Engine API - Calls

Introduction

The following document presents all the endpoints callable via Data Hub on a running Engine instance. All changes are applied immediately. However, changes to some properties of the World Settings in Live mode might result in a restart of Pixotope modules and a brief reduction in performance.

To learn about more advanced usage of these endpoints jump to: Advanced RPC Usage.

Object Setting

Calls allowing for scene manipulation.

SetProperty

Set a property value for a given actor. Apart from basic types, supports properties in structs, arrays and asset names.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.
Value	STRING STRING ARRAY ANY	The value to be applied. Strings are parsed into proper formats, but raw numbers should be (for the most part) supported too. If provided with an array will try to match to the array of PropertyPaths. Supports struct imports in both a format of JSON or the Unreal's text import format.
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`
ApplyClamp	BOOL OPTIONAL	Should we apply clamp values defined in property's metadata. Default: `false`

Example 1 - Set intensity on a light component.

Call (you send) Topic: { "Type": "Call", "Target": "TJCGWS040-Engine", "RespondTo": "TJCGWS040-TestClient", "Method": "SetProperty", "ID": "000" } Message: { "Params": { "ObjectSearch": "SpotLight_1.LightComponent0", "PropertyPath": "Intensity", "Value": 100 } }

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "TJCGWS040-TestClient", "ExecutedOn": "TJCGWS040-Engine", "Method": "SetProperty", "ID": "000" } Message: {"Result":[{}]}

Update (you can receive, if subscribed) Topic: { "Type": "Update", "Target": "BROADCAST", "Source": "TJCGWS040-Engine", "Name": "World.PropertyChanged" } Message: { "Value": { "Owner": "SpotLight_1.LightComponent0", "Name": "Intensity", "PrettyName": "Intensity", "Type": "float", "AdjustmentStatus": "MODIFIED", "Value": "100.000000" } }

Example 2 - Set intensity and color of two light components at once. Don't broadcast updates.

Call (you send) Topic: { "Type": "Call", "Target": "TJCGWS040-Engine", "RespondTo": "TJCGWS040-TestClient", "Method": "SetProperty", "ID": "000" } Message: { "Params": { "ObjectSearch": [ "SpotLight_1.LightComponent0", "SpotLight2.LightComponent0" ], "PropertyPath": [ "Intensity", "LightColor" ], "Value": [ 100, "(R=255,G=0,B=0)" ], "BroadcastUpdate": false } }

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "TJCGWS040-TestClient", "ExecutedOn": "TJCGWS040-Engine", "Method": "SetProperty", "ID": "000" } Message: {"Result":[{}]}

Example 3 - Apply blue color grading to the graphics.

Call (you send) Topic: { "Type": "Call", "Target": "TJCGWS040-Engine", "RespondTo": "TJCGWS040-TestClient", "Method": "SetProperty", "ID": "000" } Message: { "Params": { "ObjectSearch": "post_process_handler", "PropertyPath": [ "Settings.bOverride_ColorGamma", "Settings.ColorGamma.X", "Settings.ColorGamma.Y", "Settings.ColorGamma.Z" ], "Value": [ true, 0.0, 0.0, 1.0 ] } }

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "TJCGWS040-TestClient", "ExecutedOn": "TJCGWS040-Engine", "Method": "SetProperty", "ID": "000" } Message: {"Result":[{}]}

Update (you can receive, if subscribed) Topic: { "Type": "Update", "Target": "BROADCAST", "Source": "TJCGWS040-Engine", "Name": "World.PropertyChanged" } Message: { "Value": { "Owner": "PostProcessHandler_0", "ObjectSearchTag": "post_process_handler", "Path": "Settings.", "Name": "bOverride_ColorGamma", "PrettyName": "Override Color Gamma", "Type": "bool", "AdjustmentStatus": "MODIFIED", "Value": "True" } }

Update (you can receive, if subscribed) Topic: { "Type": "Update", "Target": "BROADCAST", "Source": "TJCGWS040-Engine", "Name": "World.PropertyChanged" } Message: { "Value": { "Owner": "PostProcessHandler_0", "ObjectSearchTag": "post_process_handler", "Path": "Settings.ColorGamma.", "Name": "X", "PrettyName": "X", "Type": "float", "AdjustmentStatus": "MODIFIED", "Value": "0.000000" } }

