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POWPF: Rendering a canvas at Random Points
 

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  1. POWPF: Rendering a canvas at Random Points
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    <p><em>With reference to <a href="https://stackoverflow.com/questions/505040/developing-a-robocode-type-game-with-net-for-a-school-assignment">this programming game</a> I am currently building.</em></p> <p>When the game is started, I am generating these robots at supposingly random points on a Canvas, and at first look (adding one or two bots at the same time), this seemed to be working as it should.</p> <p>...but, when I added a ton of bots at the same time, this is how they where "randomly" appeared on the canvas:</p> <p><a href="http://img22.imageshack.us/img22/6895/randombotpositionlf7.jpg" rel="nofollow noreferrer">alt text http://img22.imageshack.us/img22/6895/randombotpositionlf7.jpg</a></p> <p>The supposedly random points don't seem that random after all...they're just <strong>points of a straight line</strong>!</p> <hr> <p>Here is how I am calculating the Points:</p> <pre><code>SetStartingPoint(GetRandomPoint(ArenaWidth, ArenaHeight)); //the width and height are 550, 480 at the moment //which calls: private Point GetRandomPoint(double maxWidth, double maxHeight) { return new Point(new Random().Next(0, (int)(maxWidth-80)), new Random().Next(0, (int)maxHeight)); } //and ultimately: private void SetStartingPoint(Point p) { Translate_Body.X = (double)p.X; Translate_Body.Y = (double)p.Y; } </code></pre> <p>As regards the above code, <code>Translate_Body</code> is of type <code>TranslateTransform</code> of the robot (<code>canvas</code>), so by assigning its <code>X</code> and <code>Y</code> properties, it will change its position to the new values</p> <hr> <p>What am I missing here?</p> <hr> <p><strong>[UPDATE] Solution:</strong></p> <p>The problem was like you all suggested, the numbers weren't being seeded properly because of the new instantiations.</p> <p>I now changed the code to use a single <code>Random</code> variable and to seed all the points from it.</p> <p><strong>But I still can't understand why the points where being generated at a seemingly straight line of coordinates. <em>Is anyone able to explain this ?</em></strong> </p> <hr>
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    1. COCan you give some more context? What is Translate_Body? What's the XAML look like for your canvas?
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      1. USDavidN
    2. COI don't think that's relevant in this case, but still, I added the explanation in my post
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    3. COThe random calls are always going to generate the same number. One scenario I can imagine is that you were using the coordinates of the previous "bot" as the starting point of the next bot and offsetting from there...
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