topical media & game development
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#javascript-processing-example-basic-color-brightness.htm / htm



  <!DOCTYPE html>
  <html><head>
  <script src="javascript-processing-example-processing.js"></script>
  <script src="javascript-processing-example-init.js"></script>
  <link rel="stylesheet" href="javascript-processing-example-style.css">
  </head><body><h1><a href="http://ejohn.org/blog/processingjs/">Processing.js</a></h1>
  <h2>Brightness</h2>
  
  <p>by Rusty Robison. 
  
  Brightness is the relative lightness or darkness of a color.
  Move the cursor vertically over each bar to alter its brightness.</p>
  
  <p><a href="http://processing.org/learning/basics/brightness.html"><b>Original Processing.org Example:</b> Brightness</a><br>
  <script type="application/processing">
  int barWidth = 5;
  int[] brightness;
  
  void setup() 
  {
    size(200, 200);
    colorMode(HSB, 360, height, height);  
    brightness = new int[width/barWidth];
  }
  
  void draw() 
  {
    int j = 0;
    for (int i = 0; i <= (width-barWidth); i += barWidth) {  
      noStroke();
      if ((mouseX > i) && (mouseX < i+barWidth)) {
        brightness[j] = mouseY;
      }
      fill(i, height, brightness[j]);
      rect(i, 0, barWidth, height);  
      j++;
    }
  }
  </script><canvas width="200" height="200"></canvas></p>
  <div style="overflow: hidden; height: 0px; width: 0px;"></div>
  
  <pre><b>// All Examples Written by <a href="http://reas.com/">Casey Reas</a> and <a href="http://benfry.com/">Ben Fry</a>
  // unless otherwise stated.</b>
  int barWidth = 5;
  int[] brightness;
  
  void setup() 
  {
    size(200, 200);
    colorMode(HSB, 360, height, height);  
    brightness = new int[width/barWidth];
  }
  
  void draw() 
  {
    int j = 0;
    for (int i = 0; i &lt;= (width-barWidth); i += barWidth) {  
      noStroke();
      if ((mouseX &gt; i) &amp;&amp; (mouseX &lt; i+barWidth)) {
        brightness[j] = mouseY;
      }
      fill(i, height, brightness[j]);
      rect(i, 0, barWidth, height);  
      j++;
    }
  }</pre>
  </body></html>
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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