Houdini 18.0 Nodes TOP nodes

Split TOP node

Splits upstream items in two

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This node uses an expression to split upstream work items into two groups. The work items that match the condition are pass to the left input and the items that don’t are passed on the right.


Work Item Generation

Whether this node generates static or dynamic work items. You should generally leave this set to "Automatic" unless you know the node’s work items can be computed statically, or that they need to be generated dynamically.


This node always creates dynamic work items: it waits until the upstream work items are known, and generates new work items from the upstream work items.


This node always creates static work items: it creates the number of work items it thinks it needs based on the parameters (and any upstream static items) before the network runs.


If the input is static (a static processor, or a partitioner with only static inputs, or a mapper), this node generates static work items, otherwise it generates dynamic work items.

Split Expression

This parameter is evaluated for each upstream work item to determine which output the item should appear on. If the expression returns a non-zero value the work item will appear on the left output, otherwise it will appear on the right output.

Invert Selection

Inverts the behavior of the node. Work items that match the Split Expression will appear on the right output, and work items that fail to match will appear on the left.


example_top_split Example for Split TOP node

This example demonstrates how to use the split node in PDG/TOPs.

See also

TOP nodes