Circle diagram made with tkz-euclide renders differently in TeX Live 2018 versus TeX Live 2020

Question

I have another question similar to my last question about 2018 -> 2020 tkz-euclide compatibility changes.

I have a circle diagram that compiles and renders perfectly in Overleaf (TeX Live 2018):

Here is the code that compiles successfully:

\documentclass[addpoints]{exam}
\printanswers
\usepackage{gensymb} %for degree symbol
\usepackage{pgf,tikz}
\usetikzlibrary{angles,arrows.meta,automata,backgrounds,calc,decorations.markings,decorations.pathreplacing,intersections,patterns,positioning,quotes}
\usetikzlibrary{shapes} %For polygon nodes, see http://www.texample.net/tikz/examples/node-shapes/
\usepgflibrary{shapes.geometric}
%Needed to resolve conflict between tkz-euclide and thmtools, see https://tex.stackexchange.com/questions/456029/thmtools-and-tkz-euclide-conflict
\usepackage{tkz-euclide}
\usetkzobj{all}
%\usepackage{thmtools}
\usepackage{etoolbox}
\makeatletter
%%% patch tkz-tools-base.tex
\let\tkz@g@xa\tkz@init@xmin % don't undef @xa or thmtools will be upset
\let\tkz@g@xb\tkz@init@xmax\undef@xb
\let\tkz@g@ya\tkz@init@ymin\undef@ya
\let\tkz@g@yb\tkz@init@ymax\undef@yb
\patchcmd{\tkz@Init}
 {\global\let@xa\tkz@init@xmin
  \global\let@xb\tkz@init@xmax
  \global\let@ya\tkz@init@ymin
  \global\let@yb\tkz@init@ymax}
 {\global\let\tkz@g@xa\tkz@init@xmin
  \global\let\tkz@g@xb\tkz@init@xmax
  \global\let\tkz@g@ya\tkz@init@ymin
  \global\let\tkz@g@yb\tkz@init@ymax}
 {}{}
\patchcmd{\tkz@Grid}
 {(@xa,@ya)(@xb,@yb)}
 {(\tkz@g@xa,\tkz@g@ya)(\tkz@g@xb,\tkz@g@yb)}
 {}{}
\makeatother
\newtheorem{thm}{Theorem}
\title{MWE}
\begin{document}
\begin{questions}
\question
\begin{parts}
\part Find:
%from https://latex.org/forum/viewtopic.php?t=23290
\begin{center}
\begin{tikzpicture}
\tkzDefPointlabel=above:O{O}
\tkzDefPointlabel=below left:A{A}
\tkzDefPointlabel=below right:B{B}
\tkzDefPointlabel=above:C{C}
\tkzDrawPointsfill=black,size=10
\tkzDrawCircle(O,A)
\tkzDrawPolygon(C,A,O,B)
\tkzMarkAnglesize=0.75
\tkzLabelAnglepos=0.5,font=\small{80\degree}
\tkzMarkAnglesize=0.75
\tkzLabelAnglepos=0.5,font=\small{$\alpha$}
\end{tikzpicture}
\end{center}
\vspace*{\stretch{1}}
\part Evaluate the unknown arc and angle measures.
\begin{center}
\begin{tikzpicture}[scale=2] %from https://latex.org/forum/viewtopic.php?t=21949
\tkzDefPoint (0,0){O}
\tkzDefPoint (2,0){P}
\tkzDefPoint (1,0){C}
\tkzLabelPointleft{$O$}
\tkzLabelPointright{$P$}
\tkzLabelPointright{$C$}
\tkzDrawCircleR
\tkzTangentfrom with R=P \tkzGetPoints{T1}{T2}
\tkzDrawLines[add=0 and 0](O,T1 O,T2 O,P)
\tkzDrawLines[add=0 and 0.5](P,T1 P,T2)
\tkzLabelPointabove{$A$}
\tkzLabelPointbelow{$B$}
\tkzDrawArcR with nodes,(T1,T2)
%\draw (T1) node[above right] {$P(\alpha)=(a,\cos\alpha,a,\sin\alpha)$};
%\draw (T2) node[below right] {$Q(\alpha)=(a,\cos\beta,a,\sin\beta)$};
\draw (P) +(165:0.6) node {$25\degree$};
%\draw (P) +(195:0.6) node {$25\degree$};
\tkzLabelSegmentabove right{$6$ cm}
\end{tikzpicture}
\end{center}
\vspace*{\stretch{1}}
\end{parts}
\end{questions}
\end{document}

However if you change the TeX Live distribution from 2018 to 2020, it renders differently and Overleaf spits some errors:

I learned from this thread that \usetkzobj{all} shouldn't be used with recent tkz-euclide. Commenting this line in the 2020 distribution fixes some but not all issues.

Some (undesired changes):

In 1st diagram, geometric points are very large
In 1st diagram, angles have a "tick mark" in them
In 2nd diagram, tangent lines to circle disappeared

Any ideas how to fix these issues? Thank you!

score 2 · Accepted Answer · answered Nov 15 '20 at 07:30

First of all \usetkzobj{all} should be removed, in the new version it gives an error. (Sorry, didn't see you had mentioned that, but it wasn't commented out in the code.)

