Jump to content

Wind Loop Period not as shown

Recommended Posts

Hi All,


Has anyone else encountered a problem where the identified period of a loop is not the actual looping point? I have been scratching my head over this for a few days and gotten to the point where I think the stiffness value is having something done to it before it is fed into the equation. I have already worked back to the equation that generates the displayed period (which I then found in a forum post)..


Leaving other variables at 1 for simplicity, I'm finding that changing the stiffness value results in loops as below:


Stiffness         Period        Actual Period

0.5                  5                ~15 (give or take a few ticks)

1                     10              30

2                     20              ~32

3                     30              ~39

4                     40              50

5                     50              ~58

6                     60              ~68


And so on. I've found there is a decreasing value which approaches 1 as the stiffness value increases. But that's about where my ability to pull this apart ends. The difference factor I have found does plot a pretty neat curve [3, 1.6666, 1.3333, 1.25, 1.17, 1.141667], but I can't quite bring it into something I can use to predict the actual period.


If there's any suggestions out there, I'm all ears. (incidentally, GrowFX version: 1.9.9 sp2)


Kind Regards,


Link to comment
Share on other sites

Hi DSimmonds,


Yes, you're right, there is some inaccuracy. This is due to the fact that you've the System unit scale = 1 meter, and if you make your scene with System unit scale = 1 cm or 1 inches, then the problem will be solved.
Please see my example: WindLoop_GrowFX_TestScene_2.max
Of course, we'll try to solve this issue programmatically.
Thanks for your bug report!
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...