MinecraftForge/MinecraftForge — pull request #68 by WaDelma (2012-06-03 09:27:44+00:00)
Title: Improved IConnectRedstone

This change allows Blocks implementing IConnectRedstone to determine direction of redstone even if it's below or above it.
I used numbers from -1 to -8 to represent the directions so that -1 starts below ones and -5 starts above ones.