Reading parameters and changing their value | Python for Houdini

Houdini is all about tweaking parameters and attributes. This video will show you how to access a parameter with the «parm()» method, read its value with «eval()» and even modify it with «set()».

You will also learn the difference between a single-component and a multi-component parameter, and how to modify all axes at the same time with the «parmTuple()» method.

Finally, we talk about Menus and Toggles and how to manage them in Python.

🟠 Houdini 19 / Python 3

00:00 Intro
00:59 Accessing a parameter
03:37 Reading a parameter value
05:10 Editing a parameter value
06:07 Multi-component parameters
09:25 Menus
11:34 Toggles

[marcomelantonio]

This is how every tutorial should be! You made it simple to follow and at the same time super helpful and complete! Thanks for sharing 👏👏👏

[maarten]

The perfect tutorial! Thank you very much!

[DayvidEti]

i love your teaching, im so new to coding in houdini and this video was more than helpful

[CestUnSigne]

Hello, and how can you do for string parms containing groups ? for instance I am creating a vellumsolver vith python but for the pin group I am writing that :
group_capuchon group_dos group_bas group_queue')
And it doesn't work once it's on string, do you have a solution?
Thanks!

[GaelLendoiro]

Very good information, thanks. But if I want to modify or set the intensity parameter of a light made in solaris (/stage/light1) I get an error. Something about the name of the parameter containing ":" because the name of the intensity parameter is "inputs:intensity". How could I resolve this?

[taylansoydan]

hey, i also want to set colors to my nodes, how can I do this?

[varunthapliyal]

Whats the use ? isn't it more tedius than normally changing from parameters tab

[alejandrogarcia]

Juanjo estás trabajando muchísimo y lo sabes 😟😟😟😟😟 demasiado diría yo 😞, dos semanas llevas sin publicar ningún tutorial Juanjo dos semanas 😞😞😞😞😞

[jaumearevalo]

I didn't heard about this way of reading attributes before! ( 'parameterVariable.eval()' ). I always used evalParm('parameter').
Good tutorial! I love how do you teach :)