Rotate An Object Around Z Axis Relative To Camera

Hello everyone,

I am developing a cube game but i am stuck at one point, the problem is that finger gesture to rotate the cube around its Z axis ( at default ). But i am also rotating cube around x and y so player see all of its faces. Problem begins here.

Lets say if i rotate the cube on its back face facing the camera, Z axis is not the axis i want to Rotate gesture takes place anymore, because relative to Camera axis Z is rotating cube around X and Z.

Let me explain more with graphical help:

When X and Y rotations are 0,0 desired behaviour is achieved here: https://gyazo.com/38bffb715207cfd532dbc5f6ccd8126b

But if i rotate the cube to see its other sides, and try to rotate it like before, behaviour changes ( naturally ) to this: https://gyazo.com/06fc28bad9501809efe8063afc0a9b48

My question is, how can i calculate the rotation so it always compute the rotation according to face towards camera.

Thank you.

 

try this.

Code (CSharp):

1.  
2. // put this outside method
3. Vector3 targetAngle = new Vector3 () ;
4. ...
5. // this inside method
6. targetAngle += deltaXYZ ;
7. myTransform.rotation = Quaternion.Euler ( targetAngle ) * myTransform.rotation ; // global rotation

I think something like that.

Or you can put block in parent object. And rotate parent object instead, as reference frame.

 

Thank you, this is the solution of my problem!