Added IPowerEmitter

common/buildcraft/api/power/IPowerEmitter.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) SpaceToad, 2011-2012
+ * http://www.mod-buildcraft.com
+ * 
+ * BuildCraft is distributed under the terms of the Minecraft Mod Public
+ * License 1.0, or MMPL. Please check the contents of the license located in
+ * http://www.mod-buildcraft.com/MMPL-1.0.txt
+ */
+package buildcraft.api.power;
+
+import net.minecraftforge.common.ForgeDirection;
+
+/**
+ * Essentially only used for Wooden Power Pipe connection rules.
+ *
+ * This Tile Entity interface allows you to indicate that a block can emit power
+ * from a specific side.
+ *
+ * @author CovertJaguar <http://www.railcraft.info/>
+ */
+public interface IPowerEmitter {
+
+	public boolean canEmitPowerFrom(ForgeDirection side);
+}

common/buildcraft/api/power/IPowerReceptor.java

@@ -11,10 +11,36 @@ import buildcraft.api.power.PowerHandler.PowerReceiver;
 import net.minecraft.world.World;
 import net.minecraftforge.common.ForgeDirection;
 
+/**
+ * This interface should be implemented by any Tile Entity that wishes to be
+ * able to receive power.
+ *
+ * @author CovertJaguar <http://www.railcraft.info/>
+ */
 public interface IPowerReceptor {
 
+	/**
+	 * Get the PowerReceiver for this side of the block. You can return the same
+	 * PowerReceiver for all sides or one for each side.
+	 *
+	 * You should NOT return null to this method unless you mean to NEVER
+	 * receive power from that side. Returning null, after previous returning a
+	 * PowerReceiver, will most likely cause pipe connections to derp out and
+	 * engines to eventually explode.
+	 *
+	 * @param side
+	 * @return
+	 */
 	public PowerReceiver getPowerReceiver(ForgeDirection side);
 
+	/**
+	 * Call back from the PowerHandler that is called when the store power
+	 * exceeds the activation power.
+	 *
+	 * It can be triggered by update() calls or power modification calls.
+	 *
+	 * @param workProvider
+	 */
 	public void doWork(PowerHandler workProvider);
 
 	public World getWorldObj();

common/buildcraft/api/power/PowerHandler.java

@@ -10,6 +10,7 @@ package buildcraft.api.power;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraftforge.common.ForgeDirection;
 import buildcraft.api.core.SafeTimeTracker;
+import java.util.EnumSet;
 
 public final class PowerHandler {
 
@@ -80,7 +81,7 @@ public final class PowerHandler {
 	private final SafeTimeTracker doWorkTracker = new SafeTimeTracker();
 	private final SafeTimeTracker sourcesTracker = new SafeTimeTracker();
 	private final SafeTimeTracker perditionTracker = new SafeTimeTracker();
-	public final int[] powerSources = {0, 0, 0, 0, 0, 0};
+	public final int[] powerSources = new int[6];
 	public final IPowerReceptor receptor;
 	private PerditionCalculator perdition;
 	private final PowerReceiver receiver;

common/buildcraft/energy/TileEngine.java

@@ -19,6 +19,7 @@ import buildcraft.BuildCraftEnergy;
 import buildcraft.api.core.Position;
 import buildcraft.api.gates.IOverrideDefaultTriggers;
 import buildcraft.api.gates.ITrigger;
+import buildcraft.api.power.IPowerEmitter;
 import buildcraft.api.power.IPowerReceptor;
 import buildcraft.api.power.PowerHandler;
 import buildcraft.api.power.PowerHandler.PowerReceiver;
@@ -35,7 +36,7 @@ import net.minecraft.inventory.ICrafting;
 import net.minecraft.nbt.NBTBase;
 import net.minecraft.nbt.NBTTagFloat;
 
-public abstract class TileEngine extends TileBuildCraft implements IPowerReceptor, IInventory, IOverrideDefaultTriggers, IPipeConnection {
+public abstract class TileEngine extends TileBuildCraft implements IPowerReceptor, IPowerEmitter, IInventory, IOverrideDefaultTriggers, IPipeConnection {
 
 	public enum EnergyStage {
 
@@ -495,6 +496,11 @@ public abstract class TileEngine extends TileBuildCraft implements IPowerRecepto
 		return with != orientation;
 	}
 
+	@Override
+	public boolean canEmitPowerFrom(ForgeDirection side) {
+		return side == orientation;
+	}
+
 	public void checkRedstonePower() {
 		isRedstonePowered = worldObj.isBlockIndirectlyGettingPowered(xCoord, yCoord, zCoord);
 	}

common/buildcraft/transport/PipeTransportPower.java

@@ -13,6 +13,7 @@ import net.minecraftforge.common.ForgeDirection;
 import buildcraft.BuildCraftCore;
 import buildcraft.api.core.SafeTimeTracker;
 import buildcraft.api.gates.ITrigger;
+import buildcraft.api.power.IPowerEmitter;
 import buildcraft.api.power.IPowerReceptor;
 import buildcraft.api.power.PowerHandler.PowerReceiver;
 import buildcraft.api.power.PowerHandler.Type;
@@ -76,9 +77,13 @@ public class PipeTransportPower extends PipeTransport {
 		if (tile instanceof IPowerReceptor) {
 			IPowerReceptor receptor = (IPowerReceptor) tile;
 			PowerReceiver receiver = receptor.getPowerReceiver(side.getOpposite());
-			if (receiver == null)
+			if (receiver != null && receiver.getType().canReceiveFromPipes())
-				return false;
+				return true;
-			if (container.pipe instanceof PipePowerWood || receiver.getType().canReceiveFromPipes())
+		}
+
+		if (container.pipe instanceof PipePowerWood && tile instanceof IPowerEmitter) {
+			IPowerEmitter emitter = (IPowerEmitter) tile;
+			if (emitter.canEmitPowerFrom(side.getOpposite()))
 				return true;
 		}
 

common/buildcraft/transport/pipes/PipePowerWood.java

@@ -50,16 +50,7 @@ public class PipePowerWood extends Pipe implements IPowerReceptor {
 
 	@Override
 	public int getIconIndex(ForgeDirection direction) {
-		if (direction == ForgeDirection.UNKNOWN)
 		return standardIconIndex;
-		else {
-			int metadata = worldObj.getBlockMetadata(xCoord, yCoord, zCoord);
-
-			if (metadata == direction.ordinal())
-				return solidIconIndex;
-			else
-				return standardIconIndex;
-		}
 	}
 
 	@Override