Hello and merry christmas good people,

I'm using the Public Pixel Matrix library from mr. Patrick Borgeat, and I'm trying to replicate a video he posted on YouTube. This library stores boolean matrices (2d arrays) for displaying basic patterns in a small grid. This particular example displays the same grid on 3D space with a certain number of duplicates behind it (determined by length and Iterator). These are my problems:


1-  What is the syntax string for calling a file within my computer directory?

   readFromDirectory("XXX")

2- I can't make the shapes on every draw() command to suit my mouseX and mouseY rotation numbers established in mouseDragged(), I don't know why. It probably has to do with the reset thing that happens on every draw(), but I don't know how to bypass this.

3- I also can't seem to fill the "mat1" 2D array with random boolean values, because when I use it to display a matrix it only shows for true.


<sup>import processing.opengl.*;
import de.cappelnord.ppm.*;

int dim;
int size = 24;

Iterator it;

float drehI = 0.0;

PPMatrix m1;
PPMatrix m2;
PPMatrix m3;

PPMatrixList list;

boolean[][] mat1;
boolean[][] mat2;
boolean[][] mat3;

PPMatrix[] history;

final static int NUM = 6;

float rotx = PI/4;
float roty = PI/4;


void setup()
{
 dim = PublicPixelMatrix.DIM;
 size(1024, 576, OPENGL);
 frameRate(25);
 smooth();

 mat1 = new boolean[dim][dim];
 mat2 = new boolean[dim][dim];
 mat3 = new boolean[dim][dim];

 for(int i=0; i<dim; i++) {
   for(int j=0; j<dim; j++) {
     if (random(2) == 1) {
       boolean bool =  random(2) <= 0 ? false : true;
       mat1[j][i] = bool;
     }
   }
 }
 arrayCopy(mat1, mat2);
 arrayCopy(mat2, mat3);

 m1 = new PPMatrix(1249422542, mat1);
 m2 = new PPMatrix(1249422543, mat2);
 m3 = new PPMatrix(1249422544, mat3);

 list = new PPMatrixList();
 list.add(m1);
 list.add(m2);
 list.add(m3);
 //list = PublicPixelMatrix.readPPMatrixListFromURL("");  

 it = list.iterator();

 history = new PPMatrix[NUM];


}

void draw()
{   }

void mousePressed() {
 rotateX(rotx);
 if(it.hasNext())
 {
   background(0);
   noStroke();
   
   PPMatrix matrix = (PPMatrix) it.next();

   for(int i = history.length - 2; i >= 0; i--)
   {
     history[i+1] = history[i];
   }
   history[0] = matrix;

   pushMatrix();
   translate(width/2, height / 2 - ((dim * size) / 2));

   drehI  = drehI + 0.011;
   rotateX(rotx);
   rotateY(roty);    //rotateY( PI + (sin(drehI) * (PI/4)));
   translate(-((dim * size) / 2),0);
   
   for(int i = 0; i < history.length; i++)
   {
     if(history[i] != null)
     {
       pushMatrix();
       translate(0,0,i*-80 );

       float alpha = 255 - (((float) i / (float) history.length) * 220);
       
       for(int y = 0; y < dim; y++)
       {
         for(int x = 0; x < dim; x++)
         {  
           fill(0,history[i].get(x,y) ? 0 : 255,0, alpha);
           rect(x * size, y * size, size , size);
           
         }
       }  

       popMatrix();
     }  
   }
   popMatrix();  

   fill(255);
   // text(matrix.getFormattedDate(),20,34);
   // saveFrame("frame####.png");
 }      
}

void mouseDragged() {
 float rate = 0.01;
 rotx += (pmouseY-mouseY) * rate;
 roty += (mouseX-pmouseX) * rate;
}</sup>