Java tutorial
/* * This file is part of Blue Power. Blue Power is free software: you can redistribute it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Blue Power 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 General Public License for more details. You should have received a copy of the GNU General Public License along * with Blue Power. If not, see <http://www.gnu.org/licenses/> */ package com.bluepowermod.part.tube; import java.io.DataInput; import java.io.DataOutput; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import java.util.Queue; import java.util.Set; import java.util.Stack; import java.util.concurrent.LinkedBlockingQueue; import net.minecraft.entity.item.EntityItem; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.nbt.NBTTagList; import net.minecraft.tileentity.TileEntity; import net.minecraftforge.common.util.ForgeDirection; import org.apache.commons.lang3.tuple.ImmutablePair; import org.apache.commons.lang3.tuple.Pair; import org.lwjgl.opengl.GL11; import uk.co.qmunity.lib.network.PacketHelper; import uk.co.qmunity.lib.part.compat.MultipartCompatibility; import uk.co.qmunity.lib.vec.Vec3d; import com.bluepowermod.api.tube.IPneumaticTube; import com.bluepowermod.api.tube.ITubeConnection; import com.bluepowermod.api.tube.IWeightedTubeInventory; import com.bluepowermod.helper.IOHelper; import com.bluepowermod.init.Config; import com.bluepowermod.network.BPNetworkHandler; import com.bluepowermod.network.message.MessageRedirectTubeStack; import com.bluepowermod.tile.IFuzzyRetrieving; import com.bluepowermod.tile.tier3.TileManager; import cpw.mods.fml.relauncher.Side; import cpw.mods.fml.relauncher.SideOnly; /** * * @author MineMaarten */ public class TubeLogic implements IPneumaticTube { private final PneumaticTube tube; private TubeNode connectionNode; // contains a cache of connected TileEntities (not necessarily directly adjacent, but nodes, intersections, or // inventories). Also contains a colormask and distance. public List<TubeStack> tubeStacks = new ArrayList<TubeStack>(); private int roundRobinCounter; public TubeLogic(PneumaticTube tube) { this.tube = tube; } public void onClientTubeRedirectPacket(TubeStack stack) { for (TubeStack s : tubeStacks) {// Check if there's a stack that's awaiting server instructions that matches the sent stack. if (/* !s.enabled && */ItemStack.areItemStacksEqual(s.stack, stack.stack) && stack.color == s.color) { tubeStacks.remove(s); break; } } tubeStacks.add(stack); } public void clearNodeCaches() { List<PneumaticTube> clearedTubes = new ArrayList<PneumaticTube>(); Stack<PneumaticTube> todoTubes = new Stack<PneumaticTube>(); clearNodeCache(); boolean firstRun = true; todoTubes.push(tube); while (!todoTubes.isEmpty()) { PneumaticTube tube = todoTubes.pop(); if (tube.getParent() != null && tube.getWorld() != null) { for (ForgeDirection d : ForgeDirection.VALID_DIRECTIONS) { PneumaticTube neighbor = tube.getPartCache(d); if (neighbor != null) { if (!clearedTubes.contains(neighbor)) { neighbor.getLogic().clearNodeCache(); clearedTubes.add(neighbor); if (firstRun || !neighbor.isCrossOver) todoTubes.push(neighbor); } } } } firstRun = false; } } private void clearNodeCache() { if (connectionNode != null) connectionNode.edges = null; } TubeNode getNode() { if (connectionNode == null && tube.getWorld() != null) { connectionNode = new TubeNode(tube); connectionNode.init(); } else if (connectionNode != null && connectionNode.edges == null) { connectionNode.init(); } return connectionNode; } public void update() { if (!Config.enableTubeCaching) clearNodeCache(); Iterator<TubeStack> iterator = tubeStacks.iterator(); while (iterator.hasNext()) { TubeStack tubeStack = iterator.next(); if (tubeStack.update(tube.getWorld())) { if (!tube.isCrossOver) { for (ForgeDirection dir : ForgeDirection.VALID_DIRECTIONS) { if (tube.connections[dir.ordinal()] && dir != tubeStack.heading.getOpposite()) { tubeStack.heading = dir; break; } } } else {// when we are at an intersection if (!tube.getWorld().isRemote) { Pair<ForgeDirection, TileEntity> heading = getHeadingForItem(tubeStack, false); if (heading == null) {// if no valid destination for (int i = 0; i < 6; i++) { TubeEdge edge = getNode().edges[i]; if (edge != null) { tubeStack.heading = ForgeDirection.getOrientation(i);// this will allow the item to ignore the color mask when // there's really no option left. if (canPassThroughMask(tubeStack.color, edge.colorMask)) { tubeStack.heading = ForgeDirection.getOrientation(i);// just a specific direction for now. break; } } } } else { tubeStack.heading = heading.getKey(); } BPNetworkHandler.INSTANCE.sendToAllAround(new MessageRedirectTubeStack(tube, tubeStack), tube.getWorld()); } else { tubeStack.enabled = false; } } } else if (tubeStack.progress >= 1) {// when the item reached the end of the tube. TileEntity output = tube.getTileCache(tubeStack.heading); PneumaticTube tube = this.tube.getPartCache(tubeStack.heading); if (tube != null) {// we don't need to check connections, that's catched earlier. TubeLogic logic = tube.getLogic(); tubeStack.progress = 0; tubeStack.oldProgress = -tubeStack.getSpeed() * TubeStack.tickTimeMultiplier; logic.tubeStacks.add(tubeStack);// transfer to another tube. iterator.remove(); } else if (!this.tube.getWorld().isRemote) { ItemStack remainder = tubeStack.stack; if (output instanceof ITubeConnection && ((ITubeConnection) output).isConnectedTo(tubeStack.heading.getOpposite())) { TubeStack rem = ((ITubeConnection) output).acceptItemFromTube(tubeStack, tubeStack.heading.getOpposite(), false); if (rem != null) remainder = rem.stack; else remainder = null; } if (remainder != null) remainder = IOHelper.insert(output, remainder, tubeStack.heading.getOpposite(), tubeStack.color, false); if (remainder != null) { if (injectStack(remainder, tubeStack.heading.getOpposite(), tubeStack.color, true)) { tubeStack.stack = remainder; tubeStack.progress = 0; tubeStack.oldProgress = 0; tubeStack.heading = tubeStack.heading.getOpposite(); this.tube.sendUpdatePacket(); } else { EntityItem entity = new EntityItem(this.tube.getWorld(), this.tube.getX() + 0.5 + tubeStack.heading.offsetX * tubeStack.progress * 0.5, this.tube.getY() + 0.5 + tubeStack.heading.offsetY * tubeStack.progress * 0.5, this.tube.getZ() + 0.5 + tubeStack.heading.offsetX * tubeStack.progress * 0.5, remainder); this.tube.getWorld().spawnEntityInWorld(entity); iterator.remove(); } } else { iterator.remove(); } } else { iterator.remove(); } } else if (tubeStack.idleCounter > 100) { iterator.remove(); } } } public boolean retrieveStack(TileEntity target, ForgeDirection dirToRetrieveInto, ItemStack filter) { return retrieveStack(target, dirToRetrieveInto, filter, TubeColor.NONE); } public boolean retrieveStack(TileEntity target, ForgeDirection dirToRetrieveInto, ItemStack filter, TubeColor color) { if (tube.getWorld() == null) return false; TubeStack stack = new TubeStack(filter, null, color); stack.setTarget(target, dirToRetrieveInto); Pair<ForgeDirection, TileEntity> result = getHeadingForItem(stack, false); if (result == null) return false; int fuzzySetting = 0; if (target instanceof IFuzzyRetrieving) { fuzzySetting = ((IFuzzyRetrieving) target).getFuzzySetting(); } ItemStack extractedItem = null; if (result.getValue() instanceof TileManager) {// Exception for managers, the result can only end up as a manager if the pulling inventory was // a manager. TileEntity managedInventory = ((TileManager) result.getValue()) .getTileCache(((TileManager) result.getValue()).getFacingDirection()); extractedItem = IOHelper.extract(managedInventory, result.getKey().getOpposite(), filter, false, false, fuzzySetting); } else if (filter != null) { extractedItem = IOHelper.extract(result.getValue(), result.getKey().getOpposite(), filter, !