the PVector class

doner21

Hi guys im trying to understand how the PVector class works interms of adding vectors

so far I saw this in shifams book

class PVector {
  float x;
  float y;
  PVector(float x_, float y_) {
    x = x_;
    y = y_;
  }

  void add(PVector v) {
    y = y + v.y;
    x = x + v.x;
  }
} 

ive written this just to see if this actually does work but get errors im trying figure out how the methods work in draw. im aslo trying to understand OOB as well so perhaps im missing something here

PVector vector ;

void setup(){  
  size(200,200);
 vector = new PVector(1,2);
}

void draw(){
  vector.add(0,1);// referencing x , y
}

class PVector(){

 float x;
 float y;

PVector(float x_,float y_){
   x = x_;
   y = y_;
   }

  void add(PVector v){
    x = x + v.x;
    y = y + v.y;
    print(x,y);
  }
}

koogs

how old is that tutorial?

PVector is a built-in class now, probably best not to have your own class with the same name

http://processing.org/reference/PVector.html

doner21

im just interested in seeing how the methods and constructor for this class are built you see if anyone point out how the method add(PVector v) is built that would be great

quark

You can see the source code for PVector here

doner21

thanks dude!