status of node.write

status of node.write

[Michail Vidiassov]

Dear All,

I notice that broken code for inserting movies uses
node.write in codeinjections.insertmovie (in back-pdf.lua),
while figures.checkers.mov (in grph-inc.lua) expects text return
from codeinjections.insertmovie to feed to "texsprint(ctxcatcodes".

The 3D annotation code (it also seems not to work) has
node.write variant commented out and replaced with
"texsprint(ctxcatcodes" with "brrrr" comment!

    local annot, preview, ref = backends.pdf.helpers.insert3d {
       ......
     }
  -- node.write(pdfannotation(width,-height,0,annot()))
     texsprint(ctxcatcodes,format("\\pdfannot width %ssp height %ssp {%s}",width,height,annot())) -- brrrr
--~     if ref then -- wrong ! a direct ref should work
--~         texsprint(ctxcatcodes,format("\\smash{\\pdfrefximage%s\\relax}",ref)) -- 
brrrr
--~     end
     texsprint(ctxcatcodes,"\\stopfoundexternalfigure")

And the question is: does it make sense to try to make the current 3D 
annotation handling code work by complaining to the maintainers and/or
fixing it myself or nothing is supposed to work till migration to 
from "texsprint(ctxcatcodes" API to "node.write" API is complete?

              Sincerely, Michail
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Re: status of node.write

[luigi scarso]

On Wed, Mar 24, 2010 at 10:23 AM, Michail Vidiassov <master@iaas.msu.ru> wrote:
> Dear All,
>
> I notice that broken code for inserting movies uses
> node.write in codeinjections.insertmovie (in back-pdf.lua),
> while figures.checkers.mov (in grph-inc.lua) expects text return
> from codeinjections.insertmovie to feed to "texsprint(ctxcatcodes".
>
> The 3D annotation code (it also seems not to work) has
> node.write variant commented out and replaced with
> "texsprint(ctxcatcodes" with "brrrr" comment!
>
>   local annot, preview, ref = backends.pdf.helpers.insert3d {
>      ......
>    }
>  -- node.write(pdfannotation(width,-height,0,annot()))
>    texsprint(ctxcatcodes,format("\\pdfannot width %ssp height %ssp
> {%s}",width,height,annot())) -- brrrr
> --~     if ref then -- wrong ! a direct ref should work
> --~
> texsprint(ctxcatcodes,format("\\smash{\\pdfrefximage%s\\relax}",ref)) --
> brrrr
> --~     end
>    texsprint(ctxcatcodes,"\\stopfoundexternalfigure")
>
> And the question is: does it make sense to try to make the current 3D
> annotation handling code work by complaining to the maintainers and/or
> fixing it myself or nothing is supposed to work till migration to from
> "texsprint(ctxcatcodes" API to "node.write" API is complete?
I'm pretty sure that I still don't understand much , but
I have written an article for including swf in mkiv , cfr
http://wiki.pctex.com/index.php/PracTeXJournal

PracTeXJournal should be on-line next month,
and I have planned  2nd part x next issue.

I'm watching at your u3d files to maintains same style.
-- 
luigi
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Re: status of node.write

[Hans Hagen]

On 24-3-2010 10:23, Michail Vidiassov wrote:
> Dear All,
>
> I notice that broken code for inserting movies uses
> node.write in codeinjections.insertmovie (in back-pdf.lua),
> while figures.checkers.mov (in grph-inc.lua) expects text return
> from codeinjections.insertmovie to feed to "texsprint(ctxcatcodes".

i need a test


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___________________________________________________________________________________

Re: status of node.write

[Michail Vidiassov]

Dear Luigi and All,

On Wed, 24 Mar 2010, luigi scarso wrote:

> I'm pretty sure that I still don't understand much , but
> I have written an article for including swf in mkiv , cfr

am I correct to assume that swf inclusion works ok and is done in a 
current kosher way in latest minimals
and so can be used as a reference for inclusion of other types?

