How can I do a vector 2d array ?

SultanGabriel

Can I even make an 2d array of vectors, if yes, how ?

Chrisir

PVector [][] mapPVectors = new PVector[100][100];

SultanGabriel

Thanks :) @Chrisir

GoToLoop

https://forum.Processing.org/two/discussions/tagged/2darray

Chrisir

PVector [][] mapPVectors = new PVector[100][100];
int max1=100;

void setup() {
  size(700, 700);
  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {
      mapPVectors[x][y] = new PVector (5*x+19, 5*y+19);
    }
  }
}

void draw() {
  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {
      point(mapPVectors[x][y].x, mapPVectors[x][y].y);
    }
  }
  //
} 

Chrisir

there is a tutorial on 2D arrays

https://www.processing.org/tutorials/2darray/

SultanGabriel

Thanks a lot ! Again :) @Chrisir

Chrisir

replacing PVector with your own class Cell to store a color etc. in addition to the position inside the class

final int max1=100;
Cell [][] grid = new Cell[max1][max1];

void setup() {

  size(740, 740);

  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {

      color color1 = color(random(256), random(256), random(256));
      boolean exist = random(100) > 30; 
      grid[x][y] = new Cell (7*x+20, 7*y+20, color1, exist);
    }
  }
}

void draw() {
  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {

      grid[x][y].display();
    }
  }
} 

// ===================================================

class Cell {

  // Attributes
  float x;
  float y;

  float diameter  = 5;
  color cellColor=0;

  boolean exist;  

  // constructor
  Cell(float theX, float theY, 
    color theColor, 
    boolean theExist) {
    x = theX;
    y = theY;
    cellColor=theColor;
    exist=theExist;
  } // constructor

  void display() {
    if (exist) {
      fill(cellColor);
      // noStroke(); 
      rect (x, y, diameter, diameter);
    }
  }// method
  //
}//class 
//

Chrisir

and 3D grid:

it needs to be mentioned that we can do a 3D grid within a 1D array easily - so there is no connection between 3D grid (what you display) and the 3D / 1D array (the internal data structure).

Because also in a 1D array yoiu can store 3D data.

// grid in 3D 

final int max1=30;
Cell [][][] grid = new Cell[max1][max1][max1];
float angle1=0.0;

void setup() {

  size(740, 740, P3D);

  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {
      for (int z=0; z<max1; z++) {

        color color1 = color(random(256), random(256), random(256));
        float threshold =  (map(z, 0, max1, 60, 99.9)); 
        boolean exist = random(101) > threshold; 
        grid[x][y][z] = new Cell (7*x-(7*30/2), 7*y-(7*30/2), 7*z-(7*30/2), 
          color1, 
          exist);
      }
    }
  }
  noStroke();
  background(0);
}

void draw() {
  background(0);
  lights(); 

  camera(0, -69, 266, 
    0, 0, 0, 
    0, 1, 0);

  rotateY (angle1); 
  angle1+=0.01; 

  for (int x=0; x<max1; x++) {
    for (int y=0; y<max1; y++) {
      for (int z=0; z<max1; z++) {

        grid[x][y][z].display();
      }
    }
  }
}

// =========================================================

class Cell {

  // Attributes
  float x;
  float y;
  float z;

  float diameter  = 5;
  color cellColor=0;

  boolean exist;  

  // constructor
  Cell(float theX, float theY, float theZ, 
    color theColor, 
    boolean theExist) {
    x = theX;
    y = theY;
    z = theZ;
    cellColor=theColor;
    exist=theExist;
  } // constructor

  void display() {
    if (exist) {
      fill(cellColor);
      // noStroke();
      // stroke(111);
      pushMatrix();
      translate(x, y, z); 
      box(diameter);      
      popMatrix();
    }
  }// method
  //
}//class 
//