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Cousin Ricky <ric### [at] yahoo com> wrote:
> The question I have is how to best simulate interface between the glass
> and a liquid without incurring either a coincident surface or spurious
> IOR changes due to non-coincident surfaces.
The way it used to be done was to overlap the surfaces to prevent an air gap
from being in there.
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From: Alain
Subject: Re: No sphere yet, while other are preparing 3.71
Date: 4 Apr 2017 20:41:30
Message: <58e43d3a@news.povray.org>
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> Cousin Ricky <ric### [at] yahoocom> wrote:
>
>> The question I have is how to best simulate interface between the glass
>> and a liquid without incurring either a coincident surface or spurious
>> IOR changes due to non-coincident surfaces.
> The way it used to be done was to overlap the surfaces to prevent an air gap
> from being in there.
>
>
The best way is to clip the glass, have an open to the top object for
the glass-liquid part with the differential ior for the interface and a
third object for the top surface, all enclosed into an union.
The glass part have the glass' ior. Maybe 1.5 to 1.8
The top surface have the ior of the liquid, around 1.33.
The inner surface ior would be ior (ior_glass/ior_liquid) -> 1.1278 to
1.353.
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From: Le Forgeron
Subject: Re: No sphere yet, while other are preparing 3.71
Date: 5 Apr 2017 07:05:03
Message: <58e4cf5f$1@news.povray.org>
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Le 05/04/2017 à 02:41, Alain a écrit :
> Le 17-04-04 à 19:38, omniverse a écrit :
>> Cousin Ricky <ric### [at] yahoocom> wrote:
>>
>>> The question I have is how to best simulate interface between the glass
>>> and a liquid without incurring either a coincident surface or spurious
>>> IOR changes due to non-coincident surfaces.
>> The way it used to be done was to overlap the surfaces to prevent an
>> air gap
>> from being in there.
>>
>>
>
> The best way is to clip the glass, have an open to the top object for
> the glass-liquid part with the differential ior for the interface and a
> third object for the top surface, all enclosed into an union.
> The glass part have the glass' ior. Maybe 1.5 to 1.8
> The top surface have the ior of the liquid, around 1.33.
> The inner surface ior would be ior (ior_glass/ior_liquid) -> 1.1278 to
> 1.353.
Or you could just go that way:
http://wiki.povray.org/content/User:Le_Forgeron/HowTo/Perfect_glass
No overlapping, and just CSG in the right order.
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Am 05.04.2017 um 13:05 schrieb Le_Forgeron:
> http://wiki.povray.org/content/User:Le_Forgeron/HowTo/Perfect_glass
>
> No overlapping, and just CSG in the right order.
You deserve a cigar!
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