Fixes anchor rendering (#2698)

* Fixes #2680: Use a shorter cable anchor model when blocked by a facade.
* Fixes #2664: Prevent anchors from creating intersection.

Replaced the simple List<ResourceLocation> for the static models with a
new container also indicating a solid part, which can be used to prevent
the creation of an intersection.

src/main/java/appeng/parts/p2p/PartP2PLiquids.java

@@ -27,12 +27,12 @@ import java.util.Stack;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.EnumFacing;
-import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fluids.Fluid;
 import net.minecraftforge.fluids.FluidStack;
 import net.minecraftforge.fluids.FluidTankInfo;
 import net.minecraftforge.fluids.IFluidHandler;
 
+import appeng.api.parts.IPartModel;
 import appeng.items.parts.PartModels;
 import appeng.me.GridAccessException;
 
@@ -43,7 +43,7 @@ public class PartP2PLiquids extends PartP2PTunnel<PartP2PLiquids> implements IFl
 	private static final P2PModels MODELS = new P2PModels( "part/p2p/p2p_tunnel_liquids" );
 
 	@PartModels
-	public static List<ResourceLocation> getModels()
+	public static List<IPartModel> getModels()
 	{
 		return MODELS.getModels();
 	}
@@ -304,7 +304,7 @@ public class PartP2PLiquids extends PartP2PTunnel<PartP2PLiquids> implements IFl
 	}
 
 	@Override
-	public List<ResourceLocation> getStaticModels()
+	public IPartModel getStaticModels()
 	{
 		return MODELS.getModel( isPowered(), isActive() );
 	}