(target instanceof TileManager), false, fuzzySetting); } else { extractedItem = IOHelper.extract(result.getValue(), result.getKey().getOpposite(), false); } if (extractedItem == null) throw new IllegalArgumentException("This isn't possible!"); stack = new TubeStack(extractedItem, result.getKey().getOpposite(), color); stack.setTarget(target, dirToRetrieveInto); PneumaticTube tube = MultipartCompatibility.getPart(this.tube.getWorld(), result.getValue().xCoord - result.getKey().offsetX, result.getValue().yCoord - result.getKey().offsetY, result.getValue().zCoord - result.getKey().offsetZ, PneumaticTube.class); if (tube == null) throw new IllegalArgumentException("wieeeeerd!"); return tube.getLogic().injectStack(stack, result.getKey().getOpposite(), false); } /** * This method gets the end target and heading for a TubeStack. When the tubestack's target variable is null, this is an exporting item, meaning * the returned target will be the TileEntity the item is going to transport to. When the tubestack's target variable is not not, the item is * being retrieved to this inventory. The returned target is the inventory the item came/should come from. * * @param simulate * The only difference between simulate and not simulate is the fact that the round robin handling will be updated in non-simulate. * @param from * The direction this item came from, this direction will never be a valid heading. Is null in normal item routing, as the from * direction IS a valid output. */ @SuppressWarnings({ "rawtypes", "unchecked" }) private Pair<ForgeDirection, TileEntity> getHeadingForItem(TubeStack stack, boolean simulate) { Map<TubeNode, Integer> distances = new HashMap<TubeNode, Integer>(); Queue<TubeNode> traversingNodes = new LinkedBlockingQueue<TubeNode>(); Queue<ForgeDirection> trackingExportDirection = new LinkedBlockingQueue<ForgeDirection>(); Map<TubeEdge, ForgeDirection> validDestinations = new LinkedHashMap<TubeEdge, ForgeDirection>();// using a LinkedHashMap so the order doesn't // change, used for round robin. if (getNode() != null) { distances.put(getNode(), 0);// make this the origin. traversingNodes.add(getNode()); } boolean firstRun = true; int closestDest = 0; while (!traversingNodes.isEmpty()) { TubeNode node = traversingNodes.poll(); if (node.edges == null) node.init(); ForgeDirection heading = firstRun ? null : trackingExportDirection.poll(); for (int i = 0; i < 6; i++) { if (firstRun) heading = ForgeDirection.getOrientation(i); if (node.edges != null) { TubeEdge edge = node.edges[i]; if (edge != null && canPassThroughMask(stack.color, edge.colorMask)) {// if this item can travel through this color mask proceed. Integer distance = distances.get(edge.target); if (distance == null || distances.get(node) + edge.distance < distance) { distances.put(edge.target, distances.get(node) + edge.distance); if (edge.target.target instanceof PneumaticTube) { traversingNodes.add(edge.target); trackingExportDirection.add(heading); } else if (stack.getTarget(tube.getWorld()) == null && edge.isValidForExportItem(stack.stack) || stack.heading == null && edge.isValidForImportItem(stack) || stack.heading != null && stack.getTarget(tube.getWorld()) == edge.target.target && edge.targetConnectionSide.getOpposite() == stack .getTargetEntryDir()) { validDestinations.put(edge, stack.heading == null ? edge.targetConnectionSide : heading); } } } } } // Check the distances of the current breadth first search layer. if no points are closer than the currently valid destination(s), we're // done searching. boolean isDoneSearching = true; closestDest = getClosestDestination(validDestinations.keySet(), distances); for (TubeNode checkingNode : traversingNodes) { if (distances.get(checkingNode) <= closestDest) { isDoneSearching = false; break; } } if (isDoneSearching) break; firstRun = false; } if (validDestinations.size() == 0) { if (stack.getTarget(tube.getWorld()) != null && stack.heading != null && !simulate) { stack.setTarget(null, ForgeDirection.UNKNOWN);// if we can't reach the retrieving target anymore, reroute as normal. return getHeadingForItem(stack, simulate); } else { return null; } } List<Pair<ForgeDirection, TileEntity>> validDirections = new ArrayList<Pair<ForgeDirection, TileEntity>>(); for (Map.Entry<TubeEdge, ForgeDirection> entry : validDestinations.entrySet()) { if (distances.get(entry.getKey().target) == closestDest) { validDirections.add(new ImmutablePair(entry.getValue(), entry.getKey().target.target)); } } // handle round robin if (!simulate) roundRobinCounter++; if (roundRobinCounter >= validDirections.size()) roundRobinCounter = 0; return validDirections.get(roundRobinCounter); } private boolean canPassThroughMask(TubeColor color, int colorMask) { return color == TubeColor.NONE || Integer.bitCount(colorMask) == 0 || Integer.bitCount(colorMask) == 1 && (colorMask & 1 << color.ordinal()) != 0; } /** * Used to get an indication for when the search is done. * * @param validDestinations * @param distances * @return */ private int getClosestDestination(Set<TubeEdge> validDestinations, Map<TubeNode, Integer> distances) { int minDest = Integer.MAX_VALUE; for (TubeEdge edge : validDestinations) { if (distances.get(edge.target) < minDest) { minDest = distances.get(edge.target); } } return minDest; } @Override public boolean injectStack(ItemStack stack, ForgeDirection from, TubeColor itemColor, boolean simulate) { return injectStack(new TubeStack(stack.copy(), from, itemColor), from, simulate); } public boolean injectStack(TubeStack stack, ForgeDirection from, boolean simulate) { if (tube.getWorld() != null && tube.getWorld().isRemote) throw new IllegalArgumentException("[Pneumatic Tube] You can't inject items from the client side!"); Pair<ForgeDirection, TileEntity> heading = getHeadingForItem(stack, simulate); if (heading != null && heading.getKey() != from.getOpposite()) { if (!simulate) { tubeStacks.add(stack); tube.sendUpdatePacket(); } return true; } else { return false; } } public void writeToNBT(NBTTagCompound tag) { NBTTagList tagList = new NBTTagList(); for (TubeStack stack : tubeStacks) { NBTTagCompound stackTag = new NBTTagCompound(); stack.writeToNBT(stackTag); tagList.appendTag(stackTag); } tag.setTag("tubeStacks", tagList); tag.setInteger("roundRobinCounter", roundRobinCounter); } public void readFromNBT(NBTTagCompound tag) { tubeStacks = new ArrayList<TubeStack>(); NBTTagList tagList = tag.getTagList("tubeStacks", 10); for (int i = 0; i < tagList.tagCount(); i++) { NBTTagCompound stackTag = tagList.getCompoundTagAt(i); tubeStacks.add(TubeStack.loadFromNBT(stackTag)); } roundRobinCounter = tag.getInteger("roundRobinCounter"); } public void writeData(DataOutput buffer) throws IOException { NBTTagCompound tag = new NBTTagCompound(); writeToNBT(tag); PacketHelper.writeNBT(buffer, tag); } public void readData(DataInput buffer) throws IOException { readFromNBT(PacketHelper.readNBT(buffer)); } @SideOnly(Side.CLIENT) public void renderDynamic(Vec3d pos, float partialTick) { GL11.glPushMatrix(); GL11.glTranslated(pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5); for (TubeStack stack : tubeStacks) { stack.render(partialTick); } GL11.glPopMatrix(); } /** * Contains the distance and a reference to a connected node, directional. */ public class TubeNode { public TubeEdge[] edges; public Object target; // Either a TileEntity (inventory), or a PneumaticTube public TubeNode(TileEntity te) { target = te; } public TubeNode(PneumaticTube tube) { target = tube; } public void init() { PneumaticTube nodeTube = (PneumaticTube) target; edges = new TubeEdge[6]; for (int i = 0; i < 6; i++) { if (tube.connections[i]) { TileEntity neighbor = nodeTube.getTileCache(ForgeDirection.getOrientation(i)); PneumaticTube tube = nodeTube.getPartCache(ForgeDirection.getOrientation(i)); int colorMask = nodeTube.getColor(ForgeDirection.getOrientation(i)) != TubeColor.NONE ? 