SCALING NODE TREE

This code lets you scale up and down the space between the nodes you have selected on your Node Tree. I made this code while training and learning Python, and I find it super useful when I need to create room for new nodes. I have them set on ctrl++ and ctrl+- for the small scale, and crtl+shift++ and ctrl+shift+- for the big one.

Expand Scale Nodes

import nuke

def scaleNodes():
    nodes = nuke.selectedNodes()
    amount = len(nodes)
    # Do nothing if no nodes were selected
    if amount == 0:    return
    # Sum all the X values
    allX = sum([n.xpos()+n.screenWidth()/2 for n in nodes])
    #Sum all the Y values
    allY = sum([n.ypos()+n.screenHeight()/2 for n in nodes])
    # Center of selected nodes
    centreX = allX/amount
    centreY = allY/amount
    # Return values to use outside this function
    return centreX, centreY
def increase2():
    # Set values with scaleNodes() function
    centreX, centreY = scaleNodes()
    for n in nuke.selectedNodes():
        n.setXpos(centreX + (n.xpos() - centreX) * 2)
        n.setYpos(centreY + (n.ypos() - centreY) * 2)
def increase8():
    # Set values with scaleNodes() function
    centreX, centreY = scaleNodes()
    for n in nuke.selectedNodes():
        n.setXpos(centreX + (n.xpos() - centreX) * 8)
        n.setYpos(centreY + (n.ypos() - centreY) * 8)
def decrease2():
    # Set values with scaleNodes() function
    centreX, centreY = scaleNodes()
    for n in nuke.selectedNodes():
        n.setXpos(centreX + (n.xpos() - centreX) / 2)
        n.setYpos(centreY + (n.ypos() - centreY) / 2)
def decrease8():
    # Set values with scaleNodes() function
    centreX, centreY = scaleNodes()
    for n in nuke.selectedNodes():
        n.setXpos(centreX + (n.xpos() - centreX) / 8)
        n.setYpos(centreY + (n.ypos() - centreY) / 8)