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Kk1496

Text adventure user input

6 posts in this topic

I am trying to allow the player to travel to different rooms. Each room (t1, t2, and t3) has a vector of exits. When I run the program, the player is able to travel to a room. However, it automatically places the user back in the starter room. Is there a better way that i should be checking this?
 
Character test = new Character ("Test", "Sample character", t1, null);
test.printCharacter();
 
t1.printLocation();
 
Scanner input = new Scanner(System.in);
test.setCommand(input.nextLine());
 
//Options for t1
if (test.getCommand().equals(t1.getExits().get(0).getDirName())) {
test.setLocation(t2);
t2.printLocation();
t2.visited = true;
}
 
if (test.getCommand().equals(t1.getExits().get(1).getDirection())) {
test.setLocation(t3);
t3.printLocation();
t3.visited = true;
}
 
while (test.getLocation() != t1){
//Options for t2
if (test.getCommand().equals(t2.getExits().get(0).getDirection())) {
test.setLocation(t1);
t1.printLocation();
}
 
//Options for t3
if(test.getCommand().equals(t3.getExits().get(0).getDirName())) {
test.setLocation(t1);
t1.printLocation();
}
}
 
if ((t2.visited == true) && (t3.visited)) {
input.close();
}
}
 
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You say each room has a vector of exits.  I assume your data structures look like this (minimally) then?

class Character
{
   Room currentRoom;
}

//...

class Room
{
   Vector<Room> exits;
}

If so, you could write a method like so:

//in character class...
void takeExit(string cmd)
{
  for(Room room : currentRoom.exits)
  {
    if cmd.equalsIgnoreCase(room.name)
    {
      this.room = room;
      return;
    }
  }
  //didn't find a room.
  System.out.println("Sorry, I didn't understand.");
}

It's not ideal for a number of complicated reasons, but from a beginner standpoint it's more than enough.

 

Also, you should probably be using an ArrayList rather than a vector if possible.

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@SeraphLance: I tried placing that method in the Character class. It doesn't seem to recognize any of my commands. 

 

I created a Character called test.

I made a scanner called com and called the method in main like this:

 

test.takeExit(com.nextLine());

 

Am I doing something wrong?

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OH, I see. I forgot to mention that I had an exit class. Each room has a  map of exits

 

Map<String, Room> map = new HashMap<String, Room>();

 

I took this idea from SeanMiddleditch.

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It's probably worthwhile to learn to use a debugger for things like this, especially where user input is involved.  Are you using an IDE like Eclipse?  It has a fantastic debugger available that you can read about elsewhere, and virtually all IDEs have debuggers of some kind.

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I still think you are going about it the wrong way.

 

I believe you should parse the input immediately after receiving it into individual works.  then, you should pass that command to a generic command processor that handles all the normal commands:

n, s, e, w (directions), l (look), i (inventory), h (help), and q (quit).

If the generic processing fails, then call the rooms processing function to check for room specific commands:

 

(I don't know java syntax well, but hopefully it make sense)

// assume we have a Player class which keeps stats, inventory, etc
Player player("Mark");
 
// we'll start in the storage room
Room currentRoom = Rooms["storageRoom"];
currentRoom.PrintDescription();
 
while (game_is_running) {
  string commandLine = ReadInput();
 
  // if generic processing doesn't handle the command, do room specific
  if (!GenericProcessing(currentRoom, player, commandLine)) {
    // if the room specific processing fails, then it's invalid command
    if (!currentRoom.Processing(currentRoom, player, commandLine)) {
      print("Invalid command " + commandLine);
    }
  }
}
 
// assumes currentRoom is an in/out variable (passed by reference)
boolean GenericProcessing(Room currentRoom, Player player, string commandLine)
{
  // if this is a direction and an exit exists...
  if (currentRoom.IsExit(commandLine) {
    // change to that room
    currentRoom = currentRoom.Exit(commandLine);
    currentRoom.PrintDescription();
    return true;
  }
  // check for look
  if (commandLine == "l" || commandLine == "look") {
    currentRoom.PrintDescription();
    return true;
  }
 
  // do the same for i, h, q, any other generic command
 
 
  return false;
}
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