CODEWITHSUNDEEP
c#visual-studiounity-game-engine
Omar Moussa
Omar Moussa

Reputation: 13

Running a loop inside Update()

I need to change the scale of an object based on a value from an array (data_int[]), it should increase if the value is increasing and vice versa. the code I tried does that but I can only visualize the end result. However, I need to visualize every step in the loop. 

void Update()
{
    if (MyFunctionCalled == false)
    {

        for (int i = 1; i < 25; i++)
        {
            if (data_int[i] > data_int[i - 1])
            {
                transform.localScale += new Vector3(0.01f, 0.01f, 0.01f);
            }
            else if (data_int[i] < data_int[i - 1])
            {
                transform.localScale += new Vector3(-0.01f, -0.01f, -0.01f);
            }

        }
        MyFunctionCalled = true;
   }
  }     
 }
}

Upvotes: 0

Views: 848

Answers (2)

Paviel Kraskoŭski
Paviel Kraskoŭski

Reputation: 1419

You can use a Coroutine function to achieve your goal.

The line, yield return new WaitForSeconds(.5f) will simulate waiting for .5 seconds before continuing. yield return null, yield return new WaitForEndOfFrame(), and others may also be used to delay the execution of a Coroutine. More information about when each of these return may be found here. This question on coroutines may also be useful.

    void Start()
    {
        StartCoroutine(ScaleObject());
    }

    IEnumerator ScaleObject()
    {
        for (int i = 1; i < 25; i++)
        {
            if (data_int[i] > data_int[i - 1])
            {
                transform.localScale += new Vector3(0.01f, 0.01f, 0.01f);
            }
            else if (data_int[i] < data_int[i - 1])
            {
                transform.localScale += new Vector3(-0.01f, -0.01f, -0.01f);
            }
            yield return new WaitForSeconds(.5f);
        }
    }

Upvotes: 2

Cid
Cid

Reputation: 15247

The whole loop is executed during 1 frame, you can't see the step by step. You can "simulate" the loop outside of the method Update

In example :

// initialize your iterator
private int i = 1;

// I removed the checks on MyFunctionCalled because this may be irrelevant for your question
void Update()
{
    // use an if instead of a for
    if (i < 25)
    {
        if (data_int[i] > data_int[i - 1])
        {
            transform.localScale += new Vector3(0.01f, 0.01f, 0.01f);
        }
        else if (data_int[i] < data_int[i - 1])
        {
            transform.localScale += new Vector3(-0.01f, -0.01f, -0.01f);
        }
        // this is the end of the supposed loop. Increment i
        ++i;
    }
    // "reset" your iterator
    else
    {
        i = 1;
    }
}

Upvotes: 1

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