Update (you can receive, if subscribed) Topic: { "Type": "Update", "Target": "BROADCAST", "Source": "TJCGWS040-Engine", "Name": "World.PropertyChanged" } Message: { "Value": { "Owner": "PostProcessHandler_0", "ObjectSearchTag": "post_process_handler", "Path": "Settings.ColorGamma.", "Name": "Y", "PrettyName": "Y", "Type": "float", "AdjustmentStatus": "MODIFIED", "Value": "0.000000" } }

Update (you can receive, if subscribed) Topic: { "Type": "Update", "Target": "BROADCAST", "Source": "TJCGWS040-Engine", "Name": "World.PropertyChanged" } Message: { "Value": { "Owner": "PostProcessHandler_0", "ObjectSearchTag": "post_process_handler", "Path": "Settings.ColorGamma.", "Name": "Z", "PrettyName": "Z", "Type": "float", "AdjustmentStatus": "MODIFIED", "Value": "1.000000" } }

ResetProperty

Reset a property value for a given actor.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

Example - Reset the graphics color grading gamma. (Set in a SetProperty example.)

Call (you send) Topic: { "Type": "Call", "Target": "TJCGWS040-Engine", "RespondTo": "TJCGWS040-TestClient", "Method": "ResetProperty", "ID": "000" } Message: { "Params": { "ObjectSearch": "post_process_handler", "PropertyPath": "Settings.ColorGamma" } }

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "TJCGWS040-TestClient", "ExecutedOn": "TJCGWS040-Engine", "Method": "ResetProperty", "ID": "000" } Message: {"Result":[{}]}

CallFunction

Call a method on a given object. This is the main and recommended way of handling live input and controls.

Params

ObjectSearch	STRING ARRAY STRING
FunctionName	STRING
FunctionArguments	STRING ARRAY OPTIONAL

SetVisibility

Set actor's / component's visibility.

Params

ObjectSearch	STRING ARRAY STRING
BroadcastUpdate	BOOL OPTIONAL
Visibility	BOOL

ResetVisibility

Reset actor's / component's visibility.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value. `Actors only!`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

SetMobility

Set actor's / component's mobility.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value. `Actors only!`
Mobility	ENUM	Allowed values: NO_TRANSFORM, STATIC, STATIONARY, or MOVABLE
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

ResetMobility

Reset actor's / component's mobility.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value. `Actors only!`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

SetTransform

Set actor's or component's relative transform.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
Transform	FLOAT ARRAY OPTIONAL	Consecutively: `LocX, LocY, LocZ, RotX, RotY, RotZ, SclX, SclY, SclZ`. Invalid or missing values will be ignored. Can be an array longer than 9 to apply different transforms when targetting multiple objects.
Location	FLOAT ARRAY OPTIONAL	Consecutively: `LocX, LocY, LocZ`. Invalid or missing values will be ignored.
Rotation	FLOAT ARRAY OPTIONAL	Consecutively: `RotX, RotY, RotZ`. Invalid or missing values will be ignored.
Scale	FLOAT ARRAY OPTIONAL	Consecutively: `SclX, SclY, SclZ`. Invalid or missing values will be ignored.
IgnorePattern	BOOL ARRAY OPTIONAL	Allows to ignore certain values from being applied. Consecutively: `LocX, LocY, LocZ, RotX, RotY, RotZ, SclX, SclY, SclZ`. Can be an array longer than 9 to apply different ignore patterns when targetting multiple objects. Default: `all false`
IsDelta	BOOL OPTIONAL	Should given transform values be added to the exiting transform. Default: `false`
IsLocalTranslation	BOOL OPTIONAL	If IsDelta, should we add location along local axis. Default: `false`
IsLocalRotation	BOOL OPTIONAL	If IsDelta, should we add rotation along local axis. Default: `true`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

ResetTransform

Reset object's transform.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
ResetPattern	BOOL ARRAY OPTIONAL	Consecutively: `LocX, LocY, LocZ, RotX, RotY, RotZ, SclX, SclY, SclZ`. Default: `all false`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

SetRenderLayer

Set actor's or component's render layer.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`
RenderLayer	ENUM	Allowed values: `BACKGROUND, FOREGROUND, AR_HOLDOUT, AR_SHADOW_CATCHER, VS_TRANSLUCENT, AR_TRANSLUCENT`.

