A Python script to dynamically switch selected nodes between horizontal and vertical alignment using the 'L' shortcut, with configurable spacing.

nuke_toggle_nodes_alignment.py

import nuke


def toggle_nodes_alignment(spacing=100):
    """Toggle the alignment of selected nodes between horizontal and vertical.

    Args:
        spacing (int): The spacing between nodes after alignment.
    """
    nodes = nuke.selectedNodes()
    if not nodes:
        return

    # Check if nodes are aligned horizontally by comparing y positions
    is_horizontal_align = all(node.ypos() == nodes[0].ypos() for node in nodes)
    
    if is_horizontal_align:
        # If aligned horizontally, align them vertically
        align_nodes_vertically(nodes, spacing)
    else:
        # If not aligned horizontally, align them horizontally
        align_nodes_horizontally(nodes, spacing)

def align_nodes_vertically(nodes, spacing=100):
    """Align nodes vertically with specified spacing.

    Args:
        nodes (list): A list of node objects to be aligned.
        spacing (int): The vertical spacing between nodes.
    """
    nodes.sort(key=lambda node: node.xpos())
    x_pos = nodes[0].xpos()

    for index, node in enumerate(nodes):
        node.setXpos(x_pos)
        node.setYpos(nodes[0].ypos() + index * spacing)

def align_nodes_horizontally(nodes, spacing=100):
    """Align nodes horizontally with specified spacing.

    Args:
        nodes (list): A list of node objects to be aligned.
        spacing (int): The horizontal spacing between nodes.
    """
    nodes.sort(key=lambda node: node.ypos())
    y_pos = nodes[0].ypos()

    for index, node in enumerate(nodes):
        node.setYpos(y_pos)
        node.setXpos(nodes[0].xpos() + index * spacing)


if __name__ == '__main__':
    # Add the command to Nuke's menu with a keyboard shortcut
    nuke.menu('Nuke').addCommand('Edit/Node/Toggle Nodes Alignment', toggle_nodes_alignment, 'L')