skip chunks that are completely out of view.
-        any_vis            : bool;
-
-        for i: 0..1 {
-            for j: 0..1 {
-                for k: 0..1 {
         bmin := Vector3.{
-                        chunk.coord.x * 32.0 + i * 16.0,
+            chunk.coord.x * 32.0,
-                        chunk.coord.y * 32.0 + j * 16.0,
+            chunk.coord.y * 32.0,
-                        chunk.coord.z * 32.0 + k * 16.0
+            chunk.coord.z * 32.0
         };
-                    bmax := bmin + .{16, 16, 16};
+        bmax := bmin + .{32, 32, 32};
         in_cam     := aabb_in_frustum(cam_planes,     bmin, bmax);
         in_reflect := aabb_in_frustum(reflect_planes, bmin, bmax);
         in_shad    := aabb_in_frustum(shadow_planes,  bmin, bmax);
         vis        := in_cam || in_reflect || in_shad;
-                    chunk_quadrant_vis[i+j*2+k*2*2] = vis;
+        if !vis then continue;
-                    if !any_vis then any_vis = vis;
-                }
-            }
-        }
 
         for group : chunk.groups {
+            if group.instances.count < 1 then continue;
+
+
+            gmin := group.bounding_min;
+            gmax := group.bounding_max;
+
+            gmin += Vector3.{cast(float)chunk.coord.x * 32, cast(float)chunk.coord.y * 32, cast(float)chunk.coord.z * 32};
+            gmax += Vector3.{cast(float)chunk.coord.x * 32, cast(float)chunk.coord.y * 32, cast(float)chunk.coord.z * 32};
+            in_cam     := aabb_in_frustum(cam_planes,     gmin, gmax);
+            in_reflect := aabb_in_frustum(reflect_planes, gmin, gmax);
+            in_shad    := aabb_in_frustum(shadow_planes,  gmin, gmax);
+            vis        := in_cam || in_reflect || in_shad;
+
+            if !vis then continue;
+
+            diff := group.average_pos - camera.position;
+            dist := length(diff);
+            lod_index : s32 = 0;
+            for lod_dist : LOD_DISTANCES {
+                if dist < lod_dist then break;
+                lod_index += 1;
+            }
+            
             task := Rendering_Task_Trile.{
                 trile      = group.trile_name,
                 chunk_key  = chunk.coord,
                 positions  = group.instances,
-                worldConf = *world.conf
+                worldConf  = *world.conf,
+                lod_index = lod_index
             };
             add_rendering_task(task);
         }

src/world.jai

@@ -45,6 +45,12 @@ Trile_Instance :: struct {
 
 Chunk_Trile_Group :: struct {
     trile_name   : string;
+
+    // Precalculated to save time when we are creating render tasks.
+    bounding_min : Vector3;
+    bounding_max : Vector3;
+    average_pos  : Vector3;
+    
     instances    :  [..]Trile_Instance;
     is_buried    :  [..]bool;  // Runtime-only, parallel to instances. Not serialized.
 }
@@ -676,6 +682,25 @@ load_world_from_json :: (json_str: string, chunk_bin: []u8) -> (World, bool) {
                 inst := read_value(chunk_data, *chunk_cursor, Trile_Instance);
                 array_add(*group.instances, inst);
             }
+            gmin := Vector3.{31,31,31};
+            gmax := Vector3.{0,0,0};
+            gavg := Vector3.{0,0,0};
+        
+            for i : group.instances {
+                gmin.x = min(gmin.x, xx i.x);
+                gmin.y = min(gmin.y, xx i.y);
+                gmin.z = min(gmin.z, xx i.z);
+                gmax.x = max(gmax.x, xx i.x);
+                gmax.y = max(gmax.y, xx i.y);
+                gmax.z = max(gmax.z, xx i.z);
+
+                gavg += Vector3.{xx i.x, xx i.y, xx i.z};
+            }
+            gavg /= cast(float) group.instances.count;
+
+            group.bounding_min = gmin;
+            group.bounding_max = gmax;
+            group.average_pos  = gavg;
             array_add(*chunk.groups, group);
         }
         table_set(*world.chunks, chunk.coord, chunk);
@@ -771,6 +796,7 @@ load_world_from_data :: (data: []u8) -> (World, bool) {
                 inst := read_value(data, *chunk_cursor, Trile_Instance);
                 array_add(*group.instances, inst);
             }
+            
             array_add(*chunk.groups, group);
         }
         table_set(*world.chunks, chunk.coord, chunk);