[Tex/LaTex] Tikz scale vs pgf scale

tikz-pgf

The following code shows that the tikz "scale" is different from pgf?

Changing the scale values for x and y in the tikzset command will scale the tikz rectangle but not the pgf star. Any ideas how to reconcile this? I need to be able to to scale my tikz pictures easily but have pgf use the same scale and origin.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes.callouts,shapes.geometric}
\begin{document}
\tikzset{x=0.1in,y=0.1in}
\begin{tikzpicture}
\draw[top color= black!50] (-2,-2) rectangle (5,4);

\begin{scope}
\pgfset{minimum width=1.5cm,minimum height=1.5cm}
\pgftransformshift{\pgfpoint{2cm}{2cm}}
\pgfnode{star}{center}{}{}{\pgfusepath{clip}}
\pgftransformreset
% Back to drawing
\fill[yellow] (2cm,2cm) circle (0.65cm);
\end{scope}
\end{tikzpicture}
\end{document}

Best Answer

The main difficulty is that the scale and transform shape keys belong to /tikz/ family and does not penetrate down to PGF level. Instead they are mapped with rather tedious mechanisms. Hence, we need to somewhat fake it with low level transformation commands. If for some reasons we still need to use [x=0.1in,y=0.1in] we have to add the corresponding \pgfsetxvec and \pgfsetyvec commands appropriately to mimic the TikZ effect.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}

\begin{document}
\begin{tikzpicture}[scale=.75]
\pgfgettransform{\somemacro}
\draw[top color= black!50] (-2cm,-2cm) rectangle (5cm,4cm);
\draw[style=help lines] (-2cm,-2cm) grid[step=1cm] (5cm,4cm);
\node (o) at (0,0) {0};


\begin{scope}
\pgfset{minimum width=1.5cm,minimum height=1.5cm}
\pgftransformshift{\pgfpoint{3cm}{0cm}}
\pgfnode{star}{center}{}{}{\pgfusepath{clip}}
\pgfsettransform{\somemacro}
\fill[yellow] (3cm,0cm) circle (0.65cm);
\end{scope}

\node[draw,circle,transform shape] (dum) at (2,2) {(2,2)};

\begin{scope}
\pgfset{minimum width=2cm,minimum height=2cm}
\pgftransformshift{\pgfpoint{0cm}{2.5cm}}
\pgfnode{star}{center}{}{}{\pgfusepath{clip}}
\pgfsettransform{\somemacro}
\fill[red] (0cm,2.5cm) circle (0.8cm);
\end{scope}

\end{tikzpicture}
\end{document}

enter image description here

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] Numerical conditional within tikz keys

I am definitely unfamiliar with both beamer and tikz (do not quite get what the \only are supposed to do) but perhaps this could go in the direction you want:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{chains}
\newcounter{count}

% helper macro:
\long\def\GobToSemiColon #1;{}

\newcommand\myPicture{
\begin{tikzpicture}
  \begin{scope}[start chain = going below]
  \ifnum\value{count}<1 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>3 \expandafter\GobToSemiColon\fi
  \node[draw, rectangle, on chain] {display only when counter is between
    1 and 3};

  \ifnum\value{count}>-1 \expandafter\GobToSemiColon\fi
  \node[draw, rectangle, on chain] {display only when counter is
    negative}; 

  \ifnum\value{count}<100 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>200 \expandafter\GobToSemiColon\fi  
  \node[draw, rectangle, on chain] {display only if counter is between
    100 and 200};

  \ifnum\value{count}<3 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>20 \expandafter\GobToSemiColon\fi
  \node[draw, circle, on chain] {only when counter is in the range 3 to 20};
  \end{scope}
\end{tikzpicture}
}

\begin{document}
\begin{frame}
\only{\setcounter{count}{-3}\myPicture}
\only{\setcounter{count}{105}\myPicture}
\only{\setcounter{count}{39}\myPicture}
\only{\setcounter{count}{2}\myPicture}
\only{\setcounter{count}{5}\myPicture}
\end{frame}
\end{document}

beamer

Best Answer

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

[Tex/LaTex] Numerical conditional within tikz keys

Related Question