From 3a7e2cef27bd78a96b20751db2a53f7291fcd2a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20M=C3=BCller?= <andreas.mueller@ost.ch>
Date: Fri, 24 Jun 2022 20:18:48 +0200
Subject: add grid to images

---
 buch/chapters/110-elliptisch/images/ellselection.tex | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'buch/chapters/110-elliptisch/images/ellselection.tex')

diff --git a/buch/chapters/110-elliptisch/images/ellselection.tex b/buch/chapters/110-elliptisch/images/ellselection.tex
index 9e822ec..0dd1e04 100644
--- a/buch/chapters/110-elliptisch/images/ellselection.tex
+++ b/buch/chapters/110-elliptisch/images/ellselection.tex
@@ -14,15 +14,22 @@
 \def\skala{1}
 \begin{tikzpicture}[>=latex,thick,scale=\skala]
 
+\input{rechteckpfade2.tex}
+
 \def\l{0.45}
 \pgfmathparse{\l*72/2.54}
 \xdef\L{\pgfmathresult}
 
+\pgfmathparse{4.1/\xmax}
+\xdef\dx{\pgfmathresult}
+\xdef\dy{\dx}
+
 \def\sx{4.1}
 \pgfmathparse{\sx*72/2.54}
 \xdef\Sx{\pgfmathresult}
 
-\def\sy{3.2}
+\pgfmathparse{\dx*\ymax}
+\xdef\sy{\pgfmathresult}
 \pgfmathparse{\sy*72/2.54}
 \xdef\Sy{\pgfmathresult}
 
@@ -36,8 +43,10 @@
 \pgfmathparse{\sy/2}
 \xdef\rechtsy{\pgfmathresult}
 
-\fill[color=red!20] ({-\sx},0) rectangle (\sx,\sy);
-\fill[color=blue!20] ({-\sx},{-\sy}) rectangle (\sx,0);
+\hintergrund
+\netz{0.7pt}
+\fill[color=red!14,opacity=0.7] ({-\sx},0) rectangle (\sx,\sy);
+\fill[color=blue!14,opacity=0.7] ({-\sx},{-\sy}) rectangle (\sx,0);
 \fill[color=yellow!40,opacity=0.5] (0,0) rectangle (\sx,\sy);
 
 \draw (-\sx,-\sy) rectangle (\sx,\sy);
-- 
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