% A Christmas tree % Decorations by Andrew Stacey % Based on a fractal tree (L-System) drawn in TikZ by Stefan Kottwitz % Tree example from the book "The Science of fractal images" by Peitgen and Saupe. \documentclass { article } \usepackage { tikz } \usetikzlibrary { % lindenmayersystems, decorations.pathmorphing, decorations.markings, shapes.geometric, calc % } \tikzset { tinsel/.style= { #1, rounded corners=10mm, ultra thin, decorate, decoration= { snake, amplitude=.1mm, segment length=10, } } , baubles/.style= { decorate, decoration= { markings, mark=between positions .3 and 1 step 2cm with { \pgfmathsetmacro { \brad }{ 2 + .5 * rand } \path [shading=ball,ball color=#1] (0,0) circle[radius= \brad mm]; } } } , lights/.style= { decorate, decoration= { markings, mark=between positions 0 and 1 step 1cm with { \pgfmathparse { rand > 0 ? "dart" : "kite" } \let\lshape\pgfmathresult \pgfmathsetmacro { \tint }{ 100*rnd }

ode [rotate=90,\lshape,shading=ball,inner sep=1pt,ball color=red!\tint!yellow] {} ; } } } } \begin { document } \begin { tikzpicture } \coordinate (star) at (0,-1); \path (star) +(-50:7) coordinate (rhs) +(-130:7) coordinate (lhs); \draw [brown!50!black,line width=5mm,line cap=round] (star) ++(-90:6.8) -- ++(0,-1) coordinate (base);

ode [scale=-1,trapezium,fill=black,minimum size=1cm] at (base) {} ; \foreach \height / \colour in { % .2/blue, .4/yellow, .6/red, .8/orange, 1/pink % } { \draw [tinsel=\colour] ( $ ( star )! \height !( lhs ) $ ) to[bend right] ( $ ( star )! \height !( rhs ) $ ); } \path (star); \pgfgetlastxy { \starx }{ \stary } \begin { scope } [xshift= \starx ,yshift= \stary ,yshift=-7cm] \draw [color=green!50!black, l-system={rule set={S -> [+++G][---G] TS, G -> +H[-G]L, H -> -G[+H]L, T -> TL, L -> [-FFF][+FFF]F } , step=4pt, angle=18, axiom=+++++SLFFF, order=11 } ] lindenmayer system -- cycle; \end { scope } \foreach \height / \colour in { % .1/pink, .3/red, .5/yellow, .7/blue, .9/orange % } { \draw [tinsel=\colour] ( $ ( star )! \height !( lhs ) $ ) to[bend right] ( $ ( star )! \height !( rhs ) $ ); } \foreach \height in { .15,.35,...,1 } { \draw [lights] ( $ ( star )! \height !( lhs ) $ ) to[bend right] ( $ ( star )! \height !( rhs ) $ ); } \foreach \angle / \colour in { -50/red, -70/yellow, -90/blue, -110/pink, -130/purple % } { \draw [baubles=\colour] (star) -- ++( \angle :7); }

ode [star,star point ratio=2.5,fill=yellow,minimum size=1cm] at (star) {} ; \end { tikzpicture } \end { document }