jelly-roll/ParticleLeft.pde at master · adithepnarula/jelly-roll · GitHub

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class ParticleLeft{

   PVector location;
   PVector velocity;
   PVector acceleration;
   float lifespan;
   float mass = 1;
  // PImage particleImage;
    int red = (int)random(50,250);
    int green = 10;
    int blue = (int)random(50,250);

  ParticleLeft(PVector l){

    acceleration = new PVector();
    velocity = new PVector(random(4,3), random(-5.5,0));
    location = l.get();
    lifespan = 255;

  }


  void run(){

    update();
    display();
  }

  void update(){
    velocity.add(acceleration);
    location.add(velocity);
    acceleration.mult(0);
    lifespan-=2.5;
  }

  void display(){

     float theta = map(location.x,0,width,0,TWO_PI * 2);

     pushMatrix();
     translate(location.x,location.y);
     rotate(theta);
     fill(red,green,blue,lifespan);
     noStroke();
     rect(0,0,8,8);
     popMatrix();

  }


   boolean isDead(){

    if(lifespan<0.0){
      return true;
    }
    else{
      return false;
    }


  }


  void applyForce(PVector force){

    PVector f = force.get();
    f.div(mass);
    acceleration.add(f);


  }


}