python + maya：將選定節點的着色器圖形化為hypershade網絡

Question

我編寫了一個腳本，該腳本獲取選定對象正在使用的着色器。 然后，我想在Hypershade中將這些着色器繪制到網絡。 我在這里想念什么？

我設法使它在這個小片段上起作用，但在主要代碼上卻沒有...

小測試代碼段：

import maya.cmds as cmds
blinn = cmds.createNode('blinn')
cmds.hyperShade(blinn)

主要代碼：

import maya.cmds as cmds

# get selected nodes:
nodes = cmds.ls(selection=True, dag=True)
nodeCount = len(nodes)

# get shading groups from shapes:
if nodeCount >= 1:
    shadingGroups = cmds.listConnections(nodes, t='shadingEngine')
shadingGroupsCount = len(shadingGroups)

# get the shaders:
if shadingGroupsCount >= 1:
    shaders = cmds.ls(cmds.listConnections(shadingGroups), materials=1) 

# graph shaders to the network in the hypershade:
if shaders >= 1:
    cmds.hyperShade(shaders)

print shaders

Answer 1

從我可以從您的代碼確定的結果來看，您正在選擇對象的材料。

因此，這將遍歷對象並將其着色器添加到圖形中。 最初，它將在開始添加之前清除圖形，您可以通過簡單地清除標志resetGraph=True, dependGraphArea=True來刪除該功能。

import maya.cmds as cmds
import maya.mel as mel

nodes = cmds.ls(selection=True, dag=True)
## Open the panel, doesn't re-open if already up and sets focus
cmds.HypershadeWindow()
## Get the name of the hsPanel
hsPanel = cmds.getPanel(withFocus=True)
## Clear the graph
cmds.hyperShade(resetGraph=True, dependGraphArea=True)
for node in nodes:
    if len(nodes) > 0:
        ## Select a node
        cmds.select(node, r=1)
        ## List the materials assigned to the object
        cmds.hyperShade(shaderNetworksSelectMaterialNodes=1)
        ## Create an array of the materials
        materialSelection = cmds.ls(sl=1)
        ## Loop over the materials and graph them        
        for material in materialSelection:
            # cmds.select(material, r=1)
            try:
                cmds.hyperGraph(hsPanel, edit=True, addDependNode=material)
            except:
                mel.eval("hyperShadePanelGraphCommand(\"%s\", \"addSelected\")" % hsPanel)

    else:
        cmds.warning("Please select an object")

我對使用mel eval語句hyperShadePanelGraphCommand() ，但是我找不到python的替代品。 很高興有人糾正它！