topical media & game development
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#javascript-processing-example-basic-form-trianglestrip.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>TriangleStrip</h2>
  
  <p>By Ira Greenberg 
  
  Generate a closed ring using vertex() 
  function and beginShape(TRIANGLE_STRIP)
  mode. outerRad and innerRad variables 
  control ring's outer/inner radii respectively.
  Trig functions generate ring.</p>
  
  <p><a href="http://processing.org/learning/basics/trianglestrip.html"><b>Original Processing.org Example:</b> TriangleStrip</a><br>
  <script type="application/processing">
  size(200, 200);
  background(204);
  smooth();
  
  int x = width/2;
  int y = height/2;
  int outerRad = 80;
  int innerRad = 50;
  float px = 0, py = 0, angle = 0;
  float pts = 36;
  float rot = 360.0/pts;
  
  beginShape(TRIANGLE_STRIP); 
  for (int i=0; i<pts; i++) {
    px = x+cos(radians(angle))*outerRad;
    py = y+sin(radians(angle))*outerRad;
    angle+=rot;
    vertex(px, py);
    px = x+cos(radians(angle))*innerRad;
    py = y+sin(radians(angle))*innerRad;
    vertex(px, py); 
    angle+=rot;
  }
  endShape();
  </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>
  size(200, 200);
  background(204);
  smooth();
  
  int x = width/2;
  int y = height/2;
  int outerRad = 80;
  int innerRad = 50;
  float px = 0, py = 0, angle = 0;
  float pts = 36;
  float rot = 360.0/pts;
  
  beginShape(TRIANGLE_STRIP); 
  for (int i=0; i&lt;pts; i++) {
    px = x+cos(radians(angle))*outerRad;
    py = y+sin(radians(angle))*outerRad;
    angle+=rot;
    vertex(px, py);
    px = x+cos(radians(angle))*innerRad;
    py = y+sin(radians(angle))*innerRad;
    vertex(px, py); 
    angle+=rot;
  }
  endShape();</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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