Thread: GL11 quad not showing in LWJGL Display

I'm currently having a problem with my Display not showing my GL11 code to draw text.

I have created a custom code that generates a rectangle location to display text in png files (a-z,A-Z,1-0,!-?), and I have run into an issue where I have the text generated through the rectangle class through to creating each letter in a separate class/object that creates each letter generated, and continues drawing them back so that they keep displaying.

Here is the code for the letters (with some parts taken out):

 private static final 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','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'}; private static final char others[] = {'!','@','#','$','%','^','&','*','(',')','-', '_','+','=','[',']','{','}',';',':','\"',',','.','?','\'','<','>','/',' '};   // text search variables private int letterIndex; private boolean letterFound; // checks if letter is found private boolean otherFound; private char letterThis;   // letter draw tools private FileInputStream letterFile; private Texture letterTex;   // letter position private int letterX; private int letterY; private int letterWidth; private int letterScale;   // letter color and opacity variables private float red; private float green; private float blue; private float opacity;   // creates a letter texture for drawing public LetterList(char letter) { letterWidth = 0; initOpenGL(); /************************************************ * search alphabet ***********************************************/ letterFound = false;   for (int c = 0; c < alphabet.length; ++c) { if (alphabet[c] == letter) { letterFound = true; letterIndex = c; letterThis = alphabet[c]; letterWidth = 17+letterScale; // if the letter is wider if (letter == 'M' || letter == 'N' || letter == 'W' || letter == 'w' || letter == '4') letterWidth = 19+letterScale; break; } // if } // for loop   if (letterFound) { try { // checks if letter is a capital if (letterIndex < 26) { letterFile = new FileInputStream("textfonts/cap" + alphabet[letterIndex] + ".png"); } else { letterFile = new FileInputStream("textfonts/" + alphabet[letterIndex] + ".png"); } // if - else character search // loads texture letterTex = TextureLoader.getTexture("PNG",letterFile); } catch (FileNotFoundException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } // try - catch FileNotFoundException catch (IOException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } // } // if letter was found else { /****************************************************************** * if alphabet is not found, search for special characters ******************************************************************/ otherFound = false;   for (int c = 0; c < others.length; ++c) { if (others[c] == letter) { otherFound = true; letterIndex = c; letterThis = others[c]; letterWidth = 17+letterScale; break; } // if } // for loop   if (otherFound) { searchSpecialCharacters(others[letterIndex]); } else { // throws an exception if character is not in list try { throw new IllegalCharacterException(letter); } catch (IllegalCharacterException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } // try - catch IllegalCharacterException } // else IllegalCharacterException(char) } // else if letter was not found } // LetterList() constructor   /*********************************************************************************** * * @param letter * checks for characters that are not found in the alphabet array * **********************************************************************************/ private void searchSpecialCharacters(char letter) { try { switch (letter) { /* goes through case statements to find special characters */ } // switch (letter) // loads texture letterTex = TextureLoader.getTexture("PNG",letterFile); } catch (FileNotFoundException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } // try - catch FileNotFoundException catch (IOException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } // try - catch IOException } // searchSpecialCharacters(char)   public void drawLetter(int x, int y,int color, int fontScale) { letterX = x; letterY = y; letterScale = fontScale;   setColor(color); keepDrawingLetters(); // draws letter on creation   } // drawLetter()   // draws constantly in TextBoxRect after letter is created public void keepDrawingLetters() { GL11.glColor4f(red, green, blue, opacity); // bind logo image to screen letterTex.bind(); // draw quad screen GL11.glBegin(GL11.GL_QUADS); GL11.glTexCoord2f(0, 0); // standard texture position GL11.glVertex2f(letterX, letterY); GL11.glTexCoord2f(1, 0); // standard texture position GL11.glVertex2f(letterX+16+letterScale, letterY); GL11.glTexCoord2f(1,1); // standard texture position GL11.glVertex2f(letterX+16+letterScale, letterY+32+letterScale); GL11.glTexCoord2f(0, 1); // standard texture position GL11.glVertex2f(letterX, letterY + 32 + letterScale); GL11.glEnd(); } // keepDrawingLetter()   private void initOpenGL() { GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); GL11.glOrtho(0, 800, 0, 600, 1, -1); GL11.glMatrixMode(GL11.GL_MODELVIEW);   // enable texture mode in 2D GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA); } // initOpenGL()   } // Letter class

I solved this problem myself. Apparently I should've called "opacity = 1" in the constructor, because now it works fine.