Hello. I have a sketch here, that gets the coordinates of the vertices of an imported 3d object (Wavefront , obj., exported with cinema 4d) and places a random letter.
Now i want to rotate each Letter around its y-axis.
Can anyone help me with that?

BTW: Is there a better way to place letters in space than that?

thx


import saito.objloader.*;
import processing.opengl.*;

OBJModel model;
float rotX = 0;
float rotY = 0;
float transY;
float transX;
Vertex myVert;
PFont  fontA;
float x;
float y;
float z;
float[] xCoords;
float[] yCoords;
float[] zCoords;
int letter;
char[] alphabet = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T'
,'U','V','W','X','Y','Z','&','$','!','@','1','2',
'3','4','5','6','7','8','9','0'};
char[] alphabet2 = new char[40];

void setup ()
{
  size(900, 900, OPENGL);
  frameRate(30);
  model = new OBJModel(this);
  model.load("test.obj"); // test.obj in data folder
  fontA = loadFont("UniversLTStd.vlw");
  textFont(fontA, 6);
  background(51);
  noStroke();
  lights();
  calculateLetter();
  for(int k = 0; k<40; k++)
  {
    alphabet2[k] = alphabet[int(random(39))];
  }
 
 
}

void draw()
{
  background(51);
  noStroke();
  lights();
 
  /*pushMatrix();
  translate(width/2, height/2, 0);
 
  scale(0.5);
  model.drawMode(POLYGON);
  model.draw();
  popMatrix();
 */
  pushMatrix();
  translate(transX, height/2, transY);
  scale(2);
  rotateX(-rotY);
  rotateY(-rotX);
  drawLetter();
  popMatrix();
 
}


void mouseDragged()
{
 if(key == 'c'){
  transX -= (mouseY - pmouseY) * 0.5;
  transY += (mouseX -pmouseX) * 0.5;
 }
 else{
  rotX += (mouseX - pmouseX) * 0.01;
  rotY -= (mouseY - pmouseY) * 0.01;
 }
}



void calculateLetter()
{
 xCoords = new float[model.getVertexsize()];
    yCoords = new float[model.getVertexsize()];
    zCoords = new float[model.getVertexsize()];
    for(int i = 0; i<model.getVertexsize(); i++)
    {
      xCoords[i] = model.getVertex(i).vx;
      yCoords[i] = model.getVertex(i).vy;
      zCoords[i] = model.getVertex(i).vz;
     
    }
}

void drawLetter()
{

  letter = 0;
  for(int j = 0; j<model.getVertexsize(); j++){
  letter++;
   
    if (letter >=39){letter = 0;}
    text(alphabet[letter], xCoords[j], yCoords[j], zCoords[j]);



  }
}