Bridge
 Bridge
| |
| About | |
|---|---|
| ID | Bridge |
| Self Triggered | No |
| Clickable | Yes |
| Input | Yes |
| Output | No |
| Rail | No |
| Block | Bridge material |
 Sign Format
| |
| Second line | [Bridge] |
| Craftbook Page | |
A Bridge is a Craftbook mechanism that removes a wide, flat section of blocks to storage when activated and then restores them when deactivated. The length of the bridge is set by the placement of two specially marked signs that also activate the mechanism. These are the horizontal equivalent to doors.
- Their open/closed state is toggled by right clicking either of the marker signs, or;
- by a redstone signal running straight into one of the signs.
The width of the bridge is determined by the width of the valid "borders" running sideways from the block under/over the [Bridge] sign.
Construction
Bridges consist of these parts:
- Start Row: a row of the same material to be used in the bridge opening with a Sign either above or below the "middle" block. The second line of the sign must be [Bridge]. The sign does not have to be the actual middle - this start row may extend up to 16 blocks in either direction from the sign, up to a total maximum width of 33.
- The bridge opening is an area between the two ends, at least one block long, and no more than 15 blocks long. It may be filled with the same material as the ends, or left empty.
- End Row: the opposite end of the bridge is like the first, and must have a Sign at the matching position on this side. The row must be the same material as the Start Row, with blocks in matching positions -- any break in either end row will terminate the bridge-width at that location.
Construction and operation details:
- The signs at either end can be used to activate the bridge by right-clicking them, but then they must be facing out from the open area of the bridge and each must have a chest within one block distance (under, over, or at the side) to hold the blocks removed.
- The blocks can be stored in Chest, Double Chest, or Trapped versions; no other containers will work.
- The bridge Signs may be either Wall signs or Standing signs, it makes no difference to their operation - although their direction does. And a Standing Sign can be diagonal, which will then never be able to be activated.
- The bridge Signs may be either both above the bridge, or both below the bridge - but they must be in the same location on either side of the bridge. If there is a "valid bridge" both above and below the sign, then the area below the signs will be used as the bridge, and the area above will be ignored. You can force the area below to be invalid by using different block types underneath the bridge signs.
- If both ends are able to be used, and you are using a chest at each end, then you may find that the blocks are "moved" from one end to the other over time, so that the one side is out of blocks and unable to operate. To prevent this, you may wish to limit activation to only one end of the bridge, which can be done in several ways:
- Place the [Bridge] sign on that side facing any direction other than the opening. (You could actually have a second perpendicular bridge, which it operates, it could still be a valid ending of the other bridge; or you can use diagonal placement which will never operate)
- Use [Bridge End] instead of [Bridge]; this will give a player who attempts to activate the [Bridge End] the message
You cannot activate the bridge from this side. - Do not place any chest within range of this [Bridge] sign.
- Place both signs under the bridge instead of over it, and use Redstone to activate the bridge on only one side.
- If the area of the bridge is filled in before creating it the chest(s) by the signs(s) may be empty. These chests may hold other types of blocks without affecting the operation of the bridge.
- The area of the bridge may be left empty before creating it, but then blocks of the bridge material need to be placed in the chest(s) so the opening will be filled in by activation. The opening will only be partially filled if there are not enough blocks provided.
- The cAsE of the letters in the signs does not matter: all of BRIDGE, Bridge, or bridge will work.
An example of making a CraftBook bridge is here: Dorn284's Bridge Tutorial!]
Materials
The server allows any one of stone, dirt, cobblestone, planks, slabs, glass, wool, double stone slabs, stone slabs, brick, bookshelves, snow blocks, or clay blocks to be used for the bridge material.
Blocks that have variations do NOT meet the requirement for construction of using only one material. Craftbook sees dirt with grass on it as "different" from regular dirt for instance.
As of December 2018 stone, stone slabs, cobble, wood, log, and clay blocks have been tested - user:bytebasher.
Operation
Right-clicking either sign will operate the door, closing it if open or vice versa. It will also be activated by a redstone signal running straight into to the sign. A signal beside it, or under it will not activate it. Activating the door toggles its state so making an closed door while the redstone is off means that it will close when the redstone is powered.
Uses
Although intended for use as a retractable bridge, other possibilities are:
- flood gates to unleash water or lava on unsuspecting players..
- Dumping enemies into a pit.
- Reveal storage or valuable gear when you need to use it, leaving it hidden the rest of the time..
- Open a room to the sky on command.