CODEWITHSUNDEEP
unity-game-engine
ARLCode
ARLCode

Reputation: 651

Decreasing a float after a set amount of time

This is a little difficult to explain but I want to write a piece of code that decreases the users oxygen level after a set amount of time. For example, if the user is swimming then the users oxygen level should go down .5 every 5 seconds. I have the general idea but I can not seem to figure out how to write the code. Here is what I have thus far

C#

    public float timer = 60;
    public float oxygen = 100;
    public float decreaseOxygen = 0.5f;
    public float oxygenDecreaseInterval = 2;

    private float decreaseOxyOverTime(float amountToDecrease)
    {
        oxygen = oxygen - amountToDecrease;
        return oxygen;
    }

     private float createDelayTimer()
    {
        float delayedTime = timer - oxygenDecreaseInterval;
        InvokeRepeating("delayedTime", 0, 5f);

        return delayedTime;
    }

void Update()
{

        if (timer >= createDelayTimer())
        {
            oxText.text = "Oxygen: " + decreaseOxyOverTime(decreaseOxygen) + "%";
        }

        timer -= Time.deltaTime;
}

Upvotes: 0

Views: 103

Answers (3)

maraaaaaaaa
maraaaaaaaa

Reputation: 8193

float holdingBreath = -1f;
float delay = 5.0f;
float oxyLevel = 5.0f;
float rate = 0.5f;

void HoldBreathToggle()
{
    holdingBreath = holdingBreath > 0f ? -1f : Time.time;
}

void Update()
{
    if(holdingBreath > 0f)
    {
        if(Mathf.Approximately((Time.time - holdingBreath) % delay, 0f))
            oxyLevel -= rate;
    }
}

now all you have to do is mess with rate till you have it at a good speed.

Upvotes: 1

ARLCode
ARLCode

Reputation: 651

I figured it out, @Andrew was the closest to the answer but this is what I was looking for:

C#

public float timer = 60;
public float oxygen = 100;
public float decreaseOxygen = 0.5f;
public float oxygenDecreaseInterval = 2;

private float compareTime = 0.0f;

private float decreaseOxyOverTime(float amountToDecrease)
{
    oxygen = oxygen - amountToDecrease;
    return oxygen;
}
void Update()
{
    compareTime += Time.deltaTime;

    timeText.text = "Time Remaining: " + timer;
    oxText.text = "Oxygen: " + oxygen + "%";

    if (compareTime >= oxygenDecreaseInterval)
    {
        compareTime = 0f;
        oxText.text = "Oxygen: " + decreaseOxyOverTime(decreaseOxygen) + "%";
    }

    timer -= Time.deltaTime;

}

Upvotes: 0

Radu Diță
Radu Diță

Reputation: 14191

Why not use a Coroutine?

When you want to start the decrease in oxygen you can do something like this:

StartCoroutine("DecreaseOverTime", amountToDecreaseBy, interval);

IEnumerator DecreaseOverTime(float amountToDecreaseBy, float interval)
{
  float adjust = 0;
  while(true)
  {
   var prev = DateTime.Now;

   yield return new WaitForSeconds(interval-adjust);

   adjust = DateTime.Now.Subtract( prev ).Seconds - interval;
  }
}

I'm assuming that interval is measured in seconds.

Note: I'm calling StartCoroutine by using it's name instead of just calling the method so you can stop it later with StopCoroutine.

Upvotes: 1

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