4.5.0
Windows 11
We’ve been using sunstudy to randomize the time of day with dynamic sky in our data generation process. After downlaoding and setting up isaac sim 4.5.0 I cant find the sunstudy extention:
but in isaac sim 4.2.0:
how can i setup sunstudy in isaac sim 4.5.0?
Thank you
@danielle.sisserman i read on Discord from a mod that the sun study standalone extension was deprecated. the environment core and window you have enabled may offer similar control/capability. not sure if it’ll fit your specific use case for randomizing time of day programmatically through SDG, though. how have you been going about the randomization? i remember you had inquired about this a few years back.
@Simplychenable Yes thats right! So the way I do it is i enable the sunstudy extension and then in my code I use a wrapper i wrote for sunstudy:
import carb
from my_company.randomizer.usd_randomization.randomize import RandomizeUSD
from my_company.simulator.utils.singleton_base import SingletonBase
from my_company.sunstudy.wrapper import get_sunstudy_player
import random
class TimeRandomizer(RandomizeUSD, SingletonBase):
def __init__(self, min_time = 6, max_time = 18, session_data_saver = None):
if not hasattr(self, 'initialized'):
self.sunstudy = get_sunstudy_player()
self.min_time = min_time
self.max_time = max_time
self.initialized = True
super().__init__(session_data_saver=session_data_saver)
def randomize(self):
random_float = random.uniform(self.min_time, self.max_time)
#carb.log_error(f"Sunstudy time set to {random_float}")
self.sunstudy.current_time = random_float
self.save_random_value_selected(random_float)
return random_float
def save_random_value_selected(self, random_selected):
if self.session_data_saver is not None:
self.session_data_saver.add_time_stamp(random_selected)
@staticmethod
def get_current_time():
instance = TimeRandomizer.get_instance()
return instance.sunstudy.current_time
my wrapper is an extension with two scripts:
extension.py:
import omni.ext
import omni.ui as ui
from .custom_sunstudy import CustomSunstudyPlayer
from typing import Any, Optional
_extension_instance = None
class MyCompanySunstudyWrapperExtension(omni.ext.IExt):
def on_startup(self, ext_id):
"""Startup logic for our wrapper extension."""
print("[MyCustomEnvironmentExtension] Custom extension started.")
self._custom_sunstudy_player = None # Initialize
global _extension_instance
_extension_instance = self
def get_sunstudy_player(self):
"""Intercept and replace the built-in SunstudyPlayer with our custom version."""
if self._custom_sunstudy_player is None:
self._custom_sunstudy_player = CustomSunstudyPlayer()
return self._custom_sunstudy_player
def on_shutdown(self):
"""Cleanup logic when extension is disabled."""
print("[MyCustomEnvironmentExtension] Custom extension shutting down.")
self._custom_sunstudy_player = None # Cleanup instance
global _extension_instance
_extension_instance = None
def get_instance() -> Optional[MyComapnySunstudyWrapperExtension]:
return _extension_instance
def get_sunstudy_player() -> CustomSunstudyPlayer:
instance = get_instance()
if instance:
return instance.get_sunstudy_player()
else:
return None
custom_sunstudy.py:
from omni.kit.environment.core.sunstudy_player.player import SunstudyPlayer
import carb
class CustomSunstudyPlayer(SunstudyPlayer):
def _update_sky_data(self):
if not (self._stage and self._sky_root):
return
carb.log_error("$$$$$$CustomSunstudyPlayer._update_sky_data()$$$$$$")
prim = self._stage.GetPrimAtPath(self._sky_root)
if prim.IsValid():
sundata = self._get_sun_position(
self._latitude_model.as_float,
self._longitude_model.as_float,
self._current_time_model.as_float,
self._skydata["DayOfYear"],
self._fixtimezone,
)
for k, v in sundata.items():
self._skydata[k] = v
self._write_sky_params()
self._skysettings["SunIntensity"] = 1000
self._update_fog()
looks like we will have to wait for an official response from the devs/mods and see if there’s a workaround so you can still utilize your script.
@Simplychenable i agree. if sunstudy is no longer supported then the omniverse team would know of the new official tool to randomize time with dynamic sky