POV-Ray : Newsgroups : povray.newusers : Transparent Round_Box has many artifacts Server Time
23 Jun 2024 14:40:05 EDT (-0400)
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From: Cousin Ricky
Subject: Re: Transparent Round_Box has many artifacts
Date: 23 Feb 2024 16:53:29
Message: <65d913d9$1@news.povray.org>
On 2024-02-23 17:41 (-4), Cousin Ricky wrote:
> 
> I don't normally give advice that asked (I prefer to let new users deal
> with problems one at a time), but Alain is correct about assumed_gamma 1.

*wasn't asked.


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From: Bald Eagle
Subject: Re: Transparent Round_Box has many artifacts
Date: 23 Feb 2024 19:05:00
Message: <web.65d9318711ba5a471f9dae3025979125@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:
>  This is a whole bed of weeds that you
> need to understand before taking advice blindly.

YESSSS!!!!

Can we rehash gamma and srgb conversion again?   *PLEASE*?

That's totally one of my favorite topics!


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From: Kenneth
Subject: Re: Transparent Round_Box has many artifacts
Date: 24 Feb 2024 09:05:00
Message: <web.65d9f75911ba5a479b4924336e066e29@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
>
> Can we rehash gamma and srgb conversion again?   *PLEASE*?
>
> That's totally one of my favorite topics!

Personally, I would rather dance on a bed of hot coals instead; it would
probably be less painful, and far less confusing...

;-)


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From: ceving
Subject: Re: Transparent Round_Box has many artifacts
Date: 24 Feb 2024 14:40:00
Message: <web.65da453411ba5a4777ee2d97da2676d5@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:
> I have created a set of macros that avoids redundant spheres and cylinders:
>
>   https://github.com/CousinRicky/POV-RoundEdge/releases
>
> Macros RE_Box() and RE_Cylinder will both work for this object, using
> UseMerge = true.

Thanks! RE_Cylinder works fine.

https://ceving.github.io/breakout/Player.png

There are some minor artifacts on both ends, but maybe they are normal, I don't
know.

> I don't normally give advice that asked (I prefer to let new users deal
> with problems one at a time), but Alain is correct about assumed_gamma 1.

I used the gamma value just as a brightness slider. The images were too dark
with 1.


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From: Bald Eagle
Subject: Re: Transparent Round_Box has many artifacts
Date: 24 Feb 2024 17:30:00
Message: <web.65da6cc111ba5a471f9dae3025979125@news.povray.org>
"ceving" <nomail@nomail> wrote:

> I used the gamma value just as a brightness slider. The images were too dark
> with 1.

Well yeah, you had a black background.
use
sky_sphere {pigment {rgb 1}}
and see the dramatic difference.


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From: kurtz le pirate
Subject: Re: Transparent Round_Box has many artifacts
Date: 25 Feb 2024 12:35:13
Message: <65db7a51$1@news.povray.org>
On 24/02/2024 20:36, ceving wrote:
> Thanks! RE_Cylinder works fine.
> 
> https://ceving.github.io/breakout/Player.png
> 
> There are some minor artifacts on both ends, but maybe they are normal, I don't
> know.


Do you really have to use a macro for such a simple object ?


Back to basics csg : a simple merge { sphere{} sphere{} cylinder{} } is
more than enough, but maybe I've missed something?





-- 
Kurtz le pirate
Compagnie de la Banquise


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From: Alain Martel
Subject: Re: Transparent Round_Box has many artifacts
Date: 25 Feb 2024 13:33:29
Message: <65db87f9$1@news.povray.org>
Le 2024-02-25 à 12:35, kurtz le pirate a écrit :
> On 24/02/2024 20:36, ceving wrote:
>> Thanks! RE_Cylinder works fine.
>>
>> https://ceving.github.io/breakout/Player.png
>>
>> There are some minor artifacts on both ends, but maybe they are normal, I don't
>> know.
> 
> 
> Do you really have to use a macro for such a simple object ?
No, but the macro do exist.
> 
> 
> Back to basics csg : a simple merge { sphere{} sphere{} cylinder{} } is
> more than enough, but maybe I've missed something?
> 

You didn't miss anything.


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From: Bald Eagle
Subject: Re: Transparent Round_Box has many artifacts
Date: 25 Feb 2024 15:20:00
Message: <web.65dba0c211ba5a471f9dae3025979125@news.povray.org>
kurtz le pirate <kur### [at] gmailcom> wrote:

> Do you really have to use a macro for such a simple object ?

> Back to basics csg : a simple merge { sphere{} sphere{} cylinder{} } is
> more than enough, but maybe I've missed something?


Depends on how many you want to make, or how many adjustments you want to do, or
if you're going to use it in an animation, where it needs to be parameterized.

A macro taking Start, End, and Radius as arguments would save a lot of work.

- BW


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From: ceving
Subject: Re: Transparent Round_Box has many artifacts
Date: 26 Feb 2024 03:20:00
Message: <web.65dc48dc11ba5a479901d2cada2676d5@news.povray.org>
kurtz le pirate <kur### [at] gmailcom> wrote:
> Do you really have to use a macro for such a simple object ?
>
> Back to basics csg : a simple merge { sphere{} sphere{} cylinder{} } is
> more than enough, but maybe I've missed something?

I have no idea. I am a "newuser". I started with the boxes first

https://ceving.github.io/breakout/

and did the player later on. But your suggestion sounds right. I will try it.

There is also another optimization I need to add. Right now I create the
different colors with a Makefile and sed:

https://github.com/ceving/breakout/blob/main/Makefile

But I think Povray's DSL should be sufficient to do the iteration. I still need
to find out how.


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From: kurtz le pirate
Subject: Re: Transparent Round_Box has many artifacts
Date: 26 Feb 2024 05:43:39
Message: <65dc6b5b$1@news.povray.org>
On 26/02/2024 09:16, ceving wrote:
> kurtz le pirate <kur### [at] gmailcom> wrote:
>> Do you really have to use a macro for such a simple object ?
>>
>> Back to basics csg : a simple merge { sphere{} sphere{} cylinder{} } is
>> more than enough, but maybe I've missed something?
> 
> I have no idea. I am a "newuser". I started with the boxes first

Welcome


> and did the player later on. But your suggestion sounds right. I will try it.
> 
> There is also another optimization I need to add. Right now I create the
> different colors with a Makefile and sed:
> 
> https://github.com/ceving/breakout/blob/main/Makefile

Makefile ans sed  are powerful tools on Linux...



> But I think Povray's DSL should be sufficient to do the iteration. I still need
> to find out how.
... but POVRay makes it easy

How ? have a look at the animations and the demo scenes in portfolio
folder like allpatterns.pov, t_textures_.pov, ...







-- 
Kurtz le pirate
Compagnie de la Banquise


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