[Sidefx-houdini-list] Point Sop

gravatar at gravatonia.com gravatar at gravatonia.com
Tue Oct 23 22:21:54 EDT 2007


Caleb,
    That makes sense...  In fact I should have known that.  Still I can
think of some different uses for that.  Thanks for the refresher.  

Grav

Original Message:
-----------------
From: caleb at howlor.com caleb at howlor.com
Date: Tue, 23 Oct 2007 20:01:36 -0400
To: sidefx-houdini-list at sidefx.com, sidefx-houdini-list at sidefx.com
Subject: Re: [Sidefx-houdini-list] Point Sop


Oh, and part B):

The normal is an unnormalized vector.  That is, it can have any magnitude. 
It is a translational vector, not a rotational one, and so it is
interpreted as units, rather than any rotational metric such as radians.

-caleb



Original Message:
-----------------
From: gravatar at gravatonia.com gravatar at gravatonia.com
Date: Tue, 23 Oct 2007 19:41:54 -0400
To: sidefx-houdini-list at sidefx.com
Subject: [Sidefx-houdini-list] Point Sop


Alrighty, two questions.  First, does the force parameter actually do
anything. I was under the impression way back in the day that it would slow
down particle speed outside of the actual simulation.  I have tried
expressions like $VX*2 and such and the appearance of the particle
placement seems to change, but once rendered the speed does not seem any
different when render out a sequence of frames.  I have other ways to do
the same thing, but I would like to know what it really is doing.  Second
question, is the normal parameter in the point sop in radians...  -1 to 1? 
If so, does houdini convert values over 1 to the equivalent location. 
Wasn't much in the documentation on that.

Grav

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