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) _

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graphic-processing-site-examples-Basics-Math-SineCosine-SineCosine.pde / pde
Sine Cosine. 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. 

  
   
  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));
  }
[] 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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