Added presentation

presentation/lib/numberLine.tex

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+\RequirePackage{environ}
+
+% ### DEFINE NumberLine ENVIRONMENT ###
+% define numberLine/area parameters
+\pgfkeys{/numberLine/area/.is family, /numberLine/area,
+	height/.estore in = \numberLineAreaHeight,
+	color/.estore in = \numberLineAreaColor,
+	opacity/.estore in = \numberLineAreaOpacity,
+	label/.store in = \numberLineAreaLabel,
+	textcolor/.store in = \numberLineAreaTextcolor,
+	textabove/.store in = \numberLineAreaTextPosition
+}
+\pgfkeys{/numberLine/area, default/.style = {height=0.2, color=orange, opacity=1, label=, textcolor=black, textabove=0.2ex}}
+
+% define numberLine/area parameters
+\pgfkeys{/numberLine/point/.is family, /numberLine/point,
+	size/.estore in = \numberLinePointSize,
+	color/.estore in = \numberLinePointColor,
+	textcolor/.store in = \numberLinePointTextcolor,
+	textabove/.store in = \numberLinePointTextPosition
+}
+\pgfkeys{/numberLine/point, default/.style = {size=0.1, color=orange, textcolor=black, textabove=0.3ex}}
+
+% define environment
+\NewEnviron{numberLine}[3][]{	
+	% Draw an xtick at (1: x-position, 2: label to display)
+	\newcommand{\xtick}[2]{
+		\draw (##1,0.1) -- + (0,-0.2) node[below] {$##2$}
+	}
+	% Draw an area on the number-line (1: from x, 2: to x, 3: color)
+	\newcommand{\area}[3][]{
+		\pgfkeys{/numberLine/area, default, ##1}
+		\begin{pgfonlayer}{areas}
+			\fill [\numberLineAreaColor,fill opacity=\numberLineAreaOpacity] (##2,-0.1) rectangle (##3,{-0.1 + \numberLineAreaHeight})
+				node[pos=.5,yshift=\numberLineAreaTextPosition,label={[\numberLineAreaTextcolor]\numberLineAreaLabel}] {};
+		\end{pgfonlayer}
+	}
+	% Draw a point on the number-line (1: x-position, 2: color, 3: size)
+	\newcommand{\point}[3][]{
+		\pgfkeys{/numberLine/point, default, ##1}
+		\begin{pgfonlayer}{points}
+			\fill[\numberLinePointColor] (##2,0) circle (\numberLinePointSize)
+				node[above=\numberLinePointTextPosition,text=\numberLinePointTextcolor] {##3};
+		\end{pgfonlayer}
+	}
+
+
+	\pgfdeclarelayer{areas}
+	\pgfdeclarelayer{points}
+	\pgfsetlayers{areas,main,points}
+
+	\begin{tikzpicture}[#1]
+		\BODY
+		
+		%draw horizontal line above everything else (except the x-ticks)
+		\draw (#2,0) -- (#3,0);
+		%draw xticks above everything else
+		\foreach \x in {#2,...,#3}
+			\xtick{\x}{\x};
+	\end{tikzpicture}
+}