Add collaborative surface drawing

This commit is contained in:
Alexander Sellite 2026-08-01 22:55:39 -04:00
parent 6b7ef4c11b
commit b92c55562d
28 changed files with 3504 additions and 2 deletions

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extends SceneTree
const MainScene: PackedScene = preload("res://main/main.tscn")
const TEST_PORT: int = 18133
const WAIT_MSEC: int = 20000
func _initialize() -> void:
call_deferred("_run")
func _run() -> void:
var arguments: PackedStringArray = OS.get_cmdline_user_args()
if arguments.has("host"):
await _run_host()
return
if arguments.has("client"):
await _run_client()
return
push_error("Surface drawing multiplayer validation needs host or client mode.")
quit(1)
func _run_host() -> void:
var main: Node = await _create_initialized_main()
var session := main.get_node("%NetworkSession") as NetworkSession
assert(session.start_private_host(TEST_PORT))
var save_manager := main.get("_save_manager") as PlayerSaveManager
assert(save_manager.initialize_new_game())
main.call("_enter_gameplay")
await physics_frame
await physics_frame
var service := main.get_node(
"%NetworkSurfaceDrawingService"
) as NetworkSurfaceDrawingService
var surface: Dictionary = _surface_below_local_player(main)
assert(not surface.is_empty())
assert(service.request_canvas_at_surface(
surface["position"], surface["normal"], Vector3.RIGHT
))
var canvas_id: String = service.get_canvas_ids()[0]
assert(service.request_cell_edits(canvas_id, [{
"x": 7,
"y": 7,
"color_id": "coral",
}]))
assert(session.set_host_open(true))
var remote_peer_id: int = await _wait_for_remote_peer(session)
assert(remote_peer_id > 1)
var remote_record: PeerRegistry.PeerRecord = session.get_peer_record(
remote_peer_id
)
assert(remote_record != null)
assert(session.peer_supports_capability(
remote_peer_id, SurfaceDrawingProtocol.CAPABILITY
))
var overwrite_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < overwrite_deadline:
await process_frame
var state: Dictionary = service.get_canvas_state(canvas_id)
if int(state.get("revision", 0)) < 2:
continue
var cell: Dictionary = _find_cell(state, 7, 7)
if (
str(cell.get("color_id", "")) == "blue"
and str(cell.get("author_fingerprint", ""))
== remote_record.identity_fingerprint
):
break
var overwritten_state: Dictionary = service.get_canvas_state(canvas_id)
assert(int(overwritten_state["revision"]) >= 2)
var overwritten_cell: Dictionary = _find_cell(overwritten_state, 7, 7)
assert(str(overwritten_cell["color_id"]) == "blue")
assert(
str(overwritten_cell["author_fingerprint"])
== remote_record.identity_fingerprint
)
assert(service.request_cell_edits(canvas_id, [{
"x": 8,
"y": 7,
"color_id": "sunny",
}]))
var undo_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < undo_deadline:
await process_frame
var state: Dictionary = service.get_canvas_state(canvas_id)
if str(_find_cell(state, 7, 7).get("color_id", "")) == "coral":
break
assert(
str(_find_cell(service.get_canvas_state(canvas_id), 7, 7)["color_id"])
== "coral"
)
var guide_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < guide_deadline:
await process_frame
if not bool(service.get_canvas_state(canvas_id).get("guide_visible", true)):
break
assert(not bool(service.get_canvas_state(canvas_id)["guide_visible"]))
# Keep the shared hidden state observable before publishing the restore.
await create_timer(1.0).timeout
assert(service.request_guide_visibility(canvas_id, true))
await create_timer(1.0).timeout
assert(service.request_guide_visibility(canvas_id, false, true))
await create_timer(1.0).timeout
assert(service.clear_session_artwork())
await create_timer(1.0).timeout
print("Surface drawing multiplayer host validation: PASS")
session.disconnect_session("")
main.queue_free()
await process_frame
quit()
func _run_client() -> void:
var main: Node = await _create_initialized_main()
main.call(
"_on_title_join_game_requested",
"127.0.0.1:%d" % TEST_PORT,
)
var session := main.get_node("%NetworkSession") as NetworkSession
var join_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < join_deadline:
await process_frame
if session.state == NetworkSession.State.VERIFYING_SERVER_IDENTITY:
main.call("_confirm_server_trust")
if session.is_joined_client() and bool(main.get("_gameplay_started")):
break
assert(session.is_joined_client())
assert(session.supports_server_capability(
SurfaceDrawingProtocol.CAPABILITY
))
var service := main.get_node(
"%NetworkSurfaceDrawingService"
) as NetworkSurfaceDrawingService
var snapshot_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while (
Time.get_ticks_msec() < snapshot_deadline
and service.get_canvas_ids().is_empty()
):
await process_frame
assert(service.get_canvas_ids().size() == 1)
var canvas_id: String = service.get_canvas_ids()[0]
var snapshot: Dictionary = service.get_canvas_state(canvas_id)
assert(str(_find_cell(snapshot, 7, 7).get("color_id", "")) == "coral")
assert(service.request_cell_edits(canvas_id, [{
"x": 7,
"y": 7,
"color_id": "blue",
}]))
var shared_edit_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < shared_edit_deadline:
await process_frame
var state: Dictionary = service.get_canvas_state(canvas_id)
if str(_find_cell(state, 8, 7).get("color_id", "")) == "sunny":
break
var final_state: Dictionary = service.get_canvas_state(canvas_id)
assert(str(_find_cell(final_state, 7, 7)["color_id"]) == "blue")
assert(str(_find_cell(final_state, 8, 7)["color_id"]) == "sunny")
assert(service.request_undo_last_stroke())
var undo_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < undo_deadline:
await process_frame
var state: Dictionary = service.get_canvas_state(canvas_id)
if str(_find_cell(state, 7, 7).get("color_id", "")) == "coral":
break
assert(
str(_find_cell(service.get_canvas_state(canvas_id), 7, 7)["color_id"])
== "coral"
)
assert(service.request_guide_visibility(canvas_id, false))
var guide_hidden_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < guide_hidden_deadline:
await process_frame
if not bool(service.get_canvas_state(canvas_id).get("guide_visible", true)):
break
assert(not bool(service.get_canvas_state(canvas_id)["guide_visible"]))
var guide_restored_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < guide_restored_deadline:
await process_frame
if bool(service.get_canvas_state(canvas_id).get("guide_visible", false)):
break
assert(bool(service.get_canvas_state(canvas_id)["guide_visible"]))
var finalized_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < finalized_deadline:
await process_frame
if bool(service.get_canvas_state(canvas_id).get("finalized", false)):
break
assert(bool(service.get_canvas_state(canvas_id)["finalized"]))
var reset_deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < reset_deadline:
await process_frame
if service.get_canvas_ids().is_empty():
break
assert(service.get_canvas_ids().is_empty())
print("Surface drawing multiplayer client validation: PASS")
session.disconnect_session("")
main.queue_free()
await process_frame
quit()
func _surface_below_local_player(main: Node) -> Dictionary:
