topical media & game development
[] 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) _

talk show tell print

#javascript-processing-example-topic-drawing-pattern.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>Pattern</h2>
  
  <p>Move the cursor over the image to draw with a software tool 
  which responds to the speed of the mouse.</p>
  
  <p><a href="http://processing.org/learning/topics/pattern.html"><b>Original Processing.org Example:</b> Pattern</a><br>
  <script type="application/processing">
  void setup()
  {
    size(200, 200);
    background(102);
    smooth();
  }
  
  void draw() 
  {
    // Call the variableEllipse() method and send it the
    // parameters for the current mouse position
    // and the previous mouse position
    variableEllipse(mouseX, mouseY, pmouseX, pmouseY);
  }
  
  // The simple method variableEllipse() was created specifically 
  // for this program. It calculates the speed of the mouse
  // and draws a small ellipse if the mouse is moving slowly
  // and draws a large ellipse if the mouse is moving quickly 
  
  void variableEllipse(int x, int y, int px, int py) 
  {
    float speed = abs(x-px) + abs(y-py);
    stroke(speed);
    ellipse(x, y, speed, speed);
  }
  </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(102);
    smooth();
  }
  
  void draw() 
  {
    // Call the variableEllipse() method and send it the
    // parameters for the current mouse position
    // and the previous mouse position
    variableEllipse(mouseX, mouseY, pmouseX, pmouseY);
  }
  
  // The simple method variableEllipse() was created specifically 
  // for this program. It calculates the speed of the mouse
  // and draws a small ellipse if the mouse is moving slowly
  // and draws a large ellipse if the mouse is moving quickly 
  
  void variableEllipse(int x, int y, int px, int py) 
  {
    float speed = abs(x-px) + abs(y-py);
    stroke(speed);
    ellipse(x, y, speed, speed);
  }</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

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.