If the person is at position px,py and the mouse is at position mx,my then the angle a is calculated from

float angle = degrees(atan2(my-py, mx-px));
angle = (angle < 0) : angle + 360 : angle;
angle = 360 - angle;

This will give the angle 'a' in degrees -  a = 0 when level increasing in anticlockwise direction round person..

Get a syntax error.Same if I replay the " : " with " / " .

greetz

hey florian,

replace the first ':' with a '?'

so:
angle = (angle < 0) ? angle + 360 : angle;

cheers,

Rolf

He's forgotten the ? in the angle < 0 while using the condition operator. 

float px = 200, py = 400;
float mx = 500, my = 300;

float ang = degrees( atan2(my - py, mx - px) );
ang = ang < 0 ? ang + 360 : ang;
ang = 360 - ang;

println(ang);

exit();

Thanks,works perfect now :)

float ang = degrees( atan2(mouseY - draw_pos_y+12, mouseX - draw_pos_x+8) );
ang = ang < 0 ? ang + 360 : ang;
ang = 360 - ang;

greetz

Sorry about the typo - glad it now works