var player := main.get("_player") as Player
var query := PhysicsRayQueryParameters3D.create(
player.global_position + Vector3.UP * 3.0,
player.global_position + Vector3.DOWN * 6.0,
1,
)
query.collide_with_areas = false
query.collide_with_bodies = true
query.exclude = [player.get_rid()]
return player.get_world_3d().direct_space_state.intersect_ray(query)
func _wait_for_remote_peer(session: NetworkSession) -> int:
var deadline: int = Time.get_ticks_msec() + WAIT_MSEC
while Time.get_ticks_msec() < deadline:
await process_frame
for peer_id: int in session.get_authenticated_peer_ids():
if peer_id != session.get_local_peer_id():
return peer_id
return 0
func _find_cell(state: Dictionary, x: int, y: int) -> Dictionary:
for value: Variant in state.get("cells", []):
if typeof(value) != TYPE_DICTIONARY:
continue
var cell: Dictionary = value
if int(cell.get("x", -1)) == x and int(cell.get("y", -1)) == y:
return cell
return {}
func _create_initialized_main() -> Node:
root.size = Vector2i(1280, 720)
var main: Node = MainScene.instantiate()
root.add_child(main)
for _frame: int in 4:
await process_frame
if not bool(main.get("_application_initialized")):
main.call("_activate_selected_data_path", "", true)
for _frame: int in 8:
await process_frame
assert(bool(main.get("_application_initialized")))
return main

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extends SceneTree
const MainScene: PackedScene = preload("res://main/main.tscn")
const TEST_PORT: int = 18132
func _initialize() -> void:
call_deferred("_run")
func _run() -> void:
root.size = Vector2i(1280, 720)
var main: Node = MainScene.instantiate()
root.add_child(main)
for _frame: int in 4:
await process_frame
if not bool(main.get("_application_initialized")):
main.call("_activate_selected_data_path", "", true)
for _frame: int in 8:
await process_frame
assert(bool(main.get("_application_initialized")))
var session := main.get_node("%NetworkSession") as NetworkSession
assert(session.start_private_host(TEST_PORT))
var save_manager := main.get("_save_manager") as PlayerSaveManager
assert(save_manager.initialize_new_game())
main.call("_enter_gameplay")
await physics_frame
await physics_frame
var player := main.get("_player") as Player
var service := main.get_node(
"%NetworkSurfaceDrawingService"
) as NetworkSurfaceDrawingService
assert(service != null)
assert(session.supports_server_capability(SurfaceDrawingProtocol.CAPABILITY))
_validate_marker_controls(service, player)
var query := PhysicsRayQueryParameters3D.create(
player.global_position + Vector3.UP * 3.0,
player.global_position + Vector3.DOWN * 6.0,
1,
)
query.collide_with_areas = false
query.collide_with_bodies = true
query.exclude = [player.get_rid()]
var hit: Dictionary = player.get_world_3d().direct_space_state.intersect_ray(query)
assert(not hit.is_empty())
assert(service.request_canvas_at_surface(
hit["position"], hit["normal"], Vector3.RIGHT
))
assert(service.get_canvas_ids().size() == 1)
var canvas_id: String = service.get_canvas_ids()[0]
assert(service.request_cell_edits(canvas_id, [{
"x": 8,
"y": 8,
"color_id": "ocean_teal",
}]))
var state: Dictionary = service.get_canvas_state(canvas_id)
assert(int(state["revision"]) == 1)
assert((state["cells"] as Array).size() == 1)
assert(state["cells"][0]["color_id"] == "ocean_teal")
assert(
state["cells"][0]["author_fingerprint"]
== session.get_local_identity_fingerprint()
)
assert(service.request_guide_visibility(canvas_id, false))
state = service.get_canvas_state(canvas_id)
assert(not bool(state["guide_visible"]))
var canvas_nodes: Dictionary = service.get("_canvas_nodes")
var canvas := canvas_nodes[canvas_id] as SurfaceDrawingCanvas
assert(not canvas.is_guide_visible())
assert(service.request_guide_visibility(canvas_id, true))
