Add BlockDaylightDetector from mc-dev for diff visibility

src/main/java/net/minecraft/server/BlockDaylightDetector.java

@@ -0,0 +1,71 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+public class BlockDaylightDetector extends BlockContainer {
+
+    private IIcon[] a = new IIcon[2];
+
+    public BlockDaylightDetector(int i) {
+        super(i, Material.WOOD);
+        this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.375F, 1.0F);
+        this.a(CreativeModeTab.d);
+    }
+
+    public void updateShape(IBlockAccess iblockaccess, int i, int j, int k) {
+        this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.375F, 1.0F);
+    }
+
+    public int b(IBlockAccess iblockaccess, int i, int j, int k, int l) {
+        return iblockaccess.getData(i, j, k);
+    }
+
+    public void a(World world, int i, int j, int k, Random random) {}
+
+    public void doPhysics(World world, int i, int j, int k, int l) {}
+
+    public void onPlace(World world, int i, int j, int k) {}
+
+    public void i_(World world, int i, int j, int k) {
+        if (!world.worldProvider.f) {
+            int l = world.getData(i, j, k);
+            int i1 = world.b(EnumSkyBlock.SKY, i, j, k) - world.j;
+            float f = world.d(1.0F);
+
+            if (f < 3.1415927F) {
+                f += (0.0F - f) * 0.2F;
+            } else {
+                f += (6.2831855F - f) * 0.2F;
+            }
+
+            i1 = Math.round((float) i1 * MathHelper.cos(f));
+            if (i1 < 0) {
+                i1 = 0;
+            }
+
+            if (i1 > 15) {
+                i1 = 15;
+            }
+
+            if (l != i1) {
+                world.setData(i, j, k, i1, 3);
+            }
+        }
+    }
+
+    public boolean b() {
+        return false;
+    }
+
+    public boolean c() {
+        return false;
+    }
+
+    public boolean isPowerSource() {
+        return true;
+    }
+
+    public TileEntity b(World world) {
+        return new TileEntityLightDetector();
+    }
+}