CatServer/patches/net/minecraft/block/BlockSlab.java.patch

--- ../src-base/minecraft/net/minecraft/block/BlockSlab.java
+++ ../src-work/minecraft/net/minecraft/block/BlockSlab.java
@@ -21,7 +21,7 @@
 
 public abstract class BlockSlab extends Block
 {
-    public static final PropertyEnum<BlockSlab.EnumBlockHalf> HALF = PropertyEnum.<BlockSlab.EnumBlockHalf>create("half", BlockSlab.EnumBlockHalf.class);
+    public static final PropertyEnum<EnumBlockHalf> HALF = PropertyEnum.<EnumBlockHalf>create("half", EnumBlockHalf.class);
     protected static final AxisAlignedBB AABB_BOTTOM_HALF = new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.5D, 1.0D);
     protected static final AxisAlignedBB AABB_TOP_HALF = new AxisAlignedBB(0.0D, 0.5D, 0.0D, 1.0D, 1.0D, 1.0D);
 
@@ -50,13 +50,13 @@
         }
         else
         {
-            return state.getValue(HALF) == BlockSlab.EnumBlockHalf.TOP ? AABB_TOP_HALF : AABB_BOTTOM_HALF;
+            return state.getValue(HALF) == EnumBlockHalf.TOP ? AABB_TOP_HALF : AABB_BOTTOM_HALF;
         }
     }
 
     public boolean isTopSolid(IBlockState state)
     {
-        return ((BlockSlab)state.getBlock()).isDouble() || state.getValue(HALF) == BlockSlab.EnumBlockHalf.TOP;
+        return ((BlockSlab)state.getBlock()).isDouble() || state.getValue(HALF) == EnumBlockHalf.TOP;
     }
 
     public BlockFaceShape getBlockFaceShape(IBlockAccess worldIn, IBlockState state, BlockPos pos, EnumFacing face)
@@ -65,13 +65,13 @@
         {
             return BlockFaceShape.SOLID;
         }
-        else if (face == EnumFacing.UP && state.getValue(HALF) == BlockSlab.EnumBlockHalf.TOP)
+        else if (face == EnumFacing.UP && state.getValue(HALF) == EnumBlockHalf.TOP)
         {
             return BlockFaceShape.SOLID;
         }
         else
         {
-            return face == EnumFacing.DOWN && state.getValue(HALF) == BlockSlab.EnumBlockHalf.BOTTOM ? BlockFaceShape.SOLID : BlockFaceShape.UNDEFINED;
+            return face == EnumFacing.DOWN && state.getValue(HALF) == EnumBlockHalf.BOTTOM ? BlockFaceShape.SOLID : BlockFaceShape.UNDEFINED;
         }
     }
 
@@ -80,9 +80,22 @@
         return this.isDouble();
     }
 
+    @Override
+    public boolean doesSideBlockRendering(IBlockState state, IBlockAccess world, BlockPos pos, EnumFacing face)
+    {
+        if (net.minecraftforge.common.ForgeModContainer.disableStairSlabCulling)
+            return super.doesSideBlockRendering(state, world, pos, face);
+
+        if ( state.isOpaqueCube() )
+            return true;
+
+        EnumBlockHalf side = state.getValue(HALF);
+        return (side == EnumBlockHalf.TOP && face == EnumFacing.UP) || (side == EnumBlockHalf.BOTTOM && face == EnumFacing.DOWN);
+    }
+
     public IBlockState getStateForPlacement(World worldIn, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ, int meta, EntityLivingBase placer)
     {
-        IBlockState iblockstate = super.getStateForPlacement(worldIn, pos, facing, hitX, hitY, hitZ, meta, placer).withProperty(HALF, BlockSlab.EnumBlockHalf.BOTTOM);
+        IBlockState iblockstate = super.getStateForPlacement(worldIn, pos, facing, hitX, hitY, hitZ, meta, placer).withProperty(HALF, EnumBlockHalf.BOTTOM);
 
         if (this.isDouble())
         {
@@ -90,7 +103,7 @@
         }
         else
         {
-            return facing != EnumFacing.DOWN && (facing == EnumFacing.UP || (double)hitY <= 0.5D) ? iblockstate : iblockstate.withProperty(HALF, BlockSlab.EnumBlockHalf.TOP);
+            return facing != EnumFacing.DOWN && (facing == EnumFacing.UP || (double)hitY <= 0.5D) ? iblockstate : iblockstate.withProperty(HALF, EnumBlockHalf.TOP);
         }
     }
 
@@ -115,11 +128,11 @@
         {
             return false;
         }
-        else
+        else if (false) // Forge: Additional logic breaks doesSideBlockRendering and is no longer useful.
         {
             IBlockState iblockstate = blockAccess.getBlockState(pos.offset(side));
-            boolean flag = isHalfSlab(iblockstate) && iblockstate.getValue(HALF) == BlockSlab.EnumBlockHalf.TOP;
-            boolean flag1 = isHalfSlab(blockState) && blockState.getValue(HALF) == BlockSlab.EnumBlockHalf.TOP;
+            boolean flag = isHalfSlab(iblockstate) && iblockstate.getValue(HALF) == EnumBlockHalf.TOP;
+            boolean flag1 = isHalfSlab(blockState) && blockState.getValue(HALF) == EnumBlockHalf.TOP;
 
             if (flag1)
             {
@@ -149,6 +162,7 @@
                 return !isHalfSlab(iblockstate) || flag;
             }
         }
+        return super.shouldSideBeRendered(blockState, blockAccess, pos, side);
     }
 
     @SideOnly(Side.CLIENT)