Installing and Using Scipy in Houdini.

file Banner.png
Click here to get to the Guided Houdini Files.

 

Note: this works with Houdini 16.5. Other Houdini versions have not been confirmed by us yet, but it should work.

New Notes: For windows, this way of installing scipy does not function anymore with Houdini 17. Please follow this post: https://www.sidefx.com/forum/topic/58442/
To get older version of Houdini take a look at the daily builds page from SideFX.

Even Newer Notes: The newest version of Anaconda2 does not work even with version before Houdini 17.  For windows users we now recommend installing Houdini 16.5 from the official distribution and installing Anaconda2-2.4.0-Windows-x86_64.exe from the official distribution. Completing the instructions of this post with with the above mentioned files should make this work.

You may want to install the anaconda distribution to get the scipy python files. This distribution is available for windows, linux and mac. There are also other distributions available.

MICROSOFT WINDOWS INSTALLATION GUIDE:

Image result for warning sign

Window’s version of Houdini has its own’s version of python installed and does not use the default python location. Houdini uses python 2.7, NOT python 3.6. Make sure that you install the right scipy version. In anaconda for example, avoid the python 3.6 download.

NOT36.PNG
HANDS OF PYTHON 3.6!
YES27.PNG
Python 2.7 is your friend.

Then go into the anaconda directory that is usually:
C:\Users\USERNAME\Anaconda2

user anaconda2 before transfer.PNG
USER\anaconda2 directory before transfer.

and copy all the files from there into the Houdini python directory
C:\Houdini_Install_Directory\python27

python27 inside Houdini before scipy.PNG
python27 directory inside Houdini before scipy.
98.gif
Copy and paste all the anaconda files to \python27 on windows.

Scipy should now work fine.

 

Courtesy for the following Mac and Linux guides go to Chern et. al.

Mac Installation Guide

You don’t need to do anything. Mac already has SciPy.

Linux Installation Guide

Install SciPy from http://www.scipy.org/install.html. In particular it is recommended to install the Anaconda pack version 2.7. On Linux, Houdini ’s internal Python will read the Python library installed on your machine.


Using Scipy


A great reason to use scipy will be the scipy sparse methods that speed up the matrix processing. A python node with scipy will be able to import scipy commands as seen in the code below with sparse.

Print Friendly