omni.isaac.lab.managers

Sub-module for environment managers.

The managers are used to handle various aspects of the environment such as randomization events, curriculum, and observations. Each manager implements a specific functionality for the environment. The managers are designed to be modular and can be easily extended to support new functionality.

Classes

SceneEntityCfg	Configuration for a scene entity that is used by the manager's term.
ManagerBase	Base class for all managers.
ManagerTermBase	Base class for manager terms.
ManagerTermBaseCfg	Configuration for a manager term.
ObservationManager	Manager for computing observation signals for a given world.
ObservationGroupCfg	Configuration for an observation group.
ObservationTermCfg	Configuration for an observation term.
ActionManager	Manager for processing and applying actions for a given world.
ActionTerm	Base class for action terms.
ActionTermCfg	Configuration for an action term.
EventManager	Manager for orchestrating operations based on different simulation events.
EventTermCfg	Configuration for a event term.
CommandManager	Manager for generating commands.
CommandTerm	The base class for implementing a command term.
CommandTermCfg	Configuration for a command generator term.
RewardManager	Manager for computing reward signals for a given world.
RewardTermCfg	Configuration for a reward term.
TerminationManager	Manager for computing done signals for a given world.
TerminationTermCfg	Configuration for a termination term.
CurriculumManager	Manager to implement and execute specific curricula.
CurriculumTermCfg	Configuration for a curriculum term.

Scene Entity

class omni.isaac.lab.managers.SceneEntityCfg

Configuration for a scene entity that is used by the manager’s term.

This class is used to specify the name of the scene entity that is queried from the InteractiveScene and passed to the manager’s term function.

Attributes:

name	The name of the scene entity.
joint_names	The names of the joints from the scene entity.
joint_ids	The indices of the joints from the asset required by the term.
fixed_tendon_names	The names of the fixed tendons from the scene entity.
fixed_tendon_ids	The indices of the fixed tendons from the asset required by the term.
body_names	The names of the bodies from the asset required by the term.
body_ids	The indices of the bodies from the asset required by the term.
preserve_order	Whether to preserve indices ordering to match with that in the specified joint or body names.

Methods:

resolve(scene)

Resolves the scene entity and converts the joint and body names to indices.

name: str

The name of the scene entity.

This is the name defined in the scene configuration file. See the InteractiveSceneCfg class for more details.

joint_names: str | list[str] | None

The names of the joints from the scene entity. Defaults to None.

The names can be either joint names or a regular expression matching the joint names.

These are converted to joint indices on initialization of the manager and passed to the term function as a list of joint indices under joint_ids.

joint_ids: list[int] | slice

The indices of the joints from the asset required by the term. Defaults to slice(None), which means all the joints in the asset (if present).

If joint_names is specified, this is filled in automatically on initialization of the manager.

fixed_tendon_names: str | list[str] | None

The names of the fixed tendons from the scene entity. Defaults to None.

The names can be either joint names or a regular expression matching the joint names.

These are converted to fixed tendon indices on initialization of the manager and passed to the term function as a list of fixed tendon indices under fixed_tendon_ids.

fixed_tendon_ids: list[int] | slice

The indices of the fixed tendons from the asset required by the term. Defaults to slice(None), which means all the fixed tendons in the asset (if present).

If fixed_tendon_names is specified, this is filled in automatically on initialization of the manager.

body_names: str | list[str] | None

The names of the bodies from the asset required by the term. Defaults to None.

The names can be either body names or a regular expression matching the body names.

These are converted to body indices on initialization of the manager and passed to the term function as a list of body indices under body_ids.

body_ids: list[int] | slice

The indices of the bodies from the asset required by the term. Defaults to slice(None), which means all the bodies in the asset.

If body_names is specified, this is filled in automatically on initialization of the manager.

preserve_order: bool

Whether to preserve indices ordering to match with that in the specified joint or body names. Defaults to False.

If False, the ordering of the indices are sorted in ascending order (i.e. the ordering in the entity’s joints or bodies). Otherwise, the indices are preserved in the order of the specified joint and body names.

For more details, see the omni.isaac.lab.utils.string.resolve_matching_names() function.

Note

This attribute is only used when joint_names or body_names are specified.

resolve(scene: InteractiveScene)

Resolves the scene entity and converts the joint and body names to indices.

This function examines the scene entity from the InteractiveScene and resolves the indices and names of the joints and bodies. It is an expensive operation as it resolves regular expressions and should be called only once.

Parameters:

scene – The interactive scene instance.

Raises:

• ValueError – If the scene entity is not found.

• ValueError – If both joint_names and joint_ids are specified and are not consistent.

• ValueError – If both fixed_tendon_names and fixed_tendon_ids are specified and are not consistent.

• ValueError – If both body_names and body_ids are specified and are not consistent.

Manager Base

class omni.isaac.lab.managers.ManagerBase

Base class for all managers.

Methods:

__init__(cfg, env)	Initialize the manager.
reset([env_ids])	Resets the manager and returns logging information for the current time-step.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

num_envs	Number of environments.
device	Device on which to perform computations.
active_terms	Name of active terms.