          Sincerely, Michail
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Re: status of node.write

[luigi scarso]

On Wed, Mar 24, 2010 at 11:53 AM, Michail Vidiassov <master@iaas.msu.ru> wrote:
> Dear Luigi and All,
>
> On Wed, 24 Mar 2010, luigi scarso wrote:
>
>> I'm pretty sure that I still don't understand much , but
>> I have written an article for including swf in mkiv , cfr
>
> am I correct to assume that swf inclusion works ok and is done in a current
> kosher way in latest minimals
> and so can be used as a reference for inclusion of other types?
>
>         Sincerely, Michail
No no no, and I'm sorry for misunderstanding.
In practex I have written a really dirty way to include a swf in mkiv
based on flashmovie.sty .
Hans provided me the skeleton -- like yours u3d files --- and I must
rewrite a 2nd article to implement the mkiv way.
So in no way files in minimals are ready for swf embedding:
it's  still a test, because flash player embedded  AdobeRead is
absolutely  new for me .

Anyway it's my next project --- after I've finished some articles abut
FellType, ~next week.



-- 
luigi
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___________________________________________________________________________________

Re: status of node.write

[Michail Vidiassov]

Dear Luigi and All,

On Wed, 24 Mar 2010, luigi scarso wrote:

> Hans provided me the skeleton -- like yours u3d files --- and I must
> rewrite a 2nd article to implement the mkiv way.

And where the mkiv way is to be studued?
What kinds of inclusion not only work, but are implemented
in the modern way and so are fit to be emulated?
Is node.write mkiv way or not yet?

                       Sincerely, Michail
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Re: status of node.write

[Hans Hagen]

On 24-3-2010 10:52, luigi scarso wrote:

> I'm watching at your u3d files to maintains same style.

there is u3d support presen tbut nobody tested it

also, we can only improve it if we have a proper test set (also true for 
swf) that we can add to the samples section, simple public tests

Hans

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___________________________________________________________________________________

Re: status of node.write

[luigi scarso]

On Wed, Mar 24, 2010 at 2:02 PM, Michail Vidiassov <master@iaas.msu.ru> wrote:
> Dear Luigi and All,
>
> On Wed, 24 Mar 2010, luigi scarso wrote:
>
>> Hans provided me the skeleton -- like yours u3d files --- and I must
>> rewrite a 2nd article to implement the mkiv way.
>
> And where the mkiv way is to be studued?
> What kinds of inclusion not only work, but are implemented
> in the modern way and so are fit to be emulated?
> Is node.write mkiv way or not yet?
>
>                      Sincerely, Michail
As I wrote, I quite don't understand well this area.
For now I can say that the mkiv way is a mix of lua and tex, while
the latex/mkii/pdftex tex way is described in flashmovie.sty
Also Adobe Supplement to the ISO 32000 base version 1.7 extensione
level 3 is the guideline.

I much prefear to code by myself without ask for Hans now,
it's a way to understand this aspect that I don't manage well.


-- 
luigi
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Re: status of node.write

[Hans Hagen]

On 24-3-2010 15:20, luigi scarso wrote:
> On Wed, Mar 24, 2010 at 2:02 PM, Michail Vidiassov<master@iaas.msu.ru>  wrote:
>> Dear Luigi and All,
>>
>> On Wed, 24 Mar 2010, luigi scarso wrote:
>>
>>> Hans provided me the skeleton -- like yours u3d files --- and I must
>>> rewrite a 2nd article to implement the mkiv way.
>>
>> And where the mkiv way is to be studued?
>> What kinds of inclusion not only work, but are implemented
>> in the modern way and so are fit to be emulated?
>> Is node.write mkiv way or not yet?
>>
>>                       Sincerely, Michail
> As I wrote, I quite don't understand well this area.
> For now I can say that the mkiv way is a mix of lua and tex, while
> the latex/mkii/pdftex tex way is described in flashmovie.sty
> Also Adobe Supplement to the ISO 32000 base version 1.7 extensione
> level 3 is the guideline.
>
> I much prefear to code by myself without ask for Hans now,
> it's a way to understand this aspect that I don't manage well.

it is already coded .. see back-u3d.mkiv for the interface

when given examples of something that does not work i can repair it

mkii/sty files are of no use here as things need to fit into the context 
user interface

Hans

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Re: status of node.write

[Michail Vidiassov]

Dear Hans,

> when given examples of something that does not work i can repair it

take a look at http://www.ntg.nl/pipermail/ntg-context/2010/047898.html
- it is about problem with movies, but movies and u3d are both done via
annotations, thus there are similarities.

