Godot Genre Open World

# async_chunk_loader.gd
extends Node
class_name AsyncChunkLoader

# Background Async Chunk Streamer
# Loads massive open-world chunks dynamically without stalling the main thread.

var _loading_tasks: Dictionary = {}

func request_chunk_load(chunk_id: String, path: String) -> void:
    # Pattern: Use ResourceLoader.load_threaded_request for non-blocking I/O.
    var error := ResourceLoader.load_threaded_request(path)
    if error == OK:
        _loading_tasks[chunk_id] = path

func _process(_delta: float) -> void:
    for chunk_id in _loading_tasks.keys():
        var path: String = _loading_tasks[chunk_id]
        var status := ResourceLoader.load_threaded_get_status(path)
        
        if status == ResourceLoader.THREAD_LOAD_LOADED:
            var chunk_scene := ResourceLoader.load_threaded_get(path) as PackedScene
            # EXTREMELY IMPORTANT: Defer instantiation to the main thread.
            call_deferred("_finalize_chunk_instance", chunk_id, chunk_scene)
            _loading_tasks.erase(chunk_id)

func _finalize_chunk_instance(_chunk_id: String, scene: PackedScene) -> void:
    if scene:
        var instance := scene.instantiate()
        add_child(instance)

# binary_save_manager.gd
extends Node
class_name BinarySaveManager

# Efficient Binary Serialization
# Saves massive world-states (thousands of entity flags) with minimal I/O overhead.

func save_world_state(data: Dictionary, path: String) -> void:
    # Pattern: Use FileAccess.store_var with full_objects=false for clean data.
    var file := FileAccess.open(path, FileAccess.WRITE)
    if file:
        file.store_var(data, false)
        file.close()

func load_world_state(path: String) -> Dictionary:
    if not FileAccess.file_exists(path): return {}
    
    var file := FileAccess.open(path, FileAccess.READ)
    var data = file.get_var(false)
    file.close()
    return data if data is Dictionary else {}

# chunk_limited_pathfinder.gd
extends Node
class_name ChunkLimitedPathfinder

# Chunk-Isolated AI Pathfinding
# Restricts pathfinding searches to valid navigation regions to save CPU.

func find_path_in_region(start: Vector3, end: Vector3, allowed_regions: Array[RID]) -> PackedVector3Array:
    # Pattern: Use NavigationServer3D directly for granular query control.
    var params := NavigationPathQueryParameters3D.new()
    params.start_position = start
    params.target_position = end
    
    # EXTREMELY IMPORTANT: Limits search to current/adjacent chunks only.
    params.included_regions = allowed_regions
    
    var result := NavigationPathQueryResult3D.new()
    NavigationServer3D.query_path(params, result)
    return result.path

# dynamic_lod_adjuster.gd
extends Node
class_name DynamicLODAdjuster

# Dynamic Performance/LOD Bias Adjuster
# Adjusts global mesh LOD thresholds based on real-time FPS stability.

func _process(_delta: float) -> void:
    var fps := Engine.get_frames_per_second()
    var viewport := get_viewport()
    
    # Pattern: Degrade mesh quality smoothly to maintain frame targets.
    if fps < 50.0:
        viewport.mesh_lod_threshold = lerp(viewport.mesh_lod_threshold, 3.0, 0.05)
    elif fps > 65.0:
        viewport.mesh_lod_threshold = lerp(viewport.mesh_lod_threshold, 1.0, 0.05)

# godot-master/scripts/open_world_floating_origin_shifter.gd
extends Node

## Floating Origin Shifter (Expert Pattern)
## Cyclically resets world origin to keep player near (0,0,0) and preserve float precision.

class_name FloatingOriginShifter

signal origin_shifted(offset: Vector3)

@export var threshold: float = 4000.0 # Setup safe buffer (limit is ~10k usually)
@export var world_root: Node3D # Parent of all world objects
@export var player: Node3D

func _physics_process(delta: float) -> void:
    if not player: return
    
    var dist = player.global_position.length()
    if dist > threshold:
        _shift_origin()

func _shift_origin() -> void:
    var shift_vector = -player.global_position
    # Keep Y if you want, usually full 3D shift is better
    shift_vector.y = 0 # Optional: Don't shift Y if you want height absolute
    
    # 1. Shift Root
    # Note: If player is child of world_root, this moves player too?
    # Strategy: Player usually SEPARATE from world content or handled carefully.
    # If using PhysicsServer directly, shift creates a warp.
    
