Introduction to Maya - Rendering in Arnold
This course will look at the fundamentals of rendering in Arnold. We'll go through the different light types available, cameras, shaders, Arnold's render settings and finally how to split an image into render passes (AOV's), before we then reassemble it i
# 1 18-06-2012 , 02:11 PM
Sircharles's Avatar
Registered User
Join Date: Dec 2010
Location: Uk
Posts: 193

Random number

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?

# 3 18-06-2012 , 03:48 PM
NextDesign's Avatar
Technical Director
Join Date: Feb 2004
Posts: 2,988
Simple:

windField.magnitude = rand(100, 200);


Imagination is more important than knowledge.
# 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.

# 5 18-06-2012 , 04:58 PM
Sircharles's Avatar
Registered User
Join Date: Dec 2010
Location: Uk
Posts: 193
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?

# 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.

# 7 18-06-2012 , 07:49 PM
Sircharles's Avatar
Registered User
Join Date: Dec 2010
Location: Uk
Posts: 193
Yup I suppose. thanks.

# 8 18-06-2012 , 08:22 PM
PixalZA's Avatar
Lifetime Member
Join Date: May 2011
Location: Riyadh, Saudi Arabia
Posts: 525


Earth: The crazy asylum of the universe.
# 9 19-06-2012 , 01:04 PM
Sircharles's Avatar
Registered User
Join Date: Dec 2010
Location: Uk
Posts: 193
Interesting, thanks.

# 10 19-06-2012 , 03:22 PM
NextDesign's Avatar
Technical Director
Join Date: Feb 2004
Posts: 2,988
Just in case you're using nCloth, it has wind built in.


Imagination is more important than knowledge.
Posting Rules Forum Rules
You may not post new threads | You may not post replies | You may not post attachments | You may not edit your posts | BB code is On | Smilies are On | [IMG] code is On | HTML code is Off

Similar Threads