With this code, you can align all the nodes you have selected. You can either align them in X or align them in Y. The hotkey I use is ctrl+l for horizontal alignment, and crtl+shift+l for vertical.
I like my scripts to be as organized as I can have them, and this code makes it super easy to make sure the connections have straight lines.
Expand Align Nodes
import nuke
def alignY():
selected = nuke.selectedNodes()
yPosList = []
heightList = []
for i in selected:
yPos = i['ypos'].getValue()
yPosList.append(yPos)
height = i.screenHeight()/2
heightList.append(height)
avrgYPos = sum(yPosList)/len(yPosList)
print 'Average Position is %s' % avrgYPos
lowestHeight = min(heightList)
print 'Lowest Height is %s' % lowestHeight
for i in selected:
if i.screenHeight()/2 == lowestHeight:
i['ypos'].setValue(avrgYPos)
else:
newHeight = i.screenHeight()/2 - lowestHeight
i['ypos'].setValue(avrgYPos-newHeight)
def alignX():
selected = nuke.selectedNodes()
xPosList = []
widthList = []
for i in selected:
xPos = i['xpos'].getValue()
xPosList.append(xPos)
width = i.screenWidth()/2
widthList.append(width)
avrgXPos = sum(xPosList)/len(xPosList)
print 'Average Position is %s' % avrgXPos
lowestWidth = min(widthList)
print 'Lowest Width is %s' % lowestWidth
for i in selected:
if i.screenWidth()/2 == lowestWidth:
i['xpos'].setValue(avrgXPos)
else:
newWidth = i.screenWidth()/2 - lowestWidth
i['xpos'].setValue(avrgXPos-newWidth)