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class_name Chunk
extends Node3D
var grid_position := Vector3i.ZERO
var mesh: ArrayMesh = ArrayMesh.new()
@export var noise: FastNoiseLite
@export var blocks: Array = []
func generate_block_data(row: int, column: int, depth: int, empty: bool = false):
grid_position = Vector3i(row, column, depth)
blocks = []
blocks.resize(Global.CHUNK_SIZE.x * Global.CHUNK_SIZE.y * Global.CHUNK_SIZE.z)
for x in Global.CHUNK_SIZE.x:
for z in Global.CHUNK_SIZE.z:
var block_position := Vector3i(x, 0, z)
var block_global_position := Vector3i(
grid_position.x * Global.CHUNK_SIZE.x + block_position.x,
0,
grid_position.z * Global.CHUNK_SIZE.z + block_position.z
)
var height := Global.CHUNK_SIZE.y
if grid_position.y >= Global.GROUND_LEVEL:
var noise_2d := noise.get_noise_2d(
block_global_position.x,
block_global_position.z
) * 100
height = round(clamp(abs(noise_2d), 0, Global.CHUNK_SIZE.y))
for y in Global.CHUNK_SIZE.y:
block_position.y = y
block_global_position. y = grid_position.y * Global.CHUNK_SIZE.y + block_position.y
var value = noise.get_noise_3d(
block_global_position.x,
block_global_position.y,
block_global_position.z
) * 100
var type := Block.Type.AIR
if height < y:
type = Block.Type.AIR
else:
if value > -15:
type = Block.Type.GRASS
elif value > -20:
type = Block.Type.STONE
#if value > 4:
#type = Block.Type.GRASS
#if value < -4:
#type = Block.Type.STONE
##if value < -16:
##type = Block.Type.DIRT
#if value < -17 and value > -20:
#type = Block.Type.SAND
#if abs(value) > 21 and abs(value) < 21.25:
#type = [Block.Type.STONE, Block.Type.YELLOW_STONE, Block.Type.BLUE_STONE, Block.Type.RED_STONE, Block.Type.BLACK_STONE].pick_random()
##print(value)
var block = Block.new()
block.position = block_position
block.global_position = block_global_position
block.type = type
if empty or Global.MAX_HEIGHT < block.global_position.y:
block.type = Block.Type.AIR
var index := x + Global.CHUNK_SIZE.x * y + Global.CHUNK_SIZE.x * Global.CHUNK_SIZE.y * z
blocks[index] = block
func generate_mesh():
var material := preload("res://new_shader_material.tres")
var st = SurfaceTool.new()
st.begin(Mesh.PRIMITIVE_TRIANGLES)
st.set_material(material)
for index in blocks.size():
var block: Block = blocks[index]
if block.type == Block.Type.AIR:
continue
var block_front: Block
if is_chunk_border_face(block.position, Block.Face.BACK):
if chunk_exists(grid_position + Vector3i(0, 0, 1)):
var chunk_front := Global.chunks[grid_position + Vector3i(0, 0, 1)]
if chunk_front.is_inside_tree():
block_front = chunk_front.get_block(Vector3i(block.position.x, block.position.y, 0))
else:
block_front = get_block(block.position + Vector3i(0, 0, 1))
var block_back: Block
if is_chunk_border_face(block.position, Block.Face.FRONT):
if chunk_exists(grid_position + Vector3i(0, 0, -1)):
var chunk_back := Global.chunks[grid_position + Vector3i(0, 0, -1)]
if chunk_back.is_inside_tree():
block_back = chunk_back.get_block(Vector3i(
block.position.x, block.position.y, Global.CHUNK_SIZE.z - 1)
)
else:
block_back = get_block(block.position + Vector3i(0, 0, -1))
var block_right: Block
if is_chunk_border_face(block.position, Block.Face.RIGHT):
if chunk_exists(grid_position + Vector3i(1, 0, 0)):
var chunk_right := Global.chunks[grid_position + Vector3i(1, 0, 0)]
if chunk_right.is_inside_tree():
