* @param worldStructure
* the world's structure
* @return fog filter or null if scene does not define it
*/
public FogFilter toFog(Structure worldStructure) {
FogFilter result = null;
int mode = ((Number) worldStructure.getFieldValue("mode")).intValue();
if ((mode & MODE_MIST) != 0) {
LOGGER.fine("Loading fog.");
result = new FogFilter();
result.setFogColor(this.toBackgroundColor(worldStructure));
}
return result;
}