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1  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-04 22:05:33
Okay thank you, I plan on getting the red book at some point; maybe I should make some point now.
2  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-04 02:51:11
Ok yeah I'd fixed some of the nonsensical values for drawRangeElements (or so I though I had) in the latest paste of the code, but I really had no idea what to do to convert the coordinates to screen coordinates. And on a side note it works Smiley Thank you very much everyone for your help. And ihkbob do you have any recommendation for future reference for where to learn how to deal with openGL matrices?
3  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-04 01:08:04
Mm yeah I tried what I think you suggested and it still didn't work, I think I'm going to try looking at the code here: http://www.spacesimulator.net/wiki/index.php/Tutorials:OpenGL_and_Glut_(OpenGL3.3) and porting the matrix related things over.
On a side note, how do you specify the link text for a link on this forum?
4  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-03 23:39:11
So I fixed my shader compiling/linking/etc code and now glGetAttribLocation returns 0 (the first index) and the program compiles and runs without complaint, however all I'm getting right now is a screen drawn to the clearcolor.
Here's my shader loading code for anyone trying to follow in my footsteps.
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.CharBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Scanner;

import javax.media.opengl.DebugGL3;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;

public class ShaderProgram {


   int p;
   boolean valid = false;

   File vertf;
   File fragf;
   
   String []vertS = {"#version 150\nin vec3 vertex;\nvoid main()\n{\ngl_Position = vec4(vertex,1.0);\n}"};
   String []fragS = {"#version 150\nout vec4 fragmentColor;\nvoid main()\n{\nfragmentColor = vec4(0.0, 1.0, 0.0, 1.0);\n}"};
   
   public ShaderProgram(GLAutoDrawable drawable, File vertf, File fragf) {
      this.vertf = vertf;
      this.fragf = fragf;         
      DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());

      p = gl.glCreateProgram();

      int v = gl.glCreateShader(gl.GL_VERTEX_SHADER);      
      int f = gl.glCreateShader(gl.GL_FRAGMENT_SHADER);
      readAndCompileShader(v, vertf, gl);
      readAndCompileShader(f, fragf, gl);

      gl.glLinkProgram(p);       



      // check link status
      int[] query = new int[1];
      gl.glGetProgramiv(p, GL3.GL_LINK_STATUS, query, 0);
      if (query[0] == GL.GL_TRUE){
         System.out.println("P: successful"); // program linked successfully
         valid = true;
      }else{
         // link failed, read the log and return it
         gl.glGetProgramiv(p, GL3.GL_INFO_LOG_LENGTH, query, 0);
         int maxLogLength = query[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetProgramInfoLog(p, maxLogLength, query, 0, log, 0);

            valid = false;
            System.out.println(new String(log, 0, query[0]));
         } else{
            valid = false;
            System.out.println("unknown link error");
         }
      }
   }
   
   void readAndCompileShader(int shader, File sourceF, DebugGL3 gl){
      String [] source = new String[1];
      try {
         source[0] = readFile(sourceF);
      } catch (IOException e) {
         System.out.println("Could not find shader file");
      }
      source[0] = source[0].replaceAll("\r\n", "\n");
      //System.out.print(source[0]);
      
      int[] lengths = new int[]{source[0].length()};

      gl.glShaderSource(shader, 1, source, lengths, 0);        
      gl.glCompileShader(shader);
      gl.glAttachShader(p,shader);

      // query compile status and possibly read log
      int[] status = new int[1];
      gl.glGetShaderiv(shader, GL3.GL_COMPILE_STATUS, status, 0);
      if (status[0] == GL.GL_TRUE){
         System.out.println("shader: succesful");
         // everything compiled successfully, no log
      }else{
         // compile failed, read the log and return it
         gl.glGetShaderiv(shader, GL3.GL_INFO_LOG_LENGTH, status, 0);
         int maxLogLength = status[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetShaderInfoLog(shader, maxLogLength, status, 0, log, 0);

            System.out.println("shader: " + new String(log, 0, status[0]));
         } else
            System.out.println("shader: "+ "unknown compilation error");
      }
   }
   
   private static String readFile(File file) throws IOException {
        FileInputStream stream = new FileInputStream(file);
        try {
          FileChannel fc = stream.getChannel();
          MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
          /* Instead of using default, pass in a decoder. */
          return Charset.forName("UTF-8").decode(bb).toString();
        }
        finally {
          stream.close();
        }
      }
}
5  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-03 21:13:05
Yeah that doesn't change anything, still getting the same
Vertex shader(s) failed to link, fragment shader(s) failed to link.
ERROR: error(#280) Not all shaders have valid object code
ERROR: error(#280) Not all shaders have valid object code
after the shaders report compiling successfully. *sigh*
I guess I'll try updating my drivers and running it on a different computer.