assert(bool(service.get_canvas_state(canvas_id)["guide_visible"]))
assert(service.request_guide_visibility(canvas_id, false, true))
assert(bool(service.get_canvas_state(canvas_id)["finalized"]))
assert(canvas.is_finalized())
assert(service.request_canvas_at_surface(
hit["position"], hit["normal"], Vector3.RIGHT
))
assert(service.get_canvas_ids().size() == 2)
var replacement_canvas_id: String = ""
for candidate_id: String in service.get_canvas_ids():
if candidate_id != canvas_id:
replacement_canvas_id = candidate_id
assert(not replacement_canvas_id.is_empty())
assert(service.request_cell_edits(replacement_canvas_id, [{
"x": 8,
"y": 8,
"color_id": "blue",
}]))
assert((service.get_canvas_state(canvas_id)["cells"] as Array).is_empty())
assert(
str(service.get_canvas_state(replacement_canvas_id)["cells"][0]["color_id"])
== "blue"
)
assert(service.request_undo_last_stroke())
assert((service.get_canvas_state(replacement_canvas_id)["cells"] as Array).is_empty())
assert(
str(service.get_canvas_state(canvas_id)["cells"][0]["color_id"])
== "ocean_teal"
)
var player_list := main.get_node(
"%NetworkPlayerListService"
) as NetworkPlayerListService
assert(player_list.get_session_artwork_counts() == Vector2i(2, 1))
assert(player_list.reset_session_artwork())
assert(service.get_canvas_ids().is_empty())
print("Surface drawing runtime validation: PASS")
session.disconnect_session("")
main.queue_free()
await process_frame
quit()
func _validate_marker_controls(
service: NetworkSurfaceDrawingService,
player: Player,
) -> void:
var prior_mouse_mode: Input.MouseMode = Input.mouse_mode
service.activate()
assert(service.is_active())
assert(not service.is_placement_mode())
if DisplayServer.get_name() != "headless":
assert(Input.mouse_mode == Input.MOUSE_MODE_CAPTURED)
var placement_key := InputEventKey.new()
placement_key.physical_keycode = KEY_R
placement_key.pressed = true
assert(service.handle_input(placement_key, true))
assert(service.is_placement_mode())
var pointer_before: Vector2 = service.get_pointer_screen_position()
var pointer_motion := InputEventMouseMotion.new()
pointer_motion.screen_relative = Vector2(30.0, -12.0)
assert(service.handle_input(pointer_motion, true))
assert(service.get_pointer_screen_position() != pointer_before)
var zoom_event := InputEventMouseButton.new()
zoom_event.button_index = MOUSE_BUTTON_WHEEL_UP
zoom_event.shift_pressed = true
zoom_event.pressed = true
assert(not service.handle_input(zoom_event, true))
var prior_zoom: float = float(player.get("_target_zoom"))
player.call("_unhandled_input", zoom_event)
assert(float(player.get("_target_zoom")) < prior_zoom)
var camera_press := InputEventMouseButton.new()
camera_press.button_index = MOUSE_BUTTON_RIGHT
camera_press.pressed = true
assert(not service.handle_input(camera_press, true))
var pointer_before_camera: Vector2 = service.get_pointer_screen_position()
assert(not service.handle_input(pointer_motion, true))
assert(service.get_pointer_screen_position() == pointer_before_camera)
var camera_release := InputEventMouseButton.new()
camera_release.button_index = MOUSE_BUTTON_RIGHT
camera_release.pressed = false
assert(not service.handle_input(camera_release, true))
assert(service.handle_input(placement_key, true))
assert(not service.is_placement_mode())
service.deactivate()
assert(Input.mouse_mode == prior_mouse_mode)

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extends SceneTree
const FINGERPRINT_A: String = (
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
)
const FINGERPRINT_B: String = (
"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
)
func _initialize() -> void:
call_deferred("_run")
func _run() -> void:
_validate_palette()
_validate_protocol_bounds()
_validate_grid_snapping()