    # Simplest Godot approach: Move everything EXCEPT player, then warp player?
    # OR: Move everything including player.
    
    print("Shifting Origin by: ", shift_vector)
    
    # Move all root level entities
    for node in get_tree().get_nodes_in_group("world_entities"):
        if node is Node3D:
            node.global_position += shift_vector
            
    # Move player
    player.global_position += shift_vector
    
    # Notify systems (e.g. Trail renderers needs clear)
    origin_shifted.emit(shift_vector)

## EXPERT USAGE:
## Group all static/dynamic world objects as "world_entities".
## Attach to autoload or persistent manager.

# group_weather_broadcaster.gd
extends Node
class_name GroupWeatherBroadcaster

# Global Environment Group Broadcasting
# Decouples weather logic from individual entities using high-speed group calls.

func apply_weather_state(weather_type: StringName) -> void:
    # Pattern: Avoid iterating nodes manually. Use call_group_flags for efficiency.
    get_tree().call_group_flags(
        SceneTree.GROUP_CALL_DEFERRED,
        &"environment_reactors",
        &"_on_weather_update",
        weather_type
    )

# hlod_visibility_config.gd
extends Node
class_name HLODVisibilityConfig

# VisibilityRange (HLOD) Configuration
# Swaps high-poly geometry for low-poly impostors across distance boundaries.

@export var high_detail_node: GeometryInstance3D
@export var low_detail_node: GeometryInstance3D
@export var transition_dist: float = 150.0

func _ready() -> void:
    if not high_detail_node or not low_detail_node: return
    
    # High-detail mesh fades out at transition.
    high_detail_node.visibility_range_end = transition_dist
    high_detail_node.visibility_range_end_margin = 10.0
    high_detail_node.visibility_range_fade_mode = GeometryInstance3D.VISIBILITY_RANGE_FADE_SELF
    
    # Low-detail impostor fades in at transition.
    low_detail_node.visibility_range_begin = transition_dist
    low_detail_node.visibility_range_begin_margin = 10.0
    low_detail_node.visibility_range_fade_mode = GeometryInstance3D.VISIBILITY_RANGE_FADE_DEPENDENCIES

# landscape_height_query.gd
extends Node3D
class_name LandscapeHeightQuery

# Grid-Based Raycast Floor Query
# Uses PhysicsDirectSpaceState for high-performance height checks for object placement.

func get_height_at(pos_x: float, pos_z: float) -> float:
    var space_state := get_world_3d().direct_space_state
    
    # Query from skyward downwards.
    var ray_start := Vector3(pos_x, 5000.0, pos_z)
    var ray_end := Vector3(pos_x, -1000.0, pos_z)
    
    var query := PhysicsRayQueryParameters3D.create(ray_start, ray_end)
    var result := space_state.intersect_ray(query)
    
    if not result.is_empty():
        return result.position.y
    return 0.0

extends Node3D
class_name LODLogicEnabler

## Expert LOD Logic (Godot 4.6).
## Performance-first logic throttling based on distance.

@export var ai_node: Node3D
@export var player: Node3D
@export var disable_dist_sq: float = 6400.0 # 80 meters squared

func _ready() -> void:
	# Optimization: Use a slow timer for distance checks
	var t = Timer.new()
	t.wait_time = 0.5
	t.timeout.connect(_check_distance)
	add_child(t)
	t.start()

func _check_distance() -> void:
	if not player or not ai_node: return
	var d2 = global_position.distance_squared_to(player.global_position)
	
	if d2 > disable_dist_sq:
		ai_node.process_mode = PROCESS_MODE_DISABLED
	else:
		ai_node.process_mode = PROCESS_MODE_INHERIT

## [SKILL NOTICE]: Use 'distance_squared_to' for LOD checks. 
## It skips expensive square-root math, vital for 1000s of entities.

# multimesh_foliage_manager.gd
extends MultiMeshInstance3D
class_name MultiMeshFoliageManager

# High-Performance Foliage Renderer
# Batch-renders thousands of static meshes (trees, rocks) in a single GPU draw call.

func setup_batch(mesh: Mesh, transforms: Array[Transform3D]) -> void:
    # Pattern: Use MultiMesh to bypass individual Node3D overhead.
    multimesh = MultiMesh.new()
    multimesh.transform_format = MultiMesh.TRANSFORM_3D
    multimesh.mesh = mesh
    
    # Pre-allocate count to prevent resizing during population.
    multimesh.instance_count = transforms.size()
    
    for i in range(transforms.size()):
        multimesh.set_instance_transform(i, transforms[i])
        