__init__(cfg: object, env: ManagerBasedEnv)

Initialize the manager.

Parameters:

• cfg – The configuration object. If None, the manager is initialized without any terms.

• env – The environment instance.

property num_envs: int

Number of environments.

property device: str

Device on which to perform computations.

abstract property active_terms: list[str] | dict[str, list[str]]

Name of active terms.

reset(env_ids: Sequence[int] | None = None) → dict[str, float]

Resets the manager and returns logging information for the current time-step.

Parameters:

env_ids – The environment ids for which to log data. Defaults None, which logs data for all environments.

Returns:

Dictionary containing the logging information.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

class omni.isaac.lab.managers.ManagerTermBase

Base class for manager terms.

Manager term implementations can be functions or classes. If the term is a class, it should inherit from this base class and implement the required methods.

Each manager is implemented as a class that inherits from the ManagerBase class. Each manager class should also have a corresponding configuration class that defines the configuration terms for the manager. Each term should the ManagerTermBaseCfg class or its subclass.

Example pseudo-code for creating a manager:

from omni.isaac.lab.utils import configclass
from omni.isaac.lab.utils.mdp import ManagerBase, ManagerTermBaseCfg

@configclass
class MyManagerCfg:

    my_term_1: ManagerTermBaseCfg = ManagerTermBaseCfg(...)
    my_term_2: ManagerTermBaseCfg = ManagerTermBaseCfg(...)
    my_term_3: ManagerTermBaseCfg = ManagerTermBaseCfg(...)

# define manager instance
my_manager = ManagerBase(cfg=ManagerCfg(), env=env)

Methods:

__init__(cfg, env)	Initialize the manager term.
reset([env_ids])	Resets the manager term.

Attributes:

num_envs	Number of environments.
device	Device on which to perform computations.

__init__(cfg: ManagerTermBaseCfg, env: ManagerBasedEnv)

Initialize the manager term.

Parameters:

• cfg – The configuration object.

• env – The environment instance.

property num_envs: int

Number of environments.

property device: str

Device on which to perform computations.

reset(env_ids: Sequence[int] | None = None) → None

Resets the manager term.

Parameters:

env_ids – The environment ids. Defaults to None, in which case all environments are considered.

class omni.isaac.lab.managers.ManagerTermBaseCfg

Configuration for a manager term.

Attributes:

func	The function or class to be called for the term.
params	The parameters to be passed to the function as keyword arguments.

func: Callable | ManagerTermBase

The function or class to be called for the term.

The function must take the environment object as the first argument. The remaining arguments are specified in the params attribute.

It also supports callable classes, i.e. classes that implement the __call__() method. In this case, the class should inherit from the ManagerTermBase class and implement the required methods.

params: dict[str, Any | SceneEntityCfg]

The parameters to be passed to the function as keyword arguments. Defaults to an empty dict.

Note

If the value is a SceneEntityCfg object, the manager will query the scene entity from the InteractiveScene and process the entity’s joints and bodies as specified in the SceneEntityCfg object.

Observation Manager

class omni.isaac.lab.managers.ObservationManager

Bases: ManagerBase

Manager for computing observation signals for a given world.

Observations are organized into groups based on their intended usage. This allows having different observation groups for different types of learning such as asymmetric actor-critic and student-teacher training. Each group contains observation terms which contain information about the observation function to call, the noise corruption model to use, and the sensor to retrieve data from.

Each observation group should inherit from the ObservationGroupCfg class. Within each group, each observation term should instantiate the ObservationTermCfg class. Based on the configuration, the observations in a group can be concatenated into a single tensor or returned as a dictionary with keys corresponding to the term’s name.

If the observations in a group are concatenated, the shape of the concatenated tensor is computed based on the shapes of the individual observation terms. This information is stored in the group_obs_dim dictionary with keys as the group names and values as the shape of the observation tensor. When the terms in a group are not concatenated, the attribute stores a list of shapes for each term in the group.

Note

When the observation terms in a group do not have the same shape, the observation terms cannot be concatenated. In this case, please set the ObservationGroupCfg.concatenate_terms attribute in the group configuration to False.

The observation manager can be used to compute observations for all the groups or for a specific group. The observations are computed by calling the registered functions for each term in the group. The functions are called in the order of the terms in the group. The functions are expected to return a tensor with shape (num_envs, …).

If a noise model or custom modifier is registered for a term, the function is called to corrupt the observation. The corruption function is expected to return a tensor with the same shape as the observation. The observations are clipped and scaled as per the configuration settings.

Methods:

__init__(cfg, env)	Initialize observation manager.
reset([env_ids])	Resets the manager and returns logging information for the current time-step.
compute()	Compute the observations per group for all groups.
compute_group(group_name)	Computes the observations for a given group.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

active_terms	Name of active observation terms in each group.
group_obs_dim	Shape of computed observations in each group.
group_obs_term_dim	Shape of individual observation terms in each group.
group_obs_concatenate	Whether the observation terms are concatenated in each group or not.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedEnv)

Initialize observation manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, ObservationGroupCfg]).

• env – The environment instance.

Raises:

• ValueError – If the configuration is None.

