about calculate angle question thanks

[melnet]

Hi

x = _xmouse;
y = _ymouse*-1;
angle = Math.atan(y/x)/(Math.PI/180);

the following is flash as. but in game factory, it has no Math.atan

any other method to calculate?i have looked for it in long time.....
my math concept is poor......

thanks....

[Brandon]

Atan(Y("ObjectName")/X("ObjectName"))/(3.1415926/180)

And the 3.1415926 comes up by pressing the Pi button in the expression editor.

[melnet]

HI

i have re-coded. but it doesn't work.
in the new condition, i add "always".
then i set angle to ATan((YMouse*-1)/XMouse)/(3.141592654/180)
on a arrow pic.
when running the program, the arrow pic can't rotation according to mouse moving

thanks for help

[xyzzy]

MMF2/TGF2's trig functions take degrees so you shouldn't need the pi/180 part

[melnet]

@@
i dont understand what u said...

u mean to use Multimedia Fusion 2?

[stAtrill]

He means that the the 'ATan()' function already returns a degree value, so there is no reason to convert it from radians.

Also, the clickteam movement controller can do this for you, if I remember correctly:
General Expressions -> Angle between two points

Feed in the first object's coordinates, then the second object's, and it will return the angle in degrees.