// Experiments with text and Strings

// Global variables
PFont [] fonts;
int currentFont; // index of some array element
String myText; // Text to be displayed

// Track where text is drawn
int xPos;
int yPos;
int distance = 0;

int oldR;
int oldG;
int oldB;

void setup()
{
  size(400, 400, P3D);
  fonts = new PFont[4];
  fonts[0] = createFont("Ageoneserif", 24, true);
  fonts[1] = createFont("AmericanTypewriter", 48, false);
  fonts[2] = createFont("Apple-Chancery", 36, true);
  fonts[3] = createFont("Wingdings2", 56, true);
  currentFont = 0;
  myText = "A long time ago\nin a galaxy far, far away\nit was a dark time\nfor the Rebellion";
  xPos = width/2;
  yPos = height/2;
  
  fill(170, 200, 180);
  frameRate(10);
}

void draw()
{
  background(10);

  pushMatrix(); // Save old values  
  ellipse(350, 250, 75, 75);
  popMatrix(); // restore old values
  
  pushMatrix();
  textFont(fonts[currentFont]);
  translate(width/2, height/2, distance); // Shift origin to center
  rotateX(radians(25));
  rotateY(radians(-1*mouseX));
  rotateZ(radians(-1*mouseY));
  textAlign(CENTER);
  text(myText, 0, yPos);
  
  yPos -= 1;
  distance = distance - 1;
  
  if (distance < -100)
  {
    distance = -100;
  }
  
  if (yPos < (0 - 2 * textWidth(myText)))
  {
    yPos = height/2;
  }
  popMatrix();
}

void mousePressed()
{
  currentFont += 1; // Increase currentFont by 1
  
  if (currentFont >= fonts.length) // stay inside array
  {
    currentFont = 0;
  }
  
  fill(mouseX/2, 200, mouseY/2);
}

void keyPressed()
{
  String newText = myText + key; // Get key that was pressed
  
  // If text is too long, cut off the first character
  if (newText.length() > 200) 
  {
    newText = newText.substring(1, newText.length());
  }
  
  myText = newText;
}