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#javascript-processing-example-basic-structure-functions.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>Functions</h2>
  
  <p>The draw_target() function makes it easy to draw many distinct targets. 
  Each call to draw_target() specifies the position, size, and number of 
  rings for each target.</p>
  
  <p><a href="http://processing.org/learning/basics/functions.html"><b>Original Processing.org Example:</b> Functions</a><br>
  <script type="application/processing">
  void setup() 
  {
    size(200, 200);
    background(51);
    noStroke();
    smooth();
    noLoop();
  }
  
  void draw() 
  {
    draw_target(68, 34, 200, 10);
    draw_target(152, 16, 100, 3);
    draw_target(100, 144, 80, 5);
  }
  
  void draw_target(int xloc, int yloc, int size, int num) 
  {
    float grayvalues = 255/num;
    float steps = size/num;
    for(int i=0; i<num; i++) {
      fill(i*grayvalues);
      ellipse(xloc, yloc, size-i*steps, size-i*steps);
    }
  }
  </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>
  void setup() 
  {
    size(200, 200);
    background(51);
    noStroke();
    smooth();
    noLoop();
  }
  
  void draw() 
  {
    draw_target(68, 34, 200, 10);
    draw_target(152, 16, 100, 3);
    draw_target(100, 144, 80, 5);
  }
  
  void draw_target(int xloc, int yloc, int size, int num) 
  {
    float grayvalues = 255/num;
    float steps = size/num;
    for(int i=0; i&lt;num; i++) {
      fill(i*grayvalues);
      ellipse(xloc, yloc, size-i*steps, size-i*steps);
    }
  }</pre>
  </body></html>
  


(C) Æliens 20/2/2008

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