> it is already coded .. see back-u3d.mkiv for the interface

the interface seems to be disfunctional now, I'll supply examples
once I get to a computer with working luatex
(my personal one is still disfunctional since the fix for luatex problem
I reported at http://www.ntg.nl/pipermail/ntg-context/2010/048022.html did
not find its way to precompiled binaries yet).

               Sincerely, Michail

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PDF annotations problems - was: status of node.write

[Michail Vidiassov]

Dear Hans,

On Wed, 24 Mar 2010, Hans Hagen wrote:

> when given examples of something that does not work i can repair it

in lpdf-ini.lua one can find the following utility function for setting a 
boolean config parameter:

local function pdfboolean(b,default)
     if ((type(b) == "boolean") and b) or default then
         return p_true
     else
         return p_false
     end
end

How is it supposed to work if the config parameter has value "false" and 
default value is "true"? It seems in this case the value of "b" is ignored.

    Sincerely, Michail
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Re: status of node.write

[Hans Hagen]

On 24-3-2010 17:46, Michail Vidiassov wrote:
> Dear Hans,
>
>> when given examples of something that does not work i can repair it
>
> take a look at http://www.ntg.nl/pipermail/ntg-context/2010/047898.html
> - it is about problem with movies, but movies and u3d are both done via
> annotations, thus there are similarities.

i uploaded a new version, movies seem to work, u3d not tested

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3D annotations - was: status of node.write

[Michail Vidiassov]

Dear Hans,

On Wed, 24 Mar 2010, Hans Hagen wrote:

> there is u3d support presen tbut nobody tested it

thank you for your latest effort to put u3d support in a working state,
but as of now even the most basic test from back-u3d.mkiv does not work 
and is not supposed to:

grph-u3d.lua needs adding to the preamble

local pdfannotation   = nodes.pdfannotation
local todimen         = string.todimen

and replacing

node.write(annotation... with node.write(pdfannotation(annotation...

to at least make code run without throwing error messages.

lpdf-u3d.lua has more severe problem:

         --  weird, has to be a /Form and not an /Image so we need a wrap = true key
         --  local figure = img.immediatewrite { filename = preview, width = width, height = height }
             local figure = img.immediatewrite { stream = ".5 .75 .75 rg 0 0 20 10 re f", bbox = {0,0,20,10 } }

shows that option to include a bitmap preview image into 3d 
annotation is just commented out.

On the other hand, an approach like in LaTeX package attachfile2 may be 
convenient - a PDF with just 3D annotation and minimal support elements 
(with or without preview) is attached to the main document, that has a 
clickable image that activates that attached PDF document in a separate 
window.
In this case the preparation of the attaced PDF can be 
completely delegated to external utility.
Does attachfile2 analog work in ConTeXt now?
Where to look for usage examples?

         Sincerely, Michail


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Re: 3D annotations - was: status of node.write

[Hans Hagen]

On 25-3-2010 20:12, Michail Vidiassov wrote:

> to at least make code run without throwing error messages.

new beta

Hans


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Re: 3D annotations

[Michail Vidiassov]

Dear Hans,

On Thu, 25 Mar 2010, Michail Vidiassov wrote:

> On Wed, 24 Mar 2010, Hans Hagen wrote:
>
>> there is u3d support presen tbut nobody tested it
>
> thank you for your latest effort to put u3d support in a working state, but

now that Adobe has fallen in love with a new 3D format, PRC, the following 
is to be changed:

lpdf-u3d.lua

      if not stream then
          local attr = pdfdictionary {
              Type    = pdfconstant("3D"),
-            Subtype = pdfconstant("U3D"),
          }
+        if string.upper(string.sub(foundname,-4))==".PRC" then
+            attr.Subtype = pdfconstant("PRC")
+        else
+            attr.Subtype = pdfconstant("U3D")
+        end
          local streamviews = checkedkey(streamparam, "views", "table")
          if streamviews then
              local list = pdfarray()

May be a more robust way is to read first 3 bytes of the model file, since
"U3D" or "PRC" signature is always there - that can be done instead of 
relying on file name extension or only in case it it not "u3d" or "prc".

