November 18, 2020

FMX Line Angle Demo


A simple demo showing how to create a GUI with FMX to let the user draw two intersecting lines and then compute and show the angle between the two lines.

The use has to click on 3 points: the point where the lines intersect, the point where the first line (red) ends and the point where the second line (green) ends.

The user interface is updated in real-time following mouse movements.

 Full source code can be found there: