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<h1 class="f-white">Object Pooling</h1>
<span class="meta">Posted by
<a target="_blank" href="https://twitter.com/deadmonstors">Josh Mobley</a> on October 24 2020
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<p>University Tower Defence Game</p>
<br>
<h2 class="post-title">Object Pooling</h2>
<iframe width="560" height="315" src="https://www.youtube.com/embed/-Bgl3AXwzYg?showinfo=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<br><br>
<p>The video above shows my object pooling script that I made a script that allowed me to easily
pool and unpool objects by an id at a "reasonable" rate.
This is an example code that is needed for generating: </p>
<pre><code>
GameObject isPooled = objectPooler.curObjectPooler.getObject(ID);
GameObject curBullet = isPooled;
if (!isObjectPooled)
curBullet = Instantiate(PREFAB);
</code></pre><br>
<h2>Data Structure</h2>
<p>This is all stored in a data structure below. This makes it so that I can see if it is already in
the array however allows the string key to be the same on multiple objects so that there can be more
than one "bullets" id.</p>
<pre><code spellcheck="false">public List<KeyValuePair<string, GameObject>> objectPool;</code></pre><br>
<h2>Issues</h2>
<p>While this solution worked there was a few problems, including the objects not resetting to
default numbers meaning that enemies would spawn dead, and the wrong class. Which resulted in some
interesting side effects. For Example:</p>
<iframe width="560" height="315" src="https://www.youtube.com/embed/kwmzc38T6Ek?showinfo=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<br><br>
<h2>Pros</h2>
<p>This system however enabled me to be able to spawn mass amounts of enemies with little to no
loss in fps a lot better than creating a new enemy everytime I needed it and was a great skill to
learn. All bullets and enemies in the video below is using the object pooler system.
</p>
<iframe width="560" height="315" src="https://www.youtube.com/embed/POXiNS1v1dQ?showinfo=0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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