POV-Ray : Newsgroups : povray.binaries.images : Not for sale anymore (120 kbu) Server Time
14 Apr 2026 02:28:48 EDT (-0400)
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From: Gilles Tran
Subject: Re: Not for sale anymore (120 kbu)
Date: 16 May 2002 07:58:01
Message: <3ce39ec9$1@news.povray.org>

3ce31078@news.povray.org...
> that don't seem to be atached to anything,
> though I'm sure in the full sized image they are just attached to very
small
> twigs.

No you're right. There are some tiny twigs but looking closer I can see now
that some leaves actually float in the air. Weird. I'll have to check the
model.

G.


--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters

>


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From: Glen Berry
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 11:06:27
Message: <XcXjPBsriyKH8vQxmIfuefbvVqsc@4ax.com>


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From: Gilles Tran
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 11:36:26
Message: <3ce3d1fa@news.povray.org>

XcXjPBsriyKH8vQxmIfuefbvVqsc@4ax.com...
> You have made me curious about something. I would like to know what
> camera angle Gilles used in this scene? I think the angle of view is
> perhaps more "telephoto-ish" than you might think.



camera {    location  <0, 1, -9>
  direction z*1
  sky       y
  up        y
  right     x*image_width/image_height
  look_at   <0,2.5,0>
  translate -x
}
I did play with smaller angles but I wanted the upper sky to show up.

G.

--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters


>
> later,
> Glen
>
>
> Later,
> Glen
>
> 7no### [at] ezwvcom     (Remove the numeral "7")


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From: Glen Berry
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 12:52:10
Message: <Ld7jPJT1Hiw1qvpBZEmV2qvk5VD3@4ax.com>


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From: ingo
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 13:20:27
Message: <Xns9210C53D7EC18seed7@povray.org>
in news:Ld7jPJT1Hiw1qvpBZEmV2qvk5VD3@4ax.com Glen Berry wrote:

> On Thu, 16 May 2002 17:36:52 +0200, "Gilles Tran" <tra### [at] inapginrafr>
> wrote:
> 

>>
>>camera {    location  <0, 1, -9>
>>  direction z*1
>>  sky       y
>>  up        y
>>  right     x*image_width/image_height
>>  look_at   <0,2.5,0>
>>  translate -x
>>}
>>I did play with smaller angles but I wanted the upper sky to show up.
> 
> Since you didn't specify angle with the angle keyword, I'm assuming

> 

the default angle:
 ~67.380 (direction_length=0.5*right_length/tan(angle/2))

in this image that would be the vertical angle.

Ingo


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From: Glen Berry
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 13:30:18
Message: <C+vjPEcZkwirthwHPTNSSxwgE4zg@4ax.com>


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From: ingo
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 13:33:44
Message: <Xns9210C77E41321seed7@povray.org>
in news:XcXjPBsriyKH8vQxmIfuefbvVqsc@4ax.com Glen Berry wrote:

> You would need a large lens aperture, however.
>

One of the nice things of POV-Ray, one can use extreme apertures. A 17mm 
lens with a DOF of a few mm's.

> Of course this was only a rough simulation, and was not intended to be
> an accurate modeling of any particular lens focal length and aperture
> combination.

I know. Else I would have complained about the lack of blurr on the 
mountains above the 2CV :)
 
> You have made me curious about something. I would like to know what
> camera angle Gilles used in this scene? I think the angle of view is
> perhaps more "telephoto-ish" than you might think.
> 

Wouldn't be fair to guess/answer that now, after reading the other posts 
on the subject.

Ingo


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From: Gilles Tran
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 13:39:17
Message: <3ce3eec5$1@news.povray.org>

Ld7jPJT1Hiw1qvpBZEmV2qvk5VD3@4ax.com...
> Since you didn't specify angle with the angle keyword, I'm assuming



Not that I'm sure of what it means anyway, which is why I keep using
"direction" instead...

G.

--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters


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From: ingo
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 13:39:41
Message: <Xns9210C88082299seed7@povray.org>
in news:C+vjPEcZkwirthwHPTNSSxwgE4zg@4ax.com Glen Berry wrote:

> I'm just not sure how the "horizontal" viewing angle applies to the
> vertical dimension in this case.
> 

Lazy as I am I didn't calulate anything. In the default situation with a 

images the only difference is that the aspect ratio is 3/4. As if you 

angle. The diagonal angle stays the same.

Ingo


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From: Tek
Subject: Re: Not for sale anymore (120 kbu) (1/1)
Date: 16 May 2002 14:32:46
Message: <3ce3fb4e@news.povray.org>
Gilles Tran <tra### [at] inapginrafr> wrote in message
news:3ce3eec5$1@news.povray.org...


Yeah, because you specified up right and direction, that will determine the
angle. In this case direction is the same length as up, which means you'll have
a 90 degree vertical angle (i.e. both the top and bottom of the view fustrum
will be at 45 degrees from the direction, so 90 degrees in total).

This means your horizontal view angle will be
2*degrees(atan2(image_width/image_height,1))
but now I'm just trying to blind you all with maths :)

--
Tek
http://www.evilsuperbrain.com


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