1 << nodeTube.getColor(ForgeDirection.getOrientation(i)).ordinal() : 0; if (tube != null) { int dist = tube.getWeight(); if (tube.getColor(ForgeDirection.getOrientation(i).getOpposite()) != TubeColor.NONE) colorMask = colorMask | 1 << tube.getColor(ForgeDirection.getOrientation(i).getOpposite()).ordinal(); ForgeDirection curDir = ForgeDirection.getOrientation(i); while (!tube.isCrossOver && tube.initialized) {// traverse the tubes for (ForgeDirection dir : ForgeDirection.VALID_DIRECTIONS) { if (dir != curDir.getOpposite() && tube.connections[dir.ordinal()]) { curDir = dir; break; } } neighbor = tube.getTileCache(curDir); if (neighbor != null) { if (tube.getColor(curDir) != TubeColor.NONE) { colorMask = colorMask | 1 << tube.getColor(curDir).ordinal(); } tube = tube.getPartCache(curDir); if (tube == null) { edges[i] = new TubeEdge(new TubeNode(neighbor), curDir, colorMask, dist + (neighbor instanceof IWeightedTubeInventory ? ((IWeightedTubeInventory) neighbor).getWeight(curDir) : 0)); break; } else { if (!tube.initialized) break; dist += tube.getWeight(); if (tube.getColor(curDir.getOpposite()) != TubeColor.NONE) { colorMask = colorMask | 1 << tube.getColor(curDir.getOpposite()).ordinal(); } } } } if (tube != null && tube != nodeTube && tube.getLogic() != null && tube.getLogic().getNode() != null) edges[i] = new TubeEdge(tube.getLogic().getNode(), curDir, colorMask, dist);// only add an edge that isn't just connected // to itself. } else if (neighbor != null) { edges[i] = new TubeEdge(new TubeNode(neighbor), ForgeDirection.getOrientation(i), colorMask, neighbor instanceof IWeightedTubeInventory ? ((IWeightedTubeInventory) neighbor) .getWeight(ForgeDirection.getOrientation(i)) : 0); } } } } } public class TubeEdge { public TubeNode target; private final ForgeDirection targetConnectionSide; public final int distance; public int colorMask; // bitmask of disallowed colored items through the tube. Least significant bit is TubeColor.values()[0]. only least // significant 16 bits are used public TubeEdge(TubeNode target, ForgeDirection targetConnectionSide, int colorMask, int distance) { this.target = target; this.targetConnectionSide = targetConnectionSide; this.distance = distance; this.colorMask = colorMask; } public boolean isValidForExportItem(ItemStack stack) { if (target.target instanceof PneumaticTube) return false; if (target.target instanceof IWeightedTubeInventory && ((IWeightedTubeInventory) target.target).getWeight(targetConnectionSide) > 10000) return true; ItemStack remainder = IOHelper.insert((TileEntity) target.target, stack.copy(), targetConnectionSide.getOpposite(), true); return remainder == null || remainder.stackSize < stack.stackSize; } public boolean isValidForImportItem(TubeStack stack) { if (target.target instanceof PneumaticTube) return false; TileEntity stackTarget = stack.getTarget(((TileEntity) target.target).getWorldObj()); if (stackTarget instanceof TileManager) { TileManager retrievingManager = (TileManager) stackTarget; if (target.target instanceof TileManager) { TileManager pulledManager = (TileManager) target.target; if (retrievingManager == pulledManager) return false; if (pulledManager.priority >= retrievingManager.priority) return false;// Only managers with a higher priority are allowed to pull. if (pulledManager.filterColor != TubeColor.NONE && retrievingManager.filterColor != TubeColor.NONE && retrievingManager.filterColor != pulledManager.filterColor) return false; TileEntity managedInventory = pulledManager.getTileCache(pulledManager.getFacingDirection()); return IOHelper.extract(managedInventory, pulledManager.getFacingDirection().getOpposite(), stack.stack, false, true) != null; } } if (stack.stack != null) { int fuzzySetting = 0; if (stackTarget instanceof IFuzzyRetrieving) { fuzzySetting = ((IFuzzyRetrieving) stackTarget).getFuzzySetting(); } return IOHelper.extract((TileEntity) target.target, targetConnectionSide.getOpposite(), stack.stack, !(stackTarget instanceof TileManager), true, fuzzySetting) != null; } else { return IOHelper.extract((TileEntity) target.target, targetConnectionSide.getOpposite(), true) != null; } } } }