Particles moving (creating a word and expanding) using the position of the mouse

derienkun

Hi guys. Im quite new at this. I found this code that creates a number of particles which automatically expand and contracts forming a word, in this case the word is “real”. Now, what I would love it to do is to expand and contract not automatically and randomly, but using the position of the mouse. So, if the mouseY is down the screen all the particles are spread all over the canvas, but if the mouseY is up in the screen, all the particles contract and form the word “real”. If you could help me I would be eternally grateful.

Thanks!

color c = color(1);//the secret colour
String word = "real";
String allwords ="real";
PVector start  =new PVector(10, 60);
int tSize =500; //Textsize
ArrayList<particle> Points = new ArrayList<particle>();
int index=0;
float restZ=0;
int F = 0;
float CTime=150;//number of frames between words
int PNum =6000;//number of particles
void setup() {
  size(1450, 850);
  frameRate(100);
  background(0);
  textSize(tSize);
  fill(0);
  text(word, start.x, start.y+tSize); //writing invisible text
  loadPixels(); //saving all pixels of the sketch
  for (int i = 0; i < PNum; i++) {//creating the particles
    Points.add(new particle(random(width), random(height)));
  }
}

void draw() {
  background(0);
  int Len = word.length();
  PVector RealPix;
  if (restZ==0) {//when the timer for the word runs out
    restZ=CTime;
    for (particle P : Points) {//resetting particles and slowing them down
      P.target=false;
      P.velocity.mult(1);
    }
    String[] Arr = allwords.split(" ");
    word=Arr[F];//getting the next word
    start.x = int(random(0, width-word.length()*tSize/1.45));
    start.y = int(random(0, height-tSize*1.3));//positioning text inside the window
    fill(c);
    text(word, start.x, start.y+tSize);
    loadPixels();
    F++;
    if (F>=Arr.length) {
      F=0;
    };
  } else if (restZ<=1) {//slowing down on the last 4 frames
    for (particle P : Points) {
      P.velocity.mult(1.5);
    }
  }
  restZ-=1;
  for (int i = 0; i < 13*PNum/(CTime-30); i++) {//checking random points in the area of the text
    RealPix=  new PVector(int(random(start.x, start.x+Len*tSize/1.45)), int(random(start.y, start.y+tSize*1.3)));
    int pixNr =int(RealPix.y*width + RealPix.x);
    color b= pixels[pixNr];
    if ((c == b)&&(restZ<CTime-20)&&(restZ>=10)) {//if the point is on text
      particle Aktuell = Points.get(index);
      if (Aktuell.target==false) {
        Aktuell.target=true;
        PVector desired = PVector.sub(RealPix, Aktuell.location);
        desired.div(restZ);
        Aktuell.velocity= desired;//kicking the particle in the direction of the point
      }
      index++;
      index=index%PNum;
    }
  }
  runP();//simulating and drawing the particles
}

void runP() {
  for (particle P : Points) {
    stroke(255, 255, 255, 128/sqrt(P.velocity.mag()+1));
    P.location.add(P.velocity);
    line(P.location.x, P.location.y, P.location.x+P.velocity.x, P.location.y+P.velocity.y);
  }//drawig particles as lines for a smoother look
}

class particle {
  PVector location;
  PVector velocity;
  boolean target=false;
  particle(float x, float y) {
    location = new PVector(x, y);
    velocity = new PVector(0.0, 0.0);
  }
}

_vk

The code as it is posted is unreadable.

see:

https://forum.processing.org/two/discussion/8045/how-to-format-code-and-text#latest

and format your code for better help ;)

koogs

(I do wonder what people are doing after submitting questions that they don't look at what they've just posted, realise it looks a complete mess and fix it)