Arc
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The ARC command draws a partial section of an ellipse (or circle).
| Arg | Type | Description | Values |
|---|---|---|---|
| center | [pair!] | The center of the circle | |
| radius | [pair!] | The radius of the circle | |
| angle-begin | [decimal!] | The angle where the arc begins, in degrees | |
| angle-length | [decimal!] | The length of the arc in degrees | |
| closed | [word!] | Optional, must be the word closed | closed - close the arc |
For angle-begin, 0° is to right of the center point, on the horizontal axis.
Arcs are drawn in a clockwise direction from the angle-begin point.
Simple open arcs, beginning at 0°.
arc 200x25 100x100 0 90 arc 200x125 100x100 0 135 arc 200x250 100x100 0 180 |
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Simple open arcs, beginning at different angles, but all with the same length.
arc 200x25 100x100 0 120 arc 200x125 100x100 45 120 arc 200x250 100x100 90 120 |
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Closed Arcs
A closed arc. The arcs is closed by drawing lines to the center point of the circle that defines the arc.
arc 100x100 100x100 0 90 closed |
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fill-pen red arc 100x100 90x90 135 180 fill-pen green arc 300x100 90x90 225 180 fill-pen blue arc 100x300 90x90 45 180 fill-pen yellow arc 300x300 90x90 315 180 |
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fill-pen red arc 150x250 90x90 0 180 fill-pen green arc 150x150 90x90 90 180 fill-pen blue arc 250x150 90x90 180 180 fill-pen yellow arc 250x250 90x90 270 180 |
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Closed arcs are an easy way to draw wedges for pie charts.
fill-pen red arc 200x200 90x90 0 90 closed fill-pen green arc 200x200 90x90 90 90 closed fill-pen blue arc 200x200 90x90 180 90 closed fill-pen yellow arc 200x200 90x90 270 90 closed |
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By changing the center point, you can draw exploded pie charts.
pen white line-width 2 fill-pen red arc 204x204 150x150 0 90 closed fill-pen green arc 196x204 150x150 90 30 closed fill-pen blue arc 180x190 150x150 120 150 closed fill-pen yellow arc 204x196 150x150 270 90 closed |
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