Problem above is resolved for the moment!
It was just that we must use a Grafic Pen with tilt inclinaison and not a simple mouse!
So the orientation will follow the painting! flow!
It surely possible to code the same for the mouse ;°
Something perpendicular to the painting move path

It's after painting with the mouse, and before painting for the grafic pen !
But its' the same effect for the eyes
Else funny!

