line with arrows?

[vschiavoni]

Hello
i guess this is kind of a basic question, but i'm really a newbie. How do I attach an arrow to one or both the endings of a line? I guess I need to draw a triangle, but do I need to calculate by hand the coordinates, or is there
around some predefined function that I can add, by specifying the width of the arrow and how log it's supposed to be?

thanks,
valerio

[Robin]

or is there
around some predefined function that I can add, by specifying the width of the arrow and how log it's supposed to be?

Nope, but I can give you a hint on what you need to do:
math.atan2(y, x), math.cos(a) and math.sin(a).

[Robin]

I decided to write four arrow implementations, just for the heck of it. Four variants are (open, close) x (one end, two end). I'm sure you can make them much more advanced, for example by using setLineWidth or setLineStyle between draws, but this is the basic idea.

[vschiavoni]

thanks!