Draw ARC between 2 lines

[Emster]

Hi,

I wonder if anyone has some ideas on how I can draw an ARC between two lines to show the angle between them. (example is attached).

So far, I have used LineTo etc to draw the lines. I know the start and endpoints of both lines and have calculated each angle and the angle between them using standard trig functions. I can calculate the midpoint of the arc I wish to draw, but I am not sure how to proceed.

I have tried the CDC::Arc function but I am not sure how to work out the bounding rectangle of the Arc. I have also tried the AngleArc function but I don't want the extra line to be displayed. Would it be better to draw the arc myself or am I just using the functions incorrectly? (my math is a bit rusty)

Let me know what code I should post to recieve some help with this problem.

thanks,
Emelia

[Emster]

Trying attachment again

[Doctor Luz]

If you don't want to use math you may do the following.

Define a new clipping area wich will be the triangle that the two lines define (with the end points an the intersection point).

Draw a circle with center in the intersection point.

Restore the original clipping area.

[Emster]

Thanks Doctor Luz. That was a simple solution that worked really well.

Problem solved,
Emelia