PGF基本图形对象

documentclass{article}
usepackage[active ,tightpage ,xetex ]{ preview}
usepackage{tikz}

egin{document}
egin{preview}
egin{tikzpicture}
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%1 直线和矩形
draw (0,0) --(4,0) --(2,2) --(0,0);
draw (5,0) --(9,0) --(7,2)--cycle;
draw [rounded corners] (10 ,0) --(14,0) --(12,2)--cycle;
draw (15 ,0) rectangle (19 ,2);
draw [rounded corners] (20 ,0) rectangle (24 ,2);
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%2 圆、椭圆、弧
draw (1,-3) circle (1);
draw (5,-3) ellipse (2 and 1);
draw (10 ,-3) arc (0:270:1);
draw (15 ,-3) arc (0:270:2 and 1);
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%3 曲线
draw (0,-6).. controls (2,-4) and (4,-4) ..(4 ,-6);
filldraw (0,-6) circle (.1)
(2,-6) circle (.1)
(4,-4) circle (.1)
(4,-6) circle (.1);
draw (5,-5) parabola bend (6,-6) (7.414 ,-4);
filldraw (5,-5) circle (.1)
(6,-6) circle (.1)
(7.414 ,-6) circle (.1);
draw (8,-6) sin (10 ,-4) cos (12 ,-6);
filldraw (8,-6) circle (.1)
(10 ,-4) circle (.1)
(12 ,-6) circle (.1);
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%4 网格
draw [step=5pt] (0,-9) grid (3,-7);
draw [help lines ,step=5pt] (4,-9) grid (7,-7);
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end{tikzpicture}
end{preview}
end{document}