[Tex/LaTex] How to pimp the tube

pgf-decorationsshadingtikz-pgf

How can I pimp my tube?

enter image description here

\documentclass{scrartcl}
% needs logicpuzzle bundle v1.8
% http://mirrors.ctan.org/graphics/pgf/contrib/logicpuzzle/logicpuzzle.sty
% or replace logicpuzzle -> battleship
\usepackage{logicpuzzle}
\makeatletter
\definecolor{LPlgrey}{rgb}{.8,.8,.8}
\definecolor{LPtgrey}{rgb}{.7,.7,.7}
\definecolor{LPgrey}{rgb}{.5,.5,.5}
\def\myscale{.7}
\newcommand*\LPtunnel%
{%
  \begin{tikzpicture}[scale=\myscale]
    \fill[color=black] (0,0) -- (0,1) -- (.4,.5) -- (.4,0) -- cycle;
    \fill[color=LPgrey] (0,1) -- (1,1) -- (1,.5) -- (.4,.5) -- cycle;
    \fill[color=LPlgrey] (.40,0) rectangle (1,.5);
  \end{tikzpicture}
}%
\newcommand*\tunnel[2]{\LP@setcellcontent{#1}{#2}{\LPtunnel}}
\newcommand*\tube[3]%
{%
  \def\tubepath{%
  (#1.5,#2.5)
  \foreach \dir in {#3}%
  {%
    \ifnum\dir=2%
    --++(0,-1)%
    \fi%
    \ifnum\dir=4%
    --++(-1,0)%
    \fi%
    \ifnum\dir=6%
    --++(1,0)%
    \fi%
    \ifnum\dir=8%
    --++(0,1)%
    \fi%
  };}%
  \begin{puzzlebackground}
    \pgfsetcornersarced{\pgfpoint{3mm}{3mm}}
    \draw[color=LPtgrey, line width=.4cm*\myscale] \tubepath;%
  \end{puzzlebackground}
}%
\makeatother
\begin{document}
  \begin{logicpuzzle}[scale=\myscale]
    \tunnel{1}{1}
    \tunnel{5}{5}
    \tube{1}{1}{6,6,6,6,8,8,8,4,2,4,4,4,8,8,6,6,6,6}
  \end{logicpuzzle}
\end{document}

Can I add a decoration like in this picture?

I know I can add a shading (kind of 3D effect) to a rectangle. But it is also possible for such a complex path with a shading based on the angle?

Another important point: It must survive scaling.

Best Answer

Something like that ?

\documentclass{standalone}
% needs logicpuzzle bundle v1.8
% http://mirrors.ctan.org/graphics/pgf/contrib/logicpuzzle/logicpuzzle.sty
% or replace logicpuzzle -> battleship
\usepackage{logicpuzzle}
\makeatletter
\definecolor{LPlgrey}{rgb}{.8,.8,.8}
\definecolor{LPtgrey}{rgb}{.7,.7,.7}
\definecolor{LPgrey}{rgb}{.5,.5,.5}
\def\myscale{.7}
\newcommand*\LPtunnel%
{%
  \begin{tikzpicture}[scale=\myscale]
    \fill[color=black] (0,0) -- (0,1) -- (.4,.5) -- (.4,0) -- cycle;
    \fill[color=LPgrey] (0,1) -- (1,1) -- (1,.5) -- (.4,.5) -- cycle;
    \fill[color=LPlgrey] (.40,0) rectangle (1,.5);
  \end{tikzpicture}
}%
\newcommand*\tunnel[2]{\LP@setcellcontent{#1}{#2}{\LPtunnel}}
\newcommand*\tube[3]%
{%
  \def\tubepath{%
  (#1.5,#2.5)
  \foreach \dir in {#3}%
  {%
    \ifnum\dir=2%
    --++(0,-1)%
    \fi%
    \ifnum\dir=4%
    --++(-1,0)%
    \fi%
    \ifnum\dir=6%
    --++(1,0)%
    \fi%
    \ifnum\dir=8%
    --++(0,1)%
    \fi%
  };}%
  \begin{puzzlebackground}
    \pgfsetcornersarced{\pgfpoint{3mm}{3mm}}
    \draw[color=LPtgrey!80!black, line width=.4cm*\myscale] \tubepath;%
    \draw[color=LPtgrey, line width=.38cm*\myscale] \tubepath;%
    \draw[color=LPtgrey!85, line width=.35cm*\myscale] \tubepath;%
    \draw[color=LPtgrey!70, line width=.32cm*\myscale] \tubepath;%
    \draw[color=LPtgrey!55, line width=.29cm*\myscale] \tubepath;%
    \draw[color=LPtgrey!45, line width=.25cm*\myscale] \tubepath;%
    \draw[color=LPtgrey!35, line width=.2cm*\myscale] \tubepath;%
  \end{puzzlebackground}
}%
\makeatother
\begin{document}
  \begin{tikzpicture}[scale=\myscale]
    \path[draw] (1,1) grid (6,6);
    \tunnel{1}{1}
    \tunnel{5}{5}
    \tube{1}{1}{6,6,6,6,8,8,8,4,2,4,4,4,8,8,6,6,6,6}
  \end{tikzpicture}
\end{document}

enter image description here

Related Solutions

[Tex/LaTex] TikZ: Cropping the Bounding Box

The code adds some completely useless invisible (or rather white) stuff. The lines

