Spinning a movie clip on center axis? (and more)

[Oli-G]

Hey fellas,

I have a movie clip on the stage, which is a record.

What I want, is for the user to be able to move the mouse over, click down, and spin the record left and right. To confuse matters, I would like to keep the record spinning (tapering to a stop) after they let go and flick the cursor across the screen. So if they hold the mouse down, the record will rotate with the mouse. and perhaps some lag which will be easy enough.

Anyone know how to do this? I also need to set a maximum velocity (?), whereby when it is spun hard enough, an event is triggered.

I guess the most essential thing is to be able to rotate the object, with tapering etc being secondary. I'm told it uses fairly simple pythagoras etc, but i'm yet to even use a simple rotate command.

My teacher did send a good detailed example, but I had a fair bit of difficulty making heads or tails given that there were rotation limits imposed, etc

Any ideas? cheers

[Navarone]

I am not sure I know how to do everything your asking, but here is some rotation code I used, it might get you started. I used a movie clip with the instance name of "cd".

cd.onEnterFrame = function (){
    this._rotation -=30; //sets the rotation of the movie clip
    //trace(this._x);
    // this moves the movie clip 25 pixels to the left
    //if(this._x>100) {
        //this._x-=50
    //} 
}

[Oli-G]

Hey dude,

Thanks for the reply. I threw the code in though and the record was spinnin all over the place! At least it was movin tho eh .

Basically I need it to act kinda similar to say, a volume knob, on a synth, in regards to how the user can interact with it. The other stuff will be seperate, I guess.

[Oli-G]

Well, the general consensus on other forums is that this is gonna be a bit over my head, so i'm changing it.

What I now would like is, when the record is just clicked, to spin by itself, and gradually increase until it hits a top speed, where an event is triggered.

Any ideas?

cheers!

[Navarone]

Try this and let me know what your think. You can adjust the rotation speed by increasing the rotation value or slow it down as the case may be.

[pungkerton]

Maybe something like this:

onClipEvent( enterFrame ){
    if( rotateSpeed == ( undefined || null ) ){
        _global.rotateSpeed = 1;
    } else {
        if( rotateSpeed < 30 ){
            _global.rotateSpeed++;
        }
    }
    this._rotation = this._rotation + rotateSpeed;
}

30 is the maxspeed.
the increment to speed up is 1; for more, change _global.rotateSpeed++; to _global.rotateSpeed = _global.rotateSpeed + n;.
I dropped this onto the movieclip rather than the frame.

[pungkerton]

Here's what I came up with...

[Oli-G]

Great work guys, very much appreciated.