SHUAIBAOLE.pde

/* Template
   Bronze exercise
   Lab 07 - COMP 1010
   
   Draw a spiral in the canvas that rotates
*/
  float aa = 0;
  float bb = 0;
  float cc = 0;
final int NUM_LINES = 500;  //How many lines are drawn to make the spiral
float maxRadius;            //Distance to the corners of the window (needs width/height)
final int NUM_TURNS = 10;   //How many times around to get to that size
float startAngle = 0;       //The angle to use to start the spiral
final float START_ANGLE_CHANGE = 0.000004; //Change in startAngle each frame

void setup() {
  size(500, 500);
  maxRadius = sqrt(sq(width/2)+sq(height/2)); //Distance to the corners from the centre
}

void draw() {
  linecolor ();
  background(255);
  float Xbef = width/2;
  float Ybef = height/2;
  float Xnex;
  float Ynex;
  float r = 0;
  float angle = 0;
  
  
 
    for(int i = 0; i <=NUM_LINES; i++){
     Xnex = width/2+r*cos(angle); 
     Ynex = height/2+r*sin(angle);
     //stroke(aa,bb,cc);
     //stroke(random(255),random(255),random(255));
     line(Xbef,Ybef,Xnex,Ynex);
     
     Xbef = Xnex;
     Ybef = Ynex;
     
     angle = i*(NUM_TURNS*TWO_PI/(NUM_LINES-1)+startAngle);
     startAngle = startAngle + START_ANGLE_CHANGE;
     r = r+1;
    }
  //linecolor();
}

void linecolor () {
    aa = (aa + 1)%255;
  if(aa >= 120 && aa <= 200){
   bb  = ((bb+1)*3)%255; 
  }
  
  cc = random(255);
println("aa: "+aa + ", bb: " + bb + ", cc :" + cc );
  
  
  
}