Dragging a clock's hand... Math question

[Christian_Wheel]

Here's the project...

I have a sound file that's exactly 60 minutes long. I need to create a clock, with a minute hand, that moves in accordance with the sound's playback. That part's easy.

If the user clicks-and-drags the minute hand, it should seek to the appropriate time in the sound file.

I'm having a heck of a time with the math calculations. My minute hand is an Active Object that has its Action Point on one end, and I can set the Angle of the object as necessary.

However, when the user clicks on it, I need to calculate the relative angle from the Action Point of the minute hand to the mouse pointer.

I have tried the Advanced Direction Object, but I can't see any of the options I'd need. Unless I'm missing it....

The other catch is it has to work in Flash. So I'm limited to the objects that are built into the flash runtime.

Any suggestions? Thanks in advance!

[Jacob]

atan2(y2-y1,x1-x2)will give you the angle between two points. This assumes that by default the object faces right.

atan2(Y("Hand"),ymouse,xmouse-X("Hand"))

[Christian_Wheel]

Thanks! It works... Kinda. It seems to be moving in the inverse direction when I click and drag, but on the bottom half of the clock things get all weird. Will keep experimenting.

Edit: Had the formula in incorrectly. Now that it's as listed above, here are my results. What's wrong?

http://bit.ly/9F621l

[Christian_Wheel]

Got it. Had to multiply the result by -1.