Now I knew it . It is "Spherical coordinate".
On 11月16日, 下午7时32分, "[email protected]" <[email protected]> wrote: > but I can't understood it. > > On 11月16日, 下午7时24分, "[email protected]" <[email protected]> wrote: > > > Now I solved by myself . :'( > > the code Cut from demo website: > > it can be set at anywhere: > > ================================== > > speed is rotation default speed, it can be ignore. Set it for a lot of > > round space have a different speed easyly. > > piRad is deal for angle to rad. > > ================================== > > ================================== > > var speed:Number = 1 > > var piRad:Number = Math.PI / 180 > > function aroundSphere(dx:Number,dy:Number) : void{ > > var rx:Number = (-dx / speed) * piRad; > > var ry:Number = (-dy / speed) * piRad; > > var rxs:Number = Math.sin(rx); > > var rys:Number = Math.sin(ry); > > var rxc:Number = Math.cos(rx); > > var ryc:Number = Math.cos(ry); > > var extra:Number = z * ryc - x * rys > > x = z * rys + x * ryc > > z = y * rxs + extra * rxc > > y = y * rxc - extra * rxs} > > > ================================== > > ================================== > > On 11月15日, 下午11时44分, mogg <[email protected]> wrote: > > > > One of the simplest ways is to use an "ObjectContainer3D" and place > > > your visiable object inside this object container. > > > > Steps: > > > 1) Add an empty "ObjectContainer3D" to the scene > > > 2) Then add your other object (sphere) inside this > > > "ObjectContainer3D". > > > 3) To do "free rotation" only rotate one axis of each of these two > > > object. > > > 4) Rotate the X axis of your inner object (sphere) and then rotate the > > > Y axis of the outer object "ObjectContainer3D". > > > > Play around with the results. Try swapping which axis you rotate on > > > each object. > > > > This should give you the free rotation you are looking for. > > > > On Nov 15, 3:37 am, "[email protected]" <[email protected]> wrote: > > > > > I want to do some interest thing. So I created a sphere, and rotate it > > > > by change mouse position. And if I turn the yAxis to another side , > > > > the sphere will not rotate will mouse will. > > > > > So if you cant understand, then see the website. It can free rotation > > > > it easyly. > > > > > exp:http://www.speakinthumbs.com/
