diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 1c1aab10c2..c4f799de6b 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -5,6 +5,7 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
 
 import net.minecraft.server.DamageSource;
 import net.minecraft.server.EntityArmorStand;
@@ -151,19 +152,58 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         return blocks;
     }
 
+    private List<Block> getLineOfSight(Set<Material> transparent, int maxDistance, int maxLength) {
+        if (maxDistance > 120) {
+            maxDistance = 120;
+        }
+        ArrayList<Block> blocks = new ArrayList<Block>();
+        Iterator<Block> itr = new BlockIterator(this, maxDistance);
+        while (itr.hasNext()) {
+            Block block = itr.next();
+            blocks.add(block);
+            if (maxLength != 0 && blocks.size() > maxLength) {
+                blocks.remove(0);
+            }
+            Material material = block.getType();
+            if (transparent == null) {
+                if (!material.equals(Material.AIR)) {
+                    break;
+                }
+            } else {
+                if (!transparent.contains(material)) {
+                    break;
+                }
+            }
+        }
+        return blocks;
+    }
+
     public List<Block> getLineOfSight(HashSet<Byte> transparent, int maxDistance) {
         return getLineOfSight(transparent, maxDistance, 0);
     }
 
+    public List<Block> getLineOfSight(Set<Material> transparent, int maxDistance) {
+        return getLineOfSight(transparent, maxDistance, 0);
+    }
+
     public Block getTargetBlock(HashSet<Byte> transparent, int maxDistance) {
         List<Block> blocks = getLineOfSight(transparent, maxDistance, 1);
         return blocks.get(0);
     }
 
+    public Block getTargetBlock(Set<Material> transparent, int maxDistance) {
+        List<Block> blocks = getLineOfSight(transparent, maxDistance, 1);
+        return blocks.get(0);
+    }
+
     public List<Block> getLastTwoTargetBlocks(HashSet<Byte> transparent, int maxDistance) {
         return getLineOfSight(transparent, maxDistance, 2);
     }
 
+    public List<Block> getLastTwoTargetBlocks(Set<Material> transparent, int maxDistance) {
+        return getLineOfSight(transparent, maxDistance, 2);
+    }
+
     @Deprecated
     public Arrow shootArrow() {
         return launchProjectile(Arrow.class);