"Howto" display sprites at user interface based on some conditions

Unity Engine
1

Here is base concept:
-I want to display health by hearts like this

in WEB I usually solve this with css repeat-x and width but I’m sure GameDev has another solution. Something like
for(I=1; I<healthcount; I++){
displayOneHeart();
}

The main trouble is I have no idea how to do it in unity and also no idea with search engine query for the right result match. That’s why I created this thread, sorry if it is duplicate (and for my eng to).

2

For each hit, do you lose a heart? If so you would create a loop and disabled at will.

Try this (Assuming Right → Left to reduce and Left → Right to increase):

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Example : MonoBehaviour {
    [SerializeField]
    List<GameObject> hearts = new List<GameObject>();

    public void ReduceHeartsBy(int amount) {
        for(int i = this.hearts.Count - 1, disabled = 0; i > 0; i--) {
            if(this.hearts[i] != null) {
                if(disabled < amount) {
                    if(this.hearts[i].activeSelf == true) {
                        this.hearts[i].SetActive(false);
                        disabled++;
                    }
                }
            }
        }
    }

    public void IncreaseHeartsBy(int amount) {
        for(int i = 0, enabled = 0; i < this.hearts.Count; i++) {
            if(this.hearts[i] != null) {
                if(enabled < amount) {
                    if(this.hearts[i].activeSelf == false) {
                        this.hearts[i].SetActive(true);
                        enabled++;
                    }
                }
            }
        }
    }
}
1 Like
3

Heres a quick example

using UnityEngine;
using System.Collections;

public class ShowHearts : MonoBehaviour
{
    //First option, have them in the scene but disabled, enable them via script
    public GameObject[] hearts; //Assign the hearts here, preferrably in order to enable
    public int amountToShow = 0; //self explanatory

    void Start()
    {
        foreach(GameObject heart in hearts) //For every heart, do something
        {
            heart.SetActive(false); //Disable all the hearts for now
        }
    }
   
    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Space)) //if you press SPACEBAR
            Show(); //Show any that arent already shown
        if(Input.GetKeyDown(KeyCode.W)) //if you press W
            amountToShow++; //add 1 to amountToShow so we can enable another one
    }

    void Show()
    {
        for(int i = 0;i < amountToShow;i++)
        {
            hearts[i].SetActive(true);
        }
    }
}
1 Like
4

Awesome. Thanks a lot