• RuntimeError – If the shapes of the observation terms in a group are not compatible for concatenation and the concatenate_terms attribute is set to True.

property active_terms: dict[str, list[str]]

Name of active observation terms in each group.

The keys are the group names and the values are the list of observation term names in the group.

property group_obs_dim: dict[str, tuple[int, ...] | list[tuple[int, ...]]]

Shape of computed observations in each group.

The key is the group name and the value is the shape of the observation tensor. If the terms in the group are concatenated, the value is a single tuple representing the shape of the concatenated observation tensor. Otherwise, the value is a list of tuples, where each tuple represents the shape of the observation tensor for a term in the group.

property group_obs_term_dim: dict[str, list[tuple[int, ...]]]

Shape of individual observation terms in each group.

The key is the group name and the value is a list of tuples representing the shape of the observation terms in the group. The order of the tuples corresponds to the order of the terms in the group. This matches the order of the terms in the active_terms.

property group_obs_concatenate: dict[str, bool]

Whether the observation terms are concatenated in each group or not.

The key is the group name and the value is a boolean specifying whether the observation terms in the group are concatenated into a single tensor. If True, the observations are concatenated along the last dimension.

The values are set based on the concatenate_terms attribute in the group configuration.

reset(env_ids: Sequence[int] | None = None) → dict[str, float]

Resets the manager and returns logging information for the current time-step.

Parameters:

env_ids – The environment ids for which to log data. Defaults None, which logs data for all environments.

Returns:

Dictionary containing the logging information.

compute() → dict[str, torch.Tensor | dict[str, torch.Tensor]]

Compute the observations per group for all groups.

The method computes the observations for all the groups handled by the observation manager. Please check the compute_group() on the processing of observations per group.

Returns:

A dictionary with keys as the group names and values as the computed observations. The observations are either concatenated into a single tensor or returned as a dictionary with keys corresponding to the term’s name.

compute_group(group_name: str) → torch.Tensor | dict[str, torch.Tensor]

Computes the observations for a given group.

The observations for a given group are computed by calling the registered functions for each term in the group. The functions are called in the order of the terms in the group. The functions are expected to return a tensor with shape (num_envs, …).

The following steps are performed for each observation term:

1. Compute observation term by calling the function

2. Apply custom modifiers in the order specified in ObservationTermCfg.modifiers

3. Apply corruption/noise model based on ObservationTermCfg.noise

4. Apply clipping based on ObservationTermCfg.clip

5. Apply scaling based on ObservationTermCfg.scale

We apply noise to the computed term first to maintain the integrity of how noise affects the data as it truly exists in the real world. If the noise is applied after clipping or scaling, the noise could be artificially constrained or amplified, which might misrepresent how noise naturally occurs in the data.

Parameters:

group_name – The name of the group for which to compute the observations. Defaults to None, in which case observations for all the groups are computed and returned.

Returns:

Depending on the group’s configuration, the tensors for individual observation terms are concatenated along the last dimension into a single tensor. Otherwise, they are returned as a dictionary with keys corresponding to the term’s name.

Raises:

ValueError – If input group_name is not a valid group handled by the manager.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.ObservationGroupCfg

Configuration for an observation group.

Attributes:

concatenate_terms	Whether to concatenate the observation terms in the group.
enable_corruption	Whether to enable corruption for the observation group.

concatenate_terms: bool

Whether to concatenate the observation terms in the group. Defaults to True.

If true, the observation terms in the group are concatenated along the last dimension. Otherwise, they are kept separate and returned as a dictionary.

If the observation group contains terms of different dimensions, it must be set to False.

enable_corruption: bool

Whether to enable corruption for the observation group. Defaults to False.

If true, the observation terms in the group are corrupted by adding noise (if specified). Otherwise, no corruption is applied.

class omni.isaac.lab.managers.ObservationTermCfg

Configuration for an observation term.

Attributes:

func	The name of the function to be called.
modifiers	The list of data modifiers to apply to the observation in order.
noise	The noise to add to the observation.
clip	The clipping range for the observation after adding noise.
scale	The scale to apply to the observation after clipping.
params	The parameters to be passed to the function as keyword arguments.

func: Callable[..., torch.Tensor]

The name of the function to be called.

This function should take the environment object and any other parameters as input and return the observation signal as torch float tensors of shape (num_envs, obs_term_dim).

modifiers: list[ModifierCfg] | None

The list of data modifiers to apply to the observation in order. Defaults to None, in which case no modifications will be applied.

Modifiers are applied in the order they are specified in the list. They can be stateless or stateful, and can be used to apply transformations to the observation data. For example, a modifier can be used to normalize the observation data or to apply a rolling average.

For more information on modifiers, see the ModifierCfg class.

noise: NoiseCfg | None

The noise to add to the observation. Defaults to None, in which case no noise is added.

clip: tuple[float, float] | None

The clipping range for the observation after adding noise. Defaults to None, in which case no clipping is applied.

scale: tuple[float, ...] | float | None

The scale to apply to the observation after clipping. Defaults to None, in which case no scaling is applied (same as setting scale to 1).

