Render bathymetric sonar surface

game/presentation/cockpit/cockpit_interior.tscn

@@ -388,11 +388,12 @@ mesh = SubResource("KnobMesh")
 material_override = SubResource("BrassMaterial")
 
 [node name="SonarMonitor" type="Node3D" parent="."]
-position = Vector3(0.74, 0.42, -1.18)
-rotation_degrees = Vector3(-5, -22, -2)
+position = Vector3(0.54, 0.59, -1.04)
+rotation_degrees = Vector3(-5, -42, -2)
+scale = Vector3(0.6, 0.6, 0.6)
 
 [node name="Housing" type="MeshInstance3D" parent="SonarMonitor"]
-scale = Vector3(0.5, 0.34, 0.1)
+scale = Vector3(0.6, 0.37, 0.1)
 mesh = SubResource("UnitBoxMesh")
 material_override = SubResource("PaintedMaterial")
 

game/presentation/cockpit/cockpit_material_palette.gd

@@ -38,7 +38,6 @@ var indicator_green: StandardMaterial3D
 var indicator_amber: StandardMaterial3D
 var indicator_red: StandardMaterial3D
 var sonar_grid: StandardMaterial3D
-var sonar_trace: StandardMaterial3D
 var warm_glass: StandardMaterial3D
 
 
@@ -94,7 +93,6 @@ func _init() -> void:
 	indicator_amber = _emissive_material(Color(1.0, 0.43, 0.035), 2.8)
 	indicator_red = _emissive_material(Color(0.9, 0.045, 0.018), 2.8)
 	sonar_grid = _emissive_material(Color(0.02, 0.20, 0.22), 0.55)
-	sonar_trace = _emissive_material(Color(0.12, 0.78, 0.78), 1.8)
 	warm_glass = _warm_glass_material()
 
 

game/presentation/cockpit/cockpit_sonar_console.gd

@@ -16,7 +16,7 @@ func _init(materials: CockpitMaterialPalette) -> void:
 	_materials = materials
 	name = "SonarConsoleDetailing"
 	_build_bezel()
-	_build_graticule()
+	_build_grid()
 	_build_control_strip()
 	_build_mounting_hardware()
 
@@ -100,7 +100,7 @@ func _build_control_strip() -> void:
 	_control_count += 1
 
 
-func _build_graticule() -> void:
+func _build_grid() -> void:
 	for x: float in [-0.145, -0.085, -0.025, 0.035, 0.095]:
 		CockpitMeshFactory.add_box(
 			"SonarGridVertical",
@@ -117,24 +117,6 @@ func _build_graticule() -> void:
 			Vector3(0.33, 0.0015, 0.002),
 			_materials.sonar_grid
 		)
-	var trace_points: Array[Vector3] = [
-		Vector3(-0.185, -0.035, 0.080),
-		Vector3(-0.135, -0.020, 0.080),
-		Vector3(-0.085, -0.055, 0.080),
-		Vector3(-0.030, -0.005, 0.080),
-		Vector3(0.025, -0.030, 0.080),
-		Vector3(0.075, 0.030, 0.080),
-		Vector3(0.125, 0.075, 0.080),
-	]
-	for point_index in trace_points.size() - 1:
-		CockpitMeshFactory.add_cylinder_between(
-			"SonarReferenceTrace",
-			self,
-			trace_points[point_index],
-			trace_points[point_index + 1],
-			0.0025,
-			_materials.sonar_trace
-		)
 
 
 func _build_mounting_hardware() -> void:

game/presentation/sonar/sonar_display.gd

@@ -53,6 +53,18 @@ func built_row_count() -> int:
 	return _renderer.built_row_count()
 
 
+func built_triangle_count() -> int:
+	return _renderer.built_triangle_count()
+
+
+func built_grid_segment_count() -> int:
+	return _renderer.built_grid_segment_count()
+
+
+func idle_prompt_visible() -> bool:
+	return _renderer.idle_prompt_visible()
+
+
 func status_text() -> String:
 	return _status_label.text
 

