ARTis wrote:
> 
> Can someone explain how to make PNG's with an alpha channel with POV?

IIRC, use PNG as output format, and add the +UA switch to the
command-line. It's in the docs.

-- 
Adrien Beau   adr### [at] freefr   http://adrien.beau.free.fr/

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No, but if you work with web pages at all, and you're interested in using
transparent images in IE, there's an Active-X object that loads a PNG file
and displays it as a transparent image, basically simulating as though the
PNG were just any other image on the page. There's a script which does the
conversion from image tags to this Active-Xobject easily at
http://www.youngpup.net/?request=/snippets/sleight.xml

- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]

"Mahalis" <don### [at] fakeycom> wrote in message
news:3bed24dc$1@news.povray.org...
> Does IE6 show PNG transparency properly?
>
> --
>
> //Mahalis
> camera{location<0,0.25,-2> look_at 0.5*y} #declare
T=texture{pigment{crackle
> scale 0.5 rotate 90 turbulence 0.75 color_map{[0 rgb 1][0.05 rgb 1][0.1
> rgb<1,0.25,1>][0.25 rgbf 1][1 rgbf 1]}} finish{ambient 1}} #declare
> c=difference{torus{0.5,0.1 rotate -90*x}box{<0.7,0,0.2>,<-0.7,-0.7,-0.2>}}
> merge{object{c translate<0.5,0.5,0>} object{c translate<-0.5,0.5,0>}
> cylinder{<1,0.5,0>,<1,0,0>,0.1} cylinder{<-1,0.5,0>,<-1,0,0>,0.1}
> cylinder{0.5*y,0,0.1} texture{T}}
> --
>
>
> "Warp" <war### [at] tagpovrayorg> wrote in message
> news:3bed1c99@news.povray.org...
> > QuadHall <tre### [at] ww-interlinknet> wrote:
> > : Recently (I think) there were some postings in one of the povray
> newsgroups
> > : involving POV produced PNG files (with an alpha channel) and the
> internet
> > : browsers that properly displayed such images.  One of these postings,
if
> my
> > : questionable memory serves me, had a link to an example web page-->I
> think
> > : it had a png image of a lit match against some sort of varied
background
> .
> > : Does anyone remember seeing these posts? (and if so, which newsgroup,
> date,
> > : etc?)  thanks.....
> >
> >   I think that post was made by me. I don't remember which thread it
was,
> > though.
> >   The page is this one:
> >
> > http://www.cs.tut.fi/~warp/alphatest.html
> >
> >   If the browser supports alpha properly, it should look like this:
> >
> > http://www.cs.tut.fi/~warp/alphatestsnapshot.jpg
> >
> >   The only browsers I know that support the alpha channel properly are
> > Netscape 6.x, Mozilla 0.9.x (which is practically the same thing) and
> > Internet Explorer 5.x for MacOS (the Windows version has no proper
> support).
> >
> > --
> > #macro N(D,I)#if(I<6)cylinder{M()#local
D[I]=div(D[I],104);M().5,2pigment{
> > rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro
M()<mod(D[I],13)-6,mod(div(D[I
> > ],13),8)-3,10>#end blob{N(array[6]{11117333955,
> > 7382340,3358,3900569407,970,4254934330},0)}//                     -
Warp -
>
>

Post a reply to this message

Thanks, that's what I was looking for.  I had just downloaded IE6 and wanted
to see if it properly supported PNG alpha channels.....it doesn't.  Oh
well.......anyways, thanks again,

Quadhall

"Warp" <war### [at] tagpovrayorg> wrote in message
news:3bed1c99@news.povray.org...
> QuadHall <tre### [at] ww-interlinknet> wrote:
> : Recently (I think) there were some postings in one of the povray
newsgroups
> : involving POV produced PNG files (with an alpha channel) and the
internet
> : browsers that properly displayed such images.  One of these postings, if
my
> : questionable memory serves me, had a link to an example web page-->I
think
> : it had a png image of a lit match against some sort of varied background
.
> : Does anyone remember seeing these posts? (and if so, which newsgroup,
date,
> : etc?)  thanks.....
>
>   I think that post was made by me. I don't remember which thread it was,
> though.
>   The page is this one:
>
> http://www.cs.tut.fi/~warp/alphatest.html
>
>   If the browser supports alpha properly, it should look like this:
>
> http://www.cs.tut.fi/~warp/alphatestsnapshot.jpg
>
>   The only browsers I know that support the alpha channel properly are
> Netscape 6.x, Mozilla 0.9.x (which is practically the same thing) and
> Internet Explorer 5.x for MacOS (the Windows version has no proper
support).
>
> --
> #macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
> rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
> ],13),8)-3,10>#end blob{N(array[6]{11117333955,
> 7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

Post a reply to this message

Just tried the script with IE6 and Warp's example page-->works fine, now
I've got to try getting POV to make a few PNG files with alpha channels and
slap 'em into some web pages...........