We leverage PyTorch broadcasting to scale the observation tensor with the provided value. If a tuple is provided, please make sure the length of the tuple matches the dimensions of the tensor outputted from the term.

params: dict[str, Any | SceneEntityCfg]

The parameters to be passed to the function as keyword arguments. Defaults to an empty dict.

Note

If the value is a SceneEntityCfg object, the manager will query the scene entity from the InteractiveScene and process the entity’s joints and bodies as specified in the SceneEntityCfg object.

Action Manager

class omni.isaac.lab.managers.ActionManager

Bases: ManagerBase

Manager for processing and applying actions for a given world.

The action manager handles the interpretation and application of user-defined actions on a given world. It is comprised of different action terms that decide the dimension of the expected actions.

The action manager performs operations at two stages:

• processing of actions: It splits the input actions to each term and performs any pre-processing needed. This should be called once at every environment step.

• apply actions: This operation typically sets the processed actions into the assets in the scene (such as robots). It should be called before every simulation step.

Methods:

__init__(cfg, env)	Initialize the action manager.
set_debug_vis(debug_vis)	Sets whether to visualize the action data.
reset([env_ids])	Resets the action history.
process_action(action)	Processes the actions sent to the environment.
apply_action()	Applies the actions to the environment/simulation.
get_term(name)	Returns the action term with the specified name.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

total_action_dim	Total dimension of actions.
active_terms	Name of active action terms.
action_term_dim	Shape of each action term.
action	The actions sent to the environment.
prev_action	The previous actions sent to the environment.
has_debug_vis_implementation	Whether the command terms have debug visualization implemented.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedEnv)

Initialize the action manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, ActionTermCfg]).

• env – The environment instance.

Raises:

ValueError – If the configuration is None.

property total_action_dim: int

Total dimension of actions.

property active_terms: list[str]

Name of active action terms.

property action_term_dim: list[int]

Shape of each action term.

property action: torch.Tensor

The actions sent to the environment. Shape is (num_envs, total_action_dim).

property prev_action: torch.Tensor

The previous actions sent to the environment. Shape is (num_envs, total_action_dim).

property has_debug_vis_implementation: bool

Whether the command terms have debug visualization implemented.

set_debug_vis(debug_vis: bool) → bool

Sets whether to visualize the action data. :param debug_vis: Whether to visualize the action data.

Returns:

Whether the debug visualization was successfully set. False if the action does not support debug visualization.

reset(env_ids: Sequence[int] | None = None) → dict[str, torch.Tensor]

Resets the action history.

Parameters:

env_ids – The environment ids. Defaults to None, in which case all environments are considered.

Returns:

An empty dictionary.

process_action(action: torch.Tensor)

Processes the actions sent to the environment.

Note

This function should be called once per environment step.

Parameters:

action – The actions to process.

apply_action() → None

Applies the actions to the environment/simulation.

Note

This should be called at every simulation step.

get_term(name: str) → ActionTerm

Returns the action term with the specified name.

Parameters:

name – The name of the action term.

Returns:

The action term with the specified name.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.ActionTerm

Bases: ManagerTermBase

Base class for action terms.

The action term is responsible for processing the raw actions sent to the environment and applying them to the asset managed by the term. The action term is comprised of two operations:

• Processing of actions: This operation is performed once per environment step and is responsible for pre-processing the raw actions sent to the environment.

• Applying actions: This operation is performed once per simulation step and is responsible for applying the processed actions to the asset managed by the term.

Methods:

__init__(cfg, env)	Initialize the action term.
set_debug_vis(debug_vis)	Sets whether to visualize the action term data.
process_actions(actions)	Processes the actions sent to the environment.
apply_actions()	Applies the actions to the asset managed by the term.
reset([env_ids])	Resets the manager term.

Attributes:

action_dim	Dimension of the action term.
raw_actions	The input/raw actions sent to the term.
processed_actions	The actions computed by the term after applying any processing.
has_debug_vis_implementation	Whether the action term has a debug visualization implemented.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: ActionTermCfg, env: ManagerBasedEnv)

Initialize the action term.

Parameters:

• cfg – The configuration object.

• env – The environment instance.

abstract property action_dim: int

Dimension of the action term.

abstract property raw_actions: torch.Tensor

The input/raw actions sent to the term.

abstract property processed_actions: torch.Tensor

The actions computed by the term after applying any processing.

property has_debug_vis_implementation: bool

Whether the action term has a debug visualization implemented.

set_debug_vis(debug_vis: bool) → bool

Sets whether to visualize the action term data. :param debug_vis: Whether to visualize the action term data.

Returns:

Whether the debug visualization was successfully set. False if the action term does not support debug visualization.

abstract process_actions(actions: torch.Tensor)

Processes the actions sent to the environment.

Note

This function is called once per environment step by the manager.

Parameters:

actions – The actions to process.

abstract apply_actions()

Applies the actions to the asset managed by the term.

Note

This is called at every simulation step by the manager.

property device: str

Device on which to perform computations.

property num_envs: int

Number of environments.

reset(env_ids: Sequence[int] | None = None) → None

Resets the manager term.

Parameters:

env_ids – The environment ids. Defaults to None, in which case all environments are considered.

class omni.isaac.lab.managers.ActionTermCfg

Configuration for an action term.

