Filling a form having different line styles with a pattern

Question

I want to make a small technical drawing in tikz. Cuts in technical drawings are shown with a handwritten line which is realized with the "pencildraw" (derived from another question here). The rest should be straight lines. Because it is a cut, the pattern "north east lines" should fill the whole form.

I added a minimal example here:

\documentclass{standalone}

\usepackage{tikz}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{positioning}
\usetikzlibrary{decorations.pathreplacing}
\usetikzlibrary{patterns}

\begin{document}

\begin{tikzpicture}[   
pencildraw/.style={
decorate,
decoration={random steps,segment length=4pt, amplitude=0.8pt}
},
line cap= round
]

\draw[pencildraw,pattern = north east lines] (0,0) --(2,0)(0,2) --(2,2);

\draw[pattern = north east lines] (0,0) to (0,2)(2,0) to (2,2);

\fill[pattern = north east lines] (0,0) rectangle (2,2);

\end{tikzpicture}

\end{document}

With this approach, the north west lines draw over the handwritten line. Also, the boundaries are not one continuous line, which makes the ends look terrible in cases.

Answer 1

You need to create the enclosing path in one go then it can clip the pattern lines properly.

\documentclass[tikz]{standalone}
\usetikzlibrary{decorations.pathmorphing,positioning,decorations.pathreplacing,patterns}
\begin{document}
\begin{tikzpicture}[pencildraw/.style={
     decoration={random steps,segment length=4pt, amplitude=0.8pt}}]

\draw[pattern = north east lines]  decorate[pencildraw]{(0,0) --(2,0)} --(2,2) 
                                                 decorate[pencildraw]{--(0,2)} --cycle;

\end{tikzpicture}
\end{document}