fix(studio): Add solid floor collision, live 3D gizmo dragging, inspector property sync, and nudge shortcuts

scripts/smoke_test_studio_interaction.gd

@@ -0,0 +1,158 @@
+extends SceneTree
+## Headless smoke test verifying Studio floor collision, selection,
+## gizmo ray picking, inspector property sync, and transformation manipulation.
+
+var _failures: int = 0
+var _checks: int = 0
+
+const StudioMainClass = preload("res://scripts/studio/studio_main.gd")
+const TransformGizmo3DClass = preload("res://scripts/studio/gizmos/transform_gizmo_3d.gd")
+
+func _init() -> void:
+	print("--- Running Smoke Test: Studio Viewport Interaction & Floor Collision ---")
+	test_floor_collision_body()
+	test_inspector_sync_and_visual_transform()
+	test_gizmo_picking_and_dragging()
+	test_nudge_shortcuts_and_delete()
+
+	if _failures == 0:
+		print("--- PASS: All %d studio interaction checks passed! ---" % _checks)
+		quit(0)
+	else:
+		printerr("--- FAIL: %d failures out of %d checks ---" % [_failures, _checks])
+		quit(1)
+
+
+func _check(desc: String, cond: bool) -> void:
+	_checks += 1
+	if cond:
+		print("  ✓ %s" % desc)
+	else:
+		_failures += 1
+		printerr("  ✗ FAIL: %s" % desc)
+
+
+func test_floor_collision_body() -> void:
+	print("Testing Studio floor collision setup...")
+	var studio := StudioMainClass.new()
+	root.add_child(studio)
+
+	var floor_body = studio._sub_viewport.find_child("StudioFloorBody", true, false)
+	_check("StudioFloorBody exists in 3D viewport", floor_body != null)
+	if floor_body is StaticBody3D:
+		var sb := floor_body as StaticBody3D
+		_check("Floor body has collision layer 1 enabled", sb.get_collision_layer_value(1))
+		_check("Floor body has collision mask 1 enabled", sb.get_collision_mask_value(1))
+		var col = sb.find_child("*", true, false) as CollisionShape3D
+		_check("Floor body has CollisionShape3D", col != null and col.shape is BoxShape3D)
+		if col != null and col.shape is BoxShape3D:
+			var box := col.shape as BoxShape3D
+			_check("Floor collider spans at least 100x100m", box.size.x >= 100.0 and box.size.z >= 100.0)
+
+	studio.queue_free()
+
+
+func test_inspector_sync_and_visual_transform() -> void:
+	print("Testing Inspector property sync to 3D visual nodes...")
+	var studio := StudioMainClass.new()
+	root.add_child(studio)
+
+	# Place an object
+	var obj_id := studio.core.place_object("crate_small", Vector3(10, 20, 0))
+	studio._spawn_visual_node(obj_id)
+	studio._on_selection_changed(obj_id)
+
+	var visual_node := studio._world_container.get_node_or_null(obj_id) as Node3D
+	_check("Visual node exists in world container", visual_node != null)
+
+	# Simulate inspector position change (moving object via Inspector)
+	studio._inspector_dock._pos_x.value = 15.0
+	studio._inspector_dock._pos_y.value = 3.0
+	studio._inspector_dock._pos_z.value = 25.0
+	studio._inspector_dock._on_pos_changed(0.0)
+
+	_check("Visual node position updated to match Inspector X", is_equal_approx(visual_node.position.x, 15.0))
+	_check("Visual node position updated to match Inspector Y (height)", is_equal_approx(visual_node.position.y, 3.0))
+	_check("Visual node position updated to match Inspector Z (depth)", is_equal_approx(visual_node.position.z, 25.0))
+
+	# Simulate inspector yaw rotation change
+	studio._inspector_dock._rot_y.value = 90.0
+	studio._inspector_dock._on_rot_changed(90.0)
+	_check("Visual node rotated to match Inspector Yaw", absf(visual_node.rotation_degrees.y - 90.0) < 0.1)
+
+	# Simulate inspector scale change
+	studio._inspector_dock._scale_x.value = 2.0
+	studio._inspector_dock._scale_y.value = 1.5
+	studio._inspector_dock._scale_z.value = 2.0
+	studio._inspector_dock._on_scale_changed(0.0)
+	_check("Visual node scale updated to match Inspector", is_equal_approx(visual_node.scale.x, 2.0) and is_equal_approx(visual_node.scale.y, 1.5))
+
+	studio.queue_free()
+
+
+func test_gizmo_picking_and_dragging() -> void:
+	print("Testing Gizmo geometric picking and axis detection...")
