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The arrowhead function adds a small arrow marker to the end of a line. It looks like this:
arrowhead function
arrowhead(ctx, a, b, length=4)
| Parameter | Type | Description |
|---|---|---|
| ctx | Context | The Pycairo Context to draw to |
| a | (number, number) | Tuple (x, y) for point a |
| b | (number, number) | Tuple (x, y) for point b |
| length | number | length of the tick in user units. |
Draws an arrowhead on the line ab. The arrow point is at b and points in the direction a to b.
Example
See the example in the angle_marker article.
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