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2 Scripting
SW Development CourseMultiplayer Multimedia Apps
on the Web

• Events
• Language elements
• Flow control constructs
• Implicit parameters
• Movement EVENTs
• Navigating documentation
• Array and SETs

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EVENT

• Whatever happens, an EVENTO triggers
• When an EVENT triggers, the system looks for a
  specific piece of software
• At each call, if that piece of software is found,
  it is executed

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EVENT example

• At the games startup
• onStart Event
• If code for onStart is found, it is executed

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EVENT

• EVENT id_evento
• Instruction
• Instruction ..
• End_EVENT

• ? verify Developers Ref.

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EVENT Example

• EVENT onStart
• Call PopMonster() My function make a
  monster to pop up in a random room
• End_EVENT

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EVENT example

• A character gets looked at (clicked on)
• The event person.onLook triggers
• If existing, the event gets executed and stop.
• Otherwise the generic event onLook triggers
• If existing, the event gets executed.

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Implicit parameters

• OWNER who owns the event equals to this in
  Java
• AGENT who started the action
• TARGET third actor (sometimes used, mostly not)

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EVENT Model person.onLook
AGENT
OWNER
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onLook EVENT Example

• SCRIPTS
• EVENT guy.onLook
• Speak OWNER,AGENT,So, whats up?"
• END_SCRIPTS

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Speak

• Speak speaker,destination, phrase , phrase
  
• speaker
• Defaults to OWNER
• destination
• Defaults to AGENT
• If there are many phrases, they are printed in
  cycle

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Speak from this

• SCRIPTS
• EVENT guy.onLook
• Speak OWNER,AGENT,So, whats up?
• END_SCRIPTS

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to this (compact form)

• SCRIPTS
• EVENT guy.onLook
• Speak So, whats up?
• END_SCRIPTS

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Pre-defined values

• SYS (System voice)
• Use as speaker when needed
• WORLD (All connected players)
• Use as destination

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onLook EVENT Example

• SCRIPTS
• EVENT guy.onLook
• Speak SYS,WORLD,Player AGENT looks
  OWNER
• END_SCRIPTS

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Object Model di CHARACTERS

• Use the dot . to refer to an objects property
• Person.name Name of the person
• Person.container Where person is (room object)
• Person.container.id (rooms ID)
• Person.container.name (rooms name)

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Print

• Print dest, What , what
• Print In this room theres some light
• Print OWNER OWNER AGENT AGENT
  TARGET TARGET

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Assignment remember a value

• Birthday July 26th
• Print Birthday
• July 26th

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If .. Else

• If (condition)
• Istructions
• Else
• Istructions
• End_If
• No THEN
• End_If and not End If

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RndInt(N)

• Returns a random nunmber from 1 a N

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If .. Else

• If RndInt(2) 1
• Print ODD!
• Else
• Print EVEN!
• End_If

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EVENT Model person.onHear
TARGET
AGENT
OWNER
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Printing implicit parameters

• Print OWNER OWNER AGENT AGENT
  TARGET TARGET

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Inspecting the log

• System folder
• File name is debug.log
• number of slot you used
• Note If it is missing then edit setting debugTo
  in the worldnav.properties file

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Echoing speech

• EVENT person.onHear
• Speak OWNER,AGENT,You said TARGET ,
  what do you mean?
• END_EVENT

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EVENT Model room.onLoose
AGENT
TARGET
OWNER
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EVENT Model person.onExit
OWNER
AGENT
TARGET
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EVENT Model person.onEnter
OWNER
AGENT
TARGET
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EVENT Model room.onReceive
AGENT (?)
TARGET
OWNER
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Navigating Developers Reference

• How DimensioneX works
• Configuration
• Design-time part (DXW)
• Run-Time part (SmallBasic)
• Objects Object Model
• System (built-in) Events
• Available Functions
• Available Istructions

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Array
arrGreets
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2
3
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ciao
hola
hi
hello
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Array RndInt(N)

• arrGreets NewSet(ciao,hola,hello)
• Speak arrGreets(RndInt(3))
• Ciao
• Hello
• Ciao
• Hola

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SET
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For Each Next

• For Each var In set
• Instructions
• Next
• Careful! To set and arrays

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For Each Next SET

• Print present characters
• For Each x In getCharactersIn(WORLD)
• Print x.name
• Next

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Summary

• Events
• Language elements
• Flow control constructs
• Implicit parameters
• Movement EVENTs
• Navigating documentation
• Array and SETs