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<!DOCTYPE html><html lang="en-US"><head><title>Programming 8. Game programming patterns</title><meta property="og:title" content="Programming 8. 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/*!
* Marp default theme.
*
* @theme default
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
*/div#\:\$p>svg>foreignObject>section,div#\:\$p>svg>foreignObject>section 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class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="1" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="1" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="4">
<h1 id="8-game-programming-patterns">8. Game programming patterns</h1>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="2" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="4">
<h2 id="observer-pattern">Observer pattern</h2>
<p><a href="https://gameprogrammingpatterns.com/observer.html">Game programming patterns: Observer</a></p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#">gameObject.SendMessage(<span class="hljs-string">"HitByLightning"</span>, SendMessageOptions.DontRequireReceiver);
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="3" data-paginate="true" data-class="invert" data-footer="Thanks to Zhamul for this code" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="3" style="--paginate:true;--class:invert;--footer:Thanks to Zhamul for this code;--heading-divider:3;" data-marpit-pagination-total="4">
<h2 id="singleton-pattern">Singleton pattern</h2>
<p><a href="https://gameprogrammingpatterns.com/singleton.html">Game programming patterns: Singleton</a><br />
<a href="https://gameprogrammingpatterns.com/singleton.html">Game programming patterns: Singleton</a></p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-function"><span class="hljs-keyword">void</span> <span class="hljs-title">Awake</span> ()</span>
{
<span class="hljs-comment">// If there is more than ONE instance of ScoreManager</span>
<span class="hljs-comment">// disabled the old instance to avoid errors</span>
<span class="hljs-keyword">if</span>(instance != <span class="hljs-literal">null</span>)
{
Debug.LogError(<span class="hljs-string">"More than ONE ScoreManager instance in game! Disabling old one."</span>);
instance.gameObject.SetActive(<span class="hljs-literal">false</span>);
}
<span class="hljs-comment">// Set instance to this so class can be used everywhere</span>
<span class="hljs-comment">// Make sure there is only ONE ScoreManager in the game</span>
instance = <span class="hljs-keyword">this</span>;
}
</code></pre>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#">ScoreManager.instance.AddScore(<span class="hljs-number">1</span>);
</code></pre>
<footer>Thanks to Zhamul for this code</footer>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="4" data-paginate="true" data-class="invert" data-heading-divider="3" lang="en-US" class="invert" data-marpit-pagination="4" style="--paginate:true;--class:invert;--heading-divider:3;" data-marpit-pagination-total="4">
<h2 id="state-pattern">State pattern</h2>
<p><a href="https://gameprogrammingpatterns.com/state.html">Game programming patterns: State</a></p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-c#"><span class="hljs-keyword">switch</span> (PlayerState)
<span class="hljs-keyword">case</span> State.Walking:
{
<span class="hljs-keyword">if</span> (Input.down(<span class="hljs-string">"Fire1"</span>))
PlayerState = State.Jumping;
}
<span class="hljs-keyword">case</span> State.Jumping:
{
}
<span class="hljs-keyword">case</span> State.Hurting
{
}
</code></pre>
</section>
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