Vertex Array - beginner problem

akzyl

Senior Newbie

« Posted 2012-02-01 09:19:23 »

Hello.
I wont to create cube using Vertex Array but unfortunately I have problem. The problem is that the only one wall appear with second (left wall) something bad happening.
I also want to add that I haven't any problem with creating cube using immediate mode.

OK, this is my code?

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package com.applet;

import static org.lwjgl.opengl.GL11.GL_COLOR_ARRAY;
import static org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT;
import static org.lwjgl.opengl.GL11.GL_DEPTH_BUFFER_BIT;
import static org.lwjgl.opengl.GL11.GL_DEPTH_TEST;
import static org.lwjgl.opengl.GL11.GL_LEQUAL;
import static org.lwjgl.opengl.GL11.GL_MODELVIEW;
import static org.lwjgl.opengl.GL11.GL_PERSPECTIVE_CORRECTION_HINT;
import static org.lwjgl.opengl.GL11.GL_PROJECTION;
import static org.lwjgl.opengl.GL11.GL_QUADS;
import static org.lwjgl.opengl.GL11.GL_VERTEX_ARRAY;
import static org.lwjgl.opengl.GL11.glClear;
import static org.lwjgl.opengl.GL11.glClearDepth;
import static org.lwjgl.opengl.GL11.glColorPointer;
import static org.lwjgl.opengl.GL11.glDepthFunc;
import static org.lwjgl.opengl.GL11.glDisableClientState;
import static org.lwjgl.opengl.GL11.glDrawArrays;
import static org.lwjgl.opengl.GL11.glEnable;
import static org.lwjgl.opengl.GL11.glEnableClientState;
import static org.lwjgl.opengl.GL11.glLoadIdentity;
import static org.lwjgl.opengl.GL11.glMatrixMode;
import static org.lwjgl.opengl.GL11.glShadeModel;
import static org.lwjgl.opengl.GL11.glVertexPointer;
import static org.lwjgl.opengl.GL11.glViewport;
import static org.lwjgl.util.glu.GLU.gluPerspective;

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.nio.FloatBuffer;

import javax.swing.JApplet;

import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;

import com.Conf;

public class CubeVA  extends JApplet {
   
   /**
    * 
    */
   private static final long serialVersionUID = -730031275017948496L;
   private Canvas canvas;
   private Thread gameThread;
   boolean running = false;
   
   public void startLWJGL(){
      gameThread = new Thread (){
         
         public void run(){
            running = true;
            try {
               Display.setParent(canvas);
               Display.create();
               Display.setVSyncEnabled(true);
               initGL();
            } catch (LWJGLException e) {
               e.printStackTrace();
            }
            gameLoop();
         }

      };
      gameThread.start();
   }
   
   public void stopLWJGL(){
      running = false;
      try {
         gameThread.join();
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
   }

   public void destroy(){
      remove(canvas);
      super.destroy();
   }
   
   public void init(){
      setLayout(new BorderLayout());
      canvas = new Canvas(){
         /**
          * 
          */
         private static final long serialVersionUID = 5972822387678455353L;

         public final void addNotify(){
            super.addNotify();
            startLWJGL();
         }
         
         public final void removeNotify(){
            stopLWJGL();
            super.removeNotify();
         }
      };
      canvas.setSize(Conf.W, Conf.H);
      setSize(Conf.W, Conf.H);
      canvas.setBackground(Color.BLACK);
      canvas.setFocusable(true);
      canvas.requestFocus();
      canvas.setIgnoreRepaint(false);
      add(canvas);
   }
   
   private void initGL() {
      glViewport(0, 0,  Conf.W,Conf.H); // Reset The Current Viewport
      glMatrixMode(GL_PROJECTION);
      glLoadIdentity();
      gluPerspective(45.0f, ((float)Conf.W / (float)Conf.H) , 0.1f, 100f);
      glMatrixMode(GL_MODELVIEW);
      glLoadIdentity();
      
      
      glShadeModel(GL11.GL_SMOOTH); // Enables Smooth Shading
      GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background
      glClearDepth(1.0f); // Depth Buffer Setup
      glEnable(GL_DEPTH_TEST); // Enables Depth Testing
      glDepthFunc(GL_LEQUAL); // The Type Of Depth Test To Do
      GL11.glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); // Really Nice Perspective Calculations
      
   }
   float rquad; // Angle For The Quad
   public void gameLoop(){
      final int amountOfVertices = 8;
        final int vertexSize = 3;
        final int colorSize = 3;
      
        FloatBuffer vertexData = BufferUtils.createFloatBuffer(amountOfVertices * vertexSize);
        vertexData.put(new float[]{-0.5f, 0.5f, 0.0f, 0.5f, 0.5f, 0.0f, 0.5f, -0.5f, 0.0f, -0.5f, -0.5f, 0.0f, 0.5f, 0.5f, 0.0f, 0.5f, -0.5f, 0.0f, 0.5f, -0.5f, -1.0f, 0.5f, 0.5f, -1.0f});
        vertexData.flip();

        FloatBuffer colorData = BufferUtils.createFloatBuffer(amountOfVertices * colorSize);
        colorData.put(new float[]{1, 0.2f, 0.2f, 0.2f, 1, 0.2f, 0.2f, 0.2f, 1});
        colorData.flip();
        
      while(running) {
         update();
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         glLoadIdentity();//Matrix reseting.
         GL11.glTranslatef(0.0f, 0.0f, -6.0f); // Move Right And Into The Screen
         GL11.glRotatef(rquad, 0.0f, 1.0f, 0.5f); // Rotate The Cube On X, Y & Z
         
         glEnableClientState(GL_VERTEX_ARRAY);
            glEnableClientState(GL_COLOR_ARRAY);
         
            glVertexPointer(vertexSize, 0, vertexData);
            glColorPointer(colorSize, 0, colorData);
            
            glDrawArrays(GL_QUADS, 0, amountOfVertices);
            
            glDisableClientState(GL_COLOR_ARRAY);
            glDisableClientState(GL_VERTEX_ARRAY);
         
         Display.sync(60);
         Display.update();
      }
      
      Display.destroy();
   }
   
   private void update(){
      rquad -= 1.55f; // Decrease The Rotation Variable For The Quad
   }

}