Random number

Complex UV Layout in Maya

Over the last couple of years UV layout in Maya has changed for the better. In this course we're going to be taking a look at some of those changes as we UV map an entire character

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# 1 18-06-2012 , 02:11 PM

Registered User
Join Date: Dec 2010

Location: Uk

Posts: 193

Hi Id like to be able to create an expression to generate a number between 100 - 200

and use it in the magnitude slot of my wind field?

But I've never really done expressions..

Anyone know how?

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# 2 18-06-2012 , 03:46 PM

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https://download.autodesk.com/us/maya...ands/rand.html

-stwert

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# 3 18-06-2012 , 03:48 PM

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Join Date: Feb 2004

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Simple:

windField.magnitude = rand(100, 200);

Imagination is more important than knowledge.

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# 4 18-06-2012 , 03:50 PM

EduSciVis-er
Join Date: Dec 2005

Location: Toronto

Posts: 3,374

Just to be clear though, as far as I know, this will cause the magnitude of the wind to be a random strength on each and every frame of your animation, which might give strange results.

-stwert

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# 5 18-06-2012 , 04:58 PM

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Join Date: Dec 2010

Location: Uk

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sweet, would there be a way to control the amount of times it changes.

For example 4 times or 10 times over a period of 10secs for instance?

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# 6 18-06-2012 , 05:03 PM

EduSciVis-er
Join Date: Dec 2005

Location: Toronto

Posts: 3,374

Does it have to be different every time? Honestly I would just pick a few "random" values and key the magnitude over time. Then you'll get smooth transitions and it will still appear random.

-stwert

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-->How to Effectively Ask Questions on Forums<--

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# 7 18-06-2012 , 07:49 PM

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Location: Uk

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Yup I suppose. thanks.

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# 8 18-06-2012 , 08:22 PM

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Join Date: May 2011

Location: Riyadh, Saudi Arabia

Posts: 525

I found documentation and data on a wind speed and wind direction study done over a period of one month at one second intervals. The raw wind data is available for download. It gives one a good idea how frequently the speed and direction of wind actually changes.

https://www.google.org/pdfs/google_he...collection.pdf

The pdf gives the layout of the raw text file data. The raw text files can be found at:

https://code.google.com/p/google-rec-csp/downloads/list

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