tentacles.pde

//changed from https://www.openprocessing.org/sketch/126679

int sizeX = 500;
int sizeY = 500;
int number=1;
int count = 15;
float inc = 1;

Tentacle[] tentacles; 

//MAIN METHODS------------------------------------------------------
void setup(){
  size(1000,1000,P2D);
  smooth();
  noFill();
//  fill(random(255),random(50, 100),random(255));
fill(255);
    
  begin();
  
}

void draw(){
  
  background(0, 0);
  inc -= 0.1;
  for(int i=0;i<count;i++){
    tentacles[i].drawTentacle();
  }
}

  void keyPressed(){
  if(key == 's'){
    println("Saving...");
    save("tentacle" + number + ".png");
    println("Done saving.");
    number++;
  }

}

//METHODS------------------------------------------------------------
void begin(){
  tentacles = new Tentacle[count];
  for(int i=0;i<count;i++){
    tentacles[i] = new Tentacle();
  }
}

void mousePressed(){
  if(mouseButton==RIGHT){
    begin();
  }
}

//OBJECTS------------------------------------------------------------
class Tentacle{
  float[] a = new float[3];
  float[] b = new float[3];
  float[] c = new float[3];
  float tLength;
  float stepSize;
  float tRotate;
  int   alpha;
  
  Tentacle(){
    for(int i=0;i<3;i++){
      a[i] = random(0.005,0.03);
      b[i] = random(0,TWO_PI);
      c[i] = random(2,50); 
    }
   tRotate = random(radians(360));
// tRotate = random(250,400);
    float scale = cos(random(radians(360))+HALF_PI)+2; // last number here can change general length
    tLength = height*random(0.1,0.1)*scale; //and this one somehow too
    stepSize = 5;
//    alpha = int(random(30,100));// used for stroke weight
  }
  
  void drawTentacle(){
    float x,y;
    x = 0;
    pushMatrix();
    translate(width/2,height/2);
    rotate(tRotate); // get rid of this if you want them pointing in one general direction
 //  rotate(-PI/2); //this one points it upwards
//    stroke(100,alpha);
    noStroke();

    while(x<tLength){
      float r = map(x,0,tLength,20,1); //second to last number - makes base of tentacles thicker, changing the last number here makes tentacles less pointy 
      float A = map(x,0,tLength,0,2); //changing the last number here makes tentacles much floppier but might become just circles
     y = (sin(a[0]*x+b[0]+inc)*c[0] + sin(a[1]*x+b[1]+inc)*c[1] + sin(a[2]*x+b[2]+inc)*c[2]); //adding to this makes them longer and straighter and more circley
     y = y*A;
      ellipse(x,y,r,r);
 //     if(r>15)
      stepSize = r/5; //circleness
      x += stepSize;
    }
// tRotate = tRotate+0.005;
    popMatrix();
  
  }
 
}