editor.niagara

Niagara particle system editing

`editor.niagara.getInfo`

Returns basic information about a Niagara system.

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path

Returns

Field	Type	Description
`system_name`	string	System name
`num_emitters`	number	Number of emitters
`is_valid`	bool	Whether system is valid
`is_ready_to_run`	bool	Whether system is compiled and ready
`has_outstanding_compilation`	bool	Whether compilation is pending

Example Request

{ "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.getInfo", "params": { "asset_path": "/Game/FX/NS_Fire" } }

`editor.niagara.getEmitters`

Returns all emitters in a Niagara system.

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path

Returns

Field	Type	Description
`emitters`	array	Each: {emitter_name, emitter_index, is_enabled, sim_target}
`count`	number	Number of emitters

Example Request

{ "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.getEmitters", "params": { "asset_path": "/Game/FX/NS_Fire" } }

`editor.niagara.create`

Creates a new Niagara system asset.

Name	Type	Required	Description
`path`	string	Yes	Content directory (e.g. "/Game/FX")
`name`	string	Yes	System name

Returns

Field	Type	Description
`success`	bool	Whether creation succeeded
`asset_path`	string	Full asset path

Example Request

{ "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.create", "params": { "path": "/Game/FX", "name": "NS_Smoke" } }

`editor.niagara.getParameters`

Returns all user-exposed parameters in a Niagara system.

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path

Returns

Field	Type	Description
`parameters`	array	Each: {param_name, param_type, default_value}
`count`	number	Number of parameters

Example Request

{ "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.getParameters", "params": { "asset_path": "/Game/FX/NS_Fire" } }

`editor.niagara.setParameter`

Sets a parameter value in a Niagara system (supports float, int, bool).

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path
`param_name`	string	Yes	Parameter name
`value`	varies	Yes	Parameter value (number, bool, etc.)

Returns

Field	Type	Description
`success`	bool	Whether parameter was set

Example Request

{
  "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.setParameter",
  "params": { "asset_path": "/Game/FX/NS_Fire", "param_name": "SpawnRate", "value": 100.0 }
}

`editor.niagara.setEmitterEnabled`

Enables or disables an emitter in a Niagara system.

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path
`enabled`	bool	Yes	Whether emitter should be enabled
`emitter_index`	number	No*	Emitter index
`emitter_name`	string	No*	Emitter name

*One of emitter_index or emitter_name must be provided.

Returns

Field	Type	Description
`success`	bool	Whether state was changed
`changed`	bool	Whether the enabled state actually changed

Example Request

{
  "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.setEmitterEnabled",
  "params": { "asset_path": "/Game/FX/NS_Fire", "emitter_name": "Sparks", "enabled": false }
}

`editor.niagara.compile`

Compiles a Niagara system and waits for completion.

Name	Type	Required	Description
`asset_path`	string	Yes	Niagara system asset path

Returns

Field	Type	Description
`success`	bool	Whether compilation succeeded
`is_ready_to_run`	bool	Whether system is ready after compile
`has_outstanding_compilation`	bool	Whether compilation is still pending
`errors`	array	Compilation errors (empty if none)

Example Request

{ "jsonrpc": "2.0", "id": 1, "method": "editor.niagara.compile", "params": { "asset_path": "/Game/FX/NS_Fire" } }