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Since | 18.0 |
This node reads a USD file or LOP node and creates work items based on search criteria. The search is done on the composed stage of the specified input USD or LOP.
TOP Attributes
|
string |
The name of the primitive. |
|
string |
The full path to the primitive. |
Parameters
Create Attributes
Generate When
Determines when this node will generate work items. You should generally leave this set to “Automatic” unless you know the node requires a specific generation mode, or that the work items need to be generated dynamically.
All Upstream Items are Generated
This node will generate work items once all of the input nodes have generated their work items.
All Upstream Items are Cooked
This node will generate work items once all of the input nodes have cooked their work items.
Each Upstream Item is Cooked
This node will generate work items each time a work item in an input node is cooked.
Automatic
The generation mode is selected based on the generation mode of the input nodes. If any of the input nodes are generating work items when their inputs cook, this node will be set to Each Upstream Item is Cooked. Otherwise, it will be set to All Upstream Items are Generated.
The input the node reads to create the work items.
USD
Determines the source of the USD file or LOP node.
Custom File Path
Uses the USD file specified by the custom file path.
Upstream Output File
Uses the output file produced by the upstream work item as the path to the USD file.
LOP Node
Reads the composed stage from the specified LOP node.
File Tag
The data tag that identifies the result from the upstream work item.
This parameter is only available when USD is set to Upstream Output File.
File Path
The path to the USD file to be read.
This parameter is only available when USD is set to Custom File Path.
Add File Path to Outputs
When on, this parameter determines whether or not the file path should be added as an output file to work items on this node.
This parameter is only available when USD is set to either Custom File Path or Upstream Output File.
LOP Path
The path to the LOP node from which to read the composed stage.
This parameter is only available when USD is set to LOP Node.
The search criteria the node uses to create the work items.
Primitives
The Primitive Matching Pattern to apply to the specified input stage.
Evaluation Time
Determines how attribute keyframe values from the input stage are interpolated.
Work Item Frame
Uses the frame on the generated work item.
Custom Time
Uses the given time in seconds.
Houdini Time
Uses the Houdini playbar time.
Strip Layers Preceding Layer Break
When on, any layers preceding a
Layer Break LOP node connected directly or indirectly to the requested LOP node will be stripped from the USD stage before importing the stage.
This parameter is only applicable when the input is a LOP node.
Prim Path
When on, adds the specified string attribute to the primitive path.
Prim Name
When on, adds the specified string attribute to the primitive name.
Import Attributes
Specifies the attribute pattern to use to identify which USD attributes to extract and then extracts those attributes.
Note
The :type
syntax is not supported.
Import Relationships
Specifies the attribute pattern to use to identify which USD relationships should be copied to work item attributes.
Note
The :type
syntax is not supported.
Examples
USDImport Example for USD Import TOP node
This example demonstrates how to generate work items from primitives in a LOP stage using the USD Import TOP node.
See also |