added interstection examples

tikz/intersecting-lines-2/Makefile

@@ -0,0 +1,31 @@
+SOURCE = intersecting-lines-2
+DELAY = 80
+DENSITY = 300
+WIDTH = 500
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg

tikz/intersecting-lines-2/intersecting-lines-2.tex

@@ -0,0 +1,40 @@
+\documentclass{article}
+\usepackage[pdftex,active,tightpage]{preview}
+\setlength\PreviewBorder{0mm}
+
+\usepackage{tkz-fct}
+\usetikzlibrary{arrows, decorations.pathreplacing}
+\usetikzlibrary{shapes.misc}
+
+\tikzset{
+    line/.style={
+        very thick,
+        black,
+        to path={% works only with "to" and not "--"
+            -- (\tikztotarget) node[at start,point] {} node [at end,point] {} \tikztonodes
+        }
+    },
+    point/.style={
+        ultra thick,
+        draw=gray,
+        cross out,
+        inner sep=0pt,
+        minimum width=4pt,
+        minimum height=4pt,
+    },
+}
+
+\begin{document}
+\begin{preview}
+\begin{tikzpicture}
+       \draw[white,fill=white] (-0.5,-0.5) rectangle (5.2,5.2); % background
+       \tkzInit [xmin=0,xmax=4.5,ymin=0,ymax=4.5]
+        \begin{scriptsize}
+            \tkzGrid[color = gray!30!white]
+            \tkzAxeXY
+        \end{scriptsize}
+        \draw[line,red] (1,1) to (4,4);
+        \draw[line,blue] (2,2) to (3,3);
+\end{tikzpicture}
+\end{preview}
+\end{document}