[texworks] Problem with TW viewer : asymptote and layers

[Paul A Norman]

Dear Arthur,

If you are looking for layers in the TeXworks previewer then I do not
believe that you will currently find them in any release of TeXworks.

The previewer is based on Poppler a different engine to the acrobat
reader pdf viewer.

There has been talk on the list here about seeing if layers can be
activated in the TeXworks previewer, but at present the feature is not
available to r759

Here is a link to a previous discussion on the topic.

http://tug.org/mailman/mmsearch/texworks?config=texworks&restrict=&exclude=&method=and&format=long&sort=score&words=layers

Paul

On 20 June 2011 10:02,  <site4000 at free.fr> wrote:
> Hello,
>
> I use Windows Seven 64 bits, TL2010 up to date with TLContrib and run
> TeXworks 0.4.0 (r.759).
>
> I got the following Asymptote code here :
> http://asymptote.sourceforge.net/gallery/spectrum.asy
>
> Here it is :
>
> import graph;
> usepackage("ocg");
> settings.tex="pdflatex";
>
> // Dan Bruton algorithm
> pen nm2rgb(real wl, real gamma=0.8, bool intensity=true) {
>  triple rgb;
>  if(wl>= 380&&  wl<= 440) {rgb=((440-wl)/60,0,1);}
>  if(wl>   440&&  wl<= 490) {rgb=(0,(wl-440)/50,1);}
>  if(wl>   490&&  wl<= 510) {rgb=(0,1,(510-wl)/20);}
>  if(wl>   510&&  wl<= 580) {rgb=((wl-510)/70,1,0);}
>  if(wl>   580&&  wl<= 645) {rgb=(1,(645-wl)/65,0);}
>  if(wl>   645&&  wl<= 780) {rgb=(1,0,0);}
>
>  real Intensity=1;
>  if(intensity) {
>    if(wl>= 700) {Intensity=0.3+0.7*(780-wl)/80;}
>    else if(wl<= 420) {Intensity=0.3+0.7*(wl-380)/40;}
>  }
>
>  return rgb((Intensity*rgb.x)**gamma,(Intensity*rgb.y)**gamma,
>             (Intensity*rgb.z)**gamma);
> }
>
> real width=1;
> real height=50;
>
> begin("spectrum");
> for(real i=380 ; i<= 780 ; i += width) {
>  draw((i,0)--(i,height),width+nm2rgb(wl=i,false)+squarecap);
> }
> begin("Extinction",false); // nested
> for(real i=380 ; i<= 780 ; i += width) {
>  draw((i,0)--(i,height),width+nm2rgb(wl=i,true)+squarecap);
> }
> end();
> end();
>
> begin("Wavelength");
> xaxis(scale(0.5)*"$\lambda$(nm)",BottomTop,380,780,
>      RightTicks(scale(0.5)*rotate(90)*Label(),step=2,Step=10),above=true);
> end();
>
> // From Astronomical Data Center(NASA)
> // Neutral only
> real[] Na={423.899, 424.208, 427.364, 427.679, 428.784, 429.101,
>           432.14, 432.462, 434.149, 434.474, 439.003, 439.334, 441.989,
> 442.325,
>           449.418, 449.766, 454.163, 454.519, 568.2633, 568.8204, 588.995,
>           589.5924};
> begin("Na absorption");
> for(int i=0; i<  Na.length; ++i) {
>  draw((Na[i],0)--(Na[i],height),0.1*width+squarecap);
> }
> end();
>
> begin("Na emission");
> for(int i=0; i<  Na.length; ++i) {
>  draw((Na[i],0)--(Na[i],-height),0.1*width+nm2rgb(Na[i],false)+squarecap);
> }
> end();
>
> // Neutral only
> real[] Zn={388.334, 396.543, 411.321, 429.288, 429.833, 462.981,
>           468.014, 472.215, 481.053 , 506.866, 506.958, 518.198, 530.865,
>           531.024, 531.102, 577.21, 577.55, 577.711, 623.79, 623.917,
> 636.234,
>           647.918, 692.832, 693.847, 694.32, 779.936};
> begin("Zn absorption",false);
> for(int i=0; i<  Zn.length; ++i) {
>  draw((Zn[i],0)--(Zn[i],height),width+squarecap);
> }
> end();
>
> begin("Zn emission",false);
> for(int i=0; i<  Zn.length; ++i) {
>  draw((Zn[i],0)--(Zn[i],-height),width+nm2rgb(Zn[i],false)+squarecap);
> }
> end();