EDIT:
The problem is definitely in the way I read in my shaders; hardcoding in the shaders as a string array makes everything compile fine (although I still need to figure out how to use them to draw)
6  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-03 03:42:35
vec3 is the type of the input value vertex, and it's used to set the position of the vertex.
And vec4 is saying that there is an output that has 4 pieces of data.
7  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-03 03:11:54
I thought they were correct, they look like this:
vertex shader code
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#version 150
in vec3 vertex;
void
main()
{
    gl_Position = vec4(vertex,1.0);
}

fragment shader code
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#version 150
out vec4 fragmentColor;
void
main()
{
    fragmentColor = vec4(0.0, 1.0, 0.0, 1.0);
}
8  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-03 02:17:09
Okay so I fixed my shaders by removing the trailing ;, and modified my shader reading code to use nextline and added on \n to the end of each string in the source array and that made the shaders compiled without error, however when I try to attach the shaders and compile the program it says this:

Vertex shader(s) failed to link, fragment shader(s) failed to link.
ERROR: error(#280) Not all shaders have valid object code
ERROR: error(#280) Not all shaders have valid object code

Current shader code look like this
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.Scanner;

import javax.media.opengl.DebugGL3;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;

public class ShaderProgram {

   public ShaderProgram(GLAutoDrawable drawable, File vertf, File fragf) {
      this.vertf = vertf;
      this.fragf = fragf;         
      DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());

      p = gl.glCreateProgram();

      //VERTEX STUFF
      int v = gl.glCreateShader(gl.GL_VERTEX_SHADER);

      ArrayList <String> vSourceA = new ArrayList<String>();
      Scanner vert = null;
      try {
         vert = new Scanner(vertf);
      } catch (FileNotFoundException e) {
         System.out.println("Vertex shader file was not found");
      }

      vert.useDelimiter("\n");
      while(vert.hasNextLine()){
         String temp = vert.nextLine() + "\n";
         vSourceA.add(temp);
         System.out.print(temp);
      }

      String[] vSource = new String[vSourceA.size()];
      vSource = vSourceA.toArray(vSource);
      int [] lengths= new int[vSource.length];
      for(int i = 0; i < vSource.length; i++){
         lengths[i] = vSource[i].length();
      }

      gl.glShaderSource(v, 1, vSource, lengths, 0);        
      gl.glCompileShader(v);
      gl.glAttachShader(p,v);

      // query compile status and possibly read log
      int[] status = new int[1];
      gl.glGetShaderiv(v, GL3.GL_COMPILE_STATUS, status, 0);
      if (status[0] == GL.GL_TRUE){
         System.out.println("v: succesful");
         // everything compiled successfully, no log
      }else{
         // compile failed, read the log and return it
         gl.glGetShaderiv(v, GL3.GL_INFO_LOG_LENGTH, status, 0);
         int maxLogLength = status[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetShaderInfoLog(v, maxLogLength, status, 0, log, 0);

            System.out.println("v: " + new String(log, 0, status[0]));
         } else
            System.out.println("v: "+ "unknown compilation error");
      }




      //FRAGMENT SHADER CODE
      int f = gl.glCreateShader(gl.GL_FRAGMENT_SHADER);

      ArrayList <String> fSourceA = new ArrayList<String>();

      Scanner frag = null;
      try {
         frag = new Scanner(fragf);
      } catch (FileNotFoundException e) {
         System.out.println("Fragment shader file was not found");
      }


      frag.useDelimiter("\n");
      while(frag.hasNextLine()){
         String temp = frag.nextLine() + "\n";
         fSourceA.add(temp);
         System.out.print(temp);
      }

      String[] fSource = new String[fSourceA.size()];
      fSource = fSourceA.toArray(fSource);
      lengths= new int[fSource.length];
      for(int i = 0; i < fSource.length; i++){
         lengths[i] = fSource[i].length();
      }

      gl.glShaderSource(f, 1, fSource, lengths, 0);        
      gl.glCompileShader(f);
      gl.glAttachShader(p,f);

      // query compile status and possibly read log
      status = new int[1];
      gl.glGetShaderiv(f, GL3.GL_COMPILE_STATUS, status, 0);
      if (status[0] == GL.GL_TRUE){
         System.out.println("f: succesful");
         // everything compiled successfully, no log
      }else{
         // compile failed, read the log and return it
         gl.glGetShaderiv(f, GL3.GL_INFO_LOG_LENGTH, status, 0);
         int maxLogLength = status[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetShaderInfoLog(f, maxLogLength, status, 0, log, 0);
            System.out.println("f: " + new String(log, 0, status[0]));
         } else
            System.out.println("f: " + "unknown compilation error");
      }


      //PROGRAM CODE
      gl.glLinkProgram(p);       



