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#javascript-processing-example-topic-motion-linear.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>Linear</h2>
  
  <p>Changing a variable to create a moving line.  
  When the line moves off the edge of the window, 
  the variable is set to 0, which places the line
  back at the bottom of the screen.</p>
  
  <p><a href="http://processing.org/learning/topics/linear.html"><b>Original Processing.org Example:</b> Linear</a><br>
  <script type="application/processing">
  float a = 100;
  
  void setup() 
  {
    size(200, 200);
    stroke(255);
    frameRate(30);
  }
  
  void draw() 
  {
    background(51);
    a = a - 1;
    if (a < 0) { 
      a = height; 
    }
    line(0, a, width, a);  
  }
  </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>
  float a = 100;
  
  void setup() 
  {
    size(200, 200);
    stroke(255);
    frameRate(30);
  }
  
  void draw() 
  {
    background(51);
    a = a - 1;
    if (a &lt; 0) { 
      a = height; 
    }
    line(0, a, width, a);  
  }</pre>
  </body></html>
  


(C) Æliens 20/2/2008

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