Introduced a third phase in blueprint building, fix #1659.

Further refinements in builder processing.

api/buildcraft/api/blueprints/Schematic.java

@@ -42,6 +42,30 @@ import buildcraft.api.core.IInvSlot;
  */
 public abstract class Schematic {
 
+	/**
+	 * Blocks are build in various stages, in order to make sure that a block
+	 * can indeed be placed, and that it's unlikely to disturb other blocks.
+	 */
+	public static enum BuildingStage {
+		/**
+		 * Standalone blocks can be placed in the air, and they don't change
+		 * once placed.
+		 */
+		STANDALONE,
+
+		/**
+		 * Supported blocks may require to be placed on a standalone block,
+		 * e.g. a torch.
+		 */
+		SUPPORTED,
+
+		/**
+		 * Expanding blocks will grow and may disturb other block locations,
+		 * like e.g. water
+		 */
+		EXPANDING
+	}
+
 	/**
 	 * Return true if the block on the world correspond to the block stored in
 	 * the blueprint at the location given by the slot. By default, this
@@ -232,11 +256,9 @@ public abstract class Schematic {
 	}
 
 	/**
-	 * Return true if this schematic is standalone, false if it needs other
-	 * blocks to be build on. Typically, solid blocks are standalone, others
-	 * are not. All standalone blocks are supposed to be built first.
+	 * Return the stage where this schematic has to be built.
 	 */
-	public boolean isStandalone () {
-		return true;
+	public BuildingStage getBuildStage () {
+		return BuildingStage.STANDALONE;
 	}
 }

api/buildcraft/api/blueprints/SchematicBlock.java

@@ -12,11 +12,13 @@ import java.util.ArrayList;
 import java.util.LinkedList;
 
 import net.minecraft.block.Block;
+import net.minecraft.block.BlockLiquid;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
 import net.minecraftforge.common.util.Constants;
+import net.minecraftforge.fluids.BlockFluidBase;
 
 public class SchematicBlock extends SchematicBlockBase {
 
@@ -159,7 +161,13 @@ public class SchematicBlock extends SchematicBlockBase {
 	}
 
 	@Override
-	public boolean isStandalone () {
-		return block.isOpaqueCube();
+	public BuildingStage getBuildStage () {
+		if (block.isOpaqueCube()) {
+			return BuildingStage.STANDALONE;
+		} else if (block instanceof BlockFluidBase || block instanceof BlockLiquid) {
+			return BuildingStage.EXPANDING;
+		} else {
+			return BuildingStage.SUPPORTED;
+		}
 	}
 }

common/buildcraft/builders/TileBuilder.java

@@ -368,6 +368,8 @@ public class TileBuilder extends TileAbstractBuilder implements IMachine {
 
 				if (currentPathIterator == null) {
 					done = true;
+				} else {
+					done = false;
 				}
 			} else {
 				if (bluePrintBuilder != null && bluePrintBuilder.isDone(this)) {
@@ -382,6 +384,7 @@ public class TileBuilder extends TileAbstractBuilder implements IMachine {
 					if (bluePrintBuilder != null) {
 						box.initialize(bluePrintBuilder);
 						sendNetworkUpdate();
+						done = false;
 					}
 				}
 			}
@@ -398,6 +401,7 @@ public class TileBuilder extends TileAbstractBuilder implements IMachine {
 			}
 
 			items[0] = null;
+			box.reset();
 		}
 	}
 

common/buildcraft/core/blueprints/BptBuilderBlueprint.java

@@ -98,7 +98,8 @@ public class BptBuilderBlueprint extends BptBuilderBase {
 		}
 
 		LinkedList<BuildingSlotBlock> tmpStandalone = new LinkedList<BuildingSlotBlock>();
-		LinkedList<BuildingSlotBlock> tmpLastBlocks = new LinkedList<BuildingSlotBlock>();
+		LinkedList<BuildingSlotBlock> tmpSupported = new LinkedList<BuildingSlotBlock>();
+		LinkedList<BuildingSlotBlock> tmpExpanding = new LinkedList<BuildingSlotBlock>();
 
 		for (int j = 0; j < blueprint.sizeY; ++j) {
 			for (int i = 0; i < blueprint.sizeX; ++i) {
@@ -122,13 +123,19 @@ public class BptBuilderBlueprint extends BptBuilderBase {
 
 					if (!builtLocations.contains(new BlockIndex(xCoord, yCoord,
 								zCoord))) {
-
-						if (slot.isStandalone()) {
+						switch (slot.getBuildStage()) {
+						case STANDALONE:
 							tmpStandalone.add(b);
 							b.buildStage = 1;
-						} else {
-							tmpLastBlocks.add(b);
+							break;
+						case SUPPORTED:
+							tmpSupported.add(b);
 							b.buildStage = 2;
+							break;
+						case EXPANDING:
+							tmpExpanding.add(b);
+							b.buildStage = 3;
+							break;
 						}
 					} else {
 						postProcessing.add(b);
@@ -138,7 +145,8 @@ public class BptBuilderBlueprint extends BptBuilderBase {
 		}
 
 		buildList.addAll(tmpStandalone);
-		buildList.addAll(tmpLastBlocks);
+		buildList.addAll(tmpSupported);
+		buildList.addAll(tmpExpanding);
 
 		iterator = new BuildingSlotIterator(buildList);
 

common/buildcraft/transport/blueprints/SchematicPipe.java

@@ -133,7 +133,7 @@ public class SchematicPipe extends SchematicTile {
 	}
 
 	@Override
-	public boolean isStandalone () {
-		return true;
+	public BuildingStage getBuildStage () {
+		return BuildingStage.STANDALONE;
 	}
 }