      // check link status
      int[] query = new int[1];
      gl.glGetProgramiv(p, GL3.GL_LINK_STATUS, query, 0);
      if (query[0] == GL.GL_TRUE){
         System.out.println("P: successful"); // program linked successfully
         valid = true;
      }else{
         // link failed, read the log and return it
         gl.glGetProgramiv(p, GL3.GL_INFO_LOG_LENGTH, query, 0);
         int maxLogLength = query[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetProgramInfoLog(p, maxLogLength, query, 0, log, 0);

            valid = false;
            System.out.println(new String(log, 0, query[0]));
         } else{
            valid = false;
            System.out.println("unknown link error");
         }
      }
   }

   int p;
   boolean valid = false;

   File vertf;
   File fragf;

}
9  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-02 06:30:23
So I got the vertex and fragment shaders to compile by taking out the extra newline char I was adding in *oops* and taking out the #version line at the top. But now I have a different problem than before with glVertexAttribPointer
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Exception in thread "Timer-0" javax.media.opengl.GLException: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glVertexAttribPointer(<int> 0xFFFFFFFF, <int> 0x3, <int> 0x1406, <boolean>, <int> 0x0, <long>): GL_INVALID_VALUE ( 1281 0x501), 
   at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
   at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
   at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
   at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:767)
   at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:388)
   at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
   at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:140)
   at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:125)
   at java.util.TimerThread.mainLoop(Unknown Source)
   at java.util.TimerThread.run(Unknown Source)
Caused by: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glVertexAttribPointer(<int> 0xFFFFFFFF, <int> 0x3, <int> 0x1406, <boolean>, <int> 0x0, <long>): GL_INVALID_VALUE ( 1281 0x501), 
   at javax.media.opengl.DebugGL3.checkGLGetError(DebugGL3.java:12595)
   at javax.media.opengl.DebugGL3.glVertexAttribPointer(DebugGL3.java:8895)
   at RealMain$JOGLRenderer.display(RealMain.java:103)
   at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:191)
   at javax.media.opengl.awt.GLCanvas$DisplayAction.run(GLCanvas.java:873)
   at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:363)
   at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:890)
   at java.awt.event.InvocationEvent.dispatch(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$000(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

current realmain code is below
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import javax.media.opengl.DebugGL3;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.glu.GLU;
import javax.swing.*;

import com.jogamp.opengl.util.FPSAnimator;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;

public class RealMain{    
   public static void main(String[] args)    {        
      JFrame frame = new JFrame("JOGL test");
      frame.setSize(640, 480);
      GLProfile glProfile = GLProfile.getDefault();
      GLCapabilities glCapabilities = new GLCapabilities(glProfile); 
      GLCanvas canvas = new GLCanvas(glCapabilities);        
      frame.add(canvas);       
      canvas.addGLEventListener(new JOGLRenderer());   
      FPSAnimator animator = new FPSAnimator(canvas, 60);   
      animator.add(canvas); 
      animator.start();       
      frame.addWindowListener(new WindowAdapter(){           
         public void windowClosing(WindowEvent e)            {  
            System.exit(0);            }        });   
      frame.setVisible(true);   
   }   
   private static class JOGLRenderer implements GLEventListener    { 
      ShaderProgram shader;
      public void init(GLAutoDrawable drawable){



         shader = new ShaderProgram(drawable, new File("bin/vert.txt"), new File("bin/frag.txt"));

         //setup opengl         
         DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());
         gl.glClearColor(0.2f, 0.2f, 0.0f, 0.0f);        
         gl.glClearDepth(1.0f);          
         gl.glEnable(GL3.GL_DEPTH_TEST);         

         // Create vertex data         
         float[] vertexData = new float[]{
               -1f, 1f, -2.0f, //0
               1f, 1f, -2.0f, //1
               -1f, -1f, -2.0f, //2
               1f, -1f, -2.0f, //3
         };
         ByteBuffer vertexByteBuffer = ByteBuffer.allocateDirect(3 * 4 * 4);            
         vertexByteBuffer.order(ByteOrder.nativeOrder());      
         FloatBuffer vertexBuffer = vertexByteBuffer.asFloatBuffer();          
         vertexBuffer.put(vertexData);

         // Create vertex buffer              
         int[] vertexBufferId = new int[1];         
         gl.glGenBuffers(1, vertexBufferId, 0);        
         gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, vertexBufferId[0]);      
         gl.glBufferData(GL3.GL_ARRAY_BUFFER, 48, (ByteBuffer)null, GL3.GL_DYNAMIC_DRAW); 
         // Load vertex data into vertex buffer         
         gl.glBufferSubData(GL3.GL_ARRAY_BUFFER, 0, vertexByteBuffer.capacity(), vertexByteBuffer);

         // Create index data           
         int[] indexData = new int[]{0, 1, 2, 3};

         ByteBuffer indexByteBuffer = ByteBuffer.allocateDirect(4 * 4);
         indexByteBuffer.order(ByteOrder.nativeOrder());
         IntBuffer indexBuffer = indexByteBuffer.asIntBuffer();
         indexBuffer.put(indexData);

