用于Nuke的Python：选择当前的节点

Question

如何在当前选择的节点之前通过python选择节点？

例如，我想在所有“写入”之前添加一个“Clamp”节点。

Answer 1

该代码片段允许您定义节点上游现有的写入节点。

import nuke 

iNode = nuke.toNode('Write1') 

def upstream(iNode, maxDeep=-1, found=None): 

    if found is None: 
     found = set() 
    if maxDeep != 0: 
     willFind = set(z for z in iNode.dependencies() if z not in found) 
     found.update(willFind) 

     for depth in willFind: 
      upstream(depth, maxDeep+1, found) 

    return found 

然后调用方法upstream(iNode)。

而且剧本的片段你送我早应该是这样的：

allWrites = nuke.allNodes('Grade') 
depNodes = nuke.selectedNode().dependencies() 

for depNode in depNodes: 
    depNode.setSelected(True) 

queueElem = len(allWrites) 
trigger = -1 

for i in range(1,queueElem+1): 
    trigger += 1 

    for write in allWrites[(0+trigger):(1+trigger)]: 
     write.setSelected(True) 
     nuke.createNode("Clamp") 

     for all in nuke.allNodes(): 
      all.setSelected(False)