game/presentation/sonar/sonar_relief_mesh_builder.gd

@@ -0,0 +1,151 @@
+class_name SonarReliefMeshBuilder
+extends RefCounted
+
+const SonarMaterial = preload("res://game/domain/sonar/sonar_material.gd")
+const SonarSample = preload("res://game/domain/sonar/sonar_sample.gd")
+const SonarScan = preload("res://game/domain/sonar/sonar_scan.gd")
+
+const COLOR_DEEP := Color("173f91")
+const COLOR_LOW := Color("168fc1")
+const COLOR_MIDDLE := Color("36b979")
+const COLOR_HIGH := Color("d7d93d")
+const COLOR_PEAK := Color("ee5734")
+const COLOR_METAL := Color("ff6b22")
+
+
+static func build_full_mesh(
+	scan: SonarScan,
+	material: StandardMaterial3D
+) -> ArrayMesh:
+	var mesh := ArrayMesh.new()
+	for row in range(1, scan.samples.rows):
+		add_row_band(mesh, scan, row, material)
+	return mesh
+
+
+static func add_row_band(
+	mesh: ArrayMesh,
+	scan: SonarScan,
+	row: int,
+	material: StandardMaterial3D
+) -> int:
+	var vertices := PackedVector3Array()
+	var normals := PackedVector3Array()
+	var colors := PackedColorArray()
+	for column in range(scan.samples.columns - 1):
+		var top_left: SonarSample = scan.samples.sample_at(row - 1, column)
+		var top_right: SonarSample = scan.samples.sample_at(row - 1, column + 1)
+		var bottom_left: SonarSample = scan.samples.sample_at(row, column)
+		var bottom_right: SonarSample = scan.samples.sample_at(row, column + 1)
+		if not (
+			top_left.observed
+			and top_right.observed
+			and bottom_left.observed
+			and bottom_right.observed
+		):
+			continue
+		_append_triangle(
+			vertices, normals, colors, scan,
+			top_left, bottom_left, top_right
+		)
+		_append_triangle(
+			vertices, normals, colors, scan,
+			top_right, bottom_left, bottom_right
+		)
+	if vertices.is_empty():
+		return 0
+	var arrays: Array = []
+	arrays.resize(Mesh.ARRAY_MAX)
+	arrays[Mesh.ARRAY_VERTEX] = vertices
+	arrays[Mesh.ARRAY_NORMAL] = normals
+	arrays[Mesh.ARRAY_COLOR] = colors
+	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, arrays)
+	mesh.surface_set_material(mesh.get_surface_count() - 1, material)
+	return vertices.size() / 3
+
+
+static func add_grid_band(
+	mesh: ArrayMesh,
+	scan: SonarScan,
+	row: int,
+	material: StandardMaterial3D
+) -> int:
+	var vertices := PackedVector3Array()
+	for column in scan.samples.columns:
+		if column % 6 != 0 and column != scan.samples.columns - 1:
+			continue
+		_append_grid_segment(
+			vertices,
+			scan.samples.sample_at(row - 1, column),
+			scan.samples.sample_at(row, column)
+		)
+	if row == 1 or row % 4 == 0 or row == scan.samples.rows - 1:
+		for column in range(scan.samples.columns - 1):
+			_append_grid_segment(
+				vertices,
+				scan.samples.sample_at(row, column),
+				scan.samples.sample_at(row, column + 1)
+			)
+	if vertices.is_empty():
+		return 0
+	var arrays: Array = []
+	arrays.resize(Mesh.ARRAY_MAX)
+	arrays[Mesh.ARRAY_VERTEX] = vertices
+	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_LINES, arrays)
+	mesh.surface_set_material(mesh.get_surface_count() - 1, material)
+	return vertices.size() / 2
+
+
+static func _append_grid_segment(
+	vertices: PackedVector3Array,
+	a: SonarSample,
+	b: SonarSample
+) -> void:
+	if not a.observed or not b.observed:
+		return
+	vertices.append(a.position_m + a.normal * 0.08)
+	vertices.append(b.position_m + b.normal * 0.08)
+
+
+static func _append_triangle(
+	vertices: PackedVector3Array,
+	normals: PackedVector3Array,
+	colors: PackedColorArray,
+	scan: SonarScan,
+	a: SonarSample,
+	b: SonarSample,
+	c: SonarSample
+) -> void:
+	for sample: SonarSample in [a, b, c]:
+		vertices.append(sample.position_m)
+		normals.append(sample.normal)
+		colors.append(_sample_color(scan, sample))
+
+
+static func _sample_color(scan: SonarScan, sample: SonarSample) -> Color:
+	if sample.material == SonarMaterial.Value.METAL:
+		return COLOR_METAL
+	var height := inverse_lerp(
+		scan.minimum_elevation_m,
+		scan.maximum_elevation_m,
+		sample.elevation_m
+	)
+	var color: Color
+	if height <= 0.28:
+		color = COLOR_DEEP.lerp(COLOR_LOW, height / 0.28)
+	elif height <= 0.52:
+		color = COLOR_LOW.lerp(COLOR_MIDDLE, (height - 0.28) / 0.24)
+	elif height <= 0.76:
+		color = COLOR_MIDDLE.lerp(COLOR_HIGH, (height - 0.52) / 0.24)
+	else:
+		color = COLOR_HIGH.lerp(COLOR_PEAK, (height - 0.76) / 0.24)
+	var light_direction := Vector3(-0.35, 0.82, -0.45).normalized()
+	var slope_light := clampf(sample.normal.dot(light_direction), 0.0, 1.0)
+	var shade := lerpf(0.68, 1.0, slope_light)
+	var lit_color := color.lerp(Color.WHITE, sample.intensity * 0.08)
+	return Color(
+		lit_color.r * shade,
+		lit_color.g * shade,
+		lit_color.b * shade,
+		lit_color.a
+	)