block_right = chunk_right.get_block(Vector3i(0, block.position.y, block.position.z))
else:
block_right = get_block(block.position + Vector3i(1, 0, 0))
var block_left: Block
if is_chunk_border_face(block.position, Block.Face.LEFT):
if chunk_exists(grid_position + Vector3i(-1, 0, 0)):
var chunk_left := Global.chunks[grid_position + Vector3i(-1, 0, 0)]
if chunk_left.is_inside_tree():
block_left = chunk_left.get_block(Vector3i(
Global.CHUNK_SIZE.x - 1, block.position.y, block.position.z)
)
else:
block_left = get_block(block.position + Vector3i(-1, 0, 0))
var block_top: Block
if is_chunk_border_face(block.position, Block.Face.TOP):
if chunk_exists(grid_position + Vector3i(0, 1, 0)):
var chunk_top := Global.chunks[grid_position + Vector3i(0, 1, 0)]
if chunk_top.is_inside_tree():
block_top = chunk_top.get_block(Vector3i(block.position.x, 0, block.position.z))
else:
block_top = get_block(block.position + Vector3i(0, 1, 0))
var block_bottom: Block
if is_chunk_border_face(block.position, Block.Face.BOTTOM):
if chunk_exists(grid_position + Vector3i(0, -1, 0)):
var chunk_bottom := Global.chunks[grid_position + Vector3i(0, -1, 0)]
if chunk_bottom.is_inside_tree():
block_bottom = chunk_bottom.get_block(Vector3i(
block.position.x, Global.CHUNK_SIZE.y - 1, block.position.z)
)
else:
block_bottom = get_block(block.position + Vector3i(0, -1, 0))
if not block.type == Block.Type.AIR:
if block.type == Block.Type.GRASS:
if block_top and block_top.type != Block.Type.AIR:
block.type = Block.Type.DIRT
elif block.type == Block.Type.DIRT:
if not block_top or block_top.type == Block.Type.AIR:
block.type = Block.Type.GRASS
var rng = RandomNumberGenerator.new()
rng.seed = randi()
st.set_color(Color(rng.randf(), rng.randf(), rng.randf()))
st.set_uv(Vector2(0, 0))
if not block_front or block_front.type == Block.Type.AIR:
block.add_face(st, Block.Face.FRONT)
if not block_back or block_back.type == Block.Type.AIR:
block.add_face(st, Block.Face.BACK)
if not block_right or block_right.type == Block.Type.AIR:
block.add_face(st, Block.Face.RIGHT)
if not block_left or block_left.type == Block.Type.AIR:
block.add_face(st, Block.Face.LEFT)
if not block_top or block_top.type == Block.Type.AIR:
block.add_face(st, Block.Face.TOP)
if not block_bottom or block_bottom.type == Block.Type.AIR:
block.add_face(st, Block.Face.BOTTOM)
#st.generate_normals()
mesh = st.commit()
func update_mesh() -> void:
$MeshInstance3D.mesh = mesh
var shape := ConcavePolygonShape3D.new()
var faces := mesh.get_faces()
if faces.size() > 0:
shape.set_faces(mesh.get_faces())
$StaticBody3D/CollisionShape3D.shape = shape
func add_to(node: Node) -> void:
name = "Chunk_%s_%s_%s" % [grid_position.x, grid_position.y, grid_position.z]
node.add_child(self, true)
update_mesh()
func generate_chunk(row: int, column: int, depth: int):
if blocks.is_empty():
generate_block_data(row, column, depth)
generate_mesh()
func add_block(block_position: Vector3, block_type: Block.Type = Block.Type.GRASS) -> void:
var block = Block.new()
block.position = Vector3i(block_position)
block.global_position = Vector3i(
grid_position.x * Global.CHUNK_SIZE.x + block.position.x,
grid_position.y * Global.CHUNK_SIZE.y + block.position.y,
grid_position.z * Global.CHUNK_SIZE.z + block.position.z
)
block.type = block_type
#blocks[block_position.x][block_position.y][block_position.z] = block