>
> shipout(bbox(2mm,Fill(white)));
>
>
>
>
> (When you compile this code with asymptote, it produces a pdf file with 7
> layers)
>
> Then I tried to use the Asymptote code above in the latex following document
> :
>
>
>
>
>
> \documentclass{article}
>
> \usepackage[utf8]{inputenc}
>
> \usepackage[T1]{fontenc}
>
> \usepackage{asymptote}
>
> %\usepackage{ocg}
>
> \begin{document}
>
> \begin{asy}
>
> import graph;
>
> usepackage("ocg");
>
> settings.tex="pdflatex";
>
> // Dan Bruton algorithm
>
> pen nm2rgb(real wl, real gamma=0.8, bool intensity=true) {
>
> triple rgb;
>
> if(wl >= 380 && wl <= 440) {rgb=((440-wl)/60,0,1);}
>
> if(wl > 440 && wl <= 490) {rgb=(0,(wl-440)/50,1);}
>
> if(wl > 490 && wl <= 510) {rgb=(0,1,(510-wl)/20);}
>
> if(wl > 510 && wl <= 580) {rgb=((wl-510)/70,1,0);}
>
> if(wl > 580 && wl <= 645) {rgb=(1,(645-wl)/65,0);}
>
> if(wl > 645 && wl <= 780) {rgb=(1,0,0);}
>
> real Intensity=1;
>
> if(intensity) {
>
> if(wl >= 700) {Intensity=0.3+0.7*(780-wl)/80;}
>
> else if(wl <= 420) {Intensity=0.3+0.7*(wl-380)/40;}
>
> }
>
> return rgb((Intensity*rgb.x)**gamma,(Intensity*rgb.y)**gamma,
>
> (Intensity*rgb.z)**gamma);
>
> }
>
> real width=1;
>
> real height=50;
>
> begin("spectrum");
>
> for(real i=380 ; i <= 780 ; i += width) {
>
> draw((i,0)--(i,height),width+nm2rgb(wl=i,false)+squarecap);
>
> }
>
> begin("Extinction",false); // nested
>
> for(real i=380 ; i <= 780 ; i += width) {
>
> draw((i,0)--(i,height),width+nm2rgb(wl=i,true)+squarecap);
>
> }
>
> end();
>
> end();
>
> begin("Wavelength");
>
> xaxis(scale(0.5)*"$\lambda$(nm)",BottomTop,380,780,
>
> RightTicks(scale(0.5)*rotate(90)*Label(),step=2,Step=10),above=true);
>
> end();
>
> // From Astronomical Data Center(NASA)
>
> // Neutral only
>
> real[] Na={423.899, 424.208, 427.364, 427.679, 428.784, 429.101,
>
> 432.14, 432.462, 434.149, 434.474, 439.003, 439.334, 441.989, 442.325,
>
> 449.418, 449.766, 454.163, 454.519, 568.2633, 568.8204, 588.995,
>
> 589.5924};
>
> begin("Na absorption");
>
> for(int i=0; i < Na.length; ++i) {
>
> draw((Na[i],0)--(Na[i],height),0.1*width+squarecap);
>
> }
>
> end();
>
> begin("Na emission");
>
> for(int i=0; i < Na.length; ++i) {
>
> draw((Na[i],0)--(Na[i],-height),0.1*width+nm2rgb(Na[i],false)+squarecap);
>
> }
>
> end();
>
> // Neutral only
>
> real[] Zn={388.334, 396.543, 411.321, 429.288, 429.833, 462.981,
>
> 468.014, 472.215, 481.053 , 506.866, 506.958, 518.198, 530.865,
>
> 531.024, 531.102, 577.21, 577.55, 577.711, 623.79, 623.917, 636.234,
>
> 647.918, 692.832, 693.847, 694.32, 779.936};
>
> begin("Zn absorption",false);
>
> for(int i=0; i < Zn.length; ++i) {
>
> draw((Zn[i],0)--(Zn[i],height),width+squarecap);
>
> }
>
> end();
>
> begin("Zn emission",false);
>
> for(int i=0; i < Zn.length; ++i) {
>
> draw((Zn[i],0)--(Zn[i],-height),width+nm2rgb(Zn[i],false)+squarecap);
>
> }
>
> end();
>
> shipout(bbox(2mm,Fill(white)));
>
> \end{asy}
>
> \end{document}
>
>
>
> When I compile this code with pdflatex (pdflatex+asy+pdflatex), there's non
> problem (I fact there is a problem because there is no more layers but that
> another problem and it doesn't come from TeXworks) but if you uncomment the
> fifth line (%\usepackage{ocg})
> and then compile again with pdflatex (pdflatex+asy+pdflatex), everything
> disappear. However, if you read the pdf with acrobat, there's no problem
> with it.
>
>
> Arthur
>
>
>
>
>