Get Node path from a string parm in another Node

[wandersonp]

For example I have a geo1 node and the string in shop_materialpath parm is ../../myShader

 

how can I put this node myShader in a variable with absolute path?

 

my fragment of code is this

import hou 

def printUsedMaterials():
    materials = []
    for child in hou.node('/').allSubChildren():
        for parm in child.parms():
            #search in obj node
            if parm.name() == "shop_materialpath" and parm.eval() != "":
                materials.append(parm.eval().split("/")[-1])
            #search in material node
            if parm.name() == "shop_materialpath1" and parm.eval() != "":
                materials.append(parm.eval().split("/")[-1])

    print materials

printUsedMaterials()

[Guest mantragora]

# get node
node = hou.Node()
 
# get relative path
parm = node.parm().eval()
 
# get full path
full path = node.node(parm).path()

[wandersonp]

awesome thanks mantragora

the final code with corrections

import hou 

def printUsedMaterials():
    materials = []
    for child in hou.node('/').allSubChildren():
        for parm in child.parms():
            #search in obj node
            if parm.name() == "shop_materialpath" or parm.name() == "shop_materialpath1":
                path = parm.eval()
                if path != "":
                    full_path = child.node(path).path()
                    materials.append(full_path)

    print materials

printUsedMaterials()

[wandersonp]

I did few modifications in this script, to track which material node is used in scene, the unused materials dont change the colors, them I can track and organize and clean my shops better

import hou 

def getUsedMaterialsPath():
    materials = []
    for child in hou.node('/').allSubChildren():
        for parm in child.parms():
            #search in obj node
            if parm.name() == "shop_materialpath":
                path = parm.eval()
                if path != "":
                    full_path = child.node(path).path()
                    materials.append(full_path)

    return materials

def changeColorFromUsedMaterials(color):
    materials = getUsedMaterialsPath()

    for material in materials:
        materialNode = hou.node(material)
        materialNode.setColor(color)

changeColorFromUsedMaterials(hou.Color((1, 0, 0)))

Edit: I edited this code coz i need to figure out how to do same thing with the material and shader sops nodes

Edited February 13, 2015 by wandersonp