Fix relight and removelight (#475)

* Start work on lighting engine (does not build)

* Implement getLighting

* Setting, flushing light etc works. Getting light should be working..?

* Better queue/chunk handling

* Use correct location for lighting update

* Correct set location, remove debug

* cleanup a little

* Fix fixlight

* Apply to all versions for the numpties

* Remove lighting extent if not using

* Actually bitmask blocks when setting in chunks

* Initialise Maps and Dequeues with inital size

* format

* Documentation maybe

worldedit-core/src/main/java/com/sk89q/worldedit/extent/AbstractDelegateExtent.java

@@ -205,6 +205,46 @@ public class AbstractDelegateExtent implements Extent {
     public boolean setBiome(BlockVector2 position, BiomeType biome) {
         return extent.setBiome(position.getX(), 0, position.getZ(), biome);
     }
+
+    @Override
+    public boolean relight(int x, int y, int z) {
+        return extent.relight(x, y, z);
+    }
+
+    @Override
+    public boolean relightBlock(int x, int y, int z) {
+        return extent.relightBlock(x, y, z);
+    }
+
+    @Override
+    public boolean relightSky(int x, int y, int z) {
+        return extent.relightSky(x, y, z);
+    }
+
+    @Override
+    public void setSkyLight(int x, int y, int z, int value) {
+        extent.setSkyLight(x, y, z, value);
+    }
+
+    @Override
+    public void setBlockLight(int x, int y, int z, int value) {
+        extent.setSkyLight(x, y, z, value);
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return extent.getSkyLight(x, y, z);
+    }
+
+    @Override
+    public int getEmmittedLight(int x, int y, int z) {
+        return extent.getEmmittedLight(x, y, z);
+    }
+
+    @Override
+    public int getBrightness(int x, int y, int z) {
+        return extent.getBrightness(x, y, z);
+    }
     
     @Override
     public String toString() {

worldedit-core/src/main/java/com/sk89q/worldedit/extent/Extent.java

@@ -651,6 +651,18 @@ public interface Extent extends InputExtent, OutputExtent {
         return count;
     }
 
+    default boolean relight(int x, int y, int z) {
+        return false;
+    }
+
+    default boolean relightBlock(int x, int y, int z) {
+        return false;
+    }
+
+    default boolean relightSky(int x, int y, int z) {
+        return false;
+    }
+
     /**
      * Have an extent processed
      *  - Either block (Extent) processing or chunk processing

worldedit-core/src/main/java/com/sk89q/worldedit/extent/InputExtent.java

@@ -85,4 +85,48 @@ public interface InputExtent {
     default BiomeType getBiomeType(int x, int y, int z) {
         return getBiome(MutableBlockVector2.get(x, z));
     }
+
+    /**
+     * Get the light level at the given location
+     *
+     * @param position location
+     * @return the light level at the location
+     */
+    default int getEmmittedLight(MutableBlockVector3 position) {
+        return getEmmittedLight(position.getX(), position.getY(), position.getZ());
+    }
+
+    default int getEmmittedLight(int x, int y, int z) {
+        return 0;
+    }
+
+    /**
+     * Get the sky light level at the given location
+     *
+     * @param position location
+     * @return the sky light level at the location
+     */
+    default int getSkyLight(MutableBlockVector3 position) {
+        return getSkyLight(position.getX(), position.getY(), position.getZ());
+    }
+
+    default int getSkyLight(int x, int y, int z) {
+        return 0;
+    }
+
+    default int getBrightness(MutableBlockVector3 position) {
+        return getBrightness(position.getX(), position.getY(), position.getZ());
+    }
+
+    default int getBrightness(int x, int y, int z) {
+        return getFullBlock(x, y, z).getMaterial().getLightValue();
+    }
+
+    default int getOpacity(MutableBlockVector3 position) {
+        return getOpacity(position.getX(), position.getY(), position.getZ());
+    }
+
+    default int getOpacity(int x, int y, int z) {
+        return getFullBlock(x, y, z).getMaterial().getLightOpacity();
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/extent/OutputExtent.java

@@ -82,6 +82,30 @@ public interface OutputExtent {
         return setBiome(MutableBlockVector2.get(x, z), biome);
     }
 
+    /**
+     * Set the light value
+     *
+     * @param position position of the block
+     * @param value light level to set
+     */
+    default void setBlockLight(BlockVector3 position, int value) {
+        setBlockLight(position.getX(), position.getY(), position.getZ(), value);
+    }
+
+    default void setBlockLight(int x, int y, int z, int value) {}
+
+    /**
+     * Set the sky light value
+     *
+     * @param position position of the block
+     * @param value light level to set
+     */
+    default void setSkyLight(BlockVector3 position, int value) {
+        setSkyLight(position.getX(), position.getY(), position.getZ(), value);
+    }
+
+    default void setSkyLight(int x, int y, int z, int value) {}
+
     /**
      * Return an {@link Operation} that should be called to tie up loose ends
      * (such as to commit changes in a buffer).