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Author: Sparky83 (posted 2013-03-21 17:52:07, viewed 207 times)

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public class VBOHelper {

   public static enum Type{
      INT, FLOAT;
   }
   
   private Type type;
   private int glVBOInstance;
   private int size;
   private FloatBuffer floatBuff;
   private IntBuffer intBuff;
   private int inserted;
   
   public VBOHelper(Type t, int sz){
      type = t;
      size = sz;
      getOGLBuffer();
      initByType();
   }
   
   private void getOGLBuffer(){
      glVBOInstance = GL15.glGenBuffers();
   }
   
   private void initByType(){
      switch(type){
      case FLOAT:
         floatBuff = BufferUtils.createFloatBuffer(size);
         break;
      case INT:
         intBuff = BufferUtils.createIntBuffer(size);
         break;
      }
   }
   
   public void fillBuffer(int ... vs){
      try{
         intBuff.put(vs);
      } catch(BufferOverflowException e){
         System.err.println("Not enough space in buffer! Nothing changed!");
      }
      inserted += vs.length;
   }
   
   public void fillBuffer(float ... vs){
      try{
         floatBuff.put(vs);
      } catch(BufferOverflowException e){
         System.err.println("Not enough space in buffer! Nothing changed!");
      }
      inserted += vs.length;
   }
   
   public void copyToGLBuffer(int target){
      bind(target);
      switch(type){
      case FLOAT:
         floatBuff.rewind();
         GL15.glBufferData(target, floatBuff, GL15.GL_STATIC_DRAW);
         break;
      case INT:
         intBuff.rewind();
         GL15.glBufferData(target, intBuff, GL15.GL_STATIC_DRAW);
      }
   }
   
   public int getLength(){
      return inserted;
   }
   
   public static void unbind(){
      GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
   }
   
   public void bind(int target){
      GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, glVBOInstance);
   }
   
   public int getVBOInstance(){
      return glVBOInstance;
   }
   
   public Buffer getBuffer(){
      return (intBuff == null ? floatBuff : intBuff);
   }
}





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