Also PRC annotations have to trigger setting PDF version to 1.7.3
(developer extensions dictionary mechanism).
It can be done per your advice directly

\doPDFaddtocatalog {
   /Extensions
     <</ADBE
         <</BaseVersion /1.7
           /ExtensionLevel 3
         >>
     >>
}

But what about an interface like \pdfmicroversion and
automatic pushing up of PDF version once PRC annontation happens?

Also I try to remind you about pdfboolean problem in lpdf-ini.lua
(old code is not OK if b is "false" and default is "true")

  local function pdfboolean(b,default)
-    if ((type(b) == "boolean") and b) or default then
-        return p_true
+    if type(b) ~= "boolean" then
+        if default then
+            return p_true
+        else
+            return p_false
+        end
      else
-        return p_false
+        if b then
+            return p_true
+        else
+            return p_false
+        end
      end
  end

        Sincerely, Michail

PS. And a great palliative way to deal with 3D annotations is via
attaching a 3D PDF file made with LaTeX (by Asymptote, for example).

But while your method of answering my messages in lua works OK for
new code (updating minimals and making a diff with old code is not
harder than checking e-mail inbox - "Your morning patch, sir!" ;),
I can not deduce from existing sea of ConTeXt code the status of file attachments support.
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Re: 3D annotations

[Hans Hagen]

On 26-3-2010 6:53, Michail Vidiassov wrote:

> lpdf-u3d.lua
>
> if not stream then
> local attr = pdfdictionary {
> Type = pdfconstant("3D"),
> - Subtype = pdfconstant("U3D"),
> }
> + if string.upper(string.sub(foundname,-4))==".PRC" then
> + attr.Subtype = pdfconstant("PRC")
> + else
> + attr.Subtype = pdfconstant("U3D")
> + end
> local streamviews = checkedkey(streamparam, "views", "table")
> if streamviews then
> local list = pdfarray()
>
> May be a more robust way is to read first 3 bytes of the model file, since
> "U3D" or "PRC" signature is always there - that can be done instead of
> relying on file name extension or only in case it it not "u3d" or "prc".

more like:

         local subtype, subdata = "U3D", io.readdata(foundname) or ""
         if find(subdata,"^PRC") then
             subtype == "PRC"
         elseif find(subdata,"^U3D") then
             subtype == "U3D"
         elseif file.extname(foundname) == "prc" then
             subtype == "PRC"
         end

> Also PRC annotations have to trigger setting PDF version to 1.7.3
> (developer extensions dictionary mechanism).
> It can be done per your advice directly
>
> \doPDFaddtocatalog {
> /Extensions
> <</ADBE
> <</BaseVersion /1.7
> /ExtensionLevel 3
>  >>
>  >>
> }
>
> But what about an interface like \pdfmicroversion and
> automatic pushing up of PDF version once PRC annontation happens?

i don't know that command and anyway want to get rid of all commands 
that start with \pdf

concerning versions ... peter rolf and i are working on detailed support 
for standards (also related to preflighting) and before i even want to 
look in some automated version handling we first need to get that bit 
done well

> Also I try to remind you about pdfboolean problem in lpdf-ini.lua
> (old code is not OK if b is "false" and default is "true")
>
> local function pdfboolean(b,default)
> - if ((type(b) == "boolean") and b) or default then
> - return p_true
> + if type(b) ~= "boolean" then
> + if default then
> + return p_true
> + else
> + return p_false
> + end
> else
> - return p_false
> + if b then
> + return p_true
> + else
> + return p_false
> + end
> end
> end

i need to check it ... later (also for interferences)


> PS. And a great palliative way to deal with 3D annotations is via
> attaching a 3D PDF file made with LaTeX (by Asymptote, for example).

well, one can attach files as-is already (unless it's broken)

> I can not deduce from existing sea of ConTeXt code the status of file
> attachments support.

