Easy way to write and read some Transform to a text file in Unity3d?

Question

This is strictly in Unity3D, I have an array of 100 Transform,

I want to write those to a file on the PC desktop, and later read them.

Consider ...<

Answer 1

You can use Binary Serialization.

Create following structs:

[Serializable]
public struct SerializebleVector
{
    public float x, y, z, w;

    public SerializebleVector(float x, float y, float z, float w = 0f)
    {
        this.x = x;
        this.y = y;
        this.z = z;
        this.w = w;
    }

    public static explicit operator SerializebleVector(Quaternion a)
    {
        return new SerializebleVector(a.x, a.y, a.z, a.w);
    }

    public static implicit operator SerializebleVector(Vector3 a)
    {
        return new SerializebleVector(a.x, a.y, a.z);
    }

}

[Serializable]
public struct SerializebleTransform
{
    SerializebleVector position;
    SerializebleVector rotation;
    SerializebleVector scale;

    public SerializebleTransform(Transform tr)
    {
        position = tr.position;
        rotation = (SerializebleVector) tr.rotation;
        scale = tr.lossyScale;
    }


    public static implicit operator SerializebleTransform(Transform tr)
    {
        return new SerializebleTransform(tr);
    }
}

Save method:

public static void Save(Transform[] ts )
{
    var data = new List();

    foreach (var t in ts)
    {
        data.Add(t);
    }

    BinaryFormatter bf = new BinaryFormatter();
    using (FileStream file = File.Create (Application.persistentDataPath + "/savedTransforms.dat"))
    {
        bf.Serialize(file, data);
    }
}

Load Method:

public static void Load(out List ts) 
{
    if(File.Exists(Application.persistentDataPath + "/savedTransforms.dat"))
    {
        BinaryFormatter bf = new BinaryFormatter();
        using (FileStream file = File.Open(Application.persistentDataPath + "/savedTransforms.dat", FileMode.Open))
        {
            var data = (List)bf.Deserialize(file);
            return data;
        }
    }
    else
        ts = null;
}

PS: As far as I know you can't create Transform without GameObject, so read data from SerializebleTransform into Transform kind of manually.