allow hack to assing old tile id's as illumination id in split dataset

src/main/java/net/preibisch/mvrecon/process/splitting/SplittingTools.java

@@ -74,6 +74,8 @@
 
 public class SplittingTools
 {
+	public static boolean assingIlluminationsFromTileIds = false;
+
 	public static SpimData2 splitImages( final SpimData2 spimData, final long[] overlapPx, final long[] targetSize, final long[] minStepSize, final boolean optimize  )
 	{
 		final TimePoints timepoints = spimData.getSequenceDescription().getTimePoints();
@@ -101,6 +103,11 @@ public static SpimData2 splitImages( final SpimData2 spimData, final long[] over
 		// so each new one has to be the same across channel & illumination!
 		final int maxIntervalSpread = maxIntervalSpread( oldSetups, overlapPx, targetSize, minStepSize, optimize );
 
+		// check that there is only one illumination
+		if ( assingIlluminationsFromTileIds )
+			if ( spimData.getSequenceDescription().getAllIlluminationsOrdered().size() > 1 )
+				throw new IllegalArgumentException( "Cannot SplittingTools.assingIlluminationsFromTileIds because more than one Illumination exists." );
+
 		for ( final ViewSetup oldSetup : oldSetups )
 		{
 			final int oldID = oldSetup.getId();
@@ -139,7 +146,8 @@ public static SpimData2 splitImages( final SpimData2 spimData, final long[] over
 				final int newTileId = oldTile.getId() * maxIntervalSpread + localNewTileId;
 				localNewTileId++;
 				final Tile newTile = new Tile( newTileId, Integer.toString( newTileId ), location );
-				final ViewSetup newSetup = new ViewSetup( newId, null, newDim, voxDim, newTile, channel, angle, illum );
+				final Illumination newIllum = assingIlluminationsFromTileIds ? new Illumination( oldTile.getId(), "old_tile_" + oldTile.getId() ) : illum;
+				final ViewSetup newSetup = new ViewSetup( newId, null, newDim, voxDim, newTile, channel, angle, newIllum );
 				newSetups.add( newSetup );
 
 				// update registrations and interest points for all timepoints