Slerp/Rotational Problem Query

Questions & Answers
1

First, I am trying to design a simple space-sim, which doesn’t seem to be so simple in fact.
Second, let me show you a picture.

alt text

Fig(A): It is a my gameplay view.
Fig(B): Scene view with World/Local positioning of my gameobject.
Fig(C): Let’s skip this for now as I will explain it in due time.
Chart: A Hierarchy chart where 4 gameobjects are child of one single gameobject.

Now, onto my problem:

I have this code:

public class mouseTurn : MonoBehaviour {
    public float speedmultiplier = 0.005f;

    void FixedUpdate(){
       float xvalue = Input.mousePosition.x;
       int screenwidth = Screen.width;
       float xmidpoint = screenwidth/2;

       constantForce.relativeTorque = new Vector3(0f,(xvalue-xmidpoint)*speedmultiplier,0f);
    }
}

This script is attached to my “Main GameObject”(which also has a RigidBody/ConstantForce attached to it), which enables the entire hierarchy to rotate, which is working absolutely fine[I ommited a lot of code(ex. Y-Axis rotation) and other things to make my question precise and onto point].

What I want to accomplish is that when ever I rotate my object, the child object “Capsule” should rotate just a small amount, to the right/left of my camera, in Time t as to show the effect of capsule turn(For relevance: check Freelancer/Black Prophecy gameplay)[As shown in Fig(C)].

I tried using Quaternion Slerp but could not figure out a way to achieve said goal. While using quaternion slerp, my “Capsule” would not rotate along with camera.

If you see my previous post, you can see that I was able to achieve a fluid rotation using “ConstantForce”, which you can also see in the give code. Since, I have optimized the said code a lot(i.e why I have only posted a snippet of it).

So if any Unity Gurus are out there who can help me with my dilemma, I would be very thankful(Atleast show me a path to a solution).

2

Basically, instead of making the camera a direct child of the main movement manager, make it seperate with a script that goes something like this-

public Transform followThis; // Put your capsule here
public float smoothingFactor = 3; // Make this higher to make the camera stick more closely to the target. 

private Vector3 posOffset;

void Start()
{
    posOffset = transform.position - followThis.position;
}

void LateUpdate()
{
    transform.position = followThis.position + posOffset;
    transform.rotation = Quaternion.Slerp(transform.rotation, followThis.rotation, Time.deltaTime * smoothingFactor);
}

You may, in fact, wish to put this script on a ‘parent’ object, that sits on top of the capsule itself, with the actual camera a child of that object offset a fair way.