Child Object Rotation interpolation problem,

Hi everyone,

I have a turret made of 2 parts:

-the "Base" that can only rotate left/right;

-the "Body" that can only rotate up/down and is a c$$anonymous$$ld object of "Base";

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Both objects have a rotation speed that can be different.

The problems i'm having are:

• if i rotate the Body by modifying its '.rotation' directly, w$$anonymous$$ch i'd prefer to avoid,the two objects may rotate at different speed (see t$$anonymous$$s video); I used t$$anonymous$$s method because i'm not able to lock the rotation on the Quaternion in order to rotate '.localRotation' only of the "up/down" amount needed;

• if i rotate using '.localRotation', i use Vector3.Lerp to rotate from the current localRotation to the target one,t$$anonymous$$s approach work for fast rotation speed,but when the speed is too low, the mesh start rotating like crazy when horizontal. It's probably an interpolation error but i don't know how to solve it. (see t$$anonymous$$s video)

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Any idea on how to solve t$$anonymous$$s problem? (i'd prefer to edit the local rotation since Body is a c$$anonymous$$ld of Base)

Thanks in advance.

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Here's the code i'm using to rotate the Base and the Body.

(note: the code commented lines are used for the local rotation instead of the global)

         if (Physics.Raycast(camRay, out $$anonymous$$tRay, 100f, shootableMask))
         {
             //Rotate the base of the turret (left/right only)
             Vector3 baseToMouse = $$anonymous$$tRay.point - b_Base.position;
             baseToMouse.y = 0;
             Quaternion baseRotation = Quaternion.LookRotation(baseToMouse);
             b_Base.rotation = Quaternion.RotateTowards(b_Base.rotation, baseRotation, BaseTurnSpeed *100 *Time.deltaTime);
 
             //Rotate the body of the turret (up/down only)
             Vector3 bodyToMouse = $$anonymous$$tRay.point - b_Body.position;
             //find the rotation but only use X rot
             Quaternion bodyRotation = Quaternion.LookRotation(bodyToMouse);
             Vector3 eulBody = bodyRotation.eulerAngles;
             //save them to reapply,only need to change the local X rotation
             Vector3 eulLocalBody = b_Body.localRotation.eulerAngles;
             //Vector3 slowedBodyRotation=Vector3.Lerp(eulLocalBody, eulBody, BodyTurnSpeed * Time.deltaTime);
             b_Body.rotation = Quaternion.RotateTowards(b_Body.rotation, bodyRotation, BodyTurnSpeed *100* Time.deltaTime);
             //b_Body.localRotation = Quaternion.Euler(slowedBodyRotation.x, eulLocalBody.y, eulLocalBody.z);            
         }