Hi!

Is it possible to have digital asset with a float slider and change dynamically its range of values?

So when for example an attribute is 136, then range of parm “slider 1” is from 0 to 136?

thank you

You should be able to do it, however it is slightly more work that it should be. hou.ParmTemplate objects don't seem to have setMin/Max methods. If they did then you could simply grab the existing parm template, change the max value and reapply it. However, since it doesn't you'd basically have to just recreate the parameter each time. Something like this “should” work if you attach it to a parameter inside your asset that gets cooked when the geometry changes:

sopnode = hou.pwd()
val = get attribute value.
parm = sopnode.parm(“slider1”)
pt = parm.parmTemplate()
new_pt = hou.FloatParmTemplate(pt.name(), pt.label(), len(parm.tuple()), pt.defaultValue(), min=0, max=val, min_is_strict=True, max_is_strict=True)

sopnode.replaceSpareParmTuple(pt.name(), new_pt)

Hi!

thank you very much

It “almost” works ;]

So the code:
sopnode = hou.pwd()
val = get attribute value.
parm = sopnode.parm(“slider1”)
pt = parm.parmTemplate()
new_pt = hou.FloatParmTemplate(pt.name(), pt.label(), len(parm.tuple()), pt.defaultValue(), min=0, max=val, min_is_strict=True, max_is_strict=True)

works, but when I add the line:
sopnode.replaceSpareParmTuple(pt.name(), new_pt)

then this script stops working (when it is assigned to the float field I get no error, but when I'm trying to evaluate it with python shell I get:

>>> sopnode.replaceSpareParmTuple(pt.name(), new_pt)
Traceback (most recent call last):
File “<console>”, line 1, in <module>
File “/home/prisms/builder-new/Nightly10.0/dev/hfs/houdini/scripts/python/hou.py”,
line 4579, in replaceSpareParmTuple
return _hou.Node_replaceSpareParmTuple(*args)
OperationFailed: The attempted operation failed.
Parameter name is invalid or already exists
>>> pt.name()
'sculpt_historySl'

from the look at code, if you put it just like that:

this

val = get attribute value.

part have no value, you have to put there your code to calculate your destination number

and this
sopnode = hou.pwd()

hou.pwd() is used for accesing actual instance of operator that uses this code so if you put it into shell it fails because it doesn't return your node that you wan't modify. try it yourself, write hou.pwd() in shell an look what it returns, definetely it's not your operator you wan't change. In shell you should use instead hou.node(yourNodePath) to get acces to node you wan't modify.

Those are two things that are causing erroer for my eye.

Hi Swann_ !
Thank you for yours reply, and I'm sorry that I didn't write exactly evrrything.
So when I'm testing this code in python shell I'm using of course hou.node and val = 5.

The error is caused by the last part of code - sopnode.replaceParmTuple …

just tested this and it works, I don't know, do you have a file ?