Layout3D.cs

using UnityEngine;

[ExecuteInEditMode]
public class Layout3D : MonoBehaviour
{
    public bool mirrorX;
    public bool mirrorY;
    public bool mirrorZ;

    public bool enableXPos;
    public AnimationCurve xPosCurve;
    public bool enableYPos;
    public AnimationCurve yPosCurve;
    public bool enableZPos;
    public AnimationCurve zPosCurve;

    public bool enableXRot;
    public AnimationCurve xRotCurve;
    public bool enableYRot;
    public AnimationCurve yRotCurve;
    public bool enableZRot;
    public AnimationCurve zRotCurve;

#if UNITY_EDITOR
    void Update()
    {
        var count = transform.childCount;
        for (var i = 0; i < transform.childCount; i++)
        {
            var child = transform.GetChild(i);
            var pos = child.transform.localPosition;
            var rot = child.transform.localEulerAngles;

            if (enableXPos) pos.x = xPosCurve.Evaluate((float)i / count) * (mirrorX ? -1 : 1);
            if (enableYPos) pos.y = yPosCurve.Evaluate((float)i / count) * (mirrorY ? -1 : 1);
            if (enableZPos) pos.z = zPosCurve.Evaluate((float)i / count) * (mirrorZ ? -1 : 1);

            if (enableXRot) rot.x = xRotCurve.Evaluate((float)i / count) * 360 * (mirrorY ? -1 : 1) * (mirrorZ ? -1 : 1);
            if (enableYRot) rot.y = yRotCurve.Evaluate((float)i / count) * 360 * (mirrorX ? -1 : 1) * (mirrorZ ? -1 : 1);
            if (enableZRot) rot.z = zRotCurve.Evaluate((float)i / count) * 360 * (mirrorX ? -1 : 1) * (mirrorY ? -1 : 1);

            child.transform.localPosition = pos;
            child.transform.localEulerAngles = rot;
        }
    }
#endif
}