1.  Biffer des éléments avec cancel

\usepackage{amsmath}
\usepackage{cancel}
\begin{align*}
 2x+3y-(3y-x) &= 6 \\
 2x+\cancel{3y}-\cancel{3y}+x &=6 \\
 3x &= 6 \\
 x &= 2
\end{align*}

2.  Utiliser la transparence

Remarque : Compilation latex + conversion PS + conversion PDF nécessaire.

\usepackage{pstricks-add}
\makeatletter
\def\psset@transpalpha#1{\pst@checknum{#1}\pstranspalpha}
\psset@transpalpha{1}

\def\psfs@transp{%
  \addto@pscode{/Normal .setblendmode \pstranspalpha .setshapealpha}
  \psfs@solid
  }
\makeatother
\begin{pspicture}(-5,-5)(5,5)
  \psset{linestyle=none,fillstyle=transp}
  \pscircle[fillcolor=green,transpalpha=0.7](2;135){2cm}
  \pscircle[fillcolor=red,transpalpha=0.3](2;45){2cm}
  \pscircle[fillcolor=blue,transpalpha=0.5](1;-90){2cm}
\end{pspicture}

A tester :

\usepackage{pstricks-add}% 2.79 or higher
\begin{pspicture}(-5,-5)(5,5)
  \psset{linestyle=none,fillstyle=transparent}
  \pscircle[fillcolor=green,transpalpha=0.7](2;135){2cm}
  \pscircle[fillcolor=red,transpalpha=0.3](2;45){2cm}
  \pscircle[fillcolor=blue,transpalpha=0.5](1;-90){2cm}
\end{pspicture}

\end{document}

3.  Physique-chimie avec ‘extension pst-labo

L’extension pst-labo permet de dessiner le matériel de chimie : http://mirrors.ircam.fr/pub/CTAN/graphics/pstricks/contrib/pst-labo/

\psset{unit=0.3cm,glassType=ballon,becBunsen}
\pstChauffageTube[tubeSeul=true]
\pstChauffageTube[barbotage]
\endpspicture

\psset{unit=0.5cm,glassType=erlen}
\pspicture(7,8)
\rput(3,0){
\pstChauffageBallon[doubletube,recuperationGaz,
 substance=\pstClouFer]
}
\endpspicture
\endpspicture

\psset{unit=0.5cm,glassType=becher,
burette=false}
\pstDosage[phmetre]
\endpspicture

4.  TODO

  • multicols - color - …
  • reprendre les chapitres précédents pour colorer les usepackage