topical media & game development
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graphic-processing-site-examples-Basics-Math-Sine-Sine.pde / pde
Sine. Smoothly scaling size with the sin() function. 

  
   
  float spin = 0.0; 
  float diameter = 84.0; 
  float angle;
  
  float angle_rot; 
  int rad_points = 90;
  
  void setup() 
  {
    size(200, 200);
    noStroke();
    smooth();
  }
  
  void draw() 
  { 
    background(153);
    
    translate(130, 65);
    
    fill(255);
    ellipse(0, 0, 16, 16);
    
    angle_rot = 0;
    fill(51);
  
    for(int i=0; i<5; i++) {
      pushMatrix();
      rotate(angle_rot + -45);
      ellipse(-116, 0, diameter, diameter);
      popMatrix();
      angle_rot += PI*2/5;
    }
  
    diameter = 34 * sin(angle) + 168;
    
    angle += 0.02;
    if (angle > TWO_PI) { angle = 0; }
  }
[] 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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