\attachment has been there for ages

actually, all kind of annotations hav ebeen supported as soon as they 
showed up in acrobat (mediademo is an exmaple of flash) but i gave up on 
implementing these things too early as in acrobat/pdf such new tricks 
normally needs a few versions to reach stability

Hans

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Re: 3D annotations

[Michail Vidiassov]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 2049 bytes --]

Dear gummybears,

On Tue, 4 May 2010, gummybears wrote:

>       I read your email (17 april 2010) on the mailing list and applied the two
>       patches to my Context minimal distro
>       (the very latest version). When I run your test.tex through context the
>       preview image test.png is not shown.
> 
> 
> >did you recreate formats after patch
> 
> Probably not (my mistake), but now I did make the formats and with the current minimals
> I got the following error (when running your test.tex file)
> bodyfont        : 12pt rm is loaded
> language        : language en is active
> systems         : begin file test.tex at line 3
> floatblocks     : 1 placed
> ! LuaTeX error ...text/tex/texmf-context/tex/context/base/lpdf-mis.lua:163: attempt to call field 'timestamp' (a nil value)
> stack traceback:
>     ...text/tex/texmf-context/tex/context/base/lpdf-mis.lua:163: in function 'setupidentity'
>     <main ctx instance>:1: in main chunk.
> \synchronizebackendidentity ...akeyword \!!es , }}
> 
> \actualshipout ...lio \or \the \everyfirstshipout
>                                                   \global \everyfirstshipout...
> \myshipout ...\@@ppmethod }\gobbleoneargument {#1}
>                                                   \setnextrealpageno \afters...
> \dofinaloutput ...hbox {\vbox {\dopagebody #1#2}}}
>                                                   \the \everyaftershipout \a...
> \finaloutput ...EAEAEA \dofinaloutput \fi \fi #1#2
>                                                   \resetselectiepagina \incr...
> \sidefloatoutput ...e \else \finalsidefloatoutput
>                                                   \global \sidefloatvsize \n...
> ...
> l.23 \stopTEXpage
> 
> Which version of ConText should I use to make it work?

I have just downloaded the latest version (2010.04.29 22:30) to my
Mac OS X 10.6.3, patched, run test.tex and got no problem.

May be you can describe our setup in more detail (context version, OS,
32/64 bit).

Sincerely, michail



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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: 3D annotations

[gummybears]

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On Sun, 2 May 2010, gummybears wrote:

I read your email (17 april 2010) on the mailing list and applied the two
patches to my Context minimal distro
(the very latest version). When I run your test.tex through context the
preview image test.png is not shown.


>did you recreate formats after patch
>("context -make" if memory serves me right)?
>I will test with current minimals today.

Probably not (my mistake), but now I did make the formats and with the
current minimals
I got the following error (when running your test.tex file)
bodyfont        : 12pt rm is loaded
language        : language en is active
systems         : begin file test.tex at line 3
floatblocks     : 1 placed
! LuaTeX error ...text/tex/texmf-context/tex/context/base/lpdf-mis.lua:163:
attempt to call field 'timestamp' (a nil value)
stack traceback:
    ...text/tex/texmf-context/tex/context/base/lpdf-mis.lua:163: in function
'setupidentity'
    <main ctx instance>:1: in main chunk.
\synchronizebackendidentity ...akeyword \!!es , }}

\actualshipout ...lio \or \the \everyfirstshipout
                                                  \global
\everyfirstshipout...
\myshipout ...\@@ppmethod }\gobbleoneargument {#1}
                                                  \setnextrealpageno
\afters...
\dofinaloutput ...hbox {\vbox {\dopagebody #1#2}}}
                                                  \the \everyaftershipout
\a...
\finaloutput ...EAEAEA \dofinaloutput \fi \fi #1#2
                                                  \resetselectiepagina
\incr...
\sidefloatoutput ...e \else \finalsidefloatoutput
                                                  \global \sidefloatvsize
\n...
...
l.23 \stopTEXpage

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___________________________________________________________________________________
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___________________________________________________________________________________

Re: 3D annotations

[gummybears]

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Hi Michail,

I read your email (17 april 2010) on the mailing list and applied the two
patches to my Context minimal distro
(the very latest version). When I run your test.tex through context the
preview image test.png
is not shown.