Attributes:

class_type	The associated action term class.
asset_name	The name of the scene entity.
debug_vis	Whether to visualize debug information.

class_type: type[ActionTerm]

The associated action term class.

The class should inherit from omni.isaac.lab.managers.action_manager.ActionTerm.

asset_name: str

The name of the scene entity.

This is the name defined in the scene configuration file. See the InteractiveSceneCfg class for more details.

debug_vis: bool

Whether to visualize debug information. Defaults to False.

Event Manager

class omni.isaac.lab.managers.EventManager

Bases: ManagerBase

Manager for orchestrating operations based on different simulation events.

The event manager applies operations to the environment based on different simulation events. For example, changing the masses of objects or their friction coefficients during initialization/ reset, or applying random pushes to the robot at a fixed interval of steps. The user can specify several modes of events to fine-tune the behavior based on when to apply the event.

The event terms are parsed from a config class containing the manager’s settings and each term’s parameters. Each event term should instantiate the EventTermCfg class.

Event terms can be grouped by their mode. The mode is a user-defined string that specifies when the event term should be applied. This provides the user complete control over when event terms should be applied.

For a typical training process, you may want to apply events in the following modes:

• “startup”: Event is applied once at the beginning of the training.

• “reset”: Event is applied at every reset.

• “interval”: Event is applied at pre-specified intervals of time.

However, you can also define your own modes and use them in the training process as you see fit. For this you will need to add the triggering of that mode in the environment implementation as well.

Note

The triggering of operations corresponding to the mode "interval" are the only mode that are directly handled by the manager itself. The other modes are handled by the environment implementation.

Methods:

__init__(cfg, env)	Initialize the event manager.
reset([env_ids])	Resets the manager and returns logging information for the current time-step.
apply(mode[, env_ids, dt, global_env_step_count])	Calls each event term in the specified mode.
set_term_cfg(term_name, cfg)	Sets the configuration of the specified term into the manager.
get_term_cfg(term_name)	Gets the configuration for the specified term.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

active_terms	Name of active event terms.
available_modes	Modes of events.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedEnv)

Initialize the event manager.

Parameters:

• cfg – A configuration object or dictionary (dict[str, EventTermCfg]).

• env – An environment object.

property active_terms: dict[str, list[str]]

Name of active event terms.

The keys are the modes of event and the values are the names of the event terms.

property available_modes: list[str]

Modes of events.

reset(env_ids: Sequence[int] | None = None) → dict[str, float]

Resets the manager and returns logging information for the current time-step.

Parameters:

env_ids – The environment ids for which to log data. Defaults None, which logs data for all environments.

Returns:

Dictionary containing the logging information.

apply(mode: str, env_ids: Sequence[int] | None = None, dt: float | None = None, global_env_step_count: int | None = None)

Calls each event term in the specified mode.

This function iterates over all the event terms in the specified mode and calls the function corresponding to the term. The function is called with the environment instance and the environment indices to apply the event to.

For the “interval” mode, the function is called when the time interval has passed. This requires specifying the time step of the environment.

For the “reset” mode, the function is called when the mode is “reset” and the total number of environment steps that have happened since the last trigger of the function is equal to its configured parameter for the number of environment steps between resets.

Parameters:

• mode – The mode of event.

• env_ids – The indices of the environments to apply the event to. Defaults to None, in which case the event is applied to all environments when applicable.

• dt – The time step of the environment. This is only used for the “interval” mode. Defaults to None to simplify the call for other modes.

• global_env_step_count – The total number of environment steps that have happened. This is only used for the “reset” mode. Defaults to None to simplify the call for other modes.

Raises:

• ValueError – If the mode is "interval" and the time step is not provided.

• ValueError – If the mode is "interval" and the environment indices are provided. This is an undefined behavior as the environment indices are computed based on the time left for each environment.

• ValueError – If the mode is "reset" and the total number of environment steps that have happened is not provided.

set_term_cfg(term_name: str, cfg: EventTermCfg)

Sets the configuration of the specified term into the manager.

The method finds the term by name by searching through all the modes. It then updates the configuration of the term with the first matching name.

Parameters:

• term_name – The name of the event term.

• cfg – The configuration for the event term.

Raises:

ValueError – If the term name is not found.

get_term_cfg(term_name: str) → EventTermCfg

Gets the configuration for the specified term.

The method finds the term by name by searching through all the modes. It then returns the configuration of the term with the first matching name.

Parameters:

term_name – The name of the event term.

Returns:

The configuration of the event term.

Raises:

ValueError – If the term name is not found.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.EventTermCfg

Configuration for a event term.

Attributes:

params	The parameters to be passed to the function as keyword arguments.
func	The name of the function to be called.
mode	The mode in which the event term is applied.
interval_range_s	The range of time in seconds at which the term is applied.
is_global_time	Whether randomization should be tracked on a per-environment basis.
min_step_count_between_reset	The number of environment steps after which the term is applied since its last application.

params: dict[str, Any | SceneEntityCfg]

The parameters to be passed to the function as keyword arguments. Defaults to an empty dict.