Second, \tkzTangent should be \tkzDefTangent

That fixes the errors. For the undesired changes:

if the dots are too large, just change the size in \tkzDrawPoints[fill=black,size=10](O,A,B,C), e.g. size=5.
Default behaviour of \tkzMarkAngle
See \tkzDefTangent above.

Complete code:

\documentclass[addpoints]{exam}
\printanswers
\usepackage{gensymb} %for degree symbol
\usepackage{pgf,tikz}
\usetikzlibrary{angles,arrows.meta,automata,backgrounds,calc,decorations.markings,decorations.pathreplacing,intersections,patterns,positioning,quotes}
\usetikzlibrary{shapes} %For polygon nodes, see http://www.texample.net/tikz/examples/node-shapes/
\usepgflibrary{shapes.geometric}
%Needed to resolve conflict between tkz-euclide and thmtools, see https://tex.stackexchange.com/questions/456029/thmtools-and-tkz-euclide-conflict
\usepackage{tkz-euclide}
\tikzset{/tkzmkangle/mark=none}  % https://tex.stackexchange.com/a/544732
%\usetkzobj{all} % <-- don't use this with the new version
%\usepackage{thmtools}
\usepackage{etoolbox}
\makeatletter
%%% patch tkz-tools-base.tex
\let\tkz@g@xa\tkz@init@xmin % don't undef @xa or thmtools will be upset
\let\tkz@g@xb\tkz@init@xmax\undef@xb
\let\tkz@g@ya\tkz@init@ymin\undef@ya
\let\tkz@g@yb\tkz@init@ymax\undef@yb
\patchcmd{\tkz@Init}
 {\global\let@xa\tkz@init@xmin
  \global\let@xb\tkz@init@xmax
  \global\let@ya\tkz@init@ymin
  \global\let@yb\tkz@init@ymax}
 {\global\let\tkz@g@xa\tkz@init@xmin
  \global\let\tkz@g@xb\tkz@init@xmax
  \global\let\tkz@g@ya\tkz@init@ymin
  \global\let\tkz@g@yb\tkz@init@ymax}
 {}{}
\patchcmd{\tkz@Grid}
 {(@xa,@ya)(@xb,@yb)}
 {(\tkz@g@xa,\tkz@g@ya)(\tkz@g@xb,\tkz@g@yb)}
 {}{}
\makeatother
\newtheorem{thm}{Theorem}
\title{MWE}
\begin{document}
\begin{questions}
\question
\begin{parts}
\part Find:
%from https://latex.org/forum/viewtopic.php?t=23290
\begin{center}
\begin{tikzpicture}
\tkzDefPointlabel=above:O{O}
\tkzDefPointlabel=below left:A{A}
\tkzDefPointlabel=below right:B{B}
\tkzDefPointlabel=above:C{C}
\tkzDrawPointsfill=black,size=5
\tkzDrawCircle(O,A)
\tkzDrawPolygon(C,A,O,B)
\tkzMarkAnglesize=0.75
\tkzLabelAnglepos=0.5,font=\small{80\degree}
\tkzMarkAnglesize=0.75
\tkzLabelAnglepos=0.5,font=\small{$\alpha$}
\end{tikzpicture}
\end{center}
\vspace*{\stretch{1}}
\part Evaluate the unknown arc and angle measures.
\begin{center}
\begin{tikzpicture}[scale=2] %from https://latex.org/forum/viewtopic.php?t=21949
\tkzDefPoint (0,0){O}
\tkzDefPoint (2,0){P}
\tkzDefPoint (1,0){C}
\tkzLabelPointleft{$O$}
\tkzLabelPointright{$P$}
\tkzLabelPointright{$C$}
\tkzDrawCircleR
\tkzDefTangentfrom with R=P \tkzGetPoints{T1}{T2}
\tkzDrawLines[add=0 and 0](O,T1 O,T2 O,P)
\tkzDrawLines[add=0 and 0.5](P,T1 P,T2)
\tkzLabelPointabove{$A$}
\tkzLabelPointbelow{$B$}
\tkzDrawArcR with nodes,(T1,T2)
%\draw (T1) node[above right] {$P(\alpha)=(a,\cos\alpha,a,\sin\alpha)$};
%\draw (T2) node[below right] {$Q(\alpha)=(a,\cos\beta,a,\sin\beta)$};
\draw (P) +(165:0.6) node {$25\degree$};
%\draw (P) +(195:0.6) node {$25\degree$};
\tkzLabelSegmentabove right{$6$ cm}
\end{tikzpicture}
\end{center}
\vspace*{\stretch{1}}
\end{parts}
\end{questions}
\end{document}

Thank you! You solved all my issues :) – EthanAlvaree Nov 16 '20 at 01:35 — EthanAlvaree, Nov 16 '20 at 01:35

Circle diagram made with tkz-euclide renders differently in TeX Live 2018 versus TeX Live 2020

1 Answers1