Generative art experiment 2: Pinkchalk spiral

January 12, 2012

float oldx = -999;
float oldy = -999;
float x;
float y;
int colour = 0;

void setup ()
{
  smooth();
  size (600, 600);

  drawit ();
}

void drawit ()
{
  background(155);
  oldx = -999;
  oldy = -999;
  colour = 0;
  int spirals = floor(random(500));
  println("drawing" + spirals);
  for (int i = 0; i < spirals; i++)
  {

    stroke (colour, 0, random(colour), 10);
    strokeWeight(random(i / 10));
    spiral ();
    colour+=255/spirals;
  }
}

void spiral ()
{
  float variance = random(360);
  float angle = variance;
  float r = 0;
  float endangle = random(1500) + variance;
  float inc = random (1.6) - 0.8;
  while (abs(angle) < endangle)
  {

  x = cos(radians(angle)) * r + random(10);
  y = sin(radians(angle)) * r + random(10);
  if (abs(oldx) > -999)
  {
    line (x + width/2, y+ height/2, oldx + width/2, oldy + height/2);
  }
  oldx = x + cos(radians(angle));
  oldy = y + sin(radians(angle));
  angle+=inc;
  r+=.1;
}
}
void draw () 
{
}
void keyPressed () 
{

  if (keyCode == DOWN)
  {
    drawit ();
  }
  if (keyCode == RETURN || keyCode == ENTER)
  {
    saveFrame ("frame-####.tiff");
  }
}