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13 Nov 2024 03:49:38 EST (-0500)
  Airbubbles in icicle test (Message 1 to 5 of 5)  
From: [GDS|Entropy]
Subject: Airbubbles in icicle test
Date: 26 Dec 2010 13:23:13
Message: <op.vob2owkz0819q0@gdsentropy.nc.rr.com>
Single icicle with air bubbles, rendered in 4.5min.
I do not know what to think about this prototype yet.
I am happy with the irregular shapes formed by the bubbles, but not  
completely satisfied with the distribution.

Real icicles are formed in layers, which I could do by (I think) a method  
similar to the way I test if the air bubbles are "inside" the icicle  
object.
Right now I construct a sphere based approximation of the icicle and test  
against that to determine if the air bubbles are "inside" the real icicle  
object. I suppose if I executed a recursive orbiting trace() of that  
object, placing air bubbles as well as perhaps *slightly* varying the IOR  
of each layer, I might be able to emulate something like what you see at  
the following link:  
http://www.physics.utoronto.ca/~smorris/edl/icicleripples/icicleripples.html

Any thoughts?

Branching as seen in the following link is next:  
http://farm4.static.flickr.com/3475/3238212338_9245029bf5.jpg?v=0

-- 
Ian McDonald
Lean Agile .NET 4.0/MVC
Senior Application Architect,
Developer and Security Analyst


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From: Dave Blandston
Subject: Re: Airbubbles in icicle test
Date: 26 Dec 2010 19:15:01
Message: <web.4d17d966105f230966554e20@news.povray.org>
"[GDS|Entropy]" <gdsHYentropyAThotmailDTcom> wrote:
> Single icicle with air bubbles, rendered in 4.5min.
> I do not know what to think about this prototype yet.
> I am happy with the irregular shapes formed by the bubbles, but not
> completely satisfied with the distribution.

I agree the distribution is not right, but the bubbles do add a great deal of
interest to the icicle. You are certainly on the right track.

Regards,
Dave Blandston


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From: [GDS|Entropy]
Subject: Re: Airbubbles in icicle test
Date: 26 Dec 2010 19:31:18
Message: <op.vocjqfd60819q0@gdsentropy.nc.rr.com>
I hit the 1 million blob component limit using the air bubbles...so  
unfortunately I will not be including that in my first alpha release. :(
On the other hand, they are useless to even have unless you are looking  
fairly closely at an icicle...so for general use this will not be an  
issue. I will re include that functionality in alpha 2.

Alpha 1 will be released as soon as I clean up the code and polish a few  
things, probably hours away now.

On Sun, 26 Dec 2010 19:10:14 -0500, Dave Blandston <nomail@nomail> wrote:

> "[GDS|Entropy]" <gdsHYentropyAThotmailDTcom> wrote:
>> Single icicle with air bubbles, rendered in 4.5min.
>> I do not know what to think about this prototype yet.
>> I am happy with the irregular shapes formed by the bubbles, but not
>> completely satisfied with the distribution.
>
> I agree the distribution is not right, but the bubbles do add a great  
> deal of
> interest to the icicle. You are certainly on the right track.
>
> Regards,
> Dave Blandston
>
>


-- 
Ian McDonald
Lean Agile .NET 4.0/MVC
Senior Application Architect,
Developer and Security Analyst


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From: Alain
Subject: Re: Airbubbles in icicle test
Date: 27 Dec 2010 18:48:29
Message: <4d1925cd$1@news.povray.org>

> I hit the 1 million blob component limit using the air bubbles...so
> unfortunately I will not be including that in my first alpha release. :(
> On the other hand, they are useless to even have unless you are looking
> fairly closely at an icicle...so for general use this will not be an
> issue. I will re include that functionality in alpha 2.
>
> Alpha 1 will be released as soon as I clean up the code and polish a few
> things, probably hours away now.
>
>

It may be a viable, if not totaly satisfying, compromise to difference 
the air bubbles using a second blob, used uniquely for that purpose.
One blob for the icicle and a second, or 2 or 3 in extreme cases, for 
the bubbles.

Normaly, those don't realy contribute to the overall shape.


Alain


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From: [GDS|Entropy]
Subject: Re: Airbubbles in icicle test
Date: 27 Dec 2010 20:40:36
Message: <op.voehlvkp0819q0@gdsentropy.nc.rr.com>
On Mon, 27 Dec 2010 18:48:26 -0500, Alain <aze### [at] qwertyorg> wrote:


>> I hit the 1 million blob component limit using the air bubbles...so
>> unfortunately I will not be including that in my first alpha release.
 :(
>> On the other hand, they are useless to even have unless you are looki
ng
>> fairly closely at an icicle...so for general use this will not be an
>> issue. I will re include that functionality in alpha 2.
>>
>> Alpha 1 will be released as soon as I clean up the code and polish a 
few
>> things, probably hours away now.
>>
>>
>
> It may be a viable, if not totaly satisfying, compromise to difference
  

> the air bubbles using a second blob, used uniquely for that purpose.
> One blob for the icicle and a second, or 2 or 3 in extreme cases, for 
 

> the bubbles.
>
> Normaly, those don't realy contribute to the overall shape.
>
>
> Alain

I postponed the alpha release for a bit to integrate duplicate avoidance
,  

nearly done with that now, so maybe that will help that as well as impro
ve  

general performance.

I suppose a separate blob would be an option, thank you. :) I will explo
re  

this issue more once I get the alpha out.

-- 

Ian McDonald
Lean Agile .NET 4.0/MVC
Senior Application Architect,
Developer and Security Analyst


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