Unity 3D Multiple Transforms Copy / Paster

// Improved TransformCopier
// by @robotduck 2011

// Copy single or multiple local transforms from and to sets of gameobjects.

// based on original single-object-copy script from UnifyCommunity Wiki by Steve Allison-Bunnell (with thanks to aarku)


using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;

public class TransformCopier : ScriptableObject
{
    private static Vector3 position;
    private static Quaternion rotation;
    private static Vector3 scale;

    private static List<StoredLocalTransform> storedTransforms;

    [MenuItem("Custom/Transform Copier/Copy Transform")]
    static void DoRecord ()
    {
        storedTransforms = new List<StoredLocalTransform>();

        foreach (Transform t in Selection.transforms) {
            storedTransforms.Add(new StoredLocalTransform(t));
        }

        if (storedTransforms.Count == 1)
        {
            EditorUtility.DisplayDialog ("Transform Copy", "Local position, rotation, & scale of " + Selection.activeTransform.name + " copied.", "OK", "");
        } else {
            EditorUtility.DisplayDialog ("Transform Copy", "Local position, rotation, & scale of " + storedTransforms.Count + " objects copied.", "OK", "");
        }
    }

    [MenuItem("Custom/Transform Copier/Paste Transform")]
    static void DoApply ()
    {
        string resultString = "";
        if (storedTransforms.Count == 1)
        {
            StoredLocalTransform stored = storedTransforms[0];

            // paste single transform to all selected:
            foreach (Transform t in Selection.transforms) {
                t.localPosition = stored.localPosition;
                t.localRotation = stored.localRotation;
                t.localScale = stored.localScale;
            }

            int num = Selection.transforms.Length;
            resultString = "Local position, rotation, and scale of " + stored.name + " pasted to ";
            resultString += (num == 1 ? Selection.activeTransform.name : num+" selected objects")+".";

        } else {
            // stored & selected counts must match:
            if (storedTransforms.Count == Selection.transforms.Length)
            {
                int n=0;
                foreach (Transform t in Selection.transforms)
                {
                    t.localPosition = storedTransforms[n].localPosition;
                    t.localRotation = storedTransforms[n].localRotation;
                    t.localScale = storedTransforms[n].localScale;
                    ++n;
                }

                resultString = "Local position, rotation, & scale of " + storedTransforms.Count + " objects pasted.";

            } else {
                resultString = "Error: When copying from multiple objects, the number of objects selected must match the number of objects copied from.";
            }

        }

        EditorUtility.DisplayDialog ("Transform Paste", resultString, "OK", "");

    }
}

struct StoredLocalTransform
{

    public Vector3 localPosition;
    public Quaternion localRotation;
    public Vector3 localScale;
    public string name;

    public StoredLocalTransform (Transform t)
    {
        this.localPosition = t.localPosition;
        this.localRotation = t.localRotation;
        this.localScale = t.localScale;
        this.name = t.name;
    }
}