TileEntityAirCannon.java 文件源码

private synchronized boolean fire() {
    Entity itemShot = getCloseEntityIfUpgraded();
    if (getPressure() >= PneumaticValues.MIN_PRESSURE_AIR_CANNON && (itemShot != null || !inventory.getStackInSlot(CANNON_SLOT).isEmpty())) {
        double[] velocity = getVelocityVector(heightAngle, rotationAngle, getForce());
        addAir((int) (-500 * getForce()));
        boolean shootingInventory = false;
        if (itemShot == null) {
            shootingInventory = true;
            itemShot = getPayloadEntity();
            if (itemShot instanceof EntityItem) {
                inventory.setStackInSlot(CANNON_SLOT, ItemStack.EMPTY);
                if (getUpgrades(EnumUpgrade.BLOCK_TRACKER) > 0) {
                    trackedItems.add((EntityItem) itemShot);
                }
            } else {
                inventory.extractItem(CANNON_SLOT, 1, false);
            }
        } else if (itemShot instanceof EntityPlayer) {
            EntityPlayerMP entityplayermp = (EntityPlayerMP) itemShot;
            if (entityplayermp.connection.getNetworkManager().isChannelOpen()) {

                //This is a nasty hack to get around "player moved wrongly!" messages, which can be caused if player movement
                // triggers a player teleport (e.g. player moves onto pressure plate, triggers air cannon with an entity tracker).
                entityplayermp.invulnerableDimensionChange = true;

                entityplayermp.setPositionAndUpdate(getPos().getX() + 0.5D, getPos().getY() + 1.8D, getPos().getZ() + 0.5D);
            }
        }

        if (itemShot.isRiding()) {
            itemShot.dismountRidingEntity();
        }

        itemShot.setPosition(getPos().getX() + 0.5D, getPos().getY() + 1.8D, getPos().getZ() + 0.5D);
        NetworkHandler.sendToAllAround(new PacketSetEntityMotion(itemShot, velocity[0], velocity[1], velocity[2]),
                new TargetPoint(getWorld().provider.getDimension(), getPos().getX(), getPos().getY(), getPos().getZ(), 64));

        if (itemShot instanceof EntityFireball) {
            velocity[0] *= 0.05D;
            velocity[1] *= 0.05D;
            velocity[2] *= 0.05D;
        }

        itemShot.motionX = velocity[0];
        itemShot.motionY = velocity[1];
        itemShot.motionZ = velocity[2];

        itemShot.onGround = false;
        itemShot.collided = false;
        itemShot.collidedHorizontally = false;
        itemShot.collidedVertically = false;
        if (itemShot instanceof EntityLivingBase) ((EntityLivingBase) itemShot).setJumping(true);

        if (shootingInventory && !getWorld().isRemote) getWorld().spawnEntity(itemShot);

        for (int i = 0; i < 10; i++) {
            double velX = velocity[0] * 0.4D + (rand.nextGaussian() - 0.5D) * 0.05D;
            double velY = velocity[1] * 0.4D + (rand.nextGaussian() - 0.5D) * 0.05D;
            double velZ = velocity[2] * 0.4D + (rand.nextGaussian() - 0.5D) * 0.05D;
            NetworkHandler.sendToAllAround(new PacketSpawnParticle(EnumParticleTypes.SMOKE_LARGE, getPos().getX() + 0.5D, getPos().getY() + 0.7D, getPos().getZ() + 0.5D, velX, velY, velZ), getWorld());
        }
        NetworkHandler.sendToAllAround(new PacketPlaySound(Sounds.CANNON_SOUND, SoundCategory.BLOCKS, getPos().getX(), getPos().getY(), getPos().getZ(), 1.0F, rand.nextFloat() / 4F + 0.75F, true), getWorld());
        return true;
    } else {
        return false;
    }
}