await _validate_canvas_geometry_and_collaboration()
await _validate_blocked_author_visibility()
_validate_peer_capability_tracking()
print("Surface drawing validation: PASS")
quit()
func _validate_palette() -> void:
var ids: Array[StringName] = SurfaceDrawingPalette.get_color_ids()
assert(ids.size() == 8)
assert(ids.front() == SurfaceDrawingPalette.DEFAULT_COLOR_ID)
for color_id: StringName in ids:
assert(SurfaceDrawingPalette.has_color(color_id))
assert(not SurfaceDrawingPalette.get_display_name(color_id).is_empty())
assert(
SurfaceDrawingPalette.filter_unlocked_ids([])
== [SurfaceDrawingPalette.DEFAULT_COLOR_ID]
)
func _validate_protocol_bounds() -> void:
assert(SurfaceDrawingProtocol.GRID_WIDTH == 32)
assert(SurfaceDrawingProtocol.GRID_HEIGHT == 32)
assert(is_equal_approx(SurfaceDrawingProtocol.CELL_SIZE, 0.075))
assert(is_equal_approx(
float(SurfaceDrawingProtocol.GRID_WIDTH)
* SurfaceDrawingProtocol.CELL_SIZE,
2.4,
))
var canvas_request: Dictionary = {
"request_id": "canvas-1",
"session_id": "session",
"origin": [0.0, 1.0, 2.0],
"normal": [0.0, 1.0, 0.0],
"tangent": [1.0, 0.0, 0.0],
"width": SurfaceDrawingProtocol.GRID_WIDTH,
"height": SurfaceDrawingProtocol.GRID_HEIGHT,
"cell_size": SurfaceDrawingProtocol.CELL_SIZE,
}
assert(SurfaceDrawingProtocol.validate_canvas_request(canvas_request))
var malformed: Dictionary = canvas_request.duplicate(true)
malformed["origin"] = [INF, 0.0, 0.0]
assert(not SurfaceDrawingProtocol.validate_canvas_request(malformed))
var edit_request: Dictionary = {
"request_id": "edit-1",
"session_id": "session",
"canvas_id": "canvas-1",
"stroke_id": "stroke-1",
"edits": [{"x": 0, "y": 0, "color_id": "ocean_teal"}],
}
assert(SurfaceDrawingProtocol.validate_edit_request(edit_request))
edit_request["edits"] = [{
"x": SurfaceDrawingProtocol.GRID_WIDTH,
"y": 0,
"color_id": "ocean_teal",
}]
assert(not SurfaceDrawingProtocol.validate_edit_request(edit_request))
var guide_request: Dictionary = {
"request_id": "guide-1",
"session_id": "session",
"canvas_id": "canvas-1",
"guide_visible": false,
"finalized": false,
}
assert(SurfaceDrawingProtocol.validate_guide_request(guide_request))
guide_request["guide_visible"] = 0
assert(not SurfaceDrawingProtocol.validate_guide_request(guide_request))
var undo_request: Dictionary = {
"request_id": "undo-1",
"session_id": "session",
"stroke_id": "stroke-1",
}
assert(SurfaceDrawingProtocol.validate_undo_request(undo_request))
func _validate_grid_snapping() -> void:
var anchor: Dictionary = {
"session_id": "session",
"canvas_id": "anchor",
"origin": [0.0, 0.0, 0.0],
"normal": [0.0, 1.0, 0.0],
"tangent": [1.0, 0.0, 0.0],
"width": SurfaceDrawingProtocol.GRID_WIDTH,
"height": SurfaceDrawingProtocol.GRID_HEIGHT,
"cell_size": SurfaceDrawingProtocol.CELL_SIZE,
"revision": 0,
"guide_visible": false,
"finalized": true,
"layer": 1,
"creator_fingerprint": FINGERPRINT_A,
"cells": [],
}
var snapped: Dictionary = SurfaceDrawingPlacement.resolve(
Vector3(2.28, 0.02, 0.08),
Vector3.UP,
Vector3.RIGHT,
[anchor],
)
assert(bool(snapped["snapped"]))
var snapped_origin: Vector3 = snapped["origin"]
assert(snapped_origin.is_equal_approx(Vector3(2.4, 0.0, 0.0)))
var unsnapped: Dictionary = SurfaceDrawingPlacement.resolve(
Vector3(1.2, 0.0, 0.0),
Vector3.UP,
Vector3.RIGHT,
[anchor],
)
assert(not bool(unsnapped["snapped"]))
func _validate_canvas_geometry_and_collaboration() -> void:
var world := Node3D.new()
root.add_child(world)
var canvas := SurfaceDrawingCanvas.new()
world.add_child(canvas)
var state: Dictionary = {
"session_id": "session",
"canvas_id": "canvas-1",
"origin": [0.0, 0.0, 0.0],
"normal": [0.0, 1.0, 0.0],
"tangent": [1.0, 0.0, 0.0],
"width": SurfaceDrawingProtocol.GRID_WIDTH,
"height": SurfaceDrawingProtocol.GRID_HEIGHT,