game/presentation/sonar/sonar_relief_renderer.gd

@@ -1,25 +1,24 @@
 class_name BathymetricSonarRenderer
 extends SubViewport
 
-const SonarMaterial = preload("res://game/domain/sonar/sonar_material.gd")
-const SonarSample = preload("res://game/domain/sonar/sonar_sample.gd")
 const SonarScan = preload("res://game/domain/sonar/sonar_scan.gd")
-
-const COLOR_DEEP := Color("173f91")
-const COLOR_LOW := Color("168fc1")
-const COLOR_MIDDLE := Color("36b979")
-const COLOR_HIGH := Color("d7d93d")
-const COLOR_PEAK := Color("ee5734")
-const COLOR_METAL := Color("ff6b22")
+const SonarReliefMeshBuilder = preload(
+	"res://game/presentation/sonar/sonar_relief_mesh_builder.gd"
+)
 
 var _current_mesh_instance: MeshInstance3D
+var _current_grid_instance: MeshInstance3D
 var _previous_mesh_instance: MeshInstance3D
 var _contact_root: Node3D
+var _idle_prompt: Label
 var _current_material: StandardMaterial3D
+var _grid_material: StandardMaterial3D
 var _previous_material: StandardMaterial3D
 var _current_scan_id: StringName = &""
 var _previous_scan_id: StringName = &""
 var _built_current_rows := 0
+var _built_current_triangle_count := 0
+var _built_current_grid_segment_count := 0
 
 
 func _ready() -> void:
@@ -38,10 +37,14 @@ func present(
 ) -> void:
 	if current_scan == null:
 		return
+	_idle_prompt.visible = false
 	if current_scan.scan_id != _current_scan_id:
 		_current_scan_id = current_scan.scan_id
 		_current_mesh_instance.mesh = ArrayMesh.new()
+		_current_grid_instance.mesh = ArrayMesh.new()
 		_built_current_rows = 0
+		_built_current_triangle_count = 0
+		_built_current_grid_segment_count = 0
 		_rebuild_contacts(current_scan)
 	_build_current_rows(current_scan, clampi(visible_rows, 0, current_scan.samples.rows))
 	_update_contact_visibility(current_scan, visible_rows)
@@ -54,7 +57,7 @@ func present(
 		_previous_mesh_instance.visible = previous_opacity > 0.0
 		if previous_scan.scan_id != _previous_scan_id:
 			_previous_scan_id = previous_scan.scan_id
-			_previous_mesh_instance.mesh = _build_full_mesh(
+			_previous_mesh_instance.mesh = SonarReliefMeshBuilder.build_full_mesh(
 				previous_scan,
 				_previous_material
 			)
@@ -69,6 +72,18 @@ func built_row_count() -> int:
 	return _built_current_rows
 
 
+func built_triangle_count() -> int:
+	return _built_current_triangle_count
+
+
+func built_grid_segment_count() -> int:
+	return _built_current_grid_segment_count
+
+
+func idle_prompt_visible() -> bool:
+	return _idle_prompt != null and _idle_prompt.visible
+
+
 func visible_contact_count() -> int:
 	var count := 0
 	for child: Node in _contact_root.get_children():
@@ -89,11 +104,16 @@ func _build_render_world() -> void:
 	add_child(environment_node)
 