    # Pattern: Enable visibility range to cull entire batches based on distance.
    visibility_range_end = 500.0

# server_prop_spawner.gd
extends Node
class_name ServerPropSpawner

# Nodeless Server-Side Object Placement
# Spawns visuals directly in RenderingServer to bypass SceneTree overhead.

var _spawned_rids: Array[RID] = []

func spawn_visual_prop(mesh_rid: RID, material_rid: RID, xform: Transform3D) -> RID:
    # Pattern: Create rendering instance directly.
    var instance_rid := RenderingServer.instance_create()
    RenderingServer.instance_set_base(instance_rid, mesh_rid)
    RenderingServer.instance_set_surface_override_material(instance_rid, 0, material_rid)
    RenderingServer.instance_set_transform(instance_rid, xform)
    
    # Assign to current 3D world scenario.
    var scenario := get_world_3d().scenario
    RenderingServer.instance_set_scenario(instance_rid, scenario)
    
    _spawned_rids.append(instance_rid)
    return instance_rid

func clear_all() -> void:
    for rid in _spawned_rids:
        RenderingServer.free_rid(rid)
    _spawned_rids.clear()

extends Node
class_name WorldOriginShifter

## Expert Origin Shifting (Godot 4.6).
## Resets world origin to (0,0,0) to prevent jitter.

@export var world_root: Node3D
@export var player: Node3D
@export var threshold: float = 8192.0 # 32-bit float safe limit

var total_offset: Vector3 = Vector3.ZERO

func _physics_process(_delta: float) -> void:
	if player.global_position.length() > threshold:
		_perform_shift()

func _perform_shift() -> void:
	var shift = -player.global_position
	total_offset += shift
	
	# Shift world root and update physics interpolation
	world_root.global_position += shift
	player.global_position += shift
	player.reset_physics_interpolation()
	
	# Sync shaders (Global Uniforms)
	RenderingServer.global_shader_parameter_set("world_offset", total_offset)

## [SKILL NOTICE]: Use 'reset_physics_interpolation()' during 
## origin shifts to prevent 1-frame visual 'streaking' or 'warping'.

# godot-master/scripts/open_world_world_streamer.gd
extends Node3D

## World Streamer (Expert Pattern)
## Manages loading/unloading of open world sectors/chunks based on distance.
## Uses background threads to prevent stutters.

class_name WorldStreamer

@export var tile_size: float = 256.0
@export var load_radius: int = 2
@export var player: Node3D

var active_tiles: Dictionary = {} # Vector2i -> Node (Loaded Scene)
var load_queue: Array[Vector2i] = []
var thread: Thread
var semaphore: Semaphore
var mutex: Mutex
var exit_thread: bool = false

func _ready() -> void:
    mutex = Mutex.new()
    semaphore = Semaphore.new()
    thread = Thread.new()
    thread.start(_loader_thread_func)

func _process(delta: float) -> void:
    if not player: return
    
    var center = _get_tile_coord(player.global_position)
    
    # Simple unloader
    var keep = []
    for x in range(-load_radius, load_radius + 1):
         for z in range(-load_radius, load_radius + 1):
             keep.append(center + Vector2i(x, z))
             
    var to_unload = []
    for k in active_tiles:
        if not k in keep:
            to_unload.append(k)
            
    for k in to_unload:
        active_tiles[k].queue_free()
        active_tiles.erase(k)
        
    # Queue loader
    for k in keep:
        if not active_tiles.has(k) and not k in load_queue:
            load_queue.append(k)
            semaphore.post()

func _loader_thread_func() -> void:
    while true:
        semaphore.wait()
        if exit_thread: break
        
        mutex.lock()
        if load_queue.is_empty():
            mutex.unlock()
            continue
            
        var coord = load_queue.pop_front()
        mutex.unlock()
        
        # Simulate loading / Actual loading
        # var scene = load("res://world/chunks/chunk_%d_%d.tscn" % [coord.x, coord.y])
        # CALL DEFERRED to add to tree
        call_deferred("_finish_load", coord, Node3D.new()) # Placeholder

func _finish_load(coord: Vector2i, node: Node) -> void:
    if active_tiles.has(coord): 
        node.queue_free() # Duplicate
        return
        
    add_child(node)
    node.global_position = Vector3(coord.x * tile_size, 0, coord.y * tile_size)
    active_tiles[coord] = node

func _get_tile_coord(pos: Vector3) -> Vector2i:
    return Vector2i(round(pos.x / tile_size), round(pos.z / tile_size))

func _exit_tree() -> void:
    exit_thread = true
    semaphore.post()
    thread.wait_to_finish()

## EXPERT USAGE:
## Configure tile_size to match terrain chunks. 
## Ensure scene files follow a naming convention or use a Resource directory.