"cell_size": SurfaceDrawingProtocol.CELL_SIZE,
"revision": 0,
"creator_fingerprint": FINGERPRINT_A,
"cells": [],
}
assert(canvas.setup(state, null))
var first_center: Vector3 = canvas.get_cell_world_position(0, 0)
assert(canvas.cell_at_world_point(first_center) == Vector2i(0, 0))
assert(canvas.contains_world_point(first_center))
var first_update: Dictionary = {
"session_id": "session",
"canvas_id": "canvas-1",
"revision": 1,
"edits": [{
"x": 3,
"y": 4,
"color_id": "coral",
"author_fingerprint": FINGERPRINT_A,
}],
}
assert(canvas.apply_update(first_update))
var finish_update: Dictionary = {
"session_id": "session",
"canvas_id": "canvas-1",
"revision": 2,
"guide_visible": false,
"finalized": true,
}
assert(canvas.apply_guide_update(finish_update))
assert(not canvas.is_guide_visible())
assert(canvas.is_finalized())
await process_frame
var finished_pixel_scale: float = canvas.get_rendered_pixel_size()
assert(
is_equal_approx(
finished_pixel_scale, SurfaceDrawingProtocol.CELL_SIZE
),
"finished pixel scale %f does not match cell size %f"
% [finished_pixel_scale, SurfaceDrawingProtocol.CELL_SIZE],
)
var second_update: Dictionary = {
"session_id": "session",
"canvas_id": "canvas-1",
"revision": 3,
"edits": [{
"x": 3,
"y": 4,
"color_id": "blue",
"author_fingerprint": FINGERPRINT_B,
}],
}
assert(canvas.apply_update(second_update))
var cells: Array[Dictionary] = canvas.get_authoritative_cells()
assert(cells.size() == 1)
assert(cells[0]["color_id"] == "blue")
assert(cells[0]["author_fingerprint"] == FINGERPRINT_B)
var erase_update: Dictionary = {
"session_id": "session",
"canvas_id": "canvas-1",
"revision": 4,
"edits": [{
"x": 3,
"y": 4,
"color_id": "",
"author_fingerprint": "",
}],
}
assert(canvas.apply_update(erase_update))
assert(canvas.get_authoritative_cells().is_empty())
world.queue_free()
await process_frame
func _validate_peer_capability_tracking() -> void:
var registry := PeerRegistry.new()
assert(registry.add_peer(
1,
"profile",
"Voyager",
NetworkProtocol.PROTOCOL_VERSION,
FINGERPRINT_A,
"public key fixture",
PackedStringArray([str(SurfaceDrawingProtocol.CAPABILITY)]),
))
var record: PeerRegistry.PeerRecord = registry.get_peer(1)
assert(record != null)
assert(str(SurfaceDrawingProtocol.CAPABILITY) in record.capability_flags)
func _validate_blocked_author_visibility() -> void:
var relationships := PlayerRelationshipStore.new()
relationships.set("_loaded", true)
relationships.set("_records", {
FINGERPRINT_B: {"blocked": true, "muted": true},
})
var world := Node3D.new()
root.add_child(world)
var canvas := SurfaceDrawingCanvas.new()
world.add_child(canvas)
var state: Dictionary = {
"session_id": "session",
"canvas_id": "blocked-author-canvas",
"origin": [0.0, 0.0, 0.0],
"normal": [0.0, 1.0, 0.0],
"tangent": [1.0, 0.0, 0.0],
"width": SurfaceDrawingProtocol.GRID_WIDTH,
"height": SurfaceDrawingProtocol.GRID_HEIGHT,
"cell_size": SurfaceDrawingProtocol.CELL_SIZE,
"revision": 1,
"creator_fingerprint": FINGERPRINT_A,
"cells": [
{
"x": 1,
"y": 1,
"color_id": "coral",
"author_fingerprint": FINGERPRINT_A,
},
{
"x": 2,
"y": 1,
"color_id": "blue",
"author_fingerprint": FINGERPRINT_B,
},
],
}
assert(canvas.setup(state, relationships))
assert(_rendered_pixel_count(canvas) == 1)
relationships.set("_records", {})
canvas.refresh_relationship_visibility()
await process_frame
assert(_rendered_pixel_count(canvas) == 2)
world.queue_free()
await process_frame
func _rendered_pixel_count(canvas: SurfaceDrawingCanvas) -> int:
var count: int = 0
for child: Node in canvas.get_children():
if child is MultiMeshInstance3D:
var instance := child as MultiMeshInstance3D
if instance.multimesh != null:
count += instance.multimesh.instance_count
return count

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uid://dui5ueufqooul