Java tutorial
/** * Copyright (c) 2011-2015, SpaceToad and the BuildCraft Team * 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.silicon; import java.util.LinkedList; import java.util.List; import io.netty.buffer.ByteBuf; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.tileentity.TileEntity; import net.minecraft.util.AxisAlignedBB; import net.minecraft.util.ResourceLocation; import net.minecraftforge.common.util.ForgeDirection; import buildcraft.api.core.Position; import buildcraft.api.core.SafeTimeTracker; import buildcraft.api.power.ILaserTarget; import buildcraft.api.power.ILaserTargetBlock; import buildcraft.api.tiles.IControllable; import buildcraft.api.tiles.IHasWork; import buildcraft.core.Box; import buildcraft.core.EntityLaser; import buildcraft.core.LaserData; import buildcraft.core.RFBattery; import buildcraft.core.TileBuildCraft; public class TileLaser extends TileBuildCraft implements IHasWork, IControllable { private static final float LASER_OFFSET = 2.0F / 16.0F; private static final short POWER_AVERAGING = 100; public LaserData laser = new LaserData(); private final SafeTimeTracker laserTickTracker = new SafeTimeTracker(10); private final SafeTimeTracker searchTracker = new SafeTimeTracker(100, 100); private final SafeTimeTracker networkTracker = new SafeTimeTracker(20, 3); private ILaserTarget laserTarget; private int powerIndex = 0; private short powerAverage = 0; private final short[] power = new short[POWER_AVERAGING]; public TileLaser() { super(); this.setBattery(new RFBattery(10000, 250, 0)); } @Override public void initialize() { super.initialize(); if (laser == null) { laser = new LaserData(); } laser.isVisible = false; laser.head = new Position(xCoord, yCoord, zCoord); laser.tail = new Position(xCoord, yCoord, zCoord); } @Override public void updateEntity() { super.updateEntity(); laser.iterateTexture(); if (worldObj.isRemote) { return; } // If a gate disabled us, remove laser and do nothing. if (mode == IControllable.Mode.Off) { removeLaser(); return; } // Check for any available tables at a regular basis if (canFindTable()) { findTable(); } // If we still don't have a valid table or the existing has // become invalid, we disable the laser and do nothing. if (!isValidTable()) { removeLaser(); return; } // Disable the laser and do nothing if no energy is available. if (getBattery().getEnergyStored() == 0) { removeLaser(); return; } // We have a table and can work, so we create a laser if // necessary. laser.isVisible = true; // We have a laser and may update it if (laser != null && canUpdateLaser()) { updateLaser(); } // Consume power and transfer it to the table. int localPower = getBattery().useEnergy(0, getMaxPowerSent(), false); laserTarget.receiveLaserEnergy(localPower); if (laser != null) { pushPower(localPower); } onPowerSent(localPower); sendNetworkUpdate(); } protected int getMaxPowerSent() { return 40; } protected void onPowerSent(int power) { } protected boolean canFindTable() { return searchTracker.markTimeIfDelay(worldObj); } protected boolean canUpdateLaser() { return laserTickTracker.markTimeIfDelay(worldObj); } protected boolean isValidTable() { if (laserTarget == null || laserTarget.isInvalidTarget() || !laserTarget.requiresLaserEnergy()) { return false; } return true; } protected void findTable() { int meta = getBlockMetadata(); int minX = xCoord - 5; int minY = yCoord - 5; int minZ = zCoord - 5; int maxX = xCoord + 5; int maxY = yCoord + 5; int maxZ = zCoord + 5; switch (ForgeDirection.getOrientation(meta)) { case WEST: maxX = xCoord; break; case EAST: minX = xCoord; break; case DOWN: maxY = yCoord; break; case UP: minY = yCoord; break; case NORTH: maxZ = zCoord; break; default: case SOUTH: minZ = zCoord; break; } List<ILaserTarget> targets = new LinkedList<ILaserTarget>(); for (int x = minX; x <= maxX; ++x) { for (int y = minY; y <= maxY; ++y) { for (int z = minZ; z <= maxZ; ++z) { if (worldObj.getBlock(x, y, z) instanceof ILaserTargetBlock) { TileEntity tile = worldObj.getTileEntity(x, y, z); if (tile instanceof ILaserTarget) { ILaserTarget table = (ILaserTarget) tile; if (table.requiresLaserEnergy()) { targets.add(table); } } } } } } if (targets.isEmpty()) { return; } laserTarget = targets.get(worldObj.rand.nextInt(targets.size())); } protected void updateLaser() { int meta = getBlockMetadata(); double px = 0, py = 0, pz = 0; switch (ForgeDirection.getOrientation(meta)) { case WEST: px = -LASER_OFFSET; break; case EAST: px = LASER_OFFSET; break; case DOWN: py = -LASER_OFFSET; break; case UP: py = LASER_OFFSET; break; case NORTH: pz = -LASER_OFFSET; break; case SOUTH: default: pz = LASER_OFFSET; break; } Position head = new Position(xCoord + 0.5 + px, yCoord + 0.5 + py, zCoord + 0.5 + pz); Position tail = new Position(laserTarget.getXCoord() + 0.475 + (worldObj.rand.nextFloat() - 0.5) / 5F, laserTarget.getYCoord() + 9F / 16F, laserTarget.getZCoord() + 0.475 + (worldObj.rand.nextFloat() - 0.5) / 5F); laser.head = head; laser.tail = tail; if (!laser.isVisible) { laser.isVisible = true; } } protected void removeLaser() { if (laser.isVisible) { laser.isVisible = false; // force sending the network update even if the network tracker // refuses. super.sendNetworkUpdate(); } } @Override public void sendNetworkUpdate() { if (networkTracker.markTimeIfDelay(worldObj)) { super.sendNetworkUpdate(); } } @Override public void readFromNBT(NBTTagCompound nbttagcompound) { super.readFromNBT(nbttagcompound); } @Override public void writeToNBT(NBTTagCompound nbttagcompound) { super.writeToNBT(nbttagcompound); } @Override public void readData(ByteBuf stream) { laser = new LaserData(); laser.readData(stream); powerAverage = stream.readShort(); } @Override public void writeData(ByteBuf stream) { laser.writeData(stream); stream.writeShort(powerAverage); } @Override public void invalidate() { super.invalidate(); removeLaser(); } @Override public boolean hasWork() { return isValidTable(); } private void pushPower(int received) { powerAverage -= power[powerIndex]; powerAverage += received; power[powerIndex] = (short) received; powerIndex++; if (powerIndex == power.length) { powerIndex = 0; } } public ResourceLocation getTexture() { double avg = powerAverage / POWER_AVERAGING; if (avg <= 10.0) { return EntityLaser.LASER_TEXTURES[0]; } else if (avg <= 20.0) { return EntityLaser.LASER_TEXTURES[1]; } else if (avg <= 30.0) { return EntityLaser.LASER_TEXTURES[2]; } else { return EntityLaser.LASER_TEXTURES[3]; } } @Override public AxisAlignedBB getRenderBoundingBox() { return new Box(this).extendToEncompass(laser.tail).getBoundingBox(); } @Override public boolean acceptsControlMode(Mode mode) { return mode == IControllable.Mode.On || mode == IControllable.Mode.Off; } }