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From: ThH
Subject: bezier.pov
Date: 4 Mar 2016 15:11:01
Message: <56d9a585@news.povray.org>
scenes/objects/bezier.pov

8< snip >8
bicubic_patch { type 1 flatness 0.1  u_steps 8  v_steps 8
8< snip >8

I don't see a bicubic_patch 8[

Any confirmations?

-- 
Thorsten aka ThH


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From: ThH
Subject: Re: bezier.pov
Date: 4 Mar 2016 15:41:14
Message: <56d9ac9a$1@news.povray.org>
Messed up. Second try ...

Am 04.03.2016 um 16:11 schrieb ThH:
> scenes/objects/bezier.pov
>
> 8< snip >8
> bicubic_patch { type 1 flatness 0.1  u_steps 8  v_steps 8
> 8< snip >8
>
> I don't see a bicubic_patch 8[
>
> Any confirmations?
>
> --
> Thorsten aka ThH

...any bicubic _patch...

Only the background is visible in the rendered image.


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From: William F Pokorny
Subject: Re: bezier.pov
Date: 4 Mar 2016 16:22:01
Message: <56d9b629$1@news.povray.org>
On 03/04/2016 10:42 AM, ThH wrote:
> Messed up. Second try ...
>
> Am 04.03.2016 um 16:11 schrieb ThH:
>> scenes/objects/bezier.pov
>>
>> 8< snip >8
>> bicubic_patch { type 1 flatness 0.1  u_steps 8  v_steps 8
>> 8< snip >8
>>
>> I don't see a bicubic_patch 8[
>>
>> Any confirmations?
>>
>> --
>> Thorsten aka ThH
>
> ...any bicubic _patch...
>
> Only the background is visible in the rendered image.

Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in 
3.7.0-stable.

Ubuntu 14.04.

Bill P.


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From: ThH
Subject: Re: bezier.pov
Date: 4 Mar 2016 16:40:46
Message: <56d9ba8e$1@news.povray.org>
Am 04.03.2016 um 17:22 schrieb William F Pokorny:

> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
> 3.7.0-stable.

Thanks for your confirmation Bill :))

> Ubuntu 14.04.

Debian "Jessie" here ;) Used Ubuntu for a long time before changing to 
Debian last december.


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From: clipka
Subject: Re: bezier.pov
Date: 4 Mar 2016 17:59:41
Message: <56d9cd0d$1@news.povray.org>
Am 04.03.2016 um 17:22 schrieb William F Pokorny:
> On 03/04/2016 10:42 AM, ThH wrote:
...
>> Am 04.03.2016 um 16:11 schrieb ThH:
>>> scenes/objects/bezier.pov
...
>>> I don't see a bicubic_patch 8[
>>>
>>> Any confirmations?
...
> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
> 3.7.0-stable.
> 
> Ubuntu 14.04.

Want to take a guess what I see with the Windows version?

.
.
.
.
.
.
(Spoiler alert!)
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

Hey, it's an issue reported by ThH. _Of course_ it works perfectly fine
on Windows >_<


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From: Le Forgeron
Subject: Re: bezier.pov
Date: 4 Mar 2016 18:01:09
Message: <56d9cd65$1@news.povray.org>
Le 04/03/2016 17:22, William F Pokorny a écrit :
> On 03/04/2016 10:42 AM, ThH wrote:
>> Messed up. Second try ...
>>
>> Am 04.03.2016 um 16:11 schrieb ThH:
>>> scenes/objects/bezier.pov
>>>
>>> 8< snip >8
>>> bicubic_patch { type 1 flatness 0.1  u_steps 8  v_steps 8
>>> 8< snip >8
>>>
>>> I don't see a bicubic_patch 8[
>>>
>>> Any confirmations?
>>>
>>> -- 
>>> Thorsten aka ThH
>>
>> ...any bicubic _patch...
>>
>> Only the background is visible in the rendered image.
> 
> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
3.7.0-stable.
> 

Testing 3.7.1-alpha.8503825.unofficial, the object is there, same as with stable
version.

(but with gcc and intel compiler, but not clang, my own master branch does have a
small problem of two squares on the patch that are gone, but that's another story)

Ubuntu 15.10

> Ubuntu 14.04.
> 
> Bill P.


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From: clipka
Subject: Re: bezier.pov
Date: 4 Mar 2016 18:22:32
Message: <56d9d268$1@news.povray.org>
Am 04.03.2016 um 19:01 schrieb Le_Forgeron:
> Le 04/03/2016 17:22, William F Pokorny a écrit :
...
>> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
3.7.0-stable.
> 
> Testing 3.7.1-alpha.8503825.unofficial, the object is there, same as with stable
version.

While I did my own testing with 3.7.1-alpha.8503825 as well, I'd be
quite surprised if any of the changes since alpha.8499454 had fixed it.
They appear to be as unrelated as I could possibly imagine.


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From: ThH
Subject: Re: bezier.pov
Date: 4 Mar 2016 18:24:30
Message: <56d9d2de$1@news.povray.org>
Am 04.03.2016 um 18:59 schrieb clipka:

> Hey, it's an issue reported by ThH. _Of course_ it works perfectly fine
> on Windows >_<

Haha :D

No reason for me to change the OS ;))

Just hoping it's your natural interest to get it fixed for Linux users :))


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From: William F Pokorny
Subject: Re: bezier.pov
Date: 4 Mar 2016 18:41:49
Message: <56d9d6ed$1@news.povray.org>
On 03/04/2016 01:22 PM, clipka wrote:
> Am 04.03.2016 um 19:01 schrieb Le_Forgeron:
>> Le 04/03/2016 17:22, William F Pokorny a écrit :
> ...
>>> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
3.7.0-stable.
>>
>> Testing 3.7.1-alpha.8503825.unofficial, the object is there, same as with stable
version.
>
> While I did my own testing with 3.7.1-alpha.8503825 as well, I'd be
> quite surprised if any of the changes since alpha.8499454 had fixed it.
> They appear to be as unrelated as I could possibly imagine.
>
Think you are correct. I just pulled and compiled 3.7.1-alpha.8503825 on 
seeing Jérôme at a newer version, but still nothing (no ray patch 
intersections are found). So maybe a 14.04 vs 15.1 difference ?

My compiler is g++ 4.8.

Bill P.


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From: Le Forgeron
Subject: Re: bezier.pov
Date: 4 Mar 2016 18:51:51
Message: <56d9d947@news.povray.org>
Le 04/03/2016 19:41, William F Pokorny a écrit :
> On 03/04/2016 01:22 PM, clipka wrote:
>> Am 04.03.2016 um 19:01 schrieb Le_Forgeron:
>>> Le 04/03/2016 17:22, William F Pokorny a écrit :
>> ...
>>>> Same here. The patch disappears in 3.7.1-alpha.8499454 while it works in
3.7.0-stable.
>>>
>>> Testing 3.7.1-alpha.8503825.unofficial, the object is there, same as with stable
version.
>>
>> While I did my own testing with 3.7.1-alpha.8503825 as well, I'd be
>> quite surprised if any of the changes since alpha.8499454 had fixed it.
>> They appear to be as unrelated as I could possibly imagine.
>>
> Think you are correct. I just pulled and compiled 3.7.1-alpha.8503825 on seeing
Jérôme at a newer version, but still nothing (no ray patch intersections are found).
So maybe a 14.04 vs 15.1 difference ?
> 
> My compiler is g++ 4.8.
> 


Nope, even with a produced "right" picture, valgrind reports a definitive problem of
uninitialised data.

Just ignore the syscall param write, the interesting parts seem to be in bezier.cpp


I presume even windows get the same problem if you have some auditing tools on it.

And using the same valgrind on the stable version: no such issue.


It's new, it's fresh, it's hidden and unreliable, due to the memory content.


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Attachments:
Download 'memcheck2.txt' (48 KB)

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