+	var studio := StudioMainClass.new()
+	root.add_child(studio)
+
+	var obj_id := studio.core.place_object("bison", Vector3(0, 0, 0))
+	studio._spawn_visual_node(obj_id)
+	studio._on_selection_changed(obj_id)
+
+	var gizmo = studio._gizmo_3d
+	_check("Gizmo is attached and visible on selection", gizmo != null and gizmo.visible)
+
+	# Test X axis picking (ray aimed near +X arrow at (1.0, 0, 0) relative to gizmo)
+	var ray_origin: Vector3 = gizmo.position + Vector3(1.0, 5.0, 0.0)
+	var ray_dir: Vector3 = Vector3(0.0, -1.0, 0.0)
+	var picked_axis = gizmo.pick_axis(ray_origin, ray_dir)
+	_check("Gizmo ray picking correctly identified X axis", picked_axis == TransformGizmo3DClass.Axis.X)
+
+	# Test Y axis picking (ray aimed near +Y arrow at (0, 1.0, 0) relative to gizmo)
+	ray_origin = gizmo.position + Vector3(0.0, 1.0, 5.0)
+	ray_dir = Vector3(0.0, 0.0, -1.0)
+	picked_axis = gizmo.pick_axis(ray_origin, ray_dir)
+	_check("Gizmo ray picking correctly identified Y axis", picked_axis == TransformGizmo3DClass.Axis.Y)
+
+	# Test Z axis picking (ray aimed near +Z arrow at (0, 0, 1.0) relative to gizmo)
+	ray_origin = gizmo.position + Vector3(0.0, 5.0, 1.0)
+	ray_dir = Vector3(0.0, -1.0, 0.0)
+	picked_axis = gizmo.pick_axis(ray_origin, ray_dir)
+	_check("Gizmo ray picking correctly identified Z axis", picked_axis == TransformGizmo3DClass.Axis.Z)
+
+	# Test Center picking (ray aimed at gizmo origin)
+	ray_origin = gizmo.position + Vector3(0.0, 5.0, 0.0)
+	ray_dir = Vector3(0.0, -1.0, 0.0)
+	picked_axis = gizmo.pick_axis(ray_origin, ray_dir)
+	_check("Gizmo ray picking correctly identified Center/Plane handle", picked_axis == TransformGizmo3DClass.Axis.XY)
+
+	studio.queue_free()
+
+
+func test_nudge_shortcuts_and_delete() -> void:
+	print("Testing keyboard nudge shortcuts and object deletion...")
+	var studio := StudioMainClass.new()
+	root.add_child(studio)
+
+	var obj_id := studio.core.place_object("crate_small", Vector3(0, 0, 0))
+	studio._spawn_visual_node(obj_id)
+	studio.core.select_object(obj_id)
+	studio._on_selection_changed(obj_id)
+
+	var visual_node := studio._world_container.get_node_or_null(obj_id) as Node3D
+
+	# Nudge position right (+X)
+	var old_x = visual_node.position.x
+	studio._nudge_selected_position(Vector3(1, 0, 0))
+	_check("Nudge right moved visual node +X by 1.0", is_equal_approx(visual_node.position.x, old_x + 1.0))
+
+	# Nudge rotation
+	studio._nudge_selected_rotation(45.0)
+	_check("Nudge rotation rotated visual node by 45 degrees", is_equal_approx(visual_node.rotation_degrees.y, 45.0))
+
+	# Delete object
+	studio._delete_selected_object(obj_id)
+	_check("Object deleted from Core model", studio.core.model.find_object(obj_id) == null)
+	_check("Selection cleared after delete", studio.core.selection.get_selected() == "")
+
+	studio.queue_free()