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Is it possible for a datablock to inherit methods ?

by suddysud aka mrclean · in Torque Game Engine · 02/20/2006 (11:47 pm) · 7 replies

Is it possible for a datablock to inherit methods ?


Here is the datablock in the fps sample.
datablock PlayerData(DemoPlayer : PlayerBody)
{
   shootingDelay = 2000;
};
Here is an example of the method

function DemoPlayer::onReachDestination(%this,%obj)
{
 
   // Moves to the next node on the path.
   // Override for all player. Normally we'd override this for only
   // a specific player datablock or class of players.
   if (%obj.path !$= "") {
      if (%obj.currentNode == %obj.targetNode)
         %this.onEndOfPath(%obj,%obj.path);
      else
         %obj.moveToNextNode();
   }
}
Is it possible for me to do something like this ? 
datablock PlayerData(FatDemoPlayer : PlayerBody)
{
   maxForwardSpeed = 2;
   maxBackwardSpeed = 2;
};

Now if I just try to use this datablock it won't move around the path because it doesn't have onReachDestination. But rather than rewriting onReachDestination, I would like to inherit it?

Any ideas on that?

Thanks in advance

Stev
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Torque Owner Tim Heldna
#1
02/21/2006 (4:43 am)
I managed to achieve something similar with weapon images.

Theoretically something like this should work...
function PlayerData::onReachDestination(%this,%obj)

I'll have to look into it and get back to you

Torque Owner suddysud aka mrclean
#2
02/21/2006 (12:34 pm)
Please let me know.

I'd definitly like to know how a new datablock can inherit not only the properties but also the static methods

Associate Orion Elenzil
Real Life Plus
#3
02/21/2006 (12:48 pm)
I don't actually know the answer,
but i do see what seems to be a typo in your code -

i think you want this:
datablock PlayerData(FatDemoPlayer : DemoPlayer)

instead of this:
datablock PlayerData(FatDemoPlayer : PlayerBody)

Torque Owner suddysud aka mrclean
#4
02/21/2006 (1:55 pm)
No that wasn't a typo. In player.cs you have the original datablock PlayerBody

datablock PlayerData(PlayerBody){..}



Then in aiplayer.cs, DemoPlayer inherits from PlayerBody with the statement

datablock PlayerData(DemoPlayer : PlayerBody){..}



So my FatDemoPlayer inherits from DemoPlayer with the statement

datablock PlayerData(FatDemoPlayer : DemoPlayer){...}

I think FatDemoPlayer could have inherited from either DemoPlayer or PlayerBody.

-------------------

Once again, I'm just trying to figure out how to make new datablocks that inherit not only properties but also those methods/functions.

I notice something interesting in player.cs at the bottom there are these functions 

function Player::playDeathAnimation(%this)
{
   if (%this.deathIdx++ > 11)
      %this.deathIdx = 1;
   %this.setActionThread("Death" @ %this.deathIdx);
}

function Player::playCelAnimation(%this,%anim)
{
   if (%this.getState() !$= "Dead")
      %this.setActionThread("cel"@%anim);
}

I was wondering if these functions were related to the PlayerData block. and DemoBody might inherit them.
Does anyone know ?

Thanks in advance

Associate Orion Elenzil
Real Life Plus
#5
02/21/2006 (1:59 pm)
Quote:
So my FatDemoPlayer inherits from DemoPlayer with the statement

datablock PlayerData(FatDemoPlayer : DemoPlayer){...}

right, except that in your original post you have

Quote:
datablock PlayerData(FatDemoPlayer : PlayerBody){...}

.. or i'm hallucinating or something. it's possible.

Torque Owner Owen Ortmayer
#6
02/21/2006 (2:03 pm)
I think your problem may be that TGE (i use 1.3) only allows for 1 level of script inheritance. I think we used this resource to allow multiple levels of script inheritance: www.garagegames.com/index.php?sec=mg&mod=resource&page=view&qid=6335

Torque Owner suddysud aka mrclean
#7
02/21/2006 (2:26 pm)
Orion you are right. I Missed that.
But I'm glad you understand the question though.

Owen thanks for the reference.

I'm using TGE 1.4 and i don't think it has this multiple levels of script inheritance.

I notice on the player.cs file that comes with 1.4 there is a datablock called PlayerData(PlayerBody)
and at the bottom there are these functions like 



function Player::playDeathAnimation(%this)
{
   if (%this.deathIdx++ > 11)
      %this.deathIdx = 1;
   %this.setActionThread("Death" @ %this.deathIdx);
}

function Player::playCelAnimation(%this,%anim)
{
   if (%this.getState() !$= "Dead")
      %this.setActionThread("cel"@%anim);
}


//----------------------------------------------------------------------------

function Player::playDeathCry( %this )
{
   %this.playAudio(0,DeathCrySound);
}

function Player::playPain( %this )
{
   %this.playAudio(0,PainCrySound);
}


Are these functions part of the PlayerData Class in some way.
This looks like an example of the inheritance.
and the Naming convention looks related PlayerData and Player Namespace. Any relation?


Is this a special way to create functions for a class of DataBlocks.

I could work with 1 level of script inheritance if i could figure out how it works.





Thanks in advance for help