I want to display ID of an object in its centre

Answers

• koogs

  June 2016

  add up all the x and y coordinates, divide by the count to give you the centre of the shape.

  post a runnable example.
• xweet

  June 2016

  i have center location nucleus.add(space[i].nodes[i].pos); but i want to display number or string inside it.
• xweet

  June 2016 edited June 2016

  //nucleus is the centre of the niche
  
  class Nucleus {
  
    int id;
    PVector pos;
    PVector nucleus = new PVector();
    boolean frozen;
  
    Nucleus(int identity, boolean hunger, PVector loc) {
      id = identity;
      pos = loc.get();
    }
  
    void run() {
      updatePos();
      render();
    }
  
    void updatePos() {
  //   println(id, "current pos", pos);
      nucleus = new PVector();
      for (int i=0; i<space.length; i++) {
        if (space[i].ref == id) {
          for (int j=0; j<space[i].nodes.length; j++) {
            nucleus.add(space[i].nodes[i].pos);
          }
        }   
      }
      nucleus.div(numNodes);
  // println("current nucleus", nucleus);
  //   float d = pos.dist(nucleus);
  //    if (d == 0) {
  //      frozen = true;
  //      println("FROZEN .........!!!!!!!!!!!!!!!");
  //    }
      pos = nucleus;
  //    println(id, "new pos", pos);
    }
  
    void render() {
      stroke(200, 70);
  //    stroke(250, 50);
      noFill();
      ellipse(pos.x, pos.y, 8, 8);
      stroke(10);
      point(pos.x, pos.y);
    }
  }
  
• Chrisir

  June 2016 edited June 2016

  • for ellipse() you can change the meaning of the parameters with ellipseMode

  • for text() you can change it with textAlign. e.g textAlign(CENTER,CENTER); or textAlign(LEFT);

  so

  void render() { 
  
      stroke(200, 70); 
      // stroke(250, 50); 
      noFill(); 
      ellipse(pos.x, pos.y, 8, 8); 
      stroke(10); 
      point(pos.x, pos.y); 
  
      fill(0); 
      textAlign(CENTER,CENTER);
      text(id,pos.x, pos.y); 
  }