Home » Archimedes archive » Acorn User » AU 1998-08.adf » Freeware » PD/IntFiction/DavidRPG2/!DavidRPG2/Docs/Tutorial
PD/IntFiction/DavidRPG2/!DavidRPG2/Docs/Tutorial
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Acorn User » AU 1998-08.adf » Freeware |
| Filename: | PD/IntFiction/DavidRPG2/!DavidRPG2/Docs/Tutorial |
| Read OK: | ✔ |
| File size: | 2496 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
Tutorial
========
This tutorial will teach you the basics of writting adventures for DavidRPG2.
All the example files are stored in this directory: Double-Click them to try
them out.
This file only tells you the basics, but if you look through other example
files and also look at the Tech.CompDef file which contains the commands
which can be used in DavidRPG2, after you have mastered these examples the
rest should come easily.
To make your own files there are two ways:
1) Create a text file with your program in then Change its type to 'Advnture'
(Note: no e) by highlighting it in its directory and doing Menu->File 'x'
->Settype and tpye in 'Advnture'.
2) Create a file of type 'Advnture' this can be done in edit by pressing menu
over the !Edit Icon (Form the resources directory) going to 'Create' and
at the bottom of this sub-menu typing 'Advnture'. You then have a file of
the right type which you can save then run.
These methods only work if DavidRPG2 has been seen by the filer.
To Run them Double-Click on the file, to Edit them Shift-Double-Click on it.
Exercise1 - The Basic File
--------------------------
This is the basic file and contains all the parts which must be presanbt in
all adventures.
The lines starting with "|" are comments and are ignored by DavidRPG2.
The file has three parts:
1) A Decription:
...
name = Exercise 1
adventure = tutorial file
author = David Spence 1998
version = 0
...
This part of the file is the descripter, each of the four lines must be
presant. The text after the = is displayed in the Info box on the main
window's menu.
2) A start room
...
room one start {
name: "Test Room"
text: "Our first room."
}
...
This is the first room, it also where the game will start, hence the "start"
in the first line. All files must contain at least one room and one of the
rooms must be the start room.
The first line tells DavidRPG2 that we are telling it about a room, that the
label of the room is "one" and that it is the start room. This line will
be the same for every room except the label has to be different for every
room and there can only be one start room.
The next line is the name of the room. The name of the room is the text
between the quotes.
The next line is the decription of the room. The decription of the room is
the text between the quotes.
The last line signifies the end of the room.
3) The player information
...
player {
name: "Player"
text: "This is where the title screen goes."
}
...
This is where the player data goes, it is similar in content to the above
room block.
Please run the file 'Exercise1' in this directory. To open it Shift-Double-
Click it.
Exercise 2 - Two rooms
----------------------
For this file we add another room:
...
room two {
name: "Test Room 1"
text: "Our second room."
"The decription can be on more than"
"one line!"
south: goto(one)
}
...
Notice how the room description is over three lines, you can have as many
lines as you want to describe a room. Also there is a line starting with
'south:', this tells DavidRPG2 what to do to go north, after this can be
what is called code. In this example is is just one line telling it to goto
the room with the label 'one', ie the first room. But the code can be much
more complex: see the 'Example1' file and the Tech.CompDef file.
We have also added a corrisponding 'north:' line to our first room:
...
room one start {
name: "Test Room 1"
text: "Our first room."
north: goto(two)
}
...
Example 3 - Objects
-------------------
Now we can add objects. This is the bare bones of an object block:
...
object bat {
name: "bat"
text: "It is a long baseball bat."
move: yes
}
...
Notice that it is quite similar to the room. The only new thing is the
'move:' line. This simply dictates whether you can pick up the object it
is always followed by 'yes' or 'no'.
So we can see the object we must edit the first room and add the line
...
objects: bat
...
This is a comma seperated list of the objects in the room, an object can only
be in one place at a time though.
Example 4 - People
------------------
Again people are quite similar to rooms and objects:
...
person man {
name: "man"
text: "A tall man."
}
...
Notice how similar this is to the objects and rooms. The man has to go
somewhere, lets put him in the second room by adding the line:
...
people: man
...
Example 5 - Talking
-------------------
So far we have not been able to interact with the game much so lets look at
talking:
We can indroduce a talk block into the person block:
...
talk: {
"hello": print("The man says: Hello\n")
}
...
This looks strange but it is quite straight-forward. The "talk: {" and "}"
show the start and end of the block, they must be on their own lines. The
middle line has two parts seperated by a colon. The first is a list of
keywords seperated by spaces in quotes and the second part is the code which
is executed if any of the keywords appear in a "SAY xxx" command by the user.
We have come across code before to move between rooms and it can be used for
many different things, here it is used to print a line of text. The "\n"
at the end of the text signifies that we want a new line after our text.
Now every time you go in the second room and type 'say hello' you will get a
reply from the man.
Example 6 - Actions
-------------------
Actions allow you to interact at a deeper level with the game. There are
many permutations.
canbe: - these specify a actions which can be done by an object or the
player. It has similar structure to a talk block.
cando: - these specify a actions which can be done do an object, the playe
or a person. It has similar structure to a talk block.
actions: - these specify the actions which room let you do. It is similar
to the talk block.