         // Create index buffer     
         int[] indexBufferId = new int[1];
         gl.glGenBuffers(1, indexBufferId, 0);
         gl.glBindBuffer(GL3.GL_ELEMENT_ARRAY_BUFFER, indexBufferId[0]);          
         gl.glBufferData(GL3.GL_ELEMENT_ARRAY_BUFFER, 16, (ByteBuffer)null, GL3.GL_DYNAMIC_DRAW);       
         // Load index data into index buffer          
         gl.glBufferSubData(GL3.GL_ELEMENT_ARRAY_BUFFER, 0, indexByteBuffer.capacity(), indexByteBuffer);



      }
      public void dispose(GLAutoDrawable drawable){} 
      public void display(GLAutoDrawable drawable){         
         DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());
         gl.glClear(GL3.GL_COLOR_BUFFER_BIT | GL3.GL_DEPTH_BUFFER_BIT);       


         //gl.glMatrixMode(GL2.GL_MODELVIEW);
         //gl.glLoadIdentity();          
         int stride = 3 * 4; //3 floats per vert * 4 bytes per float

         gl.glVertexAttribPointer(gl.glGetAttribLocation(shader.p, "vertex"), 3, GL3.GL_FLOAT, false, 0, 0);

         //shader code
         gl.glUseProgram(shader.p);
         gl.glDrawRangeElements(GL3.GL_TRIANGLE_STRIP, 0, 3, 4, GL3.GL_UNSIGNED_INT, 0); //start render at 0 verts go to 3 for a count of 4
         gl.glUseProgram(0);
      }    


      public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)        {          
         GL3 gl = drawable.getGL().getGL3();     
         GLU glu = new GLU(); 
         gl.glViewport(0, 0, width, height);   
         glu.gluPerspective(45.0f, (float) width / (float) height, 0.1f, 100.0f);  
      } 
   }
}
10  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-02 03:20:47
Wow, that was super helpful, thank you very much.
So here's the code that is compiled for each shader followed by the error it produces.
Since they both give the same error I'm thinking there's something wrong with the way I'm reading in and feeding the code to openGL.
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#version 150
in vec3 vertex;
void
main()
{
    gl_Position = vec4(vertex,1.0);
}
";
v: Vertex shader failed to compile with the following errors:
ERROR: 7:2: error(#90) Syntax error ERROR___CPP_EOL_IN_STRING
ERROR: 7:2: error(#132) Syntax error: '<' parse error
ERROR: error(#273) 2 compilation errors.  No code generated

#version 150
out vec4 fragmentColor;
void
main()
{
    fragmentColor = vec4(0.0, 1.0, 0.0, 1.0);
}
";
f: Fragment shader failed to compile with the following errors:
ERROR: 7:2: error(#90) Syntax error ERROR___CPP_EOL_IN_STRING
ERROR: 7:2: error(#132) Syntax error: '<' parse error
ERROR: error(#273) 2 compilation errors.  No code generated

for reference here's my code that handles compiling the shaders (I commented out the linking related things for now)
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public ShaderProgram(GLAutoDrawable drawable, File vertf, File fragf) {
      this.vertf = vertf;
      this.fragf = fragf;         
      DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());

      p = gl.glCreateProgram();

      //VERTEX STUFF
      int v = gl.glCreateShader(gl.GL_VERTEX_SHADER);

      ArrayList <String> vSourceA = new ArrayList<String>();
      Scanner vert = null;
      try {
         vert = new Scanner(vertf);
      } catch (FileNotFoundException e) {
         System.out.println("Vertex shader file was not found");
      }

      vert.useDelimiter("\n");

      while(vert.hasNext()){
         String temp = vert.next() + "\n";
         vSourceA.add(temp);
         System.out.print(temp);
      }

      String[] vSource = new String[vSourceA.size()];
      vSource = vSourceA.toArray(vSource);
      int [] lengths= new int[vSource.length];
      for(int i = 0; i < vSource.length; i++){
         lengths[i] = vSource[i].length();
      }

      gl.glShaderSource(v, lengths.length, vSource, lengths, 0);        
      gl.glCompileShader(v);

      // query compile status and possibly read log
      int[] status = new int[1];
      gl.glGetShaderiv(v, GL3.GL_COMPILE_STATUS, status, 0);
      if (status[0] == GL.GL_TRUE){
         System.out.println("v: succesful");
         // everything compiled successfully, no log
      }else{
         // compile failed, read the log and return it
         gl.glGetShaderiv(v, GL3.GL_INFO_LOG_LENGTH, status, 0);
         int maxLogLength = status[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetShaderInfoLog(v, maxLogLength, status, 0, log, 0);

