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Workflow:
I’m trying to reproduce this Magic Leap 2 tutorial AR Experience Plugin | MagicLeap Developer Documentation, but the code provided seems to be outdated or incorrect leaving me unable to reproduce the example, since the raised errors prevent me from enabling the extension.
Main Issue:
I can’t seem to find the omni.kit.xr.scene_view.utils repository where WidgetComponent, UiContainer and SceneViewUtils have their methods declared. If I knew where they are I may be able to fix the current problems.
Reproduction Steps:
I’m using the code available at GitHub - magicleap/MagicLeap-Omniverse-In-Scene-UI-Tutorial: Omniverse In Scene UI Tutorial, with the current alterations to the extensions.py file:
################################################################################
# MagicLeap Omniverse Kit In-Scene UI Interaction Example #
################################################################################
import omni.ext
import omni.ui as ui
from carb import Float2, Float3, events
from pxr import Sdf
#No module named 'omni.kit.scene_view', omni.kit.xr.sceneview_utils
from omni.kit.scene_view.usd import UsdSceneView
from omni.kit.xr.scene_view.utils import SceneViewUtils, UiContainer
from omni.timeline import get_timeline_interface
from omni.ui import scene as sc
class MagicleapWidget(ui.Widget):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self._build_ui()
def __del__(self):
self.destroy()
def _build_ui(self):
self._widget = ui.VStack()
with self._widget:
label = ui.Label("Press the buttons to add and delete spheres.")
with ui.HStack():
ui.Button("Spawn", clicked_fn=spawn_sphere)
ui.Button("Delete", clicked_fn=delete_spheres)
class MagicleapInSceneUITutorialExtension(omni.ext.IExt):
def __init__(self) -> None:
super().__init__()
self._scene_view_utils: SceneViewUtils | None = None
self._widget_container: UiContainer[MagicleapWidget] | None = None
# Called when this extension is loaded
def on_startup(self, ext_id):
print("[magicleap.hello.world] magicleap hello world startup")
self._stage_evt_handler = omni.usd.get_context().get_stage_event_stream() \
.create_subscription_to_pop(self.on_stage_event, name="handlestageevents")
if (omni.usd.get_context().get_stage_state() == omni.usd.StageState.OPENED):
self._create_widget()
# Called when this extension is unloaded
def on_shutdown(self):
print("[magicleap.hello.world] magicleap hello world shutdown")
if self._stage_evt_handler:
self._stage_evt_handler.unsubscribe()
self._stage_evt_handler = None
self._destroy_widget()
# The UI widget can only be instantiated in the current usd stage after one has been opened.
def on_stage_event(self, e: events.IEvent):
if e.type == int(omni.usd.StageEventType.OPENED):
self._create_widget()
elif e.type == int(omni.usd.StageEventType.CLOSING):
self._destroy_widget()
# Leverage SceneViewUtils to create UI elements in the current usd stage
def _create_widget(self):
if self._scene_view_utils is None:
self._scene_view_utils = SceneViewUtils(UsdSceneView)
if self._widget_container is None:
self._widget_container = \
self._scene_view_utils.create_widget_factory(MagicleapWidget) \
.with_size(Float2(600, 300)) \
.with_position(Float3(0, 300, 0)) \
.with_resolution_scale(3) \
.with_construct_args() \
.with_update_policy(sc.Widget.UpdatePolicy.ALWAYS) \
.build()
# Remove UI elements from the stage
def _destroy_widget(self):
if self._widget_container:
self._widget_container.clear()
self._widget_container = None
# Spawn a sphere prim in the scene
def spawn_sphere():
# Ensure stage
stage = omni.usd.get_context().get_stage()
if stage is None:
return
# Ensure that the timeline is set to play to see physics act on the sphere.
timeline = get_timeline_interface()
if timeline.is_stopped():
timeline.play()
# Generate a path for the sphere
sphere_path = Sdf.Path(omni.usd.get_stage_next_free_path(stage, "/World/Sphere", False))
# Create a sphere prim with a default transform
omni.kit.commands.execute('CreateMeshPrimWithDefaultXform',
prim_type='Sphere',
prim_path=sphere_path,
select_new_prim=True,
prepend_default_prim=True,
above_ground=True)
# Pose the sphere prim above the buttons
omni.kit.commands.execute('TransformMultiPrimsSRTCpp',
count=1,
paths=[str(sphere_path)],
new_translations=[0.0, 350.0, 0.0],
new_scales=[1.0, 1.0, 1.0])
# Attach a rigid body to the sphere and watch it fall!
omni.kit.commands.execute('SetRigidBody',
path=sphere_path,
approximationShape='convexHull',
kinematic=False)
# Delete all spheres from the scene
def delete_spheres():
# Ensure stage
stage = omni.usd.get_context().get_stage()
if stage is None:
return
# Find all spheres in the scene
spheres = []
for prim in stage.Traverse():
name = str(prim.GetName())
if "Sphere" in name:
spheres.append(prim.GetPath())
# Delete all of the spheres that were found
omni.kit.commands.execute('DeletePrims',
paths=spheres,
destructive=False)
Error Code:
[carb.scripting-python.plugin] AttributeError: 'SceneViewUtils' object has no attribute 'create_widget_factory'