Java tutorial
/** * Copyright (c) 2011-2015, SpaceToad and the BuildCraft Team * http://www.mod-buildcraft.com * <p/> * 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.robotics; import java.util.Arrays; import java.util.List; import io.netty.buffer.ByteBuf; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.inventory.IInventory; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.server.MinecraftServer; import buildcraft.BuildCraftCore; import buildcraft.BuildCraftRobotics; import buildcraft.api.core.IZone; import buildcraft.api.core.SafeTimeTracker; import buildcraft.api.items.IMapLocation; import buildcraft.api.items.INamedItem; import buildcraft.core.ItemMapLocation; import buildcraft.core.lib.block.TileBuildCraft; import buildcraft.core.lib.inventory.SimpleInventory; import buildcraft.core.lib.network.Packet; import buildcraft.core.lib.network.command.CommandWriter; import buildcraft.core.lib.network.command.PacketCommand; import buildcraft.core.lib.utils.NetworkUtils; import buildcraft.robotics.gui.ContainerZonePlan; import buildcraft.robotics.map.MapWorld; public class TileZonePlan extends TileBuildCraft implements IInventory { public static final int RESOLUTION = 2048; public static final int CRAFT_TIME = 120; private static final int PREVIEW_BLOCKS_PER_PIXEL = 10; private static int RESOLUTION_CHUNKS = RESOLUTION >> 4; public int chunkStartX, chunkStartZ; public short progress = 0; public String mapName = ""; private final byte[] previewColors = new byte[80]; private final SimpleInventory inv = new SimpleInventory(3, "inv", 64); private final SafeTimeTracker previewRecalcTimer = new SafeTimeTracker(100); private boolean previewColorsPushed = false; private ZonePlan[] selectedAreas = new ZonePlan[16]; private int currentSelectedArea = 0; public byte[] getPreviewTexture(boolean force) { if (!previewColorsPushed || force) { previewColorsPushed = true; return previewColors; } return null; } @Override public void initialize() { super.initialize(); int cx = xCoord >> 4; int cz = zCoord >> 4; chunkStartX = cx - RESOLUTION_CHUNKS / 2; chunkStartZ = cz - RESOLUTION_CHUNKS / 2; } @Override public void updateEntity() { super.updateEntity(); if (worldObj.isRemote) { return; } if (previewRecalcTimer.markTimeIfDelay(worldObj)) { recalculatePreview(); } if (inv.getStackInSlot(0) != null && inv.getStackInSlot(1) == null && inv.getStackInSlot(0).getItem() instanceof ItemMapLocation) { if (progress < CRAFT_TIME) { progress++; if (worldObj.getTotalWorldTime() % 5 == 0) { sendNetworkUpdate(); } } else { ItemStack stack = inv.decrStackSize(0, 1); if (selectedAreas[currentSelectedArea] != null) { ItemMapLocation.setZone(stack, selectedAreas[currentSelectedArea]); ((INamedItem) stack.getItem()).setName(stack, mapName); } inv.setInventorySlotContents(1, stack); } } else if (progress != 0) { progress = 0; sendNetworkUpdate(); } } private void recalculatePreview() { byte[] newPreviewColors = new byte[80]; MapWorld mw = BuildCraftRobotics.manager.getWorld(worldObj); for (int y = 0; y < 8; y++) { for (int x = 0; x < 10; x++) { int tx = (x * PREVIEW_BLOCKS_PER_PIXEL) - (5 * PREVIEW_BLOCKS_PER_PIXEL) + (PREVIEW_BLOCKS_PER_PIXEL / 2); int ty = (y * PREVIEW_BLOCKS_PER_PIXEL) - (4 * PREVIEW_BLOCKS_PER_PIXEL) + (PREVIEW_BLOCKS_PER_PIXEL / 2); newPreviewColors[y * 10 + x] = (byte) mw.getColor(xCoord - (xCoord % PREVIEW_BLOCKS_PER_PIXEL) + tx, zCoord - (zCoord % PREVIEW_BLOCKS_PER_PIXEL) + ty); } } if (!Arrays.equals(previewColors, newPreviewColors)) { System.arraycopy(newPreviewColors, 0, previewColors, 0, 80); sendNetworkUpdate(); } } @Override public void writeToNBT(NBTTagCompound nbt) { super.writeToNBT(nbt); nbt.setString("name", mapName); NBTTagCompound invNBT = new NBTTagCompound(); inv.writeToNBT(invNBT); nbt.setTag("inv", invNBT); for (int i = 0; i < selectedAreas.length; ++i) { if (selectedAreas[i] != null) { NBTTagCompound subNBT = new NBTTagCompound(); selectedAreas[i].writeToNBT(subNBT); nbt.setTag("selectedArea[" + i + "]", subNBT); } } } @Override public void readFromNBT(NBTTagCompound nbt) { super.readFromNBT(nbt); mapName = nbt.getString("name"); if (mapName == null) { mapName = ""; } inv.readFromNBT(nbt.getCompoundTag("inv")); for (int i = 0; i < selectedAreas.length; ++i) { if (nbt.hasKey("selectedArea[" + i + "]")) { selectedAreas[i] = new ZonePlan(); selectedAreas[i].readFromNBT(nbt.getCompoundTag("selectedArea[" + i + "]")); } } } @Override public void writeData(ByteBuf stream) { stream.writeShort(progress); NetworkUtils.writeUTF(stream, mapName); stream.writeBytes(previewColors, 0, 80); } @Override public void readData(ByteBuf stream) { progress = stream.readShort(); mapName = NetworkUtils.readUTF(stream); stream.readBytes(previewColors, 0, 80); previewColorsPushed = false; } private void importMap(ItemStack stack) { if (stack != null && stack.getItem() instanceof IMapLocation) { final IZone zone = ((IMapLocation) stack.getItem()).getZone(stack); if (zone != null && zone instanceof ZonePlan) { selectedAreas[currentSelectedArea] = (ZonePlan) zone; for (EntityPlayer e : (List<EntityPlayer>) MinecraftServer.getServer() .getConfigurationManager().playerEntityList) { if (e.openContainer != null && e.openContainer instanceof ContainerZonePlan && ((ContainerZonePlan) e.openContainer).getTile() == this) { Packet p = new PacketCommand(e.openContainer, "areaLoaded", new CommandWriter() { public void write(ByteBuf data) { ((ZonePlan) zone).writeData(data); } }); BuildCraftCore.instance.sendToPlayer(e, p); } } } } } public ZonePlan selectArea(int index) { if (selectedAreas[index] == null) { selectedAreas[index] = new ZonePlan(); } currentSelectedArea = index; return selectedAreas[index]; } public void setArea(int index, ZonePlan area) { selectedAreas[index] = area; } @Override public int getSizeInventory() { return inv.getSizeInventory(); } @Override public ItemStack getStackInSlot(int slotId) { return inv.getStackInSlot(slotId); } @Override public ItemStack decrStackSize(int slotId, int count) { return inv.decrStackSize(slotId, count); } @Override public ItemStack getStackInSlotOnClosing(int slotId) { return inv.getStackInSlotOnClosing(slotId); } @Override public void setInventorySlotContents(int slotId, ItemStack itemstack) { inv.setInventorySlotContents(slotId, itemstack); if (!worldObj.isRemote && slotId == 2) { importMap(itemstack); } } @Override public String getInventoryName() { return inv.getInventoryName(); } @Override public boolean hasCustomInventoryName() { return inv.hasCustomInventoryName(); } @Override public int getInventoryStackLimit() { return inv.getInventoryStackLimit(); } @Override public boolean isUseableByPlayer(EntityPlayer entityplayer) { return inv.isUseableByPlayer(entityplayer); } @Override public void openInventory() { inv.openInventory(); } @Override public void closeInventory() { inv.closeInventory(); } @Override public boolean isItemValidForSlot(int i, ItemStack itemstack) { return inv.isItemValidForSlot(i, itemstack); } }