            System.out.println("v: " + new String(log, 0, status[0]));
         } else
            System.out.println("v: "+ "unknown compilation error");
      }
      //FRAGMENT SHADER CODE
      int f = gl.glCreateShader(gl.GL_FRAGMENT_SHADER);

      ArrayList <String> fSourceA = new ArrayList<String>();

      Scanner frag = null;
      try {
         frag = new Scanner(fragf);
      } catch (FileNotFoundException e) {
         System.out.println("Fragment shader file was not found");
      }


      frag.useDelimiter("\n");
      while(frag.hasNext()){
         String temp = frag.next() + "\n";
         fSourceA.add(temp);
         System.out.print(temp);
      }

      String[] fSource = new String[fSourceA.size()];
      fSource = fSourceA.toArray(fSource);
      lengths= new int[fSource.length];
      for(int i = 0; i < fSource.length; i++){
         lengths[i] = fSource[i].length();
      }

      gl.glShaderSource(f, lengths.length, fSource, lengths, 0);        
      gl.glCompileShader(f);

      // query compile status and possibly read log
      status = new int[1];
      gl.glGetShaderiv(f, GL3.GL_COMPILE_STATUS, status, 0);
      if (status[0] == GL.GL_TRUE){
         System.out.println("f: succesful");
         // everything compiled successfully, no log
      }else{
         // compile failed, read the log and return it
         gl.glGetShaderiv(f, GL3.GL_INFO_LOG_LENGTH, status, 0);
         int maxLogLength = status[0];
         if (maxLogLength > 0) {
            byte[] log = new byte[maxLogLength];
            gl.glGetShaderInfoLog(f, maxLogLength, status, 0, log, 0);
            System.out.println("f: " + new String(log, 0, status[0]));
         } else
            System.out.println("f: " + "unknown compilation error");
      }
      //PROGRAM CODE
      //gl.glLinkProgram(p);       
      //gl.glValidateProgram(p);


      valid = true;
   }
11  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-02 01:14:31
So in my ShaderProgram code I was assigning the program handle to a local variable *facepalm* but my program is still not working correctly, new error below
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Exception in thread "Timer-0" javax.media.opengl.GLException: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glGetAttribLocation(<int> 0x1, <java.lang.String>): GL_INVALID_OPERATION ( 1282 0x502), 
   at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
   at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
   at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
   at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:767)
   at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:388)
   at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
   at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:140)
   at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:125)
   at java.util.TimerThread.mainLoop(Unknown Source)
   at java.util.TimerThread.run(Unknown Source)
Caused by: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glGetAttribLocation(<int> 0x1, <java.lang.String>): GL_INVALID_OPERATION ( 1282 0x502), 
   at javax.media.opengl.DebugGL3.checkGLGetError(DebugGL3.java:12595)
   at javax.media.opengl.DebugGL3.glGetAttribLocation(DebugGL3.java:5641)
   at RealMain$JOGLRenderer.display(RealMain.java:105)
   at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:191)
   at javax.media.opengl.awt.GLCanvas$DisplayAction.run(GLCanvas.java:873)
   at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:363)
   at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:890)
   at java.awt.event.InvocationEvent.dispatch(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$000(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

This makes me think that my shader program is not compiling successfully,  but I'm not quite sure how to check that.
12  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-02 00:33:12
Yeah I got that, the error was caused by
            ByteBuffer vertexByteBuffer = ByteBuffer.allocateDirect(7 * 4 * 4);    
which should have been
            ByteBuffer vertexByteBuffer = ByteBuffer.allocateDirect(3 * 4 * 4);    
I'd forgotten to change the buffer size after I removed the color data from the vertices.

But now back to my broken shaders.
new error code is posted below:
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Exception in thread "Timer-0" javax.media.opengl.GLException: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glGetAttribLocation(<int> 0x0, <java.lang.String>): GL_INVALID_VALUE ( 1281 0x501), 
   at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
   at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
   at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
   at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:767)
   at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:388)
   at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
   at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:140)
   at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:125)
   at java.util.TimerThread.mainLoop(Unknown Source)
   at java.util.TimerThread.run(Unknown Source)
Caused by: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glGetAttribLocation(<int> 0x0, <java.lang.String>): GL_INVALID_VALUE ( 1281 0x501), 
   at javax.media.opengl.DebugGL3.checkGLGetError(DebugGL3.java:12595)
   at javax.media.opengl.DebugGL3.glGetAttribLocation(DebugGL3.java:5641)
   at RealMain$JOGLRenderer.display(RealMain.java:105)
   at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:191)
   at javax.media.opengl.awt.GLCanvas$DisplayAction.run(GLCanvas.java:873)
   at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:363)
   at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:890)
   at java.awt.event.InvocationEvent.dispatch(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$000(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

and updated code for realmain is below
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import javax.media.opengl.DebugGL3;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.glu.GLU;
import javax.swing.*;

import com.jogamp.opengl.util.FPSAnimator;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;

