Scatter brush fixes

core/src/main/java/com/boydti/fawe/object/brush/ScatterBrush.java

@@ -1,5 +1,6 @@
 package com.boydti.fawe.object.brush;
 
+import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.object.PseudoRandom;
 import com.boydti.fawe.object.collection.BlockVectorSet;
 import com.boydti.fawe.object.collection.LocalBlockVectorSet;
@@ -46,6 +47,11 @@ public class ScatterBrush implements Brush {
             this.mask = Masks.alwaysTrue();
         }
         this.adjacent = new AdjacentAnyMask(editSession, Arrays.asList(new BaseBlock(0)));
+        for (int id = 0; id < 256; id++) {
+            if (FaweCache.canPassThrough(id, 0)) {
+                adjacent.add(new BaseBlock(id, -1));
+            }
+        }
         final SolidBlockMask solid = new SolidBlockMask(editSession);
         final RadiusMask radius = new RadiusMask(0, (int) size);
 
@@ -57,6 +63,10 @@ public class ScatterBrush implements Brush {
         Operations.completeBlindly(visitor);
         BlockVectorSet visited = visitor.getVisited();
         int length = visited.size();
+        if (size == 0) {
+            length = 1;
+            visited.add(position);
+        }
 
         LocalBlockVectorSet placed = new LocalBlockVectorSet();
         int maxFails = 1000;

core/src/main/java/com/boydti/fawe/object/collection/BlockVectorSet.java

@@ -52,7 +52,7 @@ public class BlockVectorSet extends AbstractCollection<Vector> implements Set<Ve
                     return pos;
                 }
             }
-            count = newSize;
+            count += newSize;
         }
         return null;
     }

core/src/main/java/com/boydti/fawe/object/collection/LocalBlockVectorSet.java

@@ -106,7 +106,7 @@ public class LocalBlockVectorSet implements Set<Vector> {
             return null;
         }
         int index = -1;
-        for (int i = 0; i < getIndex; i++) {
+        for (int i = 0; i <= getIndex; i++) {
             index = set.nextSetBit(index + 1);
         }
         if (index != -1) {