A different onCollision for each object

#1 One method for accomplishing this is to set a callback variable on each object and then in the global onCollision function use the 'call' command to execute it, something like:

%object.onCollisionCallback = "myobjectCollisionCallback";


function t2dSceneObject::onCollision(%srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts)
{
   if (%srