how to reset multiple simulations with 1 button?

Forums Technical Discussion how to reset multiple simulations with 1 button?

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LH21: Member; 13 posts; Joined: March 2020; Offline

March 2, 2021 8:37 p.m.

I am trying to create a HDA with a few pop and dop simulations that will need to be reset after the user change the seed, and wonder what is the way to link all the reset simulation buttons to 1 master button on the HDA interface?

Edited by LH21 - March 2, 2021 20:38:56


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 4, 2021 1:54 p.m.

You could add a callback script to the seed parameter so that when it's changed it does a pressButton() on all the dopnet's reset simulation buttons. Depending how heavy the inputs to these sims, that might not be a good idea though if it takes time to calculate the source like high res grains or something.


LH21: Member; 13 posts; Joined: March 2020; Offline

March 4, 2021 4:28 p.m.

I understand the concept, but I have no experiences with python, would you be able to show me how that script would look like?


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 4, 2021 5:06 p.m.

In the Scripts tab of the HDA, make a new Python Module event handler from the drop down list on the lower left, then make a function that's something like this:

def resetSimulations():
    parent = hou.pwd() # This gets the current HDA node
    
    # Specify the DOP network names in a list
    # If you have nested DOP networks, specify the relative
    # path to the HDA like "subnet1/popnet1"
    networks = [ "popnet1", "dopnet1" ]
    
    # Loop over DOP networks
    for net in networks :
        node = hou.node( parent.path() + "/" + net ) # Get current DOP network node
        button = node.parm("resimulate") # Get the Reset Simulation button
        button.pressButton()

Then on your parameter's Callback Script put this in there and make sure it's set to Python:

hou.phm()resetSimulations()

Edited by krueger - March 4, 2021 17:06:57


LH21: Member; 13 posts; Joined: March 2020; Offline

March 4, 2021 9:13 p.m.

Thanks for the help, and the explanations, but I got this error whenever I click the master button on the interface

SyntaxError: ('invalid syntax', ('Object/bombexpl_fx/resetsim', 1, 25, 'hou.phm()resetSimulations()\n'))

the name of my master button is resetsim


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 4, 2021 9:52 p.m.

louiehoi
Thanks for the help, and the explanations, but I got this error whenever I click the master button on the interface

SyntaxError: ('invalid syntax', ('Object/bombexpl_fx/resetsim', 1, 25, 'hou.phm()resetSimulations()\n'))

the name of my master button is resetsim

My bad, there should be a period in there after phm()

hou.phm().resetSimulations()


LH21: Member; 13 posts; Joined: March 2020; Offline

March 4, 2021 10:44 p.m.

more error message returning

Traceback (most recent call last):
  File "Object/bombexpl_fx/resetsim", line 1, in <module>
  File "Object/bombexpl_fx, PythonModule", line 12, in resetSimulations
AttributeError: 'NoneType' object has no attribute 'parm'

this looks very similar to the one I tried earlier from this post

https://www.sidefx.com/forum/topic/56734/?page=1#post-254147 [www.sidefx.com]

also returns the no attribute 'parm'


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 5, 2021 3:26 a.m.

It's not pointing to your dopnet correctly. Can you post your python script and also the paths to your dopnets?


LH21: Member; 13 posts; Joined: March 2020; Offline

March 5, 2021 12:02 p.m.

def resetSimulations():
    parent = hou.pwd()
    
    networks = [ "obj/bombexpl/bombexpl/popnet10", "obj/bombexpl/bombexpl/popnet112" ]
    
    for net in networks :
        node = hou.node( parent.path() + "/" + net )
        button = node.parm("resimulate")
        button.pressButton()


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 5, 2021 12:48 p.m.

The entries in your networks list should be relative to your HDA and not absolute paths because your HDA path will most likely change. That's why you get the parent path and then add the relative dopnet path to it.

This is currently going to evaluate as something like this:
/obj/whatever_your_HDA_is/obj/bombexpl/bombexpl/popnet10

So trim off the HDA path in your network list entries so it's either "bombexpl/popnet10" or just "popnet10" (I can't tell if you've got it nested inside a node called "bombexpl" inside your HDA)


LH21: Member; 13 posts; Joined: March 2020; Offline

March 5, 2021 4:32 p.m.

oh yes it worked, thanks for help!


krueger: Member; 191 posts; Joined: Oct. 2018; Offline

March 5, 2021 4:34 p.m.

No problem


tamte: Member; 8554 posts; Joined: July 2007; Online

March 5, 2021 7:48 p.m.

You can also RMB/Copy Parameter on your hda button
and RMB/Paste relative references on all the Reset Simulation buttons on your dopnets

Then clicking button in hda would trigger all buttons that reference it

Tomas Slancik
FX Supervisor
Method Studios, NY


LH21: Member; 13 posts; Joined: March 2020; Offline

March 5, 2021 8 p.m.

tamte
You can also RMB/Copy Parameter on your hda button
and RMB/Paste relative references on all the Reset Simulation buttons on your dopnets

Then clicking button in hda would trigger all buttons that reference it

Tried this at the start, but the reset simulation button on the dopnet never turned green and get linked together.


tamte: Member; 8554 posts; Joined: July 2007; Online

March 5, 2021 8:34 p.m.

louiehoi
Tried this at the start, but the reset simulation button on the dopnet never turned green and get linked together.

I'm pretty sure it used to work, if not you can also
- open Type Properties for your HDA
- in Parameters tab select your button
- go to Channels Tab
- and drag all your buttons into the Add Links area for dropping
- press Apply or Accept
- all those buttons will link to your HDA button, and while they will not turn green their text should be bold and if you RMB/Expression/Edit Expression on any of them you should see the reference

Edited by tamte - March 5, 2021 20:35:09

Tomas Slancik
FX Supervisor
Method Studios, NY


LH21: Member; 13 posts; Joined: March 2020; Offline

March 5, 2021 9:01 p.m.

tamte
louiehoi
Tried this at the start, but the reset simulation button on the dopnet never turned green and get linked together.
I'm pretty sure it used to work, if not you can also
- open Type Properties for your HDA
- in Parameters tab select your button
- go to Channels Tab
- and drag all your buttons into the Add Links area for dropping
- press Apply or Accept
- all those buttons will link to your HDA button, and while they will not turn green their text should be bold and if you RMB/Expression/Edit Expression on any of them you should see the reference

Thanks for this, definitely a faster and easier way to do it!


darkkonee6: Member; 1 posts; Joined: Nov. 2021; Offline

April 1, 2023 6:43 a.m.

tamte
louiehoi
Tried this at the start, but the reset simulation button on the dopnet never turned green and get linked together.
I'm pretty sure it used to work, if not you can also
- open Type Properties for your HDA
- in Parameters tab select your button
- go to Channels Tab
- and drag all your buttons into the Add Links area for dropping
- press Apply or Accept
- all those buttons will link to your HDA button, and while they will not turn green their text should be bold and if you RMB/Expression/Edit Expression on any of them you should see the reference

Hi! Does this still work? Because i can't do it.


jershi: Member; 1 posts; Joined: Nov. 2017; Offline

March 28, 2024 6:18 p.m.

darkkonee6
tamte
louiehoi
Tried this at the start, but the reset simulation button on the dopnet never turned green and get linked together.
I'm pretty sure it used to work, if not you can also
- open Type Properties for your HDA
- in Parameters tab select your button
- go to Channels Tab
- and drag all your buttons into the Add Links area for dropping
- press Apply or Accept
- all those buttons will link to your HDA button, and while they will not turn green their text should be bold and if you RMB/Expression/Edit Expression on any of them you should see the reference

Hi! Does this still work? Because i can't do it.

Hello, I just found this thread helpful. I was not able to drag and drop anymore - not sure if that's my fault though. However if you type in (or copy text and paste) the link of the destination channel into the Linked Channels field, it still works as expected. Text was bolded on my buttons, and I can see the reference at RMB > Exression > Edit Expression. Perhaps I dragged wrong, but for anyone trying, this was my simple solution - type it.

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