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POUsing C# 5 async to wait for something that executes over a number of game frames
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  1. POUsing C# 5 async to wait for something that executes over a number of game frames
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    copied!<p>My son is writing a simple RPG game that has a number of non-player characters (aka NPC's). Each NPC has an associated "script" that controls its behaviour. We were going to use a mini custom script language to write these behaviours but I'm now wondering if this would be better done in C#5/Async.</p> <p>Taking a really simple example, suppose one of the NPC's just walks between two points I'm thinking it would be nice to write something like this:</p> <pre><code>while (true) { await WalkTo(100,100); await WalkTo(200,200); } </code></pre> <p>The WalkTo method would be an async method that handles everything to do with walking between the two points and does this over a number of frames from the game loop. It's not a blocking method that can be off-loaded to a background thread.</p> <p>And this is where I'm stuck... I haven't been able to find any examples using async/await in this manner, but it seems it would be perfect for it.</p> <p>Ideas?</p> <hr> <p>Here's some very rough pseudo code for what I'd like to do:</p> <pre><code>class NpcBase { // Called from game loop public void onUpdate(double elapsedTime) { // Move the NPC . . . // Arrived at destination? if (Arrived) { // How do I trigger that the task is finished? _currentTask.MarkComplete(); } } // Async method called by NPC "script" public async Task WalkTo(int x, int y) { // Store new target location // return a task object that will be "triggered" when the walk is finished _currentTask = &lt;something??&gt; return _currentTask; } Task _currentTask; } </code></pre>
 

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