Quadhall

"Slime" <noo### [at] hotmailcom> wrote in message
news:3bed8e57@news.povray.org...
> No, but if you work with web pages at all, and you're interested in using
> transparent images in IE, there's an Active-X object that loads a PNG file
> and displays it as a transparent image, basically simulating as though the
> PNG were just any other image on the page. There's a script which does the
> conversion from image tags to this Active-Xobject easily at
> http://www.youngpup.net/?request=/snippets/sleight.xml
>
> - Slime
> [ http://www.slimeland.com/ ]
> [ http://www.slimeland.com/images/ ]
>
> "Mahalis" <don### [at] fakeycom> wrote in message
> news:3bed24dc$1@news.povray.org...
> > Does IE6 show PNG transparency properly?
> >
> > --
> >
> > //Mahalis
> > camera{location<0,0.25,-2> look_at 0.5*y} #declare
> T=texture{pigment{crackle
> > scale 0.5 rotate 90 turbulence 0.75 color_map{[0 rgb 1][0.05 rgb 1][0.1
> > rgb<1,0.25,1>][0.25 rgbf 1][1 rgbf 1]}} finish{ambient 1}} #declare
> > c=difference{torus{0.5,0.1
rotate -90*x}box{<0.7,0,0.2>,<-0.7,-0.7,-0.2>}}
> > merge{object{c translate<0.5,0.5,0>} object{c translate<-0.5,0.5,0>}
> > cylinder{<1,0.5,0>,<1,0,0>,0.1} cylinder{<-1,0.5,0>,<-1,0,0>,0.1}
> > cylinder{0.5*y,0,0.1} texture{T}}
> > --
> >
> >
> > "Warp" <war### [at] tagpovrayorg> wrote in message
> > news:3bed1c99@news.povray.org...
> > > QuadHall <tre### [at] ww-interlinknet> wrote:
> > > : Recently (I think) there were some postings in one of the povray
> > newsgroups
> > > : involving POV produced PNG files (with an alpha channel) and the
> > internet
> > > : browsers that properly displayed such images.  One of these
postings,
> if
> > my
> > > : questionable memory serves me, had a link to an example web page-->I
> > think
> > > : it had a png image of a lit match against some sort of varied
> background
> > .
> > > : Does anyone remember seeing these posts? (and if so, which
newsgroup,
> > date,
> > > : etc?)  thanks.....
> > >
> > >   I think that post was made by me. I don't remember which thread it
> was,
> > > though.
> > >   The page is this one:
> > >
> > > http://www.cs.tut.fi/~warp/alphatest.html
> > >
> > >   If the browser supports alpha properly, it should look like this:
> > >
> > > http://www.cs.tut.fi/~warp/alphatestsnapshot.jpg
> > >
> > >   The only browsers I know that support the alpha channel properly are
> > > Netscape 6.x, Mozilla 0.9.x (which is practically the same thing) and
> > > Internet Explorer 5.x for MacOS (the Windows version has no proper
> > support).
> > >
> > > --
> > > #macro N(D,I)#if(I<6)cylinder{M()#local
> D[I]=div(D[I],104);M().5,2pigment{
> > > rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro
> M()<mod(D[I],13)-6,mod(div(D[I
> > > ],13),8)-3,10>#end blob{N(array[6]{11117333955,
> > > 7382340,3358,3900569407,970,4254934330},0)}//                     -
> Warp -
> >
> >
>
>

Post a reply to this message

Slime <noo### [at] hotmailcom> wrote:
: No, but if you work with web pages at all, and you're interested in using
: transparent images in IE, there's an Active-X object that loads a PNG file

  And makes the page Windows-IE-only?

  (And you could people PLEASE quote properly?)

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

Post a reply to this message

In article <3bee2c61@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

>   And makes the page Windows-IE-only?

What, the web wasn't invented by Microsoft?

    Thorsten

Post a reply to this message

The kindly Rev. overheard Warp <war### [at] tagpovrayorg> saying on 11 Nov
2001: 

> Slime <noo### [at] hotmailcom> wrote:
>: No, but if you work with web pages at all, and you're interested
>: in using transparent images in IE, there's an Active-X object that
>: loads a PNG file 
> 
>   And makes the page Windows-IE-only?

Nope, it means that Microsoft has adhered to published standards.  So 
has Netscape, sort of.

I'm happy to bash Microsoft for any legitimate reason, but this isn't 
one of them.
-- 
Rev. Bob "Bob" Crispen
crispen at hiwaay dot net

A dead thing can go with a stream, only a living thing can go
against it. - G.K. Chesterton

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> IIRC, use PNG as output format, and add the +UA switch to the
> command-line. It's in the docs.

Thank you.

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In article <Xns91562ADE035A4revbob@127.0.0.1> , revbob@the.rectory (Rev. Bob
'Bob' Crispen) wrote:

>>: No, but if you work with web pages at all, and you're interested
>>: in using transparent images in IE, there's an Active-X object that
>>: loads a PNG file
>>
>>   And makes the page Windows-IE-only?
>
> Nope, it means that Microsoft has adhered to published standards.  So
> has Netscape, sort of.
>
> I'm happy to bash Microsoft for any legitimate reason, but this isn't
> one of them.

Since when is ActiveX an Internet standard???


    Thorsten

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Thorsten Froehlich wrote:
> 
> Since when is ActiveX an Internet standard???

Perhaps he was speaking about the ability to load a PNG in
a web page?

-- 
Adrien Beau   adr### [at] freefr   http://adrien.beau.free.fr/

Post a reply to this message