public class RealMain{    
   public static void main(String[] args)    {        
      JFrame frame = new JFrame("JOGL test");
      frame.setSize(640, 480);
      GLProfile glProfile = GLProfile.getDefault();
      GLCapabilities glCapabilities = new GLCapabilities(glProfile); 
      GLCanvas canvas = new GLCanvas(glCapabilities);        
      frame.add(canvas);       
      canvas.addGLEventListener(new JOGLRenderer());   
      FPSAnimator animator = new FPSAnimator(canvas, 60);   
      animator.add(canvas); 
      animator.start();       
      frame.addWindowListener(new WindowAdapter(){           
         public void windowClosing(WindowEvent e)            {  
            System.exit(0);            }        });   
      frame.setVisible(true);   
   }   
   private static class JOGLRenderer implements GLEventListener    { 
      ShaderProgram shader;
      public void init(GLAutoDrawable drawable){



         shader = new ShaderProgram(drawable, new File("bin/vert.txt"), new File("bin/frag.txt"));

         //setup opengl         
         DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());
         gl.glClearColor(0.2f, 0.2f, 0.0f, 0.0f);        
         gl.glClearDepth(1.0f);          
         gl.glEnable(GL3.GL_DEPTH_TEST);         

         // Create vertex data         
         float[] vertexData = new float[]{
               -1f, 1f, -2.0f, //0
               1f, 1f, -2.0f, //1
               -1f, -1f, -2.0f, //2
               1f, -1f, -2.0f, //3
         };
         ByteBuffer vertexByteBuffer = ByteBuffer.allocateDirect(3 * 4 * 4);            
         vertexByteBuffer.order(ByteOrder.nativeOrder());      
         FloatBuffer vertexBuffer = vertexByteBuffer.asFloatBuffer();          
         vertexBuffer.put(vertexData);

         // Create vertex buffer              
         int[] vertexBufferId = new int[1];         
         gl.glGenBuffers(1, vertexBufferId, 0);        
         gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, vertexBufferId[0]);      
         gl.glBufferData(GL3.GL_ARRAY_BUFFER, 48, (ByteBuffer)null, GL3.GL_DYNAMIC_DRAW); 
         // Load vertex data into vertex buffer         
         gl.glBufferSubData(GL3.GL_ARRAY_BUFFER, 0, vertexByteBuffer.capacity(), vertexByteBuffer);

         // Create index data           
         int[] indexData = new int[]{0, 1, 2, 3};

         ByteBuffer indexByteBuffer = ByteBuffer.allocateDirect(4 * 4);
         indexByteBuffer.order(ByteOrder.nativeOrder());
         IntBuffer indexBuffer = indexByteBuffer.asIntBuffer();
         indexBuffer.put(indexData);

         // Create index buffer     
         int[] indexBufferId = new int[1];
         gl.glGenBuffers(1, indexBufferId, 0);
         gl.glBindBuffer(GL3.GL_ELEMENT_ARRAY_BUFFER, indexBufferId[0]);          
         gl.glBufferData(GL3.GL_ELEMENT_ARRAY_BUFFER, 16, (ByteBuffer)null, GL3.GL_DYNAMIC_DRAW);       
         // Load index data into index buffer          
         gl.glBufferSubData(GL3.GL_ELEMENT_ARRAY_BUFFER, 0, indexByteBuffer.capacity(), indexByteBuffer);

         

      }
      public void dispose(GLAutoDrawable drawable){} 
      public void display(GLAutoDrawable drawable){         
         DebugGL3 gl = new DebugGL3( drawable.getGL().getGL3());
         gl.glClear(GL3.GL_COLOR_BUFFER_BIT | GL3.GL_DEPTH_BUFFER_BIT);       


         //gl.glMatrixMode(GL2.GL_MODELVIEW);
         //gl.glLoadIdentity();          
         int stride = 3 * 4; //3 floats per vert * 4 bytes per float


         
         gl.glVertexAttribPointer(gl.glGetAttribLocation(shader.p, "vertex"), 3, GL3.GL_FLOAT, false, 20, 0);
         System.out.println(gl.glGetError()); 
         
         //shader code
         gl.glUseProgram(shader.p);
         gl.glDrawRangeElements(GL3.GL_TRIANGLE_STRIP, 0, 3, 4, GL3.GL_UNSIGNED_INT, 0); //start render at 0 verts go to 3 for a count of 4
         gl.glUseProgram(0);
      }    


      public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)        {          
         GL3 gl = drawable.getGL().getGL3();     
         GLU glu = new GLU(); 
         gl.glViewport(0, 0, width, height);   
         glu.gluPerspective(45.0f, (float) width / (float) height, 0.1f, 100.0f);  
      } 
   }
}

