@Override public void initForRendering(UnifiedImageBuilder imageBdr,CoordTransformer transformer,WayNodeProvider wnProvider){
  super.initForRendering(imageBdr,transformer,wnProvider);
  wayNodeHash.clear();
  scale=transformer.computeScale();
  displayFactorSym=displayFactor * transformer.getDotsPerUnit();
  imageBdr.setFontSize(defaultFontSize * displayFactorSym);
  areaBuffer.clear();
  wayBuffer.clear();
  nodeBuffer.clear();
  trackBuffer.clear();
  nameInfoBuffer.clear();
}

@ Override public void initForRendering ( UnifiedImageBuilder imageBdr , CoordTransformer transformer , WayNodeProvider wnProvider ) { super . initForRendering ( imageBdr , transformer , wnProvider ) ; wayNodeHash . clear ( ) ; scale = transformer . computeScale ( ) ; displayFactorSym = displayFactor * transformer . getDotsPerUnit ( ) ; imageBdr . setFontSize ( defaultFontSize * displayFactorSym ) ; areaBuffer . clear ( ) ; wayBuffer . clear ( ) ; nodeBuffer . clear ( ) ; trackBuffer . clear ( ) ; nameInfoBuffer . clear ( ) ; }
clears all buffers and prepares rendering .
