Push object down its local -z axis regardless of world rotation

Questions
1

So I was wondering how would i go about getting an objects rotation (which changes alot of the time) and lets say something simple like on click send the object down its relative/local -z axis…

so basically send the character backwards no matter what or where its rotation is?

I managed to have a go and got it to work but only when facing z or -z the x axis is completely screwed tho any ideas or easier way?

const object = sceneExport.getObjectByName( "player" );
  const dirToPlayer = this._FindPlayer();

    
      const controlObject = object;
      const _Q = new THREE.Quaternion();
      const _A = new THREE.Vector3();
      const _R = controlObject.quaternion.clone();
    

     
      const m = new THREE.Matrix4();
      m.lookAt(
          new THREE.Vector3(0, 0, 0),
          dirToPlayer,
          new THREE.Vector3(0, 1, 0));
      _R.setFromRotationMatrix(m);
  
      controlObject.quaternion.copy(_R);
   
    
   this._parent.SetQuaternion(this._target.quaternion);

thanks guys

2
3

Do mesh.translateXYZ functions help?

See this example (press “rotate” and “move” buttons in succession to see what happens):

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