 	_current_material = _relief_material(false)
+	_grid_material = _surface_grid_material()
 	_previous_material = _relief_material(true)
 	_current_mesh_instance = MeshInstance3D.new()
 	_current_mesh_instance.name = "CurrentRelief"
 	_current_mesh_instance.mesh = ArrayMesh.new()
 	add_child(_current_mesh_instance)
+	_current_grid_instance = MeshInstance3D.new()
+	_current_grid_instance.name = "CurrentReliefGrid"
+	_current_grid_instance.mesh = ArrayMesh.new()
+	add_child(_current_grid_instance)
 	_previous_mesh_instance = MeshInstance3D.new()
 	_previous_mesh_instance.name = "PreviousRelief"
 	_previous_mesh_instance.mesh = ArrayMesh.new()
@@ -112,7 +132,7 @@ func _build_render_world() -> void:
 	camera.far = 240.0
 	camera.position = Vector3(0.0, 65.0, -30.0)
 	add_child(camera)
-	camera.look_at(Vector3(0.0, -10.0, 60.0), Vector3.UP)
+	camera.look_at(Vector3(0.0, -38.0, 58.0), Vector3.UP)
 	camera.current = true
 
 	var key_light := DirectionalLight3D.new()
@@ -124,6 +144,22 @@ func _build_render_world() -> void:
 	fill_light.rotation_degrees = Vector3(-28.0, 145.0, 18.0)
 	fill_light.light_energy = 0.38
 	add_child(fill_light)
+	_build_idle_prompt()
+
+
+func _build_idle_prompt() -> void:
+	_idle_prompt = Label.new()
+	_idle_prompt.name = "IdlePrompt"
+	_idle_prompt.position = Vector2(180.0, 238.0)
+	_idle_prompt.size = Vector2(600.0, 64.0)
+	_idle_prompt.text = "SONAR PRÊT · F POUR ÉMETTRE"
+	_idle_prompt.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	_idle_prompt.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
+	_idle_prompt.add_theme_font_size_override("font_size", 26)
+	_idle_prompt.add_theme_color_override("font_color", Color(0.38, 0.88, 0.86))
+	_idle_prompt.add_theme_color_override("font_outline_color", Color(0.0, 0.04, 0.05))
+	_idle_prompt.add_theme_constant_override("outline_size", 6)
+	add_child(_idle_prompt)
 
 
 func _relief_material(transparent: bool) -> StandardMaterial3D:
@@ -137,108 +173,31 @@ func _relief_material(transparent: bool) -> StandardMaterial3D:
 	return material
 
 
+func _surface_grid_material() -> StandardMaterial3D:
+	var material := StandardMaterial3D.new()
+	material.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
+	material.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+	material.albedo_color = Color(0.32, 0.95, 0.91, 0.34)
+	material.emission_enabled = true
+	material.emission = Color(0.18, 0.78, 0.76)
+	material.emission_energy_multiplier = 1.35
+	return material
+
+
 func _build_current_rows(scan: SonarScan, visible_rows: int) -> void:
 	var mesh := _current_mesh_instance.mesh as ArrayMesh
+	var grid_mesh := _current_grid_instance.mesh as ArrayMesh
 	while _built_current_rows < visible_rows:
 		if _built_current_rows > 0:
-			_add_row_band(mesh, scan, _built_current_rows, _current_material)
+			_built_current_triangle_count += SonarReliefMeshBuilder.add_row_band(
+				mesh, scan, _built_current_rows, _current_material
+			)
+			_built_current_grid_segment_count += SonarReliefMeshBuilder.add_grid_band(
+				grid_mesh, scan, _built_current_rows, _grid_material
+			)
 		_built_current_rows += 1
 
