topical media & game development

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) _

#javascript-processing-example-basic-math-sinecosine.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>SineCosine</h2>
  
  <p>Linear movement with sin() and cos(). 
  Numbers between 0 and PI*2 (TWO_PI which is roughly 6.28) 
  are put into these functions and numbers between -1 and 1 are 
  returned. These values are then scaled to produce larger movements.</p>
  
  <p><a href="http://processing.org/learning/basics/sinecosine.html"><b>Original Processing.org Example:</b> SineCosine</a><br>
  <script type="application/processing">
  int i = 45;
  int j = 225; 
  float pos1 = 0; 
  float pos2 = 0; 
  float pos3 = 0; 
  float pos4 = 0;
  int sc = 40;
  
  void setup() 
  {
    size(200, 200);
    noStroke();
    smooth();
  }
  
  void draw() 
  {
    background(0);
    
    fill(51);
    rect(60, 60, 80, 80);
  
    fill(255);
    ellipse(pos1, 36, 32, 32);
  
    fill(153);
    ellipse(36, pos2, 32, 32);
  
    fill(255);
    ellipse(pos3, 164, 32, 32);
  
    fill(153);
    ellipse(164, pos4, 32, 32);
  
    i += 3;
    j -= 3;
  
    if(i > 405) {
      i = 45;
      j = 225;
    }
  
    float ang1 = radians(i); // convert degrees to radians
    float ang2 = radians(j); // convert degrees to radians
    pos1 = width/2 + (sc * cos(ang1));
    pos2 = width/2 + (sc * sin(ang1));
    pos3 = width/2 + (sc * cos(ang2));
    pos4 = width/2 + (sc * sin(ang2));
  }
  </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 i = 45;
  int j = 225; 
  float pos1 = 0; 
  float pos2 = 0; 
  float pos3 = 0; 
  float pos4 = 0;
  int sc = 40;
  
  void setup() 
  {
    size(200, 200);
    noStroke();
    smooth();
  }
  
  void draw() 
  {
    background(0);
    
    fill(51);
    rect(60, 60, 80, 80);
  
    fill(255);
    ellipse(pos1, 36, 32, 32);
  
    fill(153);
    ellipse(36, pos2, 32, 32);
  
    fill(255);
    ellipse(pos3, 164, 32, 32);
  
    fill(153);
    ellipse(164, pos4, 32, 32);
  
    i += 3;
    j -= 3;
  
    if(i &gt; 405) {
      i = 45;
      j = 225;
    }
  
    float ang1 = radians(i); // convert degrees to radians
    float ang2 = radians(j); // convert degrees to radians
    pos1 = width/2 + (sc * cos(ang1));
    pos2 = width/2 + (sc * sin(ang1));
    pos3 = width/2 + (sc * cos(ang2));
    pos4 = width/2 + (sc * sin(ang2));
  }</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) _

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