[cairo] Drawing an arrow

[Travis Griggs]

On Nov 24, 2010, at 1:50 AM, donn wrote:

> On 23/11/2010 19:09, Stefan Salewski wrote:
>> Can you imagine building an arrow of 3 or more line segments?
> The OP is a question I would like to see answered too. The problem  
> is how to find the three points to define the arrow. If you have a  
> bezier-curve, so the line is some S shape, how do you get the arrow  
> to point along the direction that the curve sort of ends in?

One trick I use, for arrows that I know are never going to be huge, is  
rather than figure out the triangle, i just draw a small wedge whose  
center is at the end point of the line. The start and end angles are  
something like +/- 15 from the angle of the line.

--
Travis Griggs
Objologist
For every adage, there is an equal and contrary un-adage