Which version of ConText should I use to make it work

Thanks in advance

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[-- Attachment #2: Type: text/plain, Size: 486 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: 3D annotations

[Michail Vidiassov]

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Dear Hans,

I wrote to you
> thank you for your latest effort to put u3d support in a working state, but

more thanks for more effort, but

> May be a more robust way is to read first 3 bytes of the model file, since
> "U3D" or "PRC" signature is always there - that can be done instead of 
> relying on file name extension or only in case it it not "u3d" or "prc".

you have implemented reading the file signature, but it is now 
almost useless, since if a file has extension other but U3D or PRC
3D annotation code will not be called by file inclusion mechanism
and "io.readdata" routine is called
local subtype, subdata = "U3D", io.readdata(foundname) or ""
- what's that?

One more point - preview bitmap images in 3D annotations are now disabled
since necessary functionality of measuring XForms is missing -
please, consider the following workaround.

--- lpdf-u3d.lua.org	2010-03-26 18:24:44.000000000 +0300
+++ lpdf-u3d.lua	2010-04-14 14:24:28.000000000 +0400
@@ -17,6 +17,7 @@
  local cos, sin, sqrt, pi, atan2, abs = math.cos, math.sin, math.sqrt, math.pi, math.atan2, math.abs

  local pdfconstant   = lpdf.constant
+local pdfnumber     = lpdf.number
  local pdfboolean    = lpdf.boolean
  local pdfunicode    = lpdf.unicode
  local pdfdictionary = lpdf.dictionary
@@ -62,8 +63,7 @@

  local function make3dview(view)

-    local name = viewname
-    local name = pdfunicode((view.name ~= "" and name) or "unknown view")
+    local name = pdfunicode((view.name ~= "" and view.name) or "unknown view")

      local viewdict = pdfdictionary {
         Type = pdfconstant("3DView"),
@@ -311,9 +311,6 @@
          for i=1,#nodes do
              local node = checkedkey(nodes,i,"table")
              if node then
-                local position = checkedkey(node,"position","table")
-                position = position and #position == 12 and pdfarray(position)
-                if position then
                      nodelist[#nodelist+1] = pdfdictionary {
                          Type = pdfconstant("3DNode"),
                          N    = node.name or ("node_" .. i), -- pdfunicode ?
@@ -325,13 +322,18 @@
                          },
                          M    = position,
                      }
+                local position = checkedkey(node,"position","table")
+                position = position and #position == 12 and pdfarray(position)
+                if position then
+                    nodelist[#nodelist].M = position
                  end
              end
        end
-      viewdict.NR = true
        viewdict.NA = nodelist
     end

+    viewdict.NR = true
+
     return viewdict

  end
@@ -349,19 +351,19 @@

      local activationdict = pdfdictionary {
         TB = pdfboolean(param.toolbar,true),
-       NP = pdfboolean(param.tree,true),
+       NP = pdfboolean(param.tree,false),
      }

      local stream = streams[label]
      if not stream then

-        local subtype, subdata = "U3D", io.readdata(foundname) or ""
+        local subtype, subdata = "U3D", file.readdata(foundname) or ""
          if find(subdata,"^PRC") then
-            subtype == "PRC"
+            subtype = "PRC"
          elseif find(subdata,"^U3D") then
-            subtype == "U3D"
+            subtype = "U3D"
          elseif file.extname(foundname) == "prc" then
-            subtype == "PRC"
+            subtype = "PRC"
          end