Right now I'm looking into the fact that my string for glGetAttribLocation is not null teminated
13  Java Game APIs & Engines / OpenGL Development / Re: VBOs and Shaders in JOGL on: 2011-08-02 00:14:35
Hm, I did not know that you could do that that's neat.
So after wrapping gl with DebugGL3 it gives me this error message:
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Exception in thread "Timer-0" javax.media.opengl.GLException: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glBufferSubData(<int> 0x8892, <long>, <long>, <java.nio.Buffer>): GL_INVALID_VALUE ( 1281 0x501), 
   at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
   at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
   at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
   at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:767)
   at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:388)
   at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
   at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:140)
   at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:125)
   at java.util.TimerThread.mainLoop(Unknown Source)
   at java.util.TimerThread.run(Unknown Source)
Caused by: javax.media.opengl.GLException: Thread[AWT-EventQueue-0,6,main] glGetError() returned the following error codes after a call to glBufferSubData(<int> 0x8892, <long>, <long>, <java.nio.Buffer>): GL_INVALID_VALUE ( 1281 0x501), 
   at javax.media.opengl.DebugGL3.checkGLGetError(DebugGL3.java:12595)
   at javax.media.opengl.DebugGL3.glBufferSubData(DebugGL3.java:1409)
   at RealMain$JOGLRenderer.init(RealMain.java:72)
   at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:155)
   at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:175)
   at javax.media.opengl.awt.GLCanvas$InitAction.run(GLCanvas.java:856)
   at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:356)
   at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:890)
   at java.awt.event.InvocationEvent.dispatch(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$000(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.awt.EventQueue$1.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

So looking at that error it looks like I managed to break my VBOs while trying to get shaders to work...
14  Java Game APIs & Engines / OpenGL Development / VBOs and Shaders in JOGL on: 2011-08-01 13:25:12
So I got the hang of immediate mode drawing and tried doing some basic landscape rendering with it but was not pleased with the speed so I decided to try my hand with VBOs, then having conquered VBOs I decided to try adding shaders to that, and that's where I ran into serious trouble. I've been trying the last few days to get the below code to work and it compiles fine, but opengl gives me a 1281 error

this code goes in the realmain class
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import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.glu.GLU;
import javax.swing.*;

import com.jogamp.opengl.util.FPSAnimator;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;

public class RealMain{    
   public static void main(String[] args)    {        
      JFrame frame = new JFrame("JOGL test");
      frame.setSize(640, 480);
      GLProfile glProfile = GLProfile.getDefault();
      GLCapabilities glCapabilities = new GLCapabilities(glProfile); 
      GLCanvas canvas = new GLCanvas(glCapabilities);        
      frame.add(canvas);       
      canvas.addGLEventListener(new JOGLRenderer());   
      FPSAnimator animator = new FPSAnimator(canvas, 60);   
      animator.add(canvas); 
      animator.start();       
      frame.addWindowListener(new WindowAdapter(){           
         public void windowClosing(WindowEvent e)            {  
            System.exit(0);            }        });   
      frame.setVisible(true);   
   }   
   private static class JOGLRenderer implements GLEventListener    { 
      ShaderProgram shader;
      public void init(GLAutoDrawable drawable){



         shader = new ShaderProgram(drawable, new File("bin/vert.txt"), new File("bin/frag.txt"));

         //setup opengl
         GL3 gl = drawable.getGL().getGL3();       
         gl.glClearColor(0.2f, 0.2f, 0.0f, 0.0f);        
         gl.glClearDepth(1.0f);          
         gl.glEnable(GL.GL_DEPTH_TEST);         
         gl.glDepthFunc(GL.GL_LEQUAL);           
         gl.glHint(GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);  

         // Create vertex data         
         float[] vertexData = new float[]{
               -1f, 1f, -2.0f, //0
               1f, 1f, -2.0f, //1
               -1f, -1f, -2.0f, //2
               1f, -1f, -2.0f, //3
         };
         ByteBuffer vertexByteBuffer = ByteBuffer.allocateDirect(7 * 4 * 4);            
         vertexByteBuffer.order(ByteOrder.nativeOrder());      
         FloatBuffer vertexBuffer = vertexByteBuffer.asFloatBuffer();          
         vertexBuffer.put(vertexData);

         // Create vertex buffer              
         int[] vertexBufferId = new int[1];         
         gl.glGenBuffers(1, vertexBufferId, 0);        
         gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, vertexBufferId[0]);      
         gl.glBufferData(GL2.GL_ARRAY_BUFFER, 48, null, GL2.GL_DYNAMIC_DRAW); 
         // Load vertex data into vertex buffer         
         gl.glBufferSubData(GL2.GL_ARRAY_BUFFER, 0, vertexByteBuffer.capacity(), vertexByteBuffer);

         // Create index data           
         int[] indexData = new int[]{0, 1, 2, 3};