 
-func _build_full_mesh(
-	scan: SonarScan,
-	material: StandardMaterial3D
-) -> ArrayMesh:
-	var mesh := ArrayMesh.new()
-	for row in range(1, scan.samples.rows):
-		_add_row_band(mesh, scan, row, material)
-	return mesh
-
-
-func _add_row_band(
-	mesh: ArrayMesh,
-	scan: SonarScan,
-	row: int,
-	material: StandardMaterial3D
-) -> void:
-	var vertices := PackedVector3Array()
-	var normals := PackedVector3Array()
-	var colors := PackedColorArray()
-	for column in range(scan.samples.columns - 1):
-		var top_left: SonarSample = scan.samples.sample_at(row - 1, column)
-		var top_right: SonarSample = scan.samples.sample_at(row - 1, column + 1)
-		var bottom_left: SonarSample = scan.samples.sample_at(row, column)
-		var bottom_right: SonarSample = scan.samples.sample_at(row, column + 1)
-		if not (
-			top_left.observed
-			and top_right.observed
-			and bottom_left.observed
-			and bottom_right.observed
-		):
-			continue
-		_append_triangle(
-			vertices, normals, colors, scan,
-			top_left, bottom_left, top_right
-		)
-		_append_triangle(
-			vertices, normals, colors, scan,
-			top_right, bottom_left, bottom_right
-		)
-	if vertices.is_empty():
-		return
-	var arrays: Array = []
-	arrays.resize(Mesh.ARRAY_MAX)
-	arrays[Mesh.ARRAY_VERTEX] = vertices
-	arrays[Mesh.ARRAY_NORMAL] = normals
-	arrays[Mesh.ARRAY_COLOR] = colors
-	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, arrays)
-	mesh.surface_set_material(mesh.get_surface_count() - 1, material)
-
-
-func _append_triangle(
-	vertices: PackedVector3Array,
-	normals: PackedVector3Array,
-	colors: PackedColorArray,
-	scan: SonarScan,
-	a: SonarSample,
-	b: SonarSample,
-	c: SonarSample
-) -> void:
-	for sample: SonarSample in [a, b, c]:
-		vertices.append(sample.position_m)
-		normals.append(sample.normal)
-		colors.append(_sample_color(scan, sample))
-
-
-func _sample_color(scan: SonarScan, sample: SonarSample) -> Color:
-	if sample.material == SonarMaterial.Value.METAL:
-		return COLOR_METAL
-	var height := inverse_lerp(
-		scan.minimum_elevation_m,
-		scan.maximum_elevation_m,
-		sample.elevation_m
-	)
-	var color: Color
-	if height <= 0.28:
-		color = COLOR_DEEP.lerp(COLOR_LOW, height / 0.28)
-	elif height <= 0.52:
-		color = COLOR_LOW.lerp(COLOR_MIDDLE, (height - 0.28) / 0.24)
-	elif height <= 0.76:
-		color = COLOR_MIDDLE.lerp(COLOR_HIGH, (height - 0.52) / 0.24)
-	else:
-		color = COLOR_HIGH.lerp(COLOR_PEAK, (height - 0.76) / 0.24)
-	var light_direction := Vector3(-0.35, 0.82, -0.45).normalized()
-	var slope_light := clampf(sample.normal.dot(light_direction), 0.0, 1.0)
-	var shade := lerpf(0.68, 1.0, slope_light)
-	var lit_color := color.lerp(Color.WHITE, sample.intensity * 0.08)
-	return Color(
-		lit_color.r * shade,
-		lit_color.g * shade,
-		lit_color.b * shade,
-		lit_color.a
-	)
-
-
 func _rebuild_contacts(scan: SonarScan) -> void:
 	for child: Node in _contact_root.get_children():
 		_contact_root.remove_child(child)
@@ -253,9 +212,9 @@ func _rebuild_contacts(scan: SonarScan) -> void:
 		marker.set_meta("forward_distance_m", contact.center_m.z)
 		var material := StandardMaterial3D.new()
 		material.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
-		material.albedo_color = COLOR_METAL
+		material.albedo_color = SonarReliefMeshBuilder.COLOR_METAL
 		material.emission_enabled = true
-		material.emission = COLOR_METAL
+		material.emission = SonarReliefMeshBuilder.COLOR_METAL
 		material.emission_energy_multiplier = 4.0
 		marker.material_override = material
 		_contact_root.add_child(marker)

tests/integration/run_vertical_slice_foundation.gd

@@ -19,7 +19,7 @@ const ProductionInputAdapter = preload(
 	"res://game/infrastructure/input/production_input_adapter.gd"
 )
 
-const TEST_COUNT := 69
+const TEST_COUNT := 78
 
 var _failures: Array[String] = []
 
