add grid to images

1 files changed, 9 insertions, 0 deletions

diff --git a/buch/chapters/110-elliptisch/images/ellpolnul.tex b/buch/chapters/110-elliptisch/images/ellpolnul.tex
index 16730f9..fe1d235 100644
--- a/buch/chapters/110-elliptisch/images/ellpolnul.tex
+++ b/buch/chapters/110-elliptisch/images/ellpolnul.tex
@@ -15,6 +15,15 @@
 \def\skala{1}
 \begin{tikzpicture}[>=latex,thick,scale=\skala]
 
+\input rechteckpfade3.tex
+
+\pgfmathparse{1/\xmax}
+\xdef\dx{\pgfmathresult}
+\xdef\dy{\dx}
+
+\netz{0.1pt}
+\draw[line width=0.1pt] (-1,0) -- (1,0);
+\fill[color=white,opacity=0.5] (-1,-1) rectangle (1,1);
 \draw (-1,-1) rectangle (1,1);
 \node at (-1,-1) [below left] {$0$};
 \node at (1,-1) [below right] {$K$};