public void checkTripleBuffer(){
  if (tripleBuffer != null) {
    if (tripleBuffer.getWidth() != getWidth() || tripleBuffer.getHeight() != getHeight()) {
      destroyTripleBuffer();
    }
  }
  if (tripleBuffer == null) {
    createTripleBuffer(getWidth(),getHeight());
  }
}

public void checkTripleBuffer ( ) { if ( tripleBuffer != null ) { if ( tripleBuffer . getWidth ( ) != getWidth ( ) || tripleBuffer . getHeight ( ) != getHeight ( ) ) { destroyTripleBuffer ( ) ; } } if ( tripleBuffer == null ) { createTripleBuffer ( getWidth ( ) , getHeight ( ) ) ; } }
checks if the triple buffer exists and creates a new one if it does not . also compares the size of the buffer with the size of the graph and drops the buffer if it has a different size .