         ByteBuffer indexByteBuffer = ByteBuffer.allocateDirect(4 * 4);     
         indexByteBuffer.order(ByteOrder.nativeOrder());
         IntBuffer indexBuffer = indexByteBuffer.asIntBuffer();       
         indexBuffer.put(indexData);

         // Create index buffer     
         int[] indexBufferId = new int[1];      
         gl.glGenBuffers(1, indexBufferId, 0);
         gl.glBindBuffer(GL2.GL_ELEMENT_ARRAY_BUFFER, indexBufferId[0]);          
         gl.glBufferData(GL2.GL_ELEMENT_ARRAY_BUFFER, 16, null, GL2.GL_DYNAMIC_DRAW);       
         // Load index data into index buffer          
         gl.glBufferSubData(GL2.GL_ELEMENT_ARRAY_BUFFER, 0, indexByteBuffer.capacity(), indexByteBuffer);

         

      }
      public void dispose(GLAutoDrawable drawable){} 
      public void display(GLAutoDrawable drawable){         
         GL3 gl = drawable.getGL().getGL3();   
         gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);       


         //gl.glMatrixMode(GL2.GL_MODELVIEW);
         //gl.glLoadIdentity();          
         int stride = 3 * 4; //3 floats per vert * 4 bytes per float


         
         gl.glVertexAttribPointer(gl.glGetAttribLocation(shader.p, "vertex"), 3, gl.GL_FLOAT, false, 20, 0);
         System.out.println(gl.glGetError()); 
         
         //shader code
         gl.glUseProgram(shader.p);
         gl.glDrawRangeElements(GL2.GL_TRIANGLE_STRIP, 0, 2, 3, GL2.GL_UNSIGNED_INT, 0); //start render at 0 verts go to 3 for a count of 4
         gl.glUseProgram(0);
      }    


      public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)        {          
         GL3 gl = drawable.getGL().getGL3();     
         GLU glu = new GLU(); 
         gl.glViewport(0, 0, width, height);   
         glu.gluPerspective(45.0f, (float) width / (float) height, 0.1f, 100.0f);  
      } 
   }
}


and this goes in shaderprogram
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.Scanner;

import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;
 
public class ShaderProgram {
   
    public ShaderProgram(GLAutoDrawable drawable, File vertf, File fragf) {
       this.vertf = vertf;
       this.fragf = fragf;
        GL3 gl = drawable.getGL().getGL3();
        
        int p = gl.glCreateProgram();
        
        
        //VERTEX STUFF
        int v = gl.glCreateShader(gl.GL_VERTEX_SHADER);
        
        ArrayList <String> vSourceA = new ArrayList<String>();
        Scanner vert = null;
      try {
         vert = new Scanner(vertf);
      } catch (FileNotFoundException e) {
         System.out.println("Vertex shader file was not found");
      }

      vert.useDelimiter("\n");
      
        while(vert.hasNext()){
           String temp = vert.next() + "\n";
           vSourceA.add(temp);
           System.out.print(temp);
        }
        
        String[] vSource = new String[vSourceA.size()];
        vSource = vSourceA.toArray(vSource);
        int [] lengths= new int[vSource.length];
        for(int i = 0; i < vSource.length; i++){
           lengths[i] = vSource[i].length();
        }
        
        gl.glShaderSource(v, lengths.length, vSource, lengths, 0);        
        gl.glCompileShader(v);
        gl.glAttachShader(p, v);
        
        //FRAGMENT SHADER CODE
        int f = gl.glCreateShader(gl.GL_FRAGMENT_SHADER);
        
        ArrayList <String> fSourceA = new ArrayList<String>();
        
        Scanner frag = null;
      try {
         frag = new Scanner(fragf);
      } catch (FileNotFoundException e) {
         System.out.println("Fragment shader file was not found");
      }
      
      
      frag.useDelimiter("\n");
        while(frag.hasNext()){
           String temp = frag.next() + "\n";
           fSourceA.add(temp);
           System.out.print(temp);
        }
        
        String[] fSource = new String[fSourceA.size()];
        fSource = fSourceA.toArray(fSource);
        lengths= new int[fSource.length];
        for(int i = 0; i < fSource.length; i++){
           lengths[i] = fSource[i].length();
        }
        
        gl.glShaderSource(f, lengths.length, fSource, lengths, 0);        
        gl.glCompileShader(f);
        gl.glAttachShader(p, f);
        
        
        //PROGRAM CODE
        gl.glLinkProgram(p);
        gl.glValidateProgram(p);
        System.out.println(gl.glGetError());
        valid = true;
    }
 
    int p;
    boolean valid = false;
     
    File vertf;
    File fragf;
 
}

frag.txt
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#version 150
out vec4 fragmentColor;
void
main()
{
    fragmentColor = vec4(0.0, 1.0, 0.0, 1.0);
}
";

vert.txt
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#version 150
in vec3 vertex;
void
main()
{
    gl_Position = vec4(vertex,1.0);
}
";
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