View source for Asymptote: Useful commands and their Output

{{Asymptote}}

For each of the following, we have put a blue dot at the origin in order to indicate relative location of the output on the coordinate plane.  In other words, assume that before each of the examples below is the command 
 <tt>dot((0,0),blue);</tt>
In addition, a comment after a line such as <tt>//math - extension</tt> indicates that the command (in this case <tt>extension</tt>) used in that line is defined in the <tt>math</tt> package, thus motivating the <tt>import math;</tt> (or other appropriate package) line at the top of the example.

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'''Example 1:'''
 dot((20,0));
'''Output 1:'''
[[Image:Figure2.gif]]

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'''Example 2:'''
 draw((0,0)--(50,0),BeginArrow);
 draw((0,-10)--(50,-10),MidArrow);
 draw((0,-30)--(50,-30),Arrows);
'''Output 2:'''
[[Image:Figure3.gif]]

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'''Example 3:'''
 draw((0,0)--(50,0));
 arrow((30,0),dir(180),green);
'''Output 3:'''
[[Image:Figure4.gif]]

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'''Example 4:'''
 import math;
 pair A,B,C,D,E;
 A=(0,0); C=(50,0); B=(10,10); D=(40,20);
 E=extension(A,B,C,D);  // math - extension
 // extension(A,B,C,D) returns the intersection of lines AB and CD
 draw(A--B); draw(C--D);
 draw(B--E--D,orange);
 
'''Output 4:'''
[[Image:Figure5.gif]]

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'''Example 5:'''
 import graph;
 draw(Circle((0,0),20)); // graph - Circle
'''Output 5:'''
[[Image:Figure6.gif]]
 
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'''Example 6:'''
 path p=(0,0)..(20,15)..(40,-5)..(50,0);
 draw(p);
 draw(rotate(90)*p,green);
 draw(rotate(180,(-5,0))*p,orange);
 draw(shift((5,20))*p,magenta);
 draw(shift((0,-25))*yscale(1.4)*p,red);

'''Output 6:'''
[[Image:Figure7.gif]]

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'''Example 7:'''
 import olympiad;
 pair A,B,C,O,I;
 A=origin; B=2*right; C=1.5*dir(70);
 O=circumcenter(A,B,C); // olympiad - circumcenter
 I=incenter(A,B,C); // olympiad - incenter
 draw(A--B--C--cycle);
 dot(O);
 dot(I);
 draw(circumcircle(A,B,C)); // olympiad - circumcircle
 draw(incircle(A,B,C)); // olympiad - incircle
 label("<math>I</math>",I,W);
 label("<math>O</math>",O,S);

'''Output 7:'''
[[Image:Figure8.gif]]

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'''Example 8:'''
 import three;
 unitsize(1inch);
 currentprojection=orthographic(1/2,-1,1/2); // three - currentprojection, orthographic
 draw((0,0,0)--(1,0,0)--(1,1,0)--(0,1,0)--cycle3,red); //three - cycle3
 draw((0,0,0)--(0,0,1));
 draw((0,1,0)--(0,1,1));
 draw((1,1,0)--(1,1,1));
 draw((1,0,0)--(1,0,1));
 draw((0,0,1)--(1,0,1)--(1,1,1)--(0,1,1)--cycle3,green);

'''Output 8:'''
[[Image:Figure9.gif]]

== See Also ==
[http://piprim.tuxfamily.org/asymptote/  Many more Asymptote examples]