\clip(0pt,403pt) -- (389.957pt,403pt) -- (389.957pt,99.6166pt) -- (0pt,99.6166pt) -- (0pt,403pt);
\color[rgb]{1,1,1}
\fill(3.76406pt,399.236pt) -- (380.923pt,399.236pt) -- (380.923pt,253.19pt) -- (3.76406pt,253.19pt) -- (3.76406pt,399.236pt);
\fill(53.4497pt,394.719pt) -- (374.901pt,394.719pt) -- (374.901pt,289.325pt) -- (53.4497pt,289.325pt) -- (53.4497pt,394.719pt);

draw a white background that is larger than the actual picture. TikZ sees that and thinks it is part of the picture. Simply removing/uncommenting these lines removes most of the whitespace.

Near the end of the first scope,

\color[rgb]{1,1,1}
\fill(3.76406pt,249.426pt) -- (386.193pt,249.426pt) -- (386.193pt,103.381pt) -- (3.76406pt,103.381pt) -- (3.76406pt,249.426pt);

does the same. Additionally (near the end of the second scope),

\pgftext[center, base, at={\pgfpoint{220.95pt}{106.392pt}}]{\sffamily\fontsize{9}{0}\selectfont{\textbf{ }}}

adds a blank node below the picture, again enlarging the bounding box.

Removing all those lines gives a tight bounding box.

As far as I know, TikZ cannot do the cropping for you, as it can't know whether the white stuff is intentional or not (there might for example be a dark background behind the image so that white is visible).

[Tex/LaTex] TikZ circuits: symbol for gas discharge tube

Two things are required to get Lionel's node to work like the other circuit components: You need to declare the symbol using circuit declare symbol=<name>, set <name> graphic={shape=<shape name>, draw, transform shape,...}, and you need to construct the shape around the local origin.

Here's one way of doing this (note that I used the circle ee shape as the basis for the new symbol, because it already defines the input and output anchors.

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{circuits, shapes.gates.ee}

\begin{document}

\makeatletter
\pgfdeclareshape{neon lamp shape}
{
    \inheritsavedanchors[from=circle ee]
    \inheritanchor[from=circle ee]{center}
    \inheritanchor[from=circle ee]{north}
    \inheritanchor[from=circle ee]{south}
    \inheritanchor[from=circle ee]{east}
    \inheritanchor[from=circle ee]{west}
    \inheritanchor[from=circle ee]{north east}
    \inheritanchor[from=circle ee]{north west}
    \inheritanchor[from=circle ee]{south east}
    \inheritanchor[from=circle ee]{south west}
    \inheritanchor[from=circle ee]{input}
    \inheritanchor[from=circle ee]{output}
    \inheritanchorborder[from=circle ee]

    \backgroundpath{
        \pgf@process{\radius}
        \pgfutil@tempdima=\radius

        \pgfpathcircle{\centerpoint}{\pgfutil@tempdima}

        \pgfpathmoveto{\pgfpoint{-\pgfutil@tempdima}{0pt}}
        \pgfpathlineto{\pgfpoint{-0.2\pgfutil@tempdima}{0pt}}
        \pgfpathmoveto{\pgfpoint{-0.2\pgfutil@tempdima}{0.7\pgfutil@tempdima}}
        \pgfpathlineto{\pgfpoint{-0.2\pgfutil@tempdima}{-0.7\pgfutil@tempdima}}

        \pgfpathmoveto{\pgfpoint{\pgfutil@tempdima}{0pt}}
        \pgfpathlineto{\pgfpoint{0.2\pgfutil@tempdima}{0pt}}
        \pgfpathmoveto{\pgfpoint{0.2\pgfutil@tempdima}{0.7\pgfutil@tempdima}}
        \pgfpathlineto{\pgfpoint{0.2\pgfutil@tempdima}{-0.7\pgfutil@tempdima}}
        \pgfusepath{stroke}

        \pgfpathcircle{\pgfqpoint{-0.4\pgfutil@tempdima}{-0.55\pgfutil@tempdima}}{.075\pgfutil@tempdima}
        \pgfusepath{fill}
    }
}
\makeatother


\begin{tikzpicture}[
circuit,
circuit declare symbol=neon lamp,
set neon lamp graphic={shape=neon lamp shape, draw, minimum size=1cm,transform shape}
]
\draw (0,0) to [neon lamp] (2,1);
\end{tikzpicture}

\end{document}

Best Answer

Related Solutions

[Tex/LaTex] TikZ: Cropping the Bounding Box

[Tex/LaTex] TikZ circuits: symbol for gas discharge tube

Related Question