polygons

gistfile1.txt

void polygon(int sideCount, float radius) {

  float theta = 0.0;
  float x = 0.0;
  float y = 0.0;
  float R = random(255);
  float G = random (255);
  float B = random (255);
  
  beginShape();
  stroke(R, G, B);
  if(sideCount % 3 == 0){
    fill(R, G, B);
  } else {
    noFill();
  }
  for (int i=0; i<sideCount; i++) {
    x = cos(theta)*radius;
    y = sin(theta)*radius;
    vertex(x, y);
    theta += TWO_PI/sideCount;
  }
  endShape(CLOSE);
} // end polygon

void setup() {
  float R = random(255);
  float G = random (255);
  float B = random (255);
  size(800, 800);
  setGradient(width/2, 0, width/2, height, color(R, G, B), color(R, G, B), 2);
  int polyCount = 1500;
  noFill();
  int sideCount = 0;
  float radius = 0.0;
  float rotation = 0.0;
  
  for (int i=0; i<polyCount; i++) {
    sideCount = int(random(3, 15));
    radius = random(2, 20);
    rotation = random(TWO_PI);
    pushMatrix();
    translate(random(width), random(height));
    rotate(rotation);
    polygon(sideCount, radius);
    popMatrix();
  }
}

void setGradient(int x, int y, float w, float h, color c1, color c2, int axis ) {

  noFill();

  if (axis == 1) {  // Top to bottom gradient
    for (int i = y; i <= y+h; i++) {
      float inter = map(i, y, y+h, 0, 1);
      color c = lerpColor(c1, c2, inter);
      stroke(c);
      line(x, i, x+w, i);
    }
  }  
  else if (axis == 2) {  // Left to right gradient
    for (int i = x; i <= x+w; i++) {
      float inter = map(i, x, x+w, 0, 1);
      color c = lerpColor(c1, c2, inter);
      stroke(c);
      line(i, y, i, y+h);
    }
  }
}