samples.libcna.com/SpriteEffects.html at main · libcna/samples.libcna.com · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Sprite Effects — CNA Samples</title>
<meta name="description" content="The XNA Sprite Effects Sample ported to C++ with CNA: five animated pixel-shader effects drawn through SpriteBatch.">
<link rel="stylesheet" href="assets/site.css">
</head>
<body>

<header class="site-head">
  <div class="wrap">
    <h1 class="site-title"><a href="index.html">CNA Samples</a></h1>
  </div>
</header>

<main class="wrap">

  <div class="detail-head">
    <h1>Sprite Effects</h1>
  </div>
  <p class="origin">Ported from Microsoft's XNA 4.0 <em>Sprite Effects Sample</em>.</p>
  <p class="sample-source">
    <a href="https://github.com/libcna/cna-samples/tree/develop/samples/SpriteEffects">Source for this sample on GitHub ↗</a>
  </p>

  <img class="shot" src="assets/img/sprite-effects.png" width="800" height="480"
       alt="A cat lit by an animated normal map over a snowy glacier background.">

  <a class="play" href="SpriteEffects/SpriteEffects_cna_samples.html" target="_blank" rel="noopener">Play ▸</a>
  <p class="play-note">Opens in a new tab and runs in this browser. Click the canvas first so it receives the keyboard.</p>

  <nav class="pager pager-before-about" aria-label="Sample navigation">
    <a class="prev" href="ReachGraphicsDemo.html"><span class="label">Previous</span>Reach Graphics Demo</a>
    <a class="next" href="SpriteSheet.html"><span class="label">Next</span>Sprite Sheet</a>
  </nav>

  <section>
    <h2>About this sample</h2>
    <p>
      This sample demonstrates five custom pixel-shader techniques while keeping the familiar
      SpriteBatch drawing model. It begins with four views of a glacier at different saturation
      levels, including one that pulses between colour and grayscale.
    </p>
    <p>
      The remaining views dissolve a moving cat with a scrolling overlay, refract the cat, refract
      the glacier itself, and light a two-dimensional cat in real time with a normal map. The
      animations make effect parameters and secondary texture samplers visible rather than merely
      compiling them.
    </p>
    <p>
      Two sample-owned XNA Content Pipeline processors prepare the original textures: one combines
      the cat image with a separate alpha image, and the other converts a depth image into signed
      normal vectors. The browser build consumes those original compiled XNA assets along with all
      four original compiled effects.
    </p>
  </section>

  <section>
    <h2>Controls</h2>
    <table class="controls">
      <tr><th>Action</th><th>Keyboard</th><th>Gamepad</th></tr>
      <tr><td>Next effect</td><td><kbd>Space</kbd></td><td><kbd>A</kbd></td></tr>
      <tr><td>Exit</td><td><kbd>Esc</kbd></td><td><kbd>Back</kbd></td></tr>
    </table>
    <p class="play-note">
      The sequence wraps after normal-mapped lighting. In the browser, exiting ends the sample
      rather than closing the tab.
    </p>
  </section>

  <nav class="pager">
    <a class="prev" href="ReachGraphicsDemo.html"><span class="label">Previous</span>Reach Graphics Demo</a>
    <a class="next" href="SpriteSheet.html"><span class="label">Next</span>Sprite Sheet</a>
  </nav>

</main>

<footer class="site-foot">
  <div class="wrap">
    <p>
      The sample is Microsoft's, published under the Microsoft Permissive License.
      The C++ port and the WebAssembly build are CNA.
    </p>
  </div>
</footer>

</body>
</html>