Difference between revisions of "Asymptote: Drawing"
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<tt> | <tt> | ||
dot((0,0)); | dot((0,0)); | ||
+ | </tt> | ||
+ | |||
+ | You can fix certain attributes to this dot, such as color: | ||
+ | |||
+ | <tt> | ||
+ | dot((0,0),blue); | ||
</tt> | </tt> | ||
<asy> | <asy> | ||
− | dot((0,0)); | + | dot((0,0),blue); |
</asy> | </asy> | ||
− | + | To make the dot an open dot, you could draw a really small circle with a white fill and black outline: | |
+ | |||
+ | <tt> | ||
+ | filldraw(circle((0, 0), 0.02), white, black); | ||
+ | </tt> | ||
+ | |||
+ | For example: | ||
+ | |||
+ | <asy> | ||
+ | draw((0, 0) -- (0, 1), EndArrow(10)); | ||
+ | label("$(0, 1)$", (0, 1), NW); | ||
+ | draw((0, 0) -- (1, 0), EndArrow(10)); | ||
+ | label("$(1, 0)$", (1, 0), SE); | ||
+ | draw((0, 0) --(1, 1), blue); | ||
+ | label("$x = y$", (0, 0) -- (1, 1), SE, blue); | ||
+ | filldraw(circle((0, 0), 0.02), white, black); | ||
+ | </asy> | ||
+ | |||
+ | Or you could do this craziness: | ||
<tt> | <tt> | ||
− | dot((0,0), | + | dot((0,0),filltype=FillDraw(fillpen=white, drawpen=black)); |
</tt> | </tt> | ||
+ | |||
+ | For example: | ||
<asy> | <asy> | ||
− | dot((0,0), | + | draw((0,1)..(0,0)..(1,0), Arrows(10)); |
+ | dot((0,0),filltype=FillDraw(fillpen=white, drawpen=black)); | ||
</asy> | </asy> | ||
Line 60: | Line 87: | ||
<tt>draw(ellipse((0,0),5,3));</tt> | <tt>draw(ellipse((0,0),5,3));</tt> | ||
− | In this case, the (0,0) is the center of the ellipse, the 5 is the length of the major axis and the 3 is the length of the minor axis. This results in: | + | In this case, the (0,0) is the center of the ellipse, the 5 is the length of the semi-major axis and the 3 is the length of the semi-minor axis. This results in: |
<asy> | <asy> | ||
Line 67: | Line 94: | ||
Once again, we can fix attributes and fill the inside. | Once again, we can fix attributes and fill the inside. | ||
+ | |||
+ | <tt>filldraw(ellipse((0,0),5,3),green,red+linewidth(1));</tt> | ||
<asy> | <asy> | ||
filldraw(ellipse((0,0),5,3),green,red+linewidth(1)); | filldraw(ellipse((0,0),5,3),green,red+linewidth(1)); | ||
+ | </asy> | ||
+ | |||
+ | ==Unit- Paths== | ||
+ | |||
+ | There are several useful pre defined paths for drawing things like unit squares, unit circles, etc. Just use the unit- paths! | ||
+ | |||
+ | You can use the | ||
+ | |||
+ | <tt>unitsquare</tt> | ||
+ | <tt>unitcircle</tt> | ||
+ | |||
+ | paths for 2D. A list of Unit- paths for 3D can be found in the "Definitions": section of [[Asymptote: 3D graphics]] | ||
+ | |||
+ | Here is the <tt>unitsquare</tt> command: | ||
+ | |||
+ | <tt>draw(unitsquare);</tt> yields | ||
+ | <asy> | ||
+ | draw(unitsquare); | ||
+ | </asy> | ||
+ | |||
+ | And the <tt>unitsphere</tt> command.(Note: you have to import the three module for this to work.) | ||
+ | |||
+ | <tt>import three; | ||
+ | draw(unitsphere,pink);</tt> | ||
+ | yields | ||
+ | <asy>import three; | ||
+ | draw(unitsphere,pink);</asy> | ||
+ | |||
+ | Since the unit- variables are paths, you can assign pen, fill them, and define other paths as them: | ||
+ | |||
+ | |||
+ | <tt>path u=unitcircle;</tt> | ||
+ | <tt>pen p=red+dashed;</tt> | ||
+ | <tt>draw(u,p);</tt> | ||
+ | |||
+ | yields | ||
+ | |||
+ | <asy> | ||
+ | path u=unitcircle; | ||
+ | pen p=red+dashed; | ||
+ | draw(u,p); | ||
</asy> | </asy> |
Latest revision as of 09:04, 4 August 2024
Contents
[hide]Dots
Let us start off with the most basic of this basic command: drawing a dot.
To draw a dot, simply write the following code:
dot((0,0));
You can fix certain attributes to this dot, such as color:
dot((0,0),blue);
To make the dot an open dot, you could draw a really small circle with a white fill and black outline:
filldraw(circle((0, 0), 0.02), white, black);
For example:
Or you could do this craziness:
dot((0,0),filltype=FillDraw(fillpen=white, drawpen=black));
For example:
Circles
In this article, draw(circle((0,0),5));
We see that the first draw() command creates the circle, which uses the circle() command. How this works is that the circle() command produces a path in which the draw() command draws. Within the circle command, we see the center point is located at the cartesian plane point (0,0), and it has a radius of 5.
This code produces:
Once again, we can fix certain attributes to this code:
draw(circle((0,0),5),red+linewidth(1));
And we can fill the inside:
filldraw(circle((0,0),5),green,red+linewidth(1));
Ellipse
Another rounded figure we can create is the ellipse.
draw(ellipse((0,0),5,3));
In this case, the (0,0) is the center of the ellipse, the 5 is the length of the semi-major axis and the 3 is the length of the semi-minor axis. This results in:
Once again, we can fix attributes and fill the inside.
filldraw(ellipse((0,0),5,3),green,red+linewidth(1));
Unit- Paths
There are several useful pre defined paths for drawing things like unit squares, unit circles, etc. Just use the unit- paths!
You can use the
unitsquare unitcircle
paths for 2D. A list of Unit- paths for 3D can be found in the "Definitions": section of Asymptote: 3D graphics
Here is the unitsquare command:
draw(unitsquare); yields
And the unitsphere command.(Note: you have to import the three module for this to work.)
import three; draw(unitsphere,pink); yields
Since the unit- variables are paths, you can assign pen, fill them, and define other paths as them:
path u=unitcircle; pen p=red+dashed; draw(u,p);
yields