Re: [NTG-context] new beta
On Sat, Jun 13, 2015 at 10:00 AM, Hans Hagen wrote:
Hi,
I uploaded a beta. The most significant (visible) change is in the way mp
handles outlines. Here are some examples:
% outlinetext (text) transformations ;
% outlinetext.d (text) (draw options) transformations ;
% outlinetext.f (text) (fill options) transformations ;
% outlinetext.b (text) (draw options) (fill options) transformations ;
% outlinetext.r (text) (fill options) (draw options) transformations ;
\starttext
\startMPpage
draw outlinetext.b
(\framed[align=normal]{\input{tufte}})
(withcolor .5white)
(withcolor red withpen pencircle scaled 1/10)
xsized 10cm ;
\stopMPpage
\startMPpage
draw outlinetext.r
(\framed[align=normal]{\input{tufte}})
(withcolor red withpen pencircle scaled 1/10)
(withcolor .5white)
xsized 10cm ;
\stopMPpage
\startMPpage
draw outlinetext.d
(\framed[align=normal]{\input{tufte}})
(withcolor .5white)
xsized 10cm ;
\stopMPpage
\startMPpage
picture p ; p := outlinetext.p(PX) ;
for i within p :
draw i withcolor red withpen pencircle scaled 1/10 ;
endfor ;
\stopMPpage
\stoptext
Amazing.
This also makes it easy to drop a shadow, a simplified version being
something like:
\starttext
\startbuffer
\framed[align=normal]{\bf\input{tufte}}
\stopbuffer
\startMPpage
draw outlinetext.b
(\getbuffer)
(withcolor .85white)
(withcolor .85white withpen pencircle scaled 1)
shifted (0.5,-0.5) ;
draw outlinetext.f
(\getbuffer)
(withcolor .7white)
shifted (0.5,-0.5) ;
draw outlinetext.b
(\getbuffer)
(withcolor yellow)
(withcolor black withpen pencircle scaled 1/10);
\stopMPpage
\stoptext
... but I believe one could now address this*** as well (with some
extra hacking of shadings):
http://tex.stackexchange.com/a/52823/6367
;) ;) ;)
The font previews are also amazing.
Mojca
*** Some time ago someone made me a poster on a colourful background
in Photoshop (background had both black and white elements). He used a
white font with black outline and gray dropped shadow. I reproduced
the content in ConTeXt, but I wasn't able to reproduce the nice shadow
that made the text stand out better and thus more readable. In the
printing house they asked me why I went from good to worse (ie. from
PhotoShop to TeX) by decreasing the visibility of letters. I assume
that doing smooth shadow behind the letters should finally be possible
in ConTeXt now as well. [Alan will probably disagree.]
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wiki : http://contextgarden.net
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Re: [NTG-context] TikZ and wrong drawing order
On Thu, Jun 11, 2015 at 11:26 PM, Hans Hagen wrote:
On Thu, 11 Jun 2015, Mojca Miklavec wrote:
Hi,
I would like to ask for help for either finding a fix or some clever
workaround for the following problem.
If I use a TikZ picture as item symbol and additionally use background
text, then the first symbol in itemize environment gets covered by the
background. Here's an example:
\usemodule
[tikz]
\definesymbol[1]
[{\tikz\shade[shading=ball,ball color=blue] (0,0) circle (.2cm);}]
\definecolor
[backcol]
[s=1,a=1,t=0.1]
\starttext
\startframedtext[width=4cm,background=color,backgroundcolor=backcol]
\startitemize
\item one
\item two
\item three
\stopitemize
\stopframedtext
\stoptext
i suppose that tikz puts some pdf code in the output stream and this is
likely to interfere with the way context deals with colors
a solution is:
{\red x\dontleavehmode\forcecolorhack\tikz\fill[color=blue] (0,0) circle
(.2cm);x}
the
\forcecolorhack
is, well, a hack that fools the optimizer and \dontleavehmode is needed to
get tex in the right mode
Thank you very much. Using the following worked fine as a workaround.
\definesymbol[1]
[{\dontleavehmode\forcecolorhack\tikz\shade[shading=ball,ball
color=blue] (0,0) circle (.2cm);}]
Meanwhile I filed a ticket to the pgf's bug tracker to help us
remember specifics about the problem.
Mojca
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Re: [NTG-context] TikZ and wrong drawing order
See also: http://tex.stackexchange.com/questions/54193/how-to-draw-a-shaded-sphere Mojca ___ 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: [NTG-context] TikZ and wrong drawing order
On Fri, Jun 12, 2015 at 12:45 AM, Hans Hagen wrote:
Most shades look ugly and useless to me anyway but you have more control
than you think (always had but nicer interfaced in mpiv):
\startMPpage
fill fullcircle scaled 10cm
withshademethod circular
withshadevector (5cm,1cm)
withshadecenter (.1,.5)
withshadedomain (.2,.6)
withshadefactor 1.2
withshadecolors (red,green)
;
\stopMPage
Great, I love the new syntax (compared to the MKII ugliness of shadings).
But how does one declare more than one colour? In particular, how
would you do the following in MP?
\usemodule
[tikz]
\pgfdeclareverticalshading{rainbow}{100bp}{
color(0bp)=(red);
color(25bp)=(red);
color(35bp)=(yellow);
color(45bp)=(green);
color(55bp)=(cyan);
color(65bp)=(blue);
color(75bp)=(violet);
color(100bp)=(violet)}
\starttext
\starttikzpicture[shading=rainbow]
\shade[shading angle=90] (0,0) rectangle +(10,1);
\stoptikzpicture
\stoptext
Of course you need to play with the values as there is no 'best'
combination.
This is how TikZ defines the ball:
\pgfdeclareradialshading[tikz@ball]{ball}{\pgfqpoint{-10bp}{10bp}}{%
color(0bp)=(tikz@ball!15!white);
color(9bp)=(tikz@ball!75!white);
color(18bp)=(tikz@ball!70!black);
color(25bp)=(tikz@ball!50!black);
color(50bp)=(black)}
Your example uses just two colours, while TikZ uses five and I don't
know how to translate this ball shading to MP (I know or at least
knew how to do it in plain PostScript and could dig it up; I think it
uses function shading with predefined colours at predefined distances,
but it's all a single shading (a single function), not a composition
of multiple sections).
Mojca
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