New facade system (#3702)

Completely new system to render facades.

It will now support many more cases compared to the old system.
For example connected textures are now possible, as well as multilayer models and so on.

src/main/java/appeng/integration/abstraction/IAEFacade.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2013 - 2018, AlgorithmX2, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.integration.abstraction;
+
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.IBlockAccess;
+import net.minecraftforge.fml.common.Optional;
+
+import team.chisel.ctm.api.IFacade;
+
+
+/**
+ * Neat abstraction class for All the IFacade interfaces.
+ *
+ * @author covers1624
+ */
+@Optional.Interface( iface = "team.chisel.ctm.api.IFacade", modid = "ctm-api" )
+public interface IAEFacade extends IFacade
+{
+
+	IBlockState getFacadeState( IBlockAccess world, BlockPos pos, EnumFacing side );
+
+	@Nonnull
+	@Override
+	@Optional.Method( modid = "ctm-api" )
+	default IBlockState getFacade( @Nonnull IBlockAccess world, @Nonnull BlockPos pos, @Nullable EnumFacing side, @Nonnull BlockPos connection )
+	{
+		return getFacadeState( world, pos, side );
+	}
+
+	@Nonnull
+	@Override
+	@Optional.Method( modid = "ctm-api" )
+	default IBlockState getFacade( @Nonnull IBlockAccess world, @Nonnull BlockPos pos, @Nullable EnumFacing side )
+	{
+		return getFacadeState( world, pos, side );
+	}
+}