ResetRenderLayer

Reset actor's or component's render layer.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

ResetObject

Reset all object's adjustments.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
ShouldResetComponents	BOOL OPTIONAL	Default: `true`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

Object Spawning

A group of calls allowing for spawning and deleting actors and components from the scene.

SpawnActor

Spawn a new actor.

Params

ActorType	STRING
BroadcastUpdate	BOOL OPTIONAL

SpawnComponent

Add a component to an actor.

Params

ObjectSearch	STRING ARRAY STRING
ComponentType	STRING
BroadcastUpdate	BOOL OPTIONAL

DeleteSpawnedObject

Delete an existing actor. Works only for the actors previously spawned through the API.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value. `API-spawned Actors only!`
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

DeleteAllSpawnedActors

Delete all spawned actors.

Params

BroadcastUpdate BOOL OPTIONAL Should Engine send an Update message for changed values? Default: true

RenameSpawnedActor

Rename a previously spawned actor.

Params

ObjectSearch	STRING ARRAY STRING
NewName	STRING
BroadcastUpdate	BOOL OPTIONAL

SetActorParent

Set one actor to be another's parent.

No params.

Object Getting

Calls allowing for getting the information about the scene.

GetProperty

Send JSON describing a property to Data Hub.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.
RecursionDepth	INT OPTIONAL	Default: `1`
ForceExposeChildren	BOOL OPTIONAL	Default: `true`
PairObjectSearchesAndPropertyPaths	BOOL OPTIONAL	Default: `false`

GetFunction

Send JSON describing a function to Data Hub.

Params

ObjectSearch	STRING ARRAY STRING
FunctionName	STRING

GetTransform

Send JSON describing actor's or component's relative transform to Data Hub.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetObject

Send JSON describing an object to Data Hub.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
RecursionDepth	OPTIONAL	Default: `1`
ForceExposeProperties	OPTIONAL	Default: `false`
ForceExposeFunctions	OPTIONAL	Default: `false`

GetWorld

Send JSON describing the currently active world to Data Hub.

Params

ShouldIncludeActors	BOOL OPTIONAL	Default: `true`
RecursionDepth	INT OPTIONAL	Default: `1`
ForceExposeProperties	OPTIONAL	Default: `false`
ForceExposeFunctions	OPTIONAL	Default: `false`

Example 1 - Get World's metadata only.

Call (you send) Topic: { "Type": "Call", "Target": "XXX-Engine", "RespondTo": "XXX-Client", "Method": "GetWorld", "ID": "000" } Message: {"Params":{"ShouldIncludeActors":false}}

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "XXX-Client", "ExecutedOn": "XXX-Engine", "Method": "GetWorld", "ID": "000" } Message: { "Result": [ { "World": { "Name": "LVL_PixotopeVSSample", "PrettyName": "LVL_PixotopeVSSample", "Type": "Editor", "CompositingMode": "Internal", "IsDirty": false } } ] }

Example 2 - Get a list of actors.

Call (you send) Topic: { "Type": "Call", "Target": "XXX-Engine", "RespondTo": "XXX-Client", "Method": "GetWorld", "ID": "000" } Message: { "Params": { "ShouldIncludeActors": true, "RecursionDepth": 0 } }

CallResult (you can receive, if subscribed) Topic: { "Type": "CallResult", "Target": "XXX-Client", "ExecutedOn": "XXX-Engine", "Method": "GetWorld", "ID": "000" } Message: { "Result": [ { "World": { "Name": "LVL_PixotopeVSSample", "PrettyName": "LVL_PixotopeVSSample", "Type": "Editor", "CompositingMode": "Internal", "IsDirty": false, "Actors": [ { "Name": "WorldSettings_1", "PrettyName": "WorldSettings1", "Type": "WorldSettings", "AdjustmentStatus": "ORIGINAL", "Visibility": true, "Mobility": "NO_TRANSFORM", "RenderLayer": "NONE" } ] } } ] }

Exposing

Calls allowing fine-tune what is send from the scene in response to get calls.

