topical media & game development
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graphic-processing-site-examples-Basics-Transform-Rotate-Rotate.pde / pde
Rotate. Rotating a square around the Z axis. To get the results you expect, send the rotate function angle parameters that are values between 0 and PI*2 (TWO_PI which is roughly 6.28). If you prefer to think about angles as degrees (0-360), you can use the radians() method to convert your values. For example: scale(radians(90)) is identical to the statement scale(PI/2). 

  
   
  void setup()
  {
    size(200,200);
    noStroke();
    fill(255);
    frameRate(30);
  }
  
  float angle;
  float cosine;
  float jitter;
  
  void draw()
  {
    background(102);
    
    if(second()%2 == 0){
      jitter = (random(-0.1, 0.1));
    }
    angle = angle + jitter;
    cosine = cos(angle);
    
    translate(width/2, height/2);
    rotate(cosine);
    rectMode(CENTER);
    rect(0, 0, 115, 115);   
  }
[] 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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