@@ -125,6 +125,28 @@ func _test_vehicle_slice(composition: VerticalSliceRoot) -> void:
 	_expect(instruments.get_node("%WindowFrame") is MeshInstance3D, "cockpit has a physical porthole frame")
 	_expect(instruments.get_node("%Dashboard") is Node3D, "cockpit has a physical dashboard")
 	_expect(instruments.get_node("%SonarScreen") is MeshInstance3D, "cockpit reserves a physical sonar display")
+	var sonar_monitor := instruments.get_node("SonarMonitor") as Node3D
+	var sonar_screen := instruments.get_node("%SonarScreen") as MeshInstance3D
+	var sonar_housing := instruments.get_node("SonarMonitor/Housing") as MeshInstance3D
+	var cockpit_camera := camera.get_node("Camera") as Camera3D
+	var electrical_bank := detailing.get_node("SideEquipment/ElectricalBank") as Node3D
+	_expect(sonar_monitor.position.x > 0.5, "cockpit sonar is mounted on the right side")
+	_expect(
+		_sonar_screen_faces_camera(sonar_screen, cockpit_camera),
+		"right-side sonar display faces the pilot"
+	)
+	_expect(
+		_sonar_screen_is_ahead_of_bank(sonar_screen, electrical_bank),
+		"right-side electrical equipment does not hide the sonar display"
+	)
+	_expect(
+		_sonar_screen_clears_housing(sonar_screen, sonar_housing),
+		"sonar texture clears its housing without depth overlap"
+	)
+	_expect(
+		instruments.find_children("SonarReferenceTrace", "MeshInstance3D", true).is_empty(),
+		"cockpit sonar does not invent a decorative profile"
+	)
 	_expect(detailing.pressure_hull_rib_count() >= 6, "cockpit exposes reinforced pressure-hull structure")
 	_expect(detailing.pipe_segment_count() >= 13, "cockpit exposes a complete life-support pipe run")
 	_expect(absf(detailing.battery_needle_degrees()) > 100.0, "analog battery gauge follows the dive snapshot")
@@ -148,6 +170,7 @@ func _test_vehicle_slice(composition: VerticalSliceRoot) -> void:
 		instruments.sonar_texture() == sonar_display.sonar_texture(),
 		"physical and expanded sonar views share one texture"
 	)
+	_expect(sonar_display.idle_prompt_visible(), "idle sonar explains how to emit a scan")
 
 	adapter.sonar_scan_requested.emit()
 	var first_scan = sonar_service.current_scan()
@@ -155,9 +178,12 @@ func _test_vehicle_slice(composition: VerticalSliceRoot) -> void:
 	_expect(first_scan.samples.observed_count() > 1000, "reference acquisition captures dense bathymetry")
 	_expect(first_scan.contacts.size() >= 1, "metal calibration target becomes a distinct contact")
 	_expect("RELEVÉ EN COURS" in sonar_display.status_text(), "sonar display reports progressive reveal")
-	for frame in 8:
+	_expect(not sonar_display.idle_prompt_visible(), "sonar data replaces the idle instruction")
+	for frame in 18:
 		await physics_frame
 	_expect(sonar_display.built_row_count() > 0, "renderer reveals near rows incrementally")
+	_expect(sonar_display.built_triangle_count() >= 90, "sonar renders a dense relief surface, not a line")
+	_expect(sonar_display.built_grid_segment_count() > 0, "sonar overlays a perspective grid on the relief")
 	adapter.sonar_view_toggle_requested.emit()
 	_expect(sonar_display.is_expanded(), "sonar can expand without pausing the dive")
 	adapter.sonar_view_toggle_requested.emit()
@@ -276,6 +302,47 @@ func _pressed_key(keycode: Key) -> InputEventKey:
 	return event
 
 
+func _sonar_screen_faces_camera(
+	sonar_screen: MeshInstance3D,
+	cockpit_camera: Camera3D
+) -> bool:
+	if sonar_screen == null or cockpit_camera == null:
+		return false
+	var direction_to_camera := (
+		cockpit_camera.global_position - sonar_screen.global_position
+	).normalized()
+	return sonar_screen.global_basis.z.normalized().dot(direction_to_camera) > 0.85
+
+
+func _sonar_screen_is_ahead_of_bank(
+	sonar_screen: MeshInstance3D,
+	electrical_bank: Node3D
+) -> bool:
+	if sonar_screen == null or electrical_bank == null:
+		return false
+	for child: Node in electrical_bank.get_children():
+		if child is MeshInstance3D and child.name.begins_with("JunctionBox"):
+			if sonar_screen.global_position.z <= (child as MeshInstance3D).global_position.z:
+				return false
+	return true
+
+
+func _sonar_screen_clears_housing(
+	sonar_screen: MeshInstance3D,
+	sonar_housing: MeshInstance3D
+) -> bool:
+	if sonar_screen == null or sonar_housing == null:
+		return false
+	var housing_box := sonar_housing.mesh as BoxMesh
+	if housing_box == null:
+		return false
+	var housing_front_z := (
+		sonar_housing.position.z
+		+ housing_box.size.z * sonar_housing.scale.z * 0.5
+	)
+	return sonar_screen.position.z >= housing_front_z + 0.005
+
+
 func _binding_for(adapter: ProductionInputAdapter, action_id: StringName) -> String:
 	for binding in adapter.binding_snapshots():
 		if binding.action_id == action_id: