Either I just cannot find it in the docu or it is not there. 

povdoc_206.html states for image_map: 

IMAGE_MAP:
    pigment
    {
        image_map
        {
            [BITMAP_TYPE] "bitmap[.ext]"
            [IMAGE_MAP_MODS...]
        }
        [PIGMENT_MODFIERS...]
    }
BITMAP_TYPE:
    gif | tga | iff | ppm | pgm | png | jpeg | tiff | sys
IMAGE_MAP_MOD:
    map_type Type | once | interpolate Type | 
    filter Palette, Amount | filter all Amount |
    transmit Palette, Amount | transmit all Amount

The following IMAGE_MAP_MODs are recognized by POVRay and not mentioned 
in the docu: 

    repeat <u,v>
    offset <u,v>

I suggest adding them to the docu together with some explanation on 
what they are good for. 

Wolfgang

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In article <401293d6@news.povray.org> , Wolfgang Wieser <wwi### [at] gmxde>  
wrote:

> The following IMAGE_MAP_MODs are recognized by POVRay and not mentioned
> in the docu:
>
>     repeat <u,v>
>     offset <u,v>
>
> I suggest adding them to the docu together with some explanation on
> what they are good for.

As there "features" are the result of an apparent accident probably when
merging some ancient MegaPOV sources into 3.5 during its development, it
would be fatal to declare them to official features just because they exist.
Without testing, they should neither be added nor used at all!  Nor should
their design be regarded final or acceptable without review.

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

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Thorsten Froehlich wrote:

> In article <401293d6@news.povray.org> , Wolfgang Wieser <wwi### [at] gmxde>
> wrote:
> 
>> The following IMAGE_MAP_MODs are recognized by POVRay and not mentioned
>> in the docu:
>>
>>     repeat <u,v>
>>     offset <u,v>
>>
>> I suggest adding them to the docu together with some explanation on
>> what they are good for.
> 
> As there "features" are the result of an apparent accident probably when
> merging some ancient MegaPOV sources into 3.5 during its development, it
> would be fatal to declare them to official features just because they
> exist.
> Without testing, they should neither be added nor used at all!  Nor should
> their design be regarded final or acceptable without review.
>
I see. 

The problem is that in order to test them, it would be good to 
have some docu which clearly states what they are meant to do. 

Otherwise they may end up in being some undocumented secred feature 
or people forget about it... 

Wolfgang

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Thorsten Froehlich wrote:
> [...]
> 
> As there "features" are the result of an apparent accident probably when
> merging some ancient MegaPOV sources into 3.5 during its development, it
> would be fatal to declare them to official features just because they exist.
> Without testing, they should neither be added nor used at all!  Nor should
> their design be regarded final or acceptable without review.

The interesting thing is that this 'feature' is not in MegaPOV 0.7. 
There is 'ImagePhasePatch' which adds frequency and phase keywords for 
image_maps but no repeat and offset.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 11 Jan. 2004 _____./\/^>_*_<^\/\.______

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Christoph Hormann <chr### [at] gmxde> wrote:
> The interesting thing is that this 'feature' is not in MegaPOV 0.7. 
> There is 'ImagePhasePatch' which adds frequency and phase keywords for 
> image_maps but no repeat and offset.

  Mysterious... Where did these keywords appear? From outer space? :P

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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In article <4012b37b@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

>> The interesting thing is that this 'feature' is not in MegaPOV 0.7.
>> There is 'ImagePhasePatch' which adds frequency and phase keywords for
>> image_maps but no repeat and offset.
>
>   Mysterious... Where did these keywords appear? From outer space? :P

Very good question!  Were they every mentioned anywhere?  I don't recall
ever reading about them.  On the other hand, there had been soooo many
internal discussions about POV-Ray 3.5 features, it is almost impossible to
remember every single one several years later :-)

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org

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In article <4012a9bd@news.povray.org>, Wolfgang Wieser <wwi### [at] gmxde> 
wrote:

> The problem is that in order to test them, it would be good to 
> have some docu which clearly states what they are meant to do. 

Well, if they were supposed to be in the public beta, they would have 
been documented. Because they weren't supposed to be there, they weren't 
documented or tested, and should not be considered to be official 
features.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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Christopher James Huff wrote:

>> The problem is that in order to test them, it would be good to
>> have some docu which clearly states what they are meant to do.
> 
> Well, if they were supposed to be in the public beta, they would have
> been documented. Because they weren't supposed to be there, they weren't
> documented or tested, and should not be considered to be official
> features.
> 
Well, as every human being tends to make mistakes, wouldn't it be 
a probable assumption that they were simply forgot?

Wolfgang

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