set absolute reference? python

[danielsweeney]

Hi Everyone,

 

can anyone give me a heads up on how to do this?

 

if I want to set a relative reference I usually do something like this.

 

node = hou.node('/obj/geo1/')
p1 = node.parm('sphere1/scale')
p2 = node.parm('sphere2/scale')

p2.set(p1)

 

but what if I want the path to be an absolute reference?

 

cheers for your help.

 

D

[jfaulkner]

You could build an expression pointing to the parm instead, something like this

node_one = hou.node("/obj/geo1/sphere1")
node_two = hou.node("/obj/geo1/sphere2")

node_two.parm("scale").setExpression('chs("' + node_one.path() + '/scale")')

[danielsweeney]

ah ok. so just do it manually.

 

just didn't know if there was a more elegant solution. and you can set absolute reference with right-click. thought there might be a function for it. 

 

cheers for the help.

 

D

[Benyee]

import string
def abs_path_reference(node):
    parms = node.parms()
    
    #filter string type parameters
    refParms = []
    for i in parms:
        if i.rawValue().find('ch("../')!=-1:
            refParms.append(i)            
    print str( len(refParms) ) + " parameters channel referenced and modified to:"
    
    #loop for finding out node(s) which channels reference from
    for parm in refParms:
        orig_expr=parm.rawValue()
        absPathStrs=[]
        relPathStrs=[]
        for i in parm.rawValue().split('('):
            for j in i.split(')'):
                if j.find('../')!=-1:                    
                    tmp1=j.split('/')
                    tmp1.pop()
                    tmp2='/'.join(tmp1)
                    relNodePath=tmp2[1:len(tmp2)]
                    refNode=node.node(relNodePath)
                    absNodePath=refNode.path()
                    absPathStrs.append(absNodePath)
                    relPathStrs.append(relNodePath)
                                                
        #setting new expressions
        new_expr=orig_expr
        for index in range(len(relPathStrs)):
            count=new_expr.count(relPathStrs[index])            
            new_expr=new_expr.replace(relPathStrs[index],absPathStrs[index],count)
        print new_expr
        parm.setExpression(new_expr)

    print "-------------------------------------------"
            
                                    
#excute script
sels = hou.selectedNodes()
for sel in sels:
    abs_path_reference(sel)

 

hello daniel,this is some code for modifying from relative to absolute path in channel reference,i don't know whether it's a complete solution,but it could be useful in some situation,hope helpful

Edited August 26, 2021 by Benyee