For Each

Overview

The For Each system (comprising the Begin and End nodes) allows you to perform iterative operations on a mesh. It breaks a mesh down into smaller components—such as individual faces or vertices—processes them through a series of nodes, and then merges them back together.

---

Inputs & Outputs

Begin Node

Name	Type	Description
Input	MeshData	The source mesh to be iterated over.
Iteration	int	The current iteration index in the loop.
Output: Element	MeshData	The current sub-mesh or component being processed in the loop.
Output: Index	int	The current iteration count.

End Node

Name	Type	Description
Input	MeshData	The processed mesh data coming from the final node within the loop.
Output: Output	MeshData	The final combined result of all iterations.

---

Parameters

Name	Type	Description
Element to Iterate	Element	Defines the "chunk" size for iteration (e.g., iterate per Point, per Face, Number, or ConnectedPiece).

---

Behavior Notes

• Any nodes placed between the Begin and End nodes are executed repeatedly. For each iteration, the Begin node sends a single "Element" (like one triangle) through the chain.
• The End node acts as an accumulator. Once all iterations are complete, it stitches the results back into a single MeshData object.
• By using the Index output from the Begin node, you can introduce variation in each loop—for example, scaling each face based on its index using a math node.
• Loops are powerful but computationally expensive. Iterating over thousands of individual faces can significantly increase graph evaluation time.

---