如何使用Xcode 10在SceneKit编辑器中旋转对象

Question

I'm following a tutorial where you can see the Earth rotating. All seems really easy: you put a sphere object with SceneKit Editor and then you add a rotation action.

This is the action I'm adding:

The thing is that in the project I download from the internet all is working perfect but when I do this in a new project my Earth doesn't rotate one single pixel! All the attributes I can see in the inspector seems to be exactly the same.

Probably there is some silly thing I am not considering...

Answer 1

I wasn't able to find RotateByAxisAngle in the Apple developer documentation on SceneKit animation. Is it possible the tutorial is slightly out of date? You might want to try one of the other functions listed in the Apple documentation . Otherwise I'd try setting one of your rotation values from 0.00 to 6.28319 or 360 degrees in radians.

Answer 2

I had the same problem, the rotation wasn't working after adding a RotateBy Axis Angle Action , but after I updated the Angle value, it started rotating.

To change the Angle value, just select your Action from the Actions bar and then from Attributes Inspector menu, change the Angle .

The default Angle value is set to 0 , just change it to 1 and notice you should also set Axis values and they shouldn't be all zero, like below:

Now the rotation should work all well.