          local attr = pdfdictionary {
@@ -423,12 +425,35 @@
          local ref = stored_pr[tag]
          if not ref then
          --  weird, has to be a /Form and not an /Image so we need a wrap = true key
-        --  local figure = img.immediatewrite { filename = preview, width = width, height = height }
-            local figure = img.immediatewrite { stream = ".5 .75 .75 rg 0 0 20 10 re f", bbox = {0,0,20,10 } }
+            local figure = img.immediatewrite { filename = preview, width = width, height = height }
+        --  local figure = img.immediatewrite { stream = ".5 .75 .75 rg 0 0 20 10 re f", bbox = {0,0,20,10 } }
              ref = figure.objnum
              stored_pr[tag] = ref
          end
-        annot.AP = ref and pdfdictionary { N = pdfreference(ref) }
+        if ref then
+            local pw   = pdfdictionary {
+                Type      = pdfconstant("XObject"),
+                Subtype   = pdfconstant("Form"),
+                FormType  = pdfnumber(1),
+                BBox      = pdfarray { pdfnumber(0), pdfnumber(0), pdfnumber(factor*width), pdfnumber(factor*height) },
+                Matrix    = pdfarray { pdfnumber(1), pdfnumber(0), pdfnumber(0), pdfnumber(1), pdfnumber(0), pdfnumber(0) },
+                Resources = pdfdictionary {
+                                XObject = pdfdictionary {
+                                    IM = pdfreference(ref)
+                                }
+                            },
+                ExtGState = pdfdictionary {
+                                GS = pdfdictionary {
+                                    Type = pdfconstant("ExtGState"),
+                                    CA   = pdfnumber(1),
+                                    ca   = pdfnumber(1)
+                                }
+                            },
+                ProcSet    = pdfarray { pdfconstant("PDF"), pdfconstant("ImageC") },
+            }
+            local pwd = pdf.immediateobj("stream",format("q /GS gs %s 0 0 %s 0 0 cm /IM Do Q",factor*width,factor*height),pw())
+            annot.AP = pdfdictionary { N = pdfreference(pwd) }
+        end
          return annot, figure, ref
      else
          activationdict.A = pdfconstant("PV")

Also I try to remind you AGAIN and AGAIN about pdfboolean problem in 
lpdf-ini.lua (old code is not OK if b is "false" and default is "true")

  local function pdfboolean(b,default)
-    if ((type(b) == "boolean") and b) or default then
-        return p_true
+    if type(b) ~= "boolean" then
+        if default then
+            return p_true
+        else
+            return p_false
+        end
      else
-        return p_false
+        if b then
+            return p_true
+        else
+            return p_false
+        end
      end
  end

        Sincerely, Michail

PS. And a great palliative way to deal with 3D annotations is via
attaching a 3D PDF file made with LaTeX (by Asymptote, for example).

But while your method of answering my messages in lua works OK for
new code (updating minimals and making a diff with old code is not
harder than checking e-mail inbox - "Your morning patch, sir!" ;),
I can not deduce from existing sea of ConTeXt code the status of file 
attachments support.

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--- lpdf-u3d.lua.org	2010-03-26 18:24:44.000000000 +0300
+++ lpdf-u3d.lua	2010-04-14 14:24:28.000000000 +0400
@@ -17,6 +17,7 @@
 local cos, sin, sqrt, pi, atan2, abs = math.cos, math.sin, math.sqrt, math.pi, math.atan2, math.abs
 
 local pdfconstant   = lpdf.constant
+local pdfnumber     = lpdf.number
 local pdfboolean    = lpdf.boolean
 local pdfunicode    = lpdf.unicode
 local pdfdictionary = lpdf.dictionary
@@ -62,8 +63,7 @@
 
 local function make3dview(view)
 
-    local name = viewname
-    local name = pdfunicode((view.name ~= "" and name) or "unknown view")
+    local name = pdfunicode((view.name ~= "" and view.name) or "unknown view")
 
     local viewdict = pdfdictionary {
        Type = pdfconstant("3DView"),
@@ -311,9 +311,6 @@
         for i=1,#nodes do
             local node = checkedkey(nodes,i,"table")
             if node then
-                local position = checkedkey(node,"position","table")
-                position = position and #position == 12 and pdfarray(position)
-                if position then
                     nodelist[#nodelist+1] = pdfdictionary {
                         Type = pdfconstant("3DNode"),
                         N    = node.name or ("node_" .. i), -- pdfunicode ?
@@ -325,13 +322,18 @@
                         },
                         M    = position,
                     }
+                local position = checkedkey(node,"position","table")
+                position = position and #position == 12 and pdfarray(position)
+                if position then
+                    nodelist[#nodelist].M = position
                 end
             end
       end
-      viewdict.NR = true
       viewdict.NA = nodelist
    end
 
