Question by HardRockz · Sep 27, 2016 at 10:42 AM · arrays

Unity C# Transform array returns only last value

Hi guys,

I have a list of object positions in a Dictionary and i am trying to create Transform array using those positions. Below is my code. RetTransform is a public game object and i am changing the x position of RetTransform game object and then adding it to the myTransformArray using foreach loop.

public Transform[] getAllTransfromVal(int arrayNo) {

     int countArray = 0;
     if (arrayNo == 1) {
         int arrCount = timeStampDataArray.Count;
         private Transform[] myTransformArray = new Transform[arrCount];
         int[] xxx = new int[arrCount];
         foreach (KeyValuePair<int,timeStampData> pair in timeStampDataArray) {
             Vector3 temp = RetTransform.transform.position;
             temp.x = pair.Value.OBJPos;
             RetTransform.transform.position = temp;
             myTransformArray [countArray] = RetTransform.transform;
             print ("key" +countArray +" x " + myTransformArray [countArray].position.x + " y " + myTransformArray [countArray].position.y + " z " + myTransformArray [countArray].position.z);
             countArray++;

         }

         for (int k = 0; k < myTransformArray.Length; k++) {
             print ("==== " + k +"===== "+myTransformArray [k].position.x);
         }

In the first print statement it prints values like below which is correct.

key0 x -29 y 1.8 z -4.3
key1 x -25 y 1.8 z -4.3
key2 x -35 y 1.8 z -4.3

But in the second print statement it prints last x value 3 times

==== 0===== -35
==== 1===== -35
==== 2===== -35

Need some help guys.Thanks in advance :-)

Add comment · Show 6

doublemax · Sep 27, 2016 at 11:23 AM 0

 myTransformArray [countArray] = RetTransform.transform;

This line doesn't copy the data, it just stores a reference to RetTransform.transform. And as that changes on each iteration of the loop, you'll get the last value three times.

But i can't tell you how to force a deep copy of the transform.

Do you really need an array of Transforms? If you need only the positions use an array of Vector3.

HardRockz · Sep 27, 2016 at 11:28 AM 0

@doublemax Thank you for pointing that out :-) I am using that Transform array to move my object using Nav $$anonymous$$esh Agent using waypoints. Any suggestions ?

Bonfire-Boy HardRockz · Sep 27, 2016 at 12:22 PM 0

If you need it to be an array of Transforms rather than just positions as doublemax suggested, one option would be to create new ones for the purpose.

So for example, ins$$anonymous$$d of setting RetTransform's position and then setting the array element to its Transform, you could clone RetTransform each time, set the clone's position and assign the clone to the array element. I guess there might be a bunch of other stuff you'd need, managing these objects, but I think the basic idea could be the basis of a solution.

HardRockz · Sep 27, 2016 at 12:20 PM 0

I used Vector3 array ins$$anonymous$$d of Transform array as you @doublemax suggested.Thank you :-)

Nestoraj HardRockz · Sep 27, 2016 at 02:20 PM 0

You can store all the data from a Transform in a single Vector3 array using this:

Vector3[] transformData = new Vector3[3]; transformData[0] = RetTransform.transform.position; transformData[1] = RetTransform.transform.rotation.eulerAngles; transformData[2] = RetTransform.transform.localScale;

and then you can get the data back using:

YourNewObject.transform.localPosition = transformData[0]; YourNewObject.transform.localRotation = Quaternion.Euler(transformData[1]); YourNewObject.transform.localScale = transformData[2];

I hope it helps you =D

HardRockz Nestoraj · Sep 27, 2016 at 02:24 PM 0

Thank you @Nestoraj

I will take a look at it

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Unity C# Transform array returns only last value

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