Generative Art - Sunflower - Seed

sunflower_seed.pde

class SunflowerSeed {
  PVector position;
  float n1 = 1;
  float n2 = 1;
  float n3 = 1;
  float m = 1;
  float a = 1;
  float b = 1;
  float t = 0;

  SunflowerSeed(float tempN1, float tempN2, float tempN3, float tempM) {
    n1 = tempN1;
    n2 = tempN2;
    n3 = tempN3;
    m = tempM;
  }

  void toUpdateShape(float tempX, float tempY) {
    int radius = 10;
    int total = 200;
    float increment = TWO_PI / total; // Higher the total, smoother the line

    translate(tempX, tempY);
    beginShape();

    for (float angle = 0; angle < TWO_PI; angle += increment) {
      float r = supershape(angle);
      float deformedShape = 0.6;
      
      position = new PVector(radius * deformedShape * r * cos(angle), radius * r * sin(angle));
      vertex(position.x, position.y);
    }
    endShape();
  }

  float supershape(float theta) {
    // supershape() receives an angle and needs to return back r
    // The formula is coming from http://paulbourke.net/geometry/supershape/
    // Theta represents an angle

    float part1 = (1 / a) * cos(theta * m / 4);
    part1 = abs(part1);
    part1 = pow(part1, n2); // raise to an exponent

    float part2 = (1 / b) * sin(theta * m / 4);
    part2 = abs(part2);
    part2 = pow(part2, n3); // raise to an exponent

    float part3 = pow(part1 + part2, 1 / n1);

    if (part3 == 0) {
      return 0;
    }

    return (1 / part3);
  }
}