How to change a property from a spawned object in its spawner object using a slider

Question

I have an object with a script (Defender) attached to it. This script has a defRadius property. Also I am spawning my object in a circle using the following code:

CircleSpawn

public class CircleSpawn : MonoBehaviour
{
    public float radius, radiusLast, spin, spinLast;
    public int numOfItems;
    public GameObject clonedObject;
    public List<GameObject> spawnedObjects;
}

CircleSpawnEditor

[CustomEditor(typeof(CircleSpawn))]
public class CircleSpawnEditor : Editor
{
public override void OnInspectorGUI ()
{
    var tar = (CircleSpawn)target;    
    EditorGUILayout.LabelField("Radius"); // Set as required
    tar.radius = EditorGUILayout.Slider(tar.radius, 0f, 100f);          
    EditorGUILayout.LabelField("Angle"); // Set as required
    tar.spin = EditorGUILayout.Slider(tar.spin, 0f, 360f);              
    EditorGUILayout.LabelField("Number of Items"); // Set as required
    tar.numOfItems = EditorGUILayout.IntSlider(tar.numOfItems, 0, 36);  
    EditorGUILayout.LabelField("Object");
    tar.clonedObject = (GameObject)EditorGUILayout.ObjectField(tar.clonedObject, 
    typeof(GameObject), true);

    float angle, angleBetween = 360.0f / tar.numOfItems;

    if (tar.spawnedObjects == null)
        tar.spawnedObjects = new List<GameObject>();

    // Solution #1    
    if (tar.spawnedObjects.Count != tar.numOfItems)
    {
        foreach (var ob in tar.spawnedObjects)
            DestroyImmediate(ob);

        tar.spawnedObjects.Clear();
        angle = 0f;

        for (int i = 0; i < tar.numOfItems; i++)
        {
            var rot = Quaternion.Euler(0f, 0f, tar.spin + angle);
            var localPos = rot * Vector3.right * tar.radius;    
            tar.spawnedObjects.Add(Instantiate(tar.clonedObject,
            tar.transform.position + localPos, rot));
            angle += angleBetween;
        }
    }

    // Solutions #2 & 3    
    if (!Mathf.Approximately(tar.spin, tar.spinLast) ||
        !Mathf.Approximately(tar.radius, tar.radiusLast))
    {
        tar.spinLast = tar.spin;
        tar.radiusLast = tar.radius;    
        angle = 0f;

        for (int i = 0; i < tar.numOfItems; i++)
        {
            var rot = Quaternion.Euler(0f, 0f, tar.spin + angle);
            var localPos = rot * Vector3.right * tar.radius;    
            tar.spawnedObjects[i].transform.position = 
            tar.transform.position + localPos;
            tar.spawnedObjects[i].transform.rotation = rot;
            angle += angleBetween;
        }
    }
}
}

How can I spawn the objects replacing radius in CircleSpawn with the defRadius (property of the Defender script attached to the object to be cloned)?

Hey, so you just want to change the value on the original prefab, right? — Lece, May 03 '18 at 05:03
@Lece yes. Generally changing it's value for the `radius` in `CircleSpawn` — NSSwift, May 03 '18 at 05:08
Excellent! And if you ever wish to save the other variables (spin/numItems) to the original prefab, simply replicate what I've done with radius :) — Lece, May 03 '18 at 11:34
@Lece I would be grateful if you could take a look at this question for me https://stackoverflow.com/questions/50167887/how-can-i-adjust-shape-dimensions-of-one-clone-to-affect-all-other-clones-in-the — NSSwift, May 04 '18 at 05:41

score 2 · Accepted Answer · answered May 03 '18 at 05:25

To read and write values from the original prefab, we first save a reference to the new script Defender and replace tar.radius in the original code:

public class Defender : MonoBehaviour
{
    public float Radius;
}

[CustomEditor(typeof(CircleSpawn))]
public class CircleSpawnEditor : Editor
{
    private Defender _defender;

    public override void OnInspectorGUI ()
    {
        var tar = (CircleSpawn)target;
        tar.clonedObject = (GameObject)EditorGUILayout.ObjectField(tar.clonedObject,
            typeof(GameObject), true);
        if (!tar.clonedObject) return;

        if (!_defender)
        {
            _defender = tar.clonedObject.GetComponent<Defender>();
            if (!_defender) return;
        }

        EditorGUILayout.LabelField("Radius"); // Set as required
        _defender.Radius = EditorGUILayout.Slider(_defender.Radius, 0f, 100f);
        EditorGUILayout.LabelField("Angle"); // Set as required
        tar.spin = EditorGUILayout.Slider(tar.spin, 0f, 360f);
        EditorGUILayout.LabelField("Number of Items"); // Set as required
        tar.numOfItems = EditorGUILayout.IntSlider(tar.numOfItems, 0, 36);
        EditorGUILayout.LabelField("Object");

        float angle, angleBetween = 360.0f / tar.numOfItems;

        if (tar.spawnedObjects == null)
            tar.spawnedObjects = new List<GameObject>();

        // Solution #1
        if (tar.spawnedObjects.Count != tar.numOfItems)
        {
            foreach (var ob in tar.spawnedObjects)
                DestroyImmediate(ob);

            tar.spawnedObjects.Clear();
            angle = 0f;

            for (int i = 0; i < tar.numOfItems; i++)
            {
                var rot = Quaternion.Euler(0f, 0f, tar.spin + angle);
                var localPos = rot * Vector3.right * _defender.Radius;
                tar.spawnedObjects.Add(Instantiate(tar.clonedObject,
                tar.transform.position + localPos, rot));
                angle += angleBetween;
            }
        }

        // Solutions #2 & 3
        if (!Mathf.Approximately(tar.spin, tar.spinLast) ||
            !Mathf.Approximately(_defender.Radius, tar.radiusLast))
        {
            tar.spinLast = tar.spin;
            tar.radiusLast = _defender.Radius;
            angle = 0f;

            for (int i = 0; i < tar.numOfItems; i++)
            {
                var rot = Quaternion.Euler(0f, 0f, tar.spin + angle);
                var localPos = rot * Vector3.right * _defender.Radius;
                tar.spawnedObjects[i].transform.position =
                tar.transform.position + localPos;
                tar.spawnedObjects[i].transform.rotation = rot;
                angle += angleBetween;
            }
        }
    }
}

How to change a property from a spawned object in its spawner object using a slider

1 Answers1

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