Teleporters

Your implementation is getting towards more and more complex features. In this exercise, you will add a teleporter that transports the player to a different location. A teleporter is more complex than the coins, keys and doors in the previous chapters. You will need to create an own data structure for it. The following steps are necessary:

1. create a teleporter class

2. add a teleporter to the level

3. draw the teleporter

4. teleport the player

Create a teleporter class

The reason you need a new class is that you need not only to store where a teleporter is, but also where it should transport the player. A single tile on the map cannot hold all that information, considering you may want to have mulitple teleporters on the map.

Create a new class Teleporter that contains the x/y-position of a teleporter and the position it teleports to:

class Teleporter(BaseModel):
    x: int
    y: int
    target_x: int
    target_y: int

Add a teleporter to the level

To add one or more teleporters to the dungeon, you also need to add a single line to the DungeonGame class:

teleporters: list[Teleporter] = []

Now add a teleporter in the start_game() function right after the level attribute:

teleporters=[
    Teleporter(x=1, y=2, target_x=2, target_y=8),
]

Note that you do not need to edit the level map!

Draw the teleporter

One drawback of having teleporters as their own attribute is that you need to draw them explicitly. In the draw() function, add the following paragraph after drawing the level tiles:

# draw teleporters
for t in game.teleporters:
    draw_tile(frame, x=t.x, y=t.y, image=images["teleporter"])

Hint

Now you should see the teleporter. Although you can walk into it, it does not teleport anything:

Teleport the player

A teleporter should move the player as soon as they step on it. In a first attempt, we will simply check all teleporters in the move_player() function. Complete the following code:

for t in game.teleporters:
    if game.x == t.x and ...:
        game.x = t.target_x
        ...

As soon as you add the complete section at the bottom of move_player(), your teleporter should start working!

Hint

The approach with the loop is not the most efficient one, but Python is more than fast enough to get away with it.