Note

If the value is a SceneEntityCfg object, the manager will query the scene entity from the InteractiveScene and process the entity’s joints and bodies as specified in the SceneEntityCfg object.

func: Callable[..., None]

The name of the function to be called.

This function should take the environment object, environment indices and any other parameters as input.

mode: str

The mode in which the event term is applied.

Note

The mode name "interval" is a special mode that is handled by the manager Hence, its name is reserved and cannot be used for other modes.

interval_range_s: tuple[float, float] | None

The range of time in seconds at which the term is applied. Defaults to None.

Based on this, the interval is sampled uniformly between the specified range for each environment instance. The term is applied on the environment instances where the current time hits the interval time.

Note

This is only used if the mode is "interval".

is_global_time: bool

Whether randomization should be tracked on a per-environment basis. Defaults to False.

If True, the same interval time is used for all the environment instances. If False, the interval time is sampled independently for each environment instance and the term is applied when the current time hits the interval time for that instance.

Note

This is only used if the mode is "interval".

min_step_count_between_reset: int

The number of environment steps after which the term is applied since its last application. Defaults to 0.

When the mode is “reset”, the term is only applied if the number of environment steps since its last application exceeds this quantity. This helps to avoid calling the term too often, thereby improving performance.

If the value is zero, the term is applied on every call to the manager with the mode “reset”.

Note

This is only used if the mode is "reset".

Command Manager

class omni.isaac.lab.managers.CommandManager

Manager for generating commands.

The command manager is used to generate commands for an agent to execute. It makes it convenient to switch between different command generation strategies within the same environment. For instance, in an environment consisting of a quadrupedal robot, the command to it could be a velocity command or position command. By keeping the command generation logic separate from the environment, it is easy to switch between different command generation strategies.

The command terms are implemented as classes that inherit from the CommandTerm class. Each command generator term should also have a corresponding configuration class that inherits from the CommandTermCfg class.

Methods:

__init__(cfg, env)	Initialize the command manager.
set_debug_vis(debug_vis)	Sets whether to visualize the command data.
reset([env_ids])	Reset the command terms and log their metrics.
compute(dt)	Updates the commands.
get_command(name)	Returns the command for the specified command term.
get_term(name)	Returns the command term with the specified name.

Attributes:

active_terms	Name of active command terms.
has_debug_vis_implementation	Whether the command terms have debug visualization implemented.

__init__(cfg: object, env: ManagerBasedRLEnv)

Initialize the command manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, CommandTermCfg]).

• env – The environment instance.

property active_terms: list[str]

Name of active command terms.

property has_debug_vis_implementation: bool

Whether the command terms have debug visualization implemented.

set_debug_vis(debug_vis: bool) → bool

Sets whether to visualize the command data.

Parameters:

debug_vis – Whether to visualize the command data.

Returns:

Whether the debug visualization was successfully set. False if the command generator does not support debug visualization.

reset(env_ids: Sequence[int] | None = None) → dict[str, torch.Tensor]

Reset the command terms and log their metrics.

This function resets the command counter and resamples the command for each term. It should be called at the beginning of each episode.

Parameters:

env_ids – The list of environment IDs to reset. Defaults to None.

Returns:

A dictionary containing the information to log under the “Metrics/{term_name}/{metric_name}” key.

compute(dt: float)

Updates the commands.

This function calls each command term managed by the class.

Parameters:

dt – The time-step interval of the environment.

get_command(name: str) → torch.Tensor

Returns the command for the specified command term.

Parameters:

name – The name of the command term.

Returns:

The command tensor of the specified command term.

get_term(name: str) → CommandTerm

Returns the command term with the specified name.

Parameters:

name – The name of the command term.

Returns:

The command term with the specified name.

class omni.isaac.lab.managers.CommandTerm

The base class for implementing a command term.

A command term is used to generate commands for goal-conditioned tasks. For example, in the case of a goal-conditioned navigation task, the command term can be used to generate a target position for the robot to navigate to.

It implements a resampling mechanism that allows the command to be resampled at a fixed frequency. The resampling frequency can be specified in the configuration object. Additionally, it is possible to assign a visualization function to the command term that can be used to visualize the command in the simulator.

Attributes:

command	The command tensor.
has_debug_vis_implementation	Whether the command generator has a debug visualization implemented.

Methods:

set_debug_vis(debug_vis)	Sets whether to visualize the command data.
reset([env_ids])	Reset the command generator and log metrics.
compute(dt)	Compute the command.

abstract property command: torch.Tensor

The command tensor. Shape is (num_envs, command_dim).

property has_debug_vis_implementation: bool

Whether the command generator has a debug visualization implemented.

set_debug_vis(debug_vis: bool) → bool

Sets whether to visualize the command data.

Parameters:

debug_vis – Whether to visualize the command data.

Returns:

Whether the debug visualization was successfully set. False if the command generator does not support debug visualization.

reset(env_ids: Sequence[int] | None = None) → dict[str, float]

Reset the command generator and log metrics.

This function resets the command counter and resamples the command. It should be called at the beginning of each episode.

Parameters:

env_ids – The list of environment IDs to reset. Defaults to None.

Returns:

A dictionary containing the information to log under the “{name}” key.

compute(dt: float)

Compute the command.

Parameters:

dt – The time step passed since the last call to compute.

class omni.isaac.lab.managers.CommandTermCfg

Configuration for a command generator term.

Attributes:

resampling_time_range	Time before commands are changed [s].
debug_vis	Whether to visualize debug information.

resampling_time_range: tuple[float, float]

Time before commands are changed [s].

debug_vis: bool

Whether to visualize debug information. Defaults to False.

Reward Manager

class omni.isaac.lab.managers.RewardManager

Bases: ManagerBase

Manager for computing reward signals for a given world.

The reward manager computes the total reward as a sum of the weighted reward terms. The reward terms are parsed from a nested config class containing the reward manger’s settings and reward terms configuration.

The reward terms are parsed from a config class containing the manager’s settings and each term’s parameters. Each reward term should instantiate the RewardTermCfg class.

Note

The reward manager multiplies the reward term’s weight with the time-step interval dt of the environment. This is done to ensure that the computed reward terms are balanced with respect to the chosen time-step interval in the environment.

Methods:

__init__(cfg, env)	Initialize the reward manager.
reset([env_ids])	Returns the episodic sum of individual reward terms.
compute(dt)	Computes the reward signal as a weighted sum of individual terms.
set_term_cfg(term_name, cfg)	Sets the configuration of the specified term into the manager.
get_term_cfg(term_name)	Gets the configuration for the specified term.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

active_terms	Name of active reward terms.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedRLEnv)

Initialize the reward manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, RewardTermCfg]).

• env – The environment instance.

property active_terms: list[str]

Name of active reward terms.

reset(env_ids: Sequence[int] | None = None) → dict[str, torch.Tensor]

Returns the episodic sum of individual reward terms.

Parameters:

env_ids – The environment ids for which the episodic sum of individual reward terms is to be returned. Defaults to all the environment ids.

Returns:

Dictionary of episodic sum of individual reward terms.

compute(dt: float) → torch.Tensor

Computes the reward signal as a weighted sum of individual terms.

This function calls each reward term managed by the class and adds them to compute the net reward signal. It also updates the episodic sums corresponding to individual reward terms.

Parameters:

dt – The time-step interval of the environment.

Returns:

The net reward signal of shape (num_envs,).

set_term_cfg(term_name: str, cfg: RewardTermCfg)

Sets the configuration of the specified term into the manager.

Parameters:

• term_name – The name of the reward term.

• cfg – The configuration for the reward term.

Raises:

ValueError – If the term name is not found.

get_term_cfg(term_name: str) → RewardTermCfg

Gets the configuration for the specified term.

Parameters:

term_name – The name of the reward term.

Returns:

The configuration of the reward term.

Raises:

ValueError – If the term name is not found.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.RewardTermCfg

Configuration for a reward term.

Methods:

__new__(**kwargs)

__new__(**kwargs)

Termination Manager

class omni.isaac.lab.managers.TerminationManager

Bases: ManagerBase

Manager for computing done signals for a given world.

The termination manager computes the termination signal (also called dones) as a combination of termination terms. Each termination term is a function which takes the environment as an argument and returns a boolean tensor of shape (num_envs,). The termination manager computes the termination signal as the union (logical or) of all the termination terms.

Following the Gymnasium API, the termination signal is computed as the logical OR of the following signals:

• Time-out: This signal is set to true if the environment has ended after an externally defined condition (that is outside the scope of a MDP). For example, the environment may be terminated if the episode has timed out (i.e. reached max episode length).

• Terminated: This signal is set to true if the environment has reached a terminal state defined by the environment. This state may correspond to task success, task failure, robot falling, etc.

These signals can be individually accessed using the time_outs and terminated properties.

The termination terms are parsed from a config class containing the manager’s settings and each term’s parameters. Each termination term should instantiate the TerminationTermCfg class. The term’s configuration TerminationTermCfg.time_out decides whether the term is a timeout or a termination term.

Methods:

__init__(cfg, env)	Initializes the termination manager.
reset([env_ids])	Returns the episodic counts of individual termination terms.
compute()	Computes the termination signal as union of individual terms.
get_term(name)	Returns the termination term with the specified name.
set_term_cfg(term_name, cfg)	Sets the configuration of the specified term into the manager.
get_term_cfg(term_name)	Gets the configuration for the specified term.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

active_terms	Name of active termination terms.
dones	The net termination signal.
time_outs	The timeout signal (reaching max episode length).
terminated	The terminated signal (reaching a terminal state).
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedRLEnv)

Initializes the termination manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, TerminationTermCfg]).

• env – An environment object.

property active_terms: list[str]

Name of active termination terms.

property dones: torch.Tensor

The net termination signal. Shape is (num_envs,).

property time_outs: torch.Tensor

The timeout signal (reaching max episode length). Shape is (num_envs,).

This signal is set to true if the environment has ended after an externally defined condition (that is outside the scope of a MDP). For example, the environment may be terminated if the episode has timed out (i.e. reached max episode length).

property terminated: torch.Tensor

The terminated signal (reaching a terminal state). Shape is (num_envs,).

This signal is set to true if the environment has reached a terminal state defined by the environment. This state may correspond to task success, task failure, robot falling, etc.

reset(env_ids: Sequence[int] | None = None) → dict[str, torch.Tensor]

Returns the episodic counts of individual termination terms.

Parameters:

env_ids – The environment ids. Defaults to None, in which case all environments are considered.

Returns:

Dictionary of episodic sum of individual reward terms.

compute() → torch.Tensor

Computes the termination signal as union of individual terms.

This function calls each termination term managed by the class and performs a logical OR operation to compute the net termination signal.

Returns:

The combined termination signal of shape (num_envs,).

get_term(name: str) → torch.Tensor

Returns the termination term with the specified name.

Parameters:

name – The name of the termination term.

Returns:

The corresponding termination term value. Shape is (num_envs,).

set_term_cfg(term_name: str, cfg: TerminationTermCfg)

Sets the configuration of the specified term into the manager.

Parameters:

• term_name – The name of the termination term.

• cfg – The configuration for the termination term.

Raises:

ValueError – If the term name is not found.

get_term_cfg(term_name: str) → TerminationTermCfg

Gets the configuration for the specified term.

Parameters:

term_name – The name of the termination term.

Returns:

The configuration of the termination term.

Raises:

ValueError – If the term name is not found.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.TerminationTermCfg

Configuration for a termination term.

Attributes:

params	The parameters to be passed to the function as keyword arguments.
func	The name of the function to be called.
time_out	Whether the termination term contributes towards episodic timeouts.

params: dict[str, Any | SceneEntityCfg]

The parameters to be passed to the function as keyword arguments. Defaults to an empty dict.

Note

If the value is a SceneEntityCfg object, the manager will query the scene entity from the InteractiveScene and process the entity’s joints and bodies as specified in the SceneEntityCfg object.

func: Callable[..., torch.Tensor]

The name of the function to be called.

This function should take the environment object and any other parameters as input and return the termination signals as torch boolean tensors of shape (num_envs,).

time_out: bool

Whether the termination term contributes towards episodic timeouts. Defaults to False.

Note

These usually correspond to tasks that have a fixed time limit.

Curriculum Manager

class omni.isaac.lab.managers.CurriculumManager

Bases: ManagerBase

Manager to implement and execute specific curricula.

The curriculum manager updates various quantities of the environment subject to a training curriculum by calling a list of terms. These help stabilize learning by progressively making the learning tasks harder as the agent improves.

The curriculum terms are parsed from a config class containing the manager’s settings and each term’s parameters. Each curriculum term should instantiate the CurriculumTermCfg class.

Methods:

__init__(cfg, env)	Initialize the manager.
reset([env_ids])	Returns the current state of individual curriculum terms.
compute([env_ids])	Update the curriculum terms.
find_terms(name_keys)	Find terms in the manager based on the names.

Attributes:

active_terms	Name of active curriculum terms.
device	Device on which to perform computations.
num_envs	Number of environments.

__init__(cfg: object, env: ManagerBasedRLEnv)

Initialize the manager.

Parameters:

• cfg – The configuration object or dictionary (dict[str, CurriculumTermCfg])

• env – An environment object.

Raises:

• TypeError – If curriculum term is not of type CurriculumTermCfg.

• ValueError – If curriculum term configuration does not satisfy its function signature.

property active_terms: list[str]

Name of active curriculum terms.

reset(env_ids: Sequence[int] | None = None) → dict[str, float]

Returns the current state of individual curriculum terms.

Note

This function does not use the environment indices env_ids and logs the state of all the terms. The argument is only present to maintain consistency with other classes.

Returns:

Dictionary of curriculum terms and their states.

compute(env_ids: Sequence[int] | None = None)

Update the curriculum terms.

This function calls each curriculum term managed by the class.

Parameters:

env_ids – The list of environment IDs to update. If None, all the environments are updated. Defaults to None.

property device: str

Device on which to perform computations.

find_terms(name_keys: str | Sequence[str]) → list[str]

Find terms in the manager based on the names.

This function searches the manager for terms based on the names. The names can be specified as regular expressions or a list of regular expressions. The search is performed on the active terms in the manager.

Please check the omni.isaac.lab.utils.string_utils.resolve_matching_names() function for more information on the name matching.

Parameters:

name_keys – A regular expression or a list of regular expressions to match the term names.

Returns:

A list of term names that match the input keys.

property num_envs: int

Number of environments.

class omni.isaac.lab.managers.CurriculumTermCfg

Configuration for a curriculum term.

Attributes:

func	The name of the function to be called.
params	The parameters to be passed to the function as keyword arguments.

func: Callable[..., float | dict[str, float] | None]

The name of the function to be called.

This function should take the environment object, environment indices and any other parameters as input and return the curriculum state for logging purposes. If the function returns None, the curriculum state is not logged.

params: dict[str, Any | SceneEntityCfg]

The parameters to be passed to the function as keyword arguments. Defaults to an empty dict.

Note

If the value is a SceneEntityCfg object, the manager will query the scene entity from the InteractiveScene and process the entity’s joints and bodies as specified in the SceneEntityCfg object.