Different ways of specifying these blocks and how the user types it in
dictate what code is called. There are 3 types of input:
1) <Verb>
This is when just a verb is typed in, for example 'jump' it results in the
action: code for the current room for this verb to be called and the cando:
block for the player for this verb to be called. Both will be called if
presant and if neither is presant the user is told he has made an invalid
input. This is the code added to the first room:
...
actions: {
"jump": print("There is a large thud.\n")
}
...
2) <Verb> <Object|person>
This is when an object has an action done to it. For this type to work you
must have an object which has <verb> in its cando list or the player must have <verb> in its cando list. There must also be <Object|Person> in the room.
Code called: a)Current room's action: if it has <verb>
b)Object of player's cando: if it has <verb>
c)Player's cando: if it has <verb>
d)<Object|person>'s canbe: if it has <verb>
3) Use <object> to <verb> <Object|person>
or <Verb> <Object|person> with\using <Object>
This is similar to 2) except that you have to have <object> and its cando:
code is called, if it has <verb>, instead of a, b and c.
2 and 3)
It is important t note that is the object or person is specified in the user
command then it does not matter if the cando:/canbe: blocks have the verb the
actions the command is still executed.
To test 2 and this I will add the following code to the bat:
...
cando: {
"hit": print("You swing the bat.\n")
}
...
And this to the man:
...
canbe: {
"hit": print("The man topples over.")
}
...
Try hitting the man with and without the bat.
Example1 - Misc
---------------
Most of the rest of the language can be gained from the Language file in this
directory, so please read it. Also the Example1 file contains a slightly
larger example which you may want to look at. Here is a summary of the rest
of the language:
a) energy:/dead:
energy: is followed by a value which is the energy of the object, person or
player. If the energy ever passes through or to zero from a positive value
the dead: code is called. The energy can be changed in code, see later.
It is use in Example1 for the box (hit the box twice with the bat.)
b) variables
Variables are used to store whole numbers they are defined in the file with a
start value, see the Example1 file. They can be changed and tested by code.
A Definition looks like this:
variable x = 9
c) code
There has been a lot of talk of code, as well as the single instructions
used in the above examples there are also multi-line code blocks which start
with a { then a return and end with a } on its own line. In between can be
the following commands:
print(string/variable) - output
goto(label) - goto room
P_move(<person>,<room>) - Moves a person to a room.
O_move(<object>,<room>) - Moves a object to a room
end() - Ends the game
change(<variable>,<int>) - changes <variable>/energy by <int>
set(<variable>,<int>) - set <variable>/energy to <int>
if(<variable>,<condition>) - see language
There is a more detaled description in the language file.
d) see:/unsee:
This specifies code which will be called when a person sees you or unsees
you.
e) leave:/enter:
Code in a room to be called when you enter or leave.
f) Room null
There is a room called 'null' which objects canbe sent to to make them
disapear. 00000000 54 75 74 6f 72 69 61 6c 0a 3d 3d 3d 3d 3d 3d 3d |Tutorial.=======|
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00000040 69 74 74 69 6e 67 20 61 64 76 65 6e 74 75 72 65 |itting adventure|
00000050 73 20 66 6f 72 20 44 61 76 69 64 52 50 47 32 2e |s for DavidRPG2.|
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00000070 20 66 69 6c 65 73 20 61 72 65 20 73 74 6f 72 65 | files are store|
00000080 64 20 69 6e 20 74 68 69 73 20 64 69 72 65 63 74 |d in this direct|
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00000540 20 41 20 44 65 63 72 69 70 74 69 6f 6e 3a 0a 0a | A Decription:..|
00000550 2e 2e 2e 0a 6e 61 6d 65 20 3d 20 45 78 65 72 63 |....name = Exerc|
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00000580 61 75 74 68 6f 72 20 3d 20 44 61 76 69 64 20 53 |author = David S|
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00000650 41 20 73 74 61 72 74 20 72 6f 6f 6d 0a 0a 2e 2e |A start room....|
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00000960 54 68 65 20 70 6c 61 79 65 72 20 69 6e 66 6f 72 |The player infor|
00000970 6d 61 74 69 6f 6e 0a 0a 2e 2e 2e 0a 70 6c 61 79 |mation......play|
00000980 65 72 20 7b 0a 6e 61 6d 65 3a 20 22 50 6c 61 79 |er {.name: "Play|
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00000a10 65 0a 72 6f 6f 6d 20 62 6c 6f 63 6b 2e 0a 0a 0a |e.room block....|
00000a20 50 6c 65 61 73 65 20 72 75 6e 20 74 68 65 20 66 |Please run the f|
00000a30 69 6c 65 20 27 45 78 65 72 63 69 73 65 31 27 20 |ile 'Exercise1' |
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00000a50 79 2e 20 54 6f 20 6f 70 65 6e 20 69 74 20 53 68 |y. To open it Sh|
00000a60 69 66 74 2d 44 6f 75 62 6c 65 2d 0a 43 6c 69 63 |ift-Double-.Clic|
00000a70 6b 20 69 74 2e 0a 0a 45 78 65 72 63 69 73 65 20 |k it...Exercise |
00000a80 32 20 2d 20 54 77 6f 20 72 6f 6f 6d 73 0a 2d 2d |2 - Two rooms.--|
00000a90 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
00000aa0 2d 2d 2d 2d 0a 0a 46 6f 72 20 74 68 69 73 20 66 |----..For this f|
00000ab0 69 6c 65 20 77 65 20 61 64 64 20 61 6e 6f 74 68 |ile we add anoth|
00000ac0 65 72 20 72 6f 6f 6d 3a 0a 0a 2e 2e 2e 0a 72 6f |er room:......ro|
00000ad0 6f 6d 20 74 77 6f 20 7b 0a 6e 61 6d 65 3a 20 22 |om two {.name: "|
00000ae0 54 65 73 74 20 52 6f 6f 6d 20 31 22 0a 74 65 78 |Test Room 1".tex|
00000af0 74 3a 20 22 4f 75 72 20 73 65 63 6f 6e 64 20 72 |t: "Our second r|
00000b00 6f 6f 6d 2e 22 0a 20 20 20 20 20 20 22 54 68 65 |oom.". "The|
00000b10 20 64 65 63 72 69 70 74 69 6f 6e 20 63 61 6e 20 | decription can |
00000b20 62 65 20 6f 6e 20 6d 6f 72 65 20 74 68 61 6e 22 |be on more than"|
00000b30 0a 20 20 20 20 20 20 22 6f 6e 65 20 6c 69 6e 65 |. "one line|
00000b40 21 22 0a 73 6f 75 74 68 3a 20 67 6f 74 6f 28 6f |!".south: goto(o|
00000b50 6e 65 29 0a 7d 0a 2e 2e 2e 0a 0a 4e 6f 74 69 63 |ne).}......Notic|
00000b60 65 20 68 6f 77 20 74 68 65 20 72 6f 6f 6d 20 64 |e how the room d|
00000b70 65 73 63 72 69 70 74 69 6f 6e 20 69 73 20 6f 76 |escription is ov|
00000b80 65 72 20 74 68 72 65 65 20 6c 69 6e 65 73 2c 20 |er three lines, |
00000b90 79 6f 75 20 63 61 6e 20 68 61 76 65 20 61 73 20 |you can have as |
00000ba0 6d 61 6e 79 0a 6c 69 6e 65 73 20 61 73 20 79 6f |many.lines as yo|
00000bb0 75 20 77 61 6e 74 20 74 6f 20 64 65 73 63 72 69 |u want to descri|
00000bc0 62 65 20 61 20 72 6f 6f 6d 2e 20 41 6c 73 6f 20 |be a room. Also |
00000bd0 74 68 65 72 65 20 69 73 20 61 20 6c 69 6e 65 20 |there is a line |
00000be0 73 74 61 72 74 69 6e 67 20 77 69 74 68 0a 27 73 |starting with.'s|
00000bf0 6f 75 74 68 3a 27 2c 20 74 68 69 73 20 74 65 6c |outh:', this tel|
00000c00 6c 73 20 44 61 76 69 64 52 50 47 32 20 77 68 61 |ls DavidRPG2 wha|
00000c10 74 20 74 6f 20 64 6f 20 74 6f 20 67 6f 20 6e 6f |t to do to go no|
00000c20 72 74 68 2c 20 61 66 74 65 72 20 74 68 69 73 20 |rth, after this |
00000c30 63 61 6e 20 62 65 0a 77 68 61 74 20 69 73 20 63 |can be.what is c|
00000c40 61 6c 6c 65 64 20 63 6f 64 65 2e 20 20 49 6e 20 |alled code. In |
00000c50 74 68 69 73 20 65 78 61 6d 70 6c 65 20 69 73 20 |this example is |
00000c60 69 73 20 6a 75 73 74 20 6f 6e 65 20 6c 69 6e 65 |is just one line|
00000c70 20 74 65 6c 6c 69 6e 67 20 69 74 20 74 6f 20 67 | telling it to g|
00000c80 6f 74 6f 0a 74 68 65 20 72 6f 6f 6d 20 77 69 74 |oto.the room wit|
00000c90 68 20 74 68 65 20 6c 61 62 65 6c 20 27 6f 6e 65 |h the label 'one|
00000ca0 27 2c 20 69 65 20 74 68 65 20 66 69 72 73 74 20 |', ie the first |
00000cb0 72 6f 6f 6d 2e 20 20 42 75 74 20 74 68 65 20 63 |room. But the c|
00000cc0 6f 64 65 20 63 61 6e 20 62 65 20 6d 75 63 68 0a |ode can be much.|
00000cd0 6d 6f 72 65 20 63 6f 6d 70 6c 65 78 3a 20 73 65 |more complex: se|
00000ce0 65 20 74 68 65 20 27 45 78 61 6d 70 6c 65 31 27 |e the 'Example1'|
00000cf0 20 66 69 6c 65 20 61 6e 64 20 74 68 65 20 54 65 | file and the Te|
00000d00 63 68 2e 43 6f 6d 70 44 65 66 20 66 69 6c 65 2e |ch.CompDef file.|
00000d10 0a 0a 57 65 20 68 61 76 65 20 61 6c 73 6f 20 61 |..We have also a|
00000d20 64 64 65 64 20 61 20 63 6f 72 72 69 73 70 6f 6e |dded a corrispon|
00000d30 64 69 6e 67 20 27 6e 6f 72 74 68 3a 27 20 6c 69 |ding 'north:' li|
00000d40 6e 65 20 74 6f 20 6f 75 72 20 66 69 72 73 74 20 |ne to our first |
00000d50 72 6f 6f 6d 3a 0a 0a 2e 2e 2e 0a 72 6f 6f 6d 20 |room:......room |
00000d60 6f 6e 65 20 73 74 61 72 74 20 7b 0a 6e 61 6d 65 |one start {.name|
00000d70 3a 20 22 54 65 73 74 20 52 6f 6f 6d 20 31 22 0a |: "Test Room 1".|
00000d80 74 65 78 74 3a 20 22 4f 75 72 20 66 69 72 73 74 |text: "Our first|
00000d90 20 72 6f 6f 6d 2e 22 0a 6e 6f 72 74 68 3a 20 67 | room.".north: g|
00000da0 6f 74 6f 28 74 77 6f 29 0a 7d 20 20 20 20 20 20 |oto(two).} |
00000db0 20 20 20 20 20 20 20 20 20 20 20 20 20 0a 2e 2e | ...|
00000dc0 2e 20 0a 0a 45 78 61 6d 70 6c 65 20 33 20 2d 20 |. ..Example 3 - |
00000dd0 4f 62 6a 65 63 74 73 0a 2d 2d 2d 2d 2d 2d 2d 2d |Objects.--------|
00000de0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 4e 6f 77 20 |-----------.Now |
00000df0 77 65 20 63 61 6e 20 61 64 64 20 6f 62 6a 65 63 |we can add objec|
00000e00 74 73 2e 20 20 54 68 69 73 20 69 73 20 74 68 65 |ts. This is the|
00000e10 20 62 61 72 65 20 62 6f 6e 65 73 20 6f 66 20 61 | bare bones of a|
00000e20 6e 20 6f 62 6a 65 63 74 20 62 6c 6f 63 6b 3a 0a |n object block:.|
00000e30 0a 2e 2e 2e 0a 6f 62 6a 65 63 74 20 62 61 74 20 |.....object bat |
00000e40 7b 0a 6e 61 6d 65 3a 20 22 62 61 74 22 0a 74 65 |{.name: "bat".te|
00000e50 78 74 3a 20 22 49 74 20 69 73 20 61 20 6c 6f 6e |xt: "It is a lon|
00000e60 67 20 62 61 73 65 62 61 6c 6c 20 62 61 74 2e 22 |g baseball bat."|
00000e70 0a 6d 6f 76 65 3a 20 79 65 73 0a 7d 0a 2e 2e 2e |.move: yes.}....|
00000e80 0a 0a 4e 6f 74 69 63 65 20 74 68 61 74 20 69 74 |..Notice that it|
00000e90 20 69 73 20 71 75 69 74 65 20 73 69 6d 69 6c 61 | is quite simila|
00000ea0 72 20 74 6f 20 74 68 65 20 72 6f 6f 6d 2e 20 54 |r to the room. T|
00000eb0 68 65 20 6f 6e 6c 79 20 6e 65 77 20 74 68 69 6e |he only new thin|
00000ec0 67 20 69 73 20 74 68 65 0a 27 6d 6f 76 65 3a 27 |g is the.'move:'|
00000ed0 20 6c 69 6e 65 2e 20 20 54 68 69 73 20 73 69 6d | line. This sim|
00000ee0 70 6c 79 20 64 69 63 74 61 74 65 73 20 77 68 65 |ply dictates whe|
00000ef0 74 68 65 72 20 79 6f 75 20 63 61 6e 20 70 69 63 |ther you can pic|
00000f00 6b 20 75 70 20 74 68 65 20 6f 62 6a 65 63 74 20 |k up the object |
00000f10 69 74 0a 69 73 20 61 6c 77 61 79 73 20 66 6f 6c |it.is always fol|
00000f20 6c 6f 77 65 64 20 62 79 20 27 79 65 73 27 20 6f |lowed by 'yes' o|
00000f30 72 20 27 6e 6f 27 2e 0a 0a 53 6f 20 77 65 20 63 |r 'no'...So we c|
00000f40 61 6e 20 73 65 65 20 74 68 65 20 6f 62 6a 65 63 |an see the objec|
00000f50 74 20 77 65 20 6d 75 73 74 20 65 64 69 74 20 74 |t we must edit t|
00000f60 68 65 20 66 69 72 73 74 20 72 6f 6f 6d 20 61 6e |he first room an|
00000f70 64 20 61 64 64 20 74 68 65 20 6c 69 6e 65 0a 0a |d add the line..|
00000f80 2e 2e 2e 0a 6f 62 6a 65 63 74 73 3a 20 62 61 74 |....objects: bat|
00000f90 0a 2e 2e 2e 0a 0a 54 68 69 73 20 69 73 20 61 20 |......This is a |
00000fa0 63 6f 6d 6d 61 20 73 65 70 65 72 61 74 65 64 20 |comma seperated |
00000fb0 6c 69 73 74 20 6f 66 20 74 68 65 20 6f 62 6a 65 |list of the obje|
00000fc0 63 74 73 20 69 6e 20 74 68 65 20 72 6f 6f 6d 2c |cts in the room,|
00000fd0 20 61 6e 20 6f 62 6a 65 63 74 20 63 61 6e 20 6f | an object can o|
00000fe0 6e 6c 79 0a 62 65 20 69 6e 20 6f 6e 65 20 70 6c |nly.be in one pl|
00000ff0 61 63 65 20 61 74 20 61 20 74 69 6d 65 20 74 68 |ace at a time th|
00001000 6f 75 67 68 2e 0a 0a 45 78 61 6d 70 6c 65 20 34 |ough...Example 4|
00001010 20 2d 20 50 65 6f 70 6c 65 0a 2d 2d 2d 2d 2d 2d | - People.------|
00001020 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 41 67 61 |------------.Aga|
00001030 69 6e 20 70 65 6f 70 6c 65 20 61 72 65 20 71 75 |in people are qu|
00001040 69 74 65 20 73 69 6d 69 6c 61 72 20 74 6f 20 72 |ite similar to r|
00001050 6f 6f 6d 73 20 61 6e 64 20 6f 62 6a 65 63 74 73 |ooms and objects|
00001060 3a 0a 0a 2e 2e 2e 0a 70 65 72 73 6f 6e 20 6d 61 |:......person ma|
00001070 6e 20 7b 0a 6e 61 6d 65 3a 20 22 6d 61 6e 22 0a |n {.name: "man".|
00001080 74 65 78 74 3a 20 22 41 20 74 61 6c 6c 20 6d 61 |text: "A tall ma|
00001090 6e 2e 22 0a 7d 0a 2e 2e 2e 0a 0a 4e 6f 74 69 63 |n.".}......Notic|
000010a0 65 20 68 6f 77 20 73 69 6d 69 6c 61 72 20 74 68 |e how similar th|
000010b0 69 73 20 69 73 20 74 6f 20 74 68 65 20 6f 62 6a |is is to the obj|
000010c0 65 63 74 73 20 61 6e 64 20 72 6f 6f 6d 73 2e 20 |ects and rooms. |
000010d0 20 54 68 65 20 6d 61 6e 20 68 61 73 20 74 6f 20 | The man has to |
000010e0 67 6f 0a 73 6f 6d 65 77 68 65 72 65 2c 20 6c 65 |go.somewhere, le|
000010f0 74 73 20 70 75 74 20 68 69 6d 20 69 6e 20 74 68 |ts put him in th|
00001100 65 20 73 65 63 6f 6e 64 20 72 6f 6f 6d 20 62 79 |e second room by|
00001110 20 61 64 64 69 6e 67 20 74 68 65 20 6c 69 6e 65 | adding the line|
00001120 3a 0a 0a 2e 2e 2e 0a 70 65 6f 70 6c 65 3a 20 6d |:......people: m|
00001130 61 6e 0a 2e 2e 2e 0a 0a 45 78 61 6d 70 6c 65 20 |an......Example |
00001140 35 20 2d 20 54 61 6c 6b 69 6e 67 0a 2d 2d 2d 2d |5 - Talking.----|
00001150 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a |---------------.|
00001160 53 6f 20 66 61 72 20 77 65 20 68 61 76 65 20 6e |So far we have n|
00001170 6f 74 20 62 65 65 6e 20 61 62 6c 65 20 74 6f 20 |ot been able to |
00001180 69 6e 74 65 72 61 63 74 20 77 69 74 68 20 74 68 |interact with th|
00001190 65 20 67 61 6d 65 20 6d 75 63 68 20 73 6f 20 6c |e game much so l|
000011a0 65 74 73 20 6c 6f 6f 6b 20 61 74 0a 74 61 6c 6b |ets look at.talk|
000011b0 69 6e 67 3a 0a 0a 57 65 20 63 61 6e 20 69 6e 64 |ing:..We can ind|
000011c0 72 6f 64 75 63 65 20 61 20 74 61 6c 6b 20 62 6c |roduce a talk bl|
000011d0 6f 63 6b 20 69 6e 74 6f 20 74 68 65 20 70 65 72 |ock into the per|
000011e0 73 6f 6e 20 62 6c 6f 63 6b 3a 0a 0a 2e 2e 2e 0a |son block:......|
000011f0 74 61 6c 6b 3a 20 7b 0a 22 68 65 6c 6c 6f 22 3a |talk: {."hello":|
00001200 20 70 72 69 6e 74 28 22 54 68 65 20 6d 61 6e 20 | print("The man |
00001210 73 61 79 73 3a 20 48 65 6c 6c 6f 5c 6e 22 29 0a |says: Hello\n").|
00001220 7d 0a 2e 2e 2e 0a 0a 54 68 69 73 20 6c 6f 6f 6b |}......This look|
00001230 73 20 73 74 72 61 6e 67 65 20 62 75 74 20 69 74 |s strange but it|
00001240 20 69 73 20 71 75 69 74 65 20 73 74 72 61 69 67 | is quite straig|
00001250 68 74 2d 66 6f 72 77 61 72 64 2e 20 54 68 65 20 |ht-forward. The |
00001260 22 74 61 6c 6b 3a 20 7b 22 20 61 6e 64 20 22 7d |"talk: {" and "}|
00001270 22 20 0a 73 68 6f 77 20 74 68 65 20 73 74 61 72 |" .show the star|
00001280 74 20 61 6e 64 20 65 6e 64 20 6f 66 20 74 68 65 |t and end of the|
00001290 20 62 6c 6f 63 6b 2c 20 74 68 65 79 20 6d 75 73 | block, they mus|
000012a0 74 20 62 65 20 6f 6e 20 74 68 65 69 72 20 6f 77 |t be on their ow|
000012b0 6e 20 6c 69 6e 65 73 2e 20 54 68 65 20 0a 6d 69 |n lines. The .mi|
000012c0 64 64 6c 65 20 6c 69 6e 65 20 68 61 73 20 74 77 |ddle line has tw|
000012d0 6f 20 70 61 72 74 73 20 73 65 70 65 72 61 74 65 |o parts seperate|
000012e0 64 20 62 79 20 61 20 63 6f 6c 6f 6e 2e 20 54 68 |d by a colon. Th|
000012f0 65 20 66 69 72 73 74 20 69 73 20 61 20 6c 69 73 |e first is a lis|
00001300 74 20 6f 66 20 0a 6b 65 79 77 6f 72 64 73 20 73 |t of .keywords s|
00001310 65 70 65 72 61 74 65 64 20 62 79 20 73 70 61 63 |eperated by spac|
00001320 65 73 20 69 6e 20 71 75 6f 74 65 73 20 61 6e 64 |es in quotes and|
00001330 20 74 68 65 20 73 65 63 6f 6e 64 20 70 61 72 74 | the second part|
00001340 20 69 73 20 74 68 65 20 63 6f 64 65 20 77 68 69 | is the code whi|
00001350 63 68 0a 69 73 20 65 78 65 63 75 74 65 64 20 69 |ch.is executed i|
00001360 66 20 61 6e 79 20 6f 66 20 74 68 65 20 6b 65 79 |f any of the key|
00001370 77 6f 72 64 73 20 61 70 70 65 61 72 20 69 6e 20 |words appear in |
00001380 61 20 22 53 41 59 20 78 78 78 22 20 63 6f 6d 6d |a "SAY xxx" comm|
00001390 61 6e 64 20 62 79 20 74 68 65 20 75 73 65 72 2e |and by the user.|
000013a0 0a 57 65 20 68 61 76 65 20 63 6f 6d 65 20 61 63 |.We have come ac|
000013b0 72 6f 73 73 20 63 6f 64 65 20 62 65 66 6f 72 65 |ross code before|
000013c0 20 74 6f 20 6d 6f 76 65 20 62 65 74 77 65 65 6e | to move between|
000013d0 20 72 6f 6f 6d 73 20 61 6e 64 20 69 74 20 63 61 | rooms and it ca|
000013e0 6e 20 62 65 20 75 73 65 64 20 66 6f 72 0a 6d 61 |n be used for.ma|
000013f0 6e 79 20 64 69 66 66 65 72 65 6e 74 20 74 68 69 |ny different thi|
00001400 6e 67 73 2c 20 68 65 72 65 20 69 74 20 69 73 20 |ngs, here it is |
00001410 75 73 65 64 20 74 6f 20 70 72 69 6e 74 20 61 20 |used to print a |
00001420 6c 69 6e 65 20 6f 66 20 74 65 78 74 2e 20 20 54 |line of text. T|
00001430 68 65 20 22 5c 6e 22 0a 61 74 20 74 68 65 20 65 |he "\n".at the e|
00001440 6e 64 20 6f 66 20 74 68 65 20 74 65 78 74 20 73 |nd of the text s|
00001450 69 67 6e 69 66 69 65 73 20 74 68 61 74 20 77 65 |ignifies that we|
00001460 20 77 61 6e 74 20 61 20 6e 65 77 20 6c 69 6e 65 | want a new line|
00001470 20 61 66 74 65 72 20 6f 75 72 20 74 65 78 74 2e | after our text.|
00001480 0a 0a 4e 6f 77 20 65 76 65 72 79 20 74 69 6d 65 |..Now every time|
00001490 20 79 6f 75 20 67 6f 20 69 6e 20 74 68 65 20 73 | you go in the s|
000014a0 65 63 6f 6e 64 20 72 6f 6f 6d 20 61 6e 64 20 74 |econd room and t|
000014b0 79 70 65 20 27 73 61 79 20 68 65 6c 6c 6f 27 20 |ype 'say hello' |
000014c0 79 6f 75 20 77 69 6c 6c 20 67 65 74 20 61 0a 72 |you will get a.r|
000014d0 65 70 6c 79 20 66 72 6f 6d 20 74 68 65 20 6d 61 |eply from the ma|
000014e0 6e 2e 0a 0a 45 78 61 6d 70 6c 65 20 36 20 2d 20 |n...Example 6 - |
000014f0 41 63 74 69 6f 6e 73 0a 2d 2d 2d 2d 2d 2d 2d 2d |Actions.--------|
00001500 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 41 63 74 69 |-----------.Acti|
00001510 6f 6e 73 20 61 6c 6c 6f 77 20 79 6f 75 20 74 6f |ons allow you to|
00001520 20 69 6e 74 65 72 61 63 74 20 61 74 20 61 20 64 | interact at a d|
00001530 65 65 70 65 72 20 6c 65 76 65 6c 20 77 69 74 68 |eeper level with|
00001540 20 74 68 65 20 67 61 6d 65 2e 20 54 68 65 72 65 | the game. There|
00001550 20 61 72 65 0a 6d 61 6e 79 20 70 65 72 6d 75 74 | are.many permut|
00001560 61 74 69 6f 6e 73 2e 0a 0a 63 61 6e 62 65 3a 20 |ations...canbe: |
00001570 20 20 2d 20 74 68 65 73 65 20 73 70 65 63 69 66 | - these specif|
00001580 79 20 61 20 61 63 74 69 6f 6e 73 20 77 68 69 63 |y a actions whic|
00001590 68 20 63 61 6e 20 62 65 20 64 6f 6e 65 20 62 79 |h can be done by|
000015a0 20 61 6e 20 6f 62 6a 65 63 74 20 6f 72 20 74 68 | an object or th|
000015b0 65 20 0a 20 20 20 20 20 20 20 20 20 20 20 70 6c |e . pl|
000015c0 61 79 65 72 2e 20 49 74 20 68 61 73 20 73 69 6d |ayer. It has sim|
000015d0 69 6c 61 72 20 73 74 72 75 63 74 75 72 65 20 74 |ilar structure t|
000015e0 6f 20 61 20 74 61 6c 6b 20 62 6c 6f 63 6b 2e 0a |o a talk block..|
000015f0 63 61 6e 64 6f 3a 20 20 20 2d 20 74 68 65 73 65 |cando: - these|
00001600 20 73 70 65 63 69 66 79 20 61 20 61 63 74 69 6f | specify a actio|
00001610 6e 73 20 77 68 69 63 68 20 63 61 6e 20 62 65 20 |ns which can be |
00001620 64 6f 6e 65 20 64 6f 20 61 6e 20 6f 62 6a 65 63 |done do an objec|
00001630 74 2c 20 74 68 65 20 70 6c 61 79 65 0a 20 20 20 |t, the playe. |
00001640 20 20 20 20 20 20 20 20 6f 72 20 61 20 70 65 72 | or a per|
00001650 73 6f 6e 2e 20 49 74 20 68 61 73 20 73 69 6d 69 |son. It has simi|
00001660 6c 61 72 20 73 74 72 75 63 74 75 72 65 20 74 6f |lar structure to|
00001670 20 61 20 74 61 6c 6b 20 62 6c 6f 63 6b 2e 0a 61 | a talk block..a|
00001680 63 74 69 6f 6e 73 3a 20 2d 20 74 68 65 73 65 20 |ctions: - these |
00001690 73 70 65 63 69 66 79 20 74 68 65 20 61 63 74 69 |specify the acti|
000016a0 6f 6e 73 20 77 68 69 63 68 20 72 6f 6f 6d 20 6c |ons which room l|
000016b0 65 74 20 79 6f 75 20 64 6f 2e 20 49 74 20 69 73 |et you do. It is|
000016c0 20 73 69 6d 69 6c 61 72 0a 20 20 20 20 20 20 20 | similar. |
000016d0 20 20 20 20 74 6f 20 74 68 65 20 74 61 6c 6b 20 | to the talk |
000016e0 62 6c 6f 63 6b 2e 0a 0a 44 69 66 66 65 72 65 6e |block...Differen|
000016f0 74 20 77 61 79 73 20 6f 66 20 73 70 65 63 69 66 |t ways of specif|
00001700 79 69 6e 67 20 74 68 65 73 65 20 62 6c 6f 63 6b |ying these block|
00001710 73 20 61 6e 64 20 68 6f 77 20 74 68 65 20 75 73 |s and how the us|
00001720 65 72 20 74 79 70 65 73 20 69 74 20 69 6e 0a 64 |er types it in.d|
00001730 69 63 74 61 74 65 20 77 68 61 74 20 63 6f 64 65 |ictate what code|
00001740 20 69 73 20 63 61 6c 6c 65 64 2e 20 20 54 68 65 | is called. The|
00001750 72 65 20 61 72 65 20 33 20 74 79 70 65 73 20 6f |re are 3 types o|
00001760 66 20 69 6e 70 75 74 3a 0a 0a 31 29 20 3c 56 65 |f input:..1) <Ve|
00001770 72 62 3e 0a 0a 54 68 69 73 20 69 73 20 77 68 65 |rb>..This is whe|
00001780 6e 20 6a 75 73 74 20 61 20 76 65 72 62 20 69 73 |n just a verb is|
00001790 20 74 79 70 65 64 20 69 6e 2c 20 66 6f 72 20 65 | typed in, for e|
000017a0 78 61 6d 70 6c 65 20 27 6a 75 6d 70 27 20 69 74 |xample 'jump' it|
000017b0 20 72 65 73 75 6c 74 73 20 69 6e 20 74 68 65 0a | results in the.|
000017c0 61 63 74 69 6f 6e 3a 20 63 6f 64 65 20 66 6f 72 |action: code for|
000017d0 20 74 68 65 20 63 75 72 72 65 6e 74 20 72 6f 6f | the current roo|
000017e0 6d 20 66 6f 72 20 74 68 69 73 20 76 65 72 62 20 |m for this verb |
000017f0 74 6f 20 62 65 20 63 61 6c 6c 65 64 20 61 6e 64 |to be called and|
00001800 20 74 68 65 20 63 61 6e 64 6f 3a 20 0a 62 6c 6f | the cando: .blo|
00001810 63 6b 20 66 6f 72 20 74 68 65 20 70 6c 61 79 65 |ck for the playe|
00001820 72 20 66 6f 72 20 74 68 69 73 20 76 65 72 62 20 |r for this verb |
00001830 74 6f 20 62 65 20 63 61 6c 6c 65 64 2e 20 42 6f |to be called. Bo|
00001840 74 68 20 77 69 6c 6c 20 62 65 20 63 61 6c 6c 65 |th will be calle|
00001850 64 20 69 66 20 0a 70 72 65 73 61 6e 74 20 61 6e |d if .presant an|
00001860 64 20 69 66 20 6e 65 69 74 68 65 72 20 69 73 20 |d if neither is |
00001870 70 72 65 73 61 6e 74 20 74 68 65 20 75 73 65 72 |presant the user|
00001880 20 69 73 20 74 6f 6c 64 20 68 65 20 68 61 73 20 | is told he has |
00001890 6d 61 64 65 20 61 6e 20 69 6e 76 61 6c 69 64 0a |made an invalid.|
000018a0 69 6e 70 75 74 2e 20 54 68 69 73 20 69 73 20 74 |input. This is t|
000018b0 68 65 20 63 6f 64 65 20 61 64 64 65 64 20 74 6f |he code added to|
000018c0 20 74 68 65 20 66 69 72 73 74 20 72 6f 6f 6d 3a | the first room:|
000018d0 0a 0a 2e 2e 2e 0a 61 63 74 69 6f 6e 73 3a 20 7b |......actions: {|
000018e0 0a 22 6a 75 6d 70 22 3a 20 70 72 69 6e 74 28 22 |."jump": print("|
000018f0 54 68 65 72 65 20 69 73 20 61 20 6c 61 72 67 65 |There is a large|
00001900 20 74 68 75 64 2e 5c 6e 22 29 0a 7d 0a 2e 2e 2e | thud.\n").}....|
00001910 0a 0a 32 29 20 3c 56 65 72 62 3e 20 3c 4f 62 6a |..2) <Verb> <Obj|
00001920 65 63 74 7c 70 65 72 73 6f 6e 3e 0a 0a 54 68 69 |ect|person>..Thi|
00001930 73 20 69 73 20 77 68 65 6e 20 61 6e 20 6f 62 6a |s is when an obj|
00001940 65 63 74 20 68 61 73 20 61 6e 20 61 63 74 69 6f |ect has an actio|
00001950 6e 20 64 6f 6e 65 20 74 6f 20 69 74 2e 20 46 6f |n done to it. Fo|
00001960 72 20 74 68 69 73 20 74 79 70 65 20 74 6f 20 77 |r this type to w|
00001970 6f 72 6b 20 79 6f 75 20 0a 6d 75 73 74 20 68 61 |ork you .must ha|
00001980 76 65 20 61 6e 20 6f 62 6a 65 63 74 20 77 68 69 |ve an object whi|
00001990 63 68 20 68 61 73 20 3c 76 65 72 62 3e 20 69 6e |ch has <verb> in|
000019a0 20 69 74 73 20 63 61 6e 64 6f 20 6c 69 73 74 20 | its cando list |
000019b0 6f 72 20 74 68 65 20 70 6c 61 79 65 72 20 6d 75 |or the player mu|
000019c0 73 74 20 68 61 76 65 20 3c 76 65 72 62 3e 20 69 |st have <verb> i|
000019d0 6e 20 69 74 73 20 63 61 6e 64 6f 20 6c 69 73 74 |n its cando list|
000019e0 2e 20 54 68 65 72 65 20 6d 75 73 74 20 61 6c 73 |. There must als|
000019f0 6f 20 62 65 20 3c 4f 62 6a 65 63 74 7c 50 65 72 |o be <Object|Per|
00001a00 73 6f 6e 3e 20 69 6e 20 74 68 65 20 72 6f 6f 6d |son> in the room|
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