# Point rotation problems

**URL:** <https://forum.kirupa.com/t/point-rotation-problems/119984>\
**Category:** Uncategorized\
**Created:** [August 19, 2004, 5:51pm UTC](https://forum.kirupa.com/t/point-rotation-problems/119984 "2004-08-19T17:51:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jerez\_z](https://avatars.discourse-cdn.com/v4/letter/j/bc79bd/32.png) [@jerez\_z](https://forum.kirupa.com/u/jerez_z)\
**Post date:** [August 19, 2004, 5:51pm UTC](https://forum.kirupa.com/t/point-rotation-problems/119984/1 "2004-08-19T17:51:21Z")

</div>

I designed this script to take two points (ie x and y), convert those to an angle rotate it so many degrees and then change the points accordingly. I put together a little test and it does not seem to function as planned. It rotates somewhat, but then begins to click back and forth. Here is my code:

```auto

point = new Array(100, 50);
offset = new Array(Stage.width/2, Stage.height/2)
_root.lineStyle(0, 0x000000, 100);
_root.moveTo(offset[0], offset[1]);
_root.lineTo(point[0]+offset[0], point[1]+offset[1]);
_root.onMouseDown = function() {
 am = -10
 var rad = Math.sqrt((point[0]*point[0])+(point[1]*point[1]));
 var currang = (Math.asin(point[0]/rad))*(180/Math.PI);
 currang = (currang > 360) ? currang-360 : currang;
 currang = (currang < 0) ? currang+360 : currang;
 var newang = currang+am;
 newang = (newang > 360) ? newang-360 : newang;
 newang = (newang < 0) ? newang+360 : newang;
 point[0] = Math.sin(newang*(Math.PI/180))*rad;
 point[1] = Math.cos(newang*(Math.PI/180))*rad;
 trace(currang)
 _root.moveTo(offset[0], offset[1]);
 _root.lineTo(point[0]+offset[0], point[1]+offset[1]);
};

```

Does anyone know why?

PS zipped .swf/.fla attached