+    viewdict.NR = true
+
    return viewdict
 
 end
@@ -349,19 +351,19 @@
 
     local activationdict = pdfdictionary {
        TB = pdfboolean(param.toolbar,true),
-       NP = pdfboolean(param.tree,true),
+       NP = pdfboolean(param.tree,false),
     }
 
     local stream = streams[label]
     if not stream then
 
-        local subtype, subdata = "U3D", io.readdata(foundname) or ""
+        local subtype, subdata = "U3D", file.readdata(foundname) or ""
         if find(subdata,"^PRC") then
-            subtype == "PRC"
+            subtype = "PRC"
         elseif find(subdata,"^U3D") then
-            subtype == "U3D"
+            subtype = "U3D"
         elseif file.extname(foundname) == "prc" then
-            subtype == "PRC"
+            subtype = "PRC"
         end
 
         local attr = pdfdictionary {
@@ -423,12 +425,35 @@
         local ref = stored_pr[tag]
         if not ref then
         --  weird, has to be a /Form and not an /Image so we need a wrap = true key
-        --  local figure = img.immediatewrite { filename = preview, width = width, height = height }
-            local figure = img.immediatewrite { stream = ".5 .75 .75 rg 0 0 20 10 re f", bbox = {0,0,20,10 } }
+            local figure = img.immediatewrite { filename = preview, width = width, height = height }
+        --  local figure = img.immediatewrite { stream = ".5 .75 .75 rg 0 0 20 10 re f", bbox = {0,0,20,10 } }
             ref = figure.objnum
             stored_pr[tag] = ref
         end
-        annot.AP = ref and pdfdictionary { N = pdfreference(ref) }
+        if ref then
+            local pw   = pdfdictionary {
+                Type      = pdfconstant("XObject"),
+                Subtype   = pdfconstant("Form"),
+                FormType  = pdfnumber(1),
+                BBox      = pdfarray { pdfnumber(0), pdfnumber(0), pdfnumber(factor*width), pdfnumber(factor*height) },
+                Matrix    = pdfarray { pdfnumber(1), pdfnumber(0), pdfnumber(0), pdfnumber(1), pdfnumber(0), pdfnumber(0) },
+                Resources = pdfdictionary {
+                                XObject = pdfdictionary {
+                                    IM = pdfreference(ref)
+                                }
+                            },
+                ExtGState = pdfdictionary {
+                                GS = pdfdictionary {
+                                    Type = pdfconstant("ExtGState"),
+                                    CA   = pdfnumber(1),
+                                    ca   = pdfnumber(1)
+                                }
+                            },
+                ProcSet    = pdfarray { pdfconstant("PDF"), pdfconstant("ImageC") },
+            }
+            local pwd = pdf.immediateobj("stream",format("q /GS gs %s 0 0 %s 0 0 cm /IM Do Q",factor*width,factor*height),pw())
+            annot.AP = pdfdictionary { N = pdfreference(pwd) }
+        end
         return annot, figure, ref
     else
         activationdict.A = pdfconstant("PV")

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--- lpdf-ini.lua.org	2010-04-07 19:51:31.000000000 +0400
+++ lpdf-ini.lua	2010-03-25 20:33:27.000000000 +0300
@@ -278,10 +280,18 @@
 end
 
 local function pdfboolean(b,default)
-    if ((type(b) == "boolean") and b) or default then
-        return p_true
+    if type(b) ~= "boolean" then
+        if default then
+            return p_true
+        else
+            return p_false
+        end
     else
-        return p_false
+        if b then
+            return p_true
+        else
+            return p_false
+        end
     end
 end
 

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________