Oolite Bulletins

Arexack_Heretic wrote:

so I have been browsing on some JavaScript tutorials.

I can set

Code: Select all

var Xmark1Shiptype=new Array()
Xmark1Shiptype[0]="Adder"
Xmark1Shiptype[1]="Asp MkII"
Xmark1Shiptype[2]="Anaconda"
etc

then use this array to call the strings at will?

var Xmark1Shiptype = ["Adder", "Asp MkII", "Anaconda"]

for instance
shipdata:

Code: Select all

{
 "Xmark1Shipdata" =
 {
  like_ship = "Xmark1Shiptype[0]";
  bounty = "missionVariable.Xmark1_bounty_number";
  pilot = "missionVariable.Xmark1_pilot_name";
  roles = "Xmark1";
  etc.
 }

XMark1Shipdata =
{
    like_ship: Xmark1Shiptype[0],
    bounty: missionVariable.Xmark1_bounty_number
    // etc.
}

Howe does oolite acces arrays?

and can I read existing plist-arrays into a variable?

<key>script_info</key>
<dict>
    <key>AH_testArray</key>
    <array>
        <string>test1</string>
        <string>test2</string>
    </array>
</dict>

this.ship.scriptInfo.AH_testArray[0] // == "test1"

something like:
var Xmark1Shiptype=array(some_uncomplicated_array)

i'll try to construct a simple variable ship test-oxp now...
--edit: a problem I run into is that most entity properties are read-only, I'll have to check the dev-notes, to be sure the wiki is uptodate.

Arexack_Heretic wrote:

What I am trying to do:

1) save a set of random numbers to mission_variables.
2) use these numbers to display predictable message missionscript.
(create JS-arrays from descriptions.plistkeys, use array[#] to select 'name', 'ship', 'bounty', etc strings)

5) alter this ship according to additional demands (ship.bounty=mV.mark#_bounty, ship.name=mV.mark#_name, max_speed, max_energy,etc)

Ahruman wrote:

This is the wrong approach. Instead, generate random strings, then store the strings.

5) alter this ship according to additional demands (ship.bounty=mV.mark#_bounty, ship.name=mV.mark#_name, max_speed, max_energy,etc)

I don’t see why you’d need to do this. Why wouldn’t the marks be using normal ships with the normal stats?

On the other hand, in 1.70 you can change a ship’s primary role… although there’s no particular reason why you’d need to use numbered roles at all.

Arexack_Heretic wrote:

I don't see how i can turn a random string into a number. the random number may be needed to set defferent parameters. such as bounty and shiptype may be linked. OK so I can use a descriptions array containing available shiptypes to call a ship.

Why change the ship? because I want to. just adding a random ship doesn't cut it.
I want it to have a specified pilot (can set bounty here) and a specified shiptype.
changing the name would be required otherwise you can't find the mark.

Missile locked on to Cobra Mk III (guild target)

Cobra Mk III
guild target
6.394 km (Clean)

I think I need numbered role, because I only want a single instance of a mark(at most) to be present in the system.

this.findMarkWithID(targetID)
{
    function filterPredicate(entity)
    {
        return entity.isShip && entity.ah_markID != undefined && entity.markID = targetID
    }
    let matches = system.filteredEntities(this, filterPredicate)
    if (matches.length == 0)  return null
    else  return matches[0]
}

Alternatively, you could use an array in the mission script to track marks, and use the isValid property to check if they still exist. This behaves slightly differently, as it considers a ship to still exist if it’s “suspended” in a wormhole

var variable2 = outside
this.funcA = function()
 {
   var var1=2;
   if (var1!=1) {this.funcB;};
  }
this.funcB = function()
 {
   if (var1<=1) {stuff}
   else {var1--;};
  }

Arexack_Heretic wrote:

Small question on variables again:
when I exit a function, all variables defined inside this function are deleted.
when I call a function or method inside a function, do the variables of the first function carry over to the second one?
eg.

Code: Select all

var variable2 = outside
this.funcA = function()
 {
   var var1=2;
   if (var1!=1) {this.funcB;};
  }
this.funcB = function()
 {
   if (var1<=1) {stuff}
   else {var1--;};
  }

is funcA exited when calling funcB and the variable lost?

Arexack_Heretic wrote:

if so would putting the "var variable" outside the function keepit existing for as long as the script is being run?
or does this need to be "this.variable = value", as a property of the script?
...I think I'm confusing functions with methods now.
:roll:

var variable2 = outside
this.funcA = function()
{
    var var1 = 2
    if (var1 != 1) { var1 = this.funcB(var1) }
}


this.funcB = function(var1)
{
    if (var1 <= 1) { stuff }
    else { var1-- }
    return var1
}

this.funcA = function()
{
    var var1 = 2
    function funcB()
    {
        if (var1 <= 1) { stuff }
        else { var1-- }
    }
    if (var1 != 1) { this.funcB() }
}


// This is where it starts to get weird:
this.outer = function(x)
{
    var y = x + 2
    function closure(n)
    {
        return y + n
    }
    return closure // Returns the function itself; does not call the function.
}

this.sevenPlus = this.outer(5)    // this.sevenPlus is a now function which returns 7 + its argument
Log("Ten: " + sevenPlus(3))       // logs "Ten: 10"
Log("Twelve: " + sevenPlus(5))    // logs "Twelve: 12"