Basics of chunk generation

project.godot

@@ -17,6 +17,7 @@ config/features=PackedStringArray("4.5", "Forward Plus")
 [autoload]
 
 PhantomCameraManager="*res://addons/phantom_camera/scripts/managers/phantom_camera_manager.gd"
+WorldGenManager="*res://src/world/generation/worldgen_manager/worldgen_manager.tscn"
 
 [debug]
 

src/world/generation/chunk/chunk.gd

@@ -0,0 +1,29 @@
+class_name Chunk extends Node3D
+## A discrete generated chunk of the world
+
+const SIZE := Vector2(64, 64)
+const SCENE := preload("res://src/world/generation/chunk/chunk.tscn")
+
+
+func chunk_position() -> Vector2:
+	return Chunk.world_to_chunk(position)
+
+
+func generate() -> void:
+	# TODO: this
+	print_debug("Generating chunk at ", chunk_position())
+
+
+static func chunk_to_world(chunk_pos: Vector2) -> Vector3:
+	return Vector3(chunk_pos.x * SIZE.x, 0, chunk_pos.y * SIZE.y)
+
+
+static func world_to_chunk(world_pos: Vector3) -> Vector2:
+	return Vector2(world_pos.x / SIZE.x, world_pos.z / SIZE.y)
+
+
+static func generate_chunk(chunk_pos: Vector2) -> Chunk:
+	var instance: Chunk = SCENE.instantiate()
+	instance.position = Chunk.chunk_to_world(chunk_pos)
+	instance.generate()
+	return instance

src/world/generation/chunk/chunk.gd.uid

@@ -0,0 +1 @@
+uid://chqpqe4anvamd

src/world/generation/chunk/chunk.tscn

@@ -0,0 +1,23 @@
+[gd_scene load_steps=4 format=3 uid="uid://crs68yhijqkca"]
+
+[ext_resource type="Script" uid="uid://chqpqe4anvamd" path="res://src/world/generation/chunk/chunk.gd" id="1_87ter"]
+
+[sub_resource type="PlaneMesh" id="PlaneMesh_0cma0"]
+size = Vector2(64, 64)
+subdivide_width = 64
+subdivide_depth = 64
+center_offset = Vector3(32, 0, 32)
+
+[sub_resource type="ConvexPolygonShape3D" id="ConvexPolygonShape3D_87ter"]
+points = PackedVector3Array(1.9073486e-06, 0, 1.9073486e-06, 1.9073486e-06, 0, 64, 64, 0, 1.9073486e-06, 64, 0, 64)
+
+[node name="Chunk" type="Node3D"]
+script = ExtResource("1_87ter")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="."]
+mesh = SubResource("PlaneMesh_0cma0")
+
+[node name="StaticBody3D" type="StaticBody3D" parent="MeshInstance3D"]
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="MeshInstance3D/StaticBody3D"]
+shape = SubResource("ConvexPolygonShape3D_87ter")

src/world/generation/generated_world.gd

@@ -1,11 +1,21 @@
 class_name GeneratedWorld extends Node3D
 
+@export var generation_radius := 6.0
 
-# Called when the node enters the scene tree for the first time.
-func _ready() -> void:
-	pass  # Replace with function body.
+var chunks: Dictionary[Vector2, Chunk] = {}
 
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
+func get_chunk(chunk_pos: Vector2) -> Chunk:
+	if chunk_pos not in chunks:
+		var chunk := Chunk.generate_chunk(chunk_pos)
+		add_child(chunk)
+		chunks[chunk_pos] = chunk
+	return chunks[chunk_pos]
+
+
+func _process(_delta: float) -> void:
+	var camera := get_viewport().get_camera_3d()
+	var center := Chunk.world_to_chunk(camera.global_position)
+	for x in range(center.x - generation_radius, center.x + generation_radius):
+		for y in range(center.y - generation_radius, center.y + generation_radius):
+			get_chunk(Vector2(x, y))

src/world/generation/worldgen_manager/worldgen_manager.gd

@@ -0,0 +1,4 @@
+class_name WorldGenManagerType extends Node
+## Global autoloaded singleton controller for worldgen parameters
+
+@export var noise: FastNoiseLite

src/world/generation/worldgen_manager/worldgen_manager.gd.uid

@@ -0,0 +1 @@
+uid://7frynyj4vspc

src/world/generation/worldgen_manager/worldgen_manager.tscn

@@ -0,0 +1,10 @@
+[gd_scene load_steps=3 format=3 uid="uid://dxelp6rnok01y"]
+
+[ext_resource type="Script" uid="uid://7frynyj4vspc" path="res://src/world/generation/worldgen_manager/worldgen_manager.gd" id="1_7xvag"]
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_7xvag"]
+
+[node name="WorldGenManager" type="Node"]
+script = ExtResource("1_7xvag")
+noise = SubResource("FastNoiseLite_7xvag")
+metadata/_custom_type_script = "uid://7frynyj4vspc"