New in Wolfram Mathematica 7: New Graphics Primitives  previous | next 
Control the Shapes of Line Joins and Line Caps.
Use the JoinForm and CapForm directives to control the shapes of line joins and endcaps.
In[1]:=

Click for copyable input
unit={{0,0},{0,3},{3,3},{3,1},{2,1},{2,2},{1,2},{1,0},{4,0}};

meander=Line[Join[unit,(#+{4,0})& /@ unit,(#+{8,0})& /@ unit]];

	

Graphics[{Thickness[.04],Darker[Magenta,.6],

	JoinForm["Round"],CapForm["Round"],meander,

	JoinForm["Miter"],CapForm["Square"],Translate[meander,{0,5}],

	JoinForm["Bevel"],CapForm["Butt"],Translate[meander,{0,10}]

	},PlotRangePadding->.3]
Out[1]=