set_block(block.position, block)
#generate_mesh.call_deferred()
func remove_block(block_position: Vector3) -> void:
#blocks[block_position.x][block_position.y][block_position.z].type = Block.Type.AIR
var block := get_block(block_position)
block.type = Block.Type.AIR
set_block(block.position, block)
print(block_position)
func get_block(p: Vector3i) -> Block:
return blocks[p.x + Global.CHUNK_SIZE.x * p.y + Global.CHUNK_SIZE.x * Global.CHUNK_SIZE.y * p.z]
func set_block(p: Vector3i, block: Block) -> void:
blocks[p.x + Global.CHUNK_SIZE.x * p.y + Global.CHUNK_SIZE.x * Global.CHUNK_SIZE.y * p.z] = block
static func chunk_exists(chunk_position: Vector3i):
return Global.chunks.has(chunk_position)
#return x >= 0 and chunks.size() - 1 >= x and y >= 0 and chunks[x].size() - 1 >= y and z >= 0 and chunks[x][y].size() - 1 >= z
func block_exists(x: int, y: int, z: int):
return x >= 0 and blocks.size() - 1 >= x and y >= 0 and blocks[x].size() - 1 >= y and z >= 0 and blocks[x][y].size() - 1 >= z
func is_chunk_border(p: Vector3i):
return p.x == 0 or p.x == Global.CHUNK_SIZE.x - 1 or p.y == 0 or p.y == Global.CHUNK_SIZE.y - 1 or p.z == 0 or p.z == Global.CHUNK_SIZE.z - 1
func is_chunk_border_face(block_position: Vector3i, face: Block.Face) -> bool:
if face == Block.Face.FRONT:
return block_position.z == 0
elif face == Block.Face.BACK:
return block_position.z == Global.CHUNK_SIZE.z - 1
elif face == Block.Face.LEFT:
return block_position.x == 0
elif face == Block.Face.RIGHT:
return block_position.x == Global.CHUNK_SIZE.z - 1
elif face == Block.Face.BOTTOM:
return block_position.y == 0
elif face == Block.Face.TOP:
return block_position.y == Global.CHUNK_SIZE.y - 1
return false
func get_bordering_chunks(block_position: Vector3i) -> Array[Vector3i]:
var bordering_chunks := [] as Array[Vector3i]
if not is_chunk_border(block_position):
return bordering_chunks
if block_position.z == 0:
bordering_chunks.append(grid_position + Vector3i(0, 0, -1))
elif block_position.z == Global.CHUNK_SIZE.z - 1:
bordering_chunks.append(grid_position + Vector3i(0, 0, 1))
if block_position.x == 0:
bordering_chunks.append(grid_position + Vector3i(-1, 0, 0))
elif block_position.x == Global.CHUNK_SIZE.x - 1:
bordering_chunks.append(grid_position + Vector3i(1, 0, 0))
if block_position.y == 0:
bordering_chunks.append(grid_position + Vector3i(0, -1, 0))
elif block_position.y == Global.CHUNK_SIZE.y - 1:
bordering_chunks.append(grid_position + Vector3i(0, 1, 0))
return bordering_chunks
func get_neighboring_blocks(_block_position: Vector3i) -> Array[Vector3i]:
return []
@warning_ignore("shadowed_variable_base_class")
static func global_to_chunk(global_position: Vector3, normal: Vector3) -> Vector3i:
return floor((global_position - normal * (Block.BLOCK_SIZE * 0.5)) / Vector3(Global.CHUNK_SIZE))
@warning_ignore("shadowed_variable_base_class")
static func global_to_chunk_block(global_position: Vector3, normal: Vector3) -> Vector3i:
return global_to_block(global_position, normal) - Global.CHUNK_SIZE * global_to_chunk(global_position, normal)
@warning_ignore("shadowed_variable_base_class")
static func global_to_block(global_position: Vector3, normal: Vector3) -> Vector3i:
return floor(global_position - normal * (Block.BLOCK_SIZE * 0.5))
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