ExposeProperty

Exposes a property to be visible as when calling GetObject.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.
ShouldExposePerObject	BOOL OPTIONAL	Default: `false`
ShouldExposePerClass	BOOL OPTIONAL	Default: `false`

IsPropertyExposed

Informs if a property is visible to GetObject call and how it is exposed.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.

GetAllExposedProperties

This will return only per class and per object user exposed properties. The c++ exposed ones will not show up.

Returns all properties explicitly exposed to API.

Params

IncludePropertyDetails	BOOL OPTIONAL	Default: `false`
RecursionDepth	INT OPTIONAL	Default: `1`
ForceExposeChildren	BOOL OPTIONAL	Default: `true`

ExposeFunction

Exposes a fuction per class to be visible as when calling GetObject.

Params

FunctionName	STRING
ObjectType	OPTIONAL STRING
ObjectSearch	OPTIONAL STRING
ShouldExposePerClass	BOOL

IsFunctionExposed

Informs if a function is visible to GetObject calls.

Params

FunctionName	STRING
ObjectType	OPTIONAL STRING
ObjectSearch	OPTIONAL STRING

GetAllExposedFunctions

Returns all functions explicitly exposed to API.

No params.

Adjustments

Calls exposed by the Pixotope Engine's adjustment system.

GetPropertyAdjustmentStatus

Check if a particular property was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.

GetVisibilityAdjustmentStatus

Check if a particular object's visibility was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetMobilityAdjustmentStatus

Check if a particular object's mobility was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetTransformAdjustmentStatus

Check if a particular object's transform was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetRenderLayerAdjustmentStatus

Check if a particular object's render layer was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetObjectAdjustmentStatus

Check if a particular object was modified. Possible AdjustmentStatus values: UNKNOWN, DEFAULT, MODIFIED, SPAWNED, EDITOR.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

WasObjectSpawned

Check if a particular object was spawned with API.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

WasAnyObjectSpawned

Check if any object was spawned.

No params.

WasAnythingModifed

Check if any objects, parameters or settings were modified in this world.

No params.

ClearAllAdjustments

Remove all adjustments without reseting the state of the world.

No params.

ResetAllAdjustments

Reset all adjustments applied to this world.

Params

BroadcastUpdate BOOL OPTIONAL Should Engine send an Update message for changed values? Default: true

BakeAllAdjustments

Bakes all adjustments permanently into the world. Works in the editor mode only.

No params.

Cinematic

PlaySequence

Play a given level sequence.

Params

AssetPath	STRING	Path of the sequence asset to play.
AdditionalLoops	INTEGER OPTIONAL	Number of additional loops to play. Set to -1 to loop infinitely. Default: 0

StopSequence

Stop a given level sequence.

Params

AssetPath

STRING

Path of the sequence asset to stop.

GetAvailableSequences

Returns a list of asset paths for available sequences.

No params.

Other

GetVersion

Returns Pixotope and Unreal Engine versions.

No params.

ExecuteConsoleCommand

Execute a command in the engine console.

Params

Command	STRING	An engine console command to execute.
BroadcastUpdate	BOOL OPTIONAL	Should Engine send an Update message for changed values? Default: `true`

GetCompositingMode

Send the compositing mode of current world. Possible return values: Internal, External

No params.

OpenLevel

Load a new level without closing the project.

Params

LevelPath STRING Example: Levels/TestMap0

ReopenLevel

Reload the current level without closing the project.

No params.

Kill

Closes the engine straight away.

No params.

GetAutolayout

Feature under development.

Send a list of function descriptions that were marked for auto-layouting.

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

GetSpecialObjectMappings

Get all the object names mapped to a certain object search tag.

Params

ObjectSearchTag STRING Pixotope object search tag. For example: post_process_handler.

GetAllSpecialObjectMappings

Get all the object search tags with object names mapped to them.

No params.

BroadcastWorldUpdate

Force a broadcast for a particular property.

Params

UpdateType	STRING	Only `PropertyChanged` supported for now.
ObjectSearch	STRING ARRAY STRING	Unique name of the target `Actor`, or `Actor.Component`, or a `special_tag`, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.
PropertyPath	STRING ARRAY STRING	Dot-separated path to the targeted property, or an array of such paths. Hover over the star left of your property in the Engine to learn the desired value.

SaveEditor

Trigger saving dirty editor packages.

No params.

Undo

Undo the latest editor change. Works only in edit mode.

No params.

Redo

Redo the latest undone editor change. Works only in edit mode.

No params.

HighlightObject

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

UnhighlightObject

Params

ObjectSearch STRING ARRAY STRING Unique name of the target Actor, or Actor.Component, or a special_tag, or an array of multiple object searches. Hover over the star left of your property in the Engine to learn the desired value.

UnhighlightAllObjects

No params.

Focus

No params.

Minimize

No params.

Refocus

No params.

GetCurrentTimecode

This call is scheduled for deprecation. Please subscribe to SystemInfo update instead.

Returns the current timecode if datahub is in synchronized mode. Calling this with a NoSync param set to true is recommended, to avoid the message being delayed.

No params.

Advanced RPC Usage

Object Search

Many commands take

ObjectSearch

as their first argument. It allows to target world's actors, components, and some other special objects with the commands. Typically, in order to target actors, one can just type a unique name of this actor. To find out the unique name of an actor, move the mouse over the label of the actor in

World Outliner

in the Editor, and the unique name will be shown in the tooltip.

ObjectSearch

also accepts certain predefined names for targeting special objects:

compositing_mesh
light_component
light_actor
compositing_plane
material_handler
post_process_handler
camera_root
tracked_camera
world_settings
level_blueprint
bpe_manager

Otherwise the object search will by default look for the first actor in the scene of the given name.

Alternatively, it is possible to access the following advanced search modes:

. (component search, by adding a dot after actors nameand following it with the component name, ex. SomeActor0.SomeComponent42)
all_of_type (followed by a type name will target all actors of a given type currently existing in the scene)
first_of_type (followed by a type name will target the first actor of a given type currently existing in the scene)
default_object (followed by a type name will target the default object of that type)

Property Path

PropertyPath

parameter, required by many calls, is used to target certain properties(fields) on objects. For properties existing directly in particular object's class the property path will be just this properties' name. However for children of struct properties path will consist of consecutive property names separated with a dot. For example:

Parameters.Position.X

(targeting float X in Position vector in Parameters struct).

Ignore Property Value

In case that we are sending SetProperty or SetSettings we might sometimes want our call to be ignored for particular properties. To achieve that pass

:::ignore:::

string as a value.

Call Responses

Every executed call responds with a CallResult message that holds either relevant data or an error message.

Call Result

Every successful call result coming from the Engine holds a JSON array field (called Result). It is an array because almost any executed Call can be scaled to target muliple objects.

Error

If a call fails, the call result message holds an Error field instead of Result. This field can inform on what was the reason for the failure.

Update

Certain calls can optionally broadcast meaningful Update messages throughout the network. It can be useful for keeping otherwise uninvolved client software up to date with what's happening in the engine.

Adding Adjustments

Pixotope Engine has a feature allowing all the remote changes done in Live or Live Preview to be saved and later applied on start again. In order to add your Call as an adjustment add to it a param named IsAdjustment, set to true.

Filtering Results

Often a call will return too much data, and that might take too long parsing or be just unpleasant to work with. In order to filter only the fields you are interested in from your CallResult add a param named ResultFilter, with a array of json fields you want to be sent. Dot-separated paths to particular fields are supported.
For example: ResultFilter=["Object.Components.Name"] would result in only component names being sent on GetObject.

Avoiding Frame Drops

Add an optional param ParamSplitBetweenFrames to your call to configure on which array param should we try to split between and execute every element separately in order to avoid dropping frames. This will efectively treat every element of that array param together with other params as a separate API call, but it will combine the results into a single result message.

Avoiding Synchronization Delays

It is possible to bypass synchronization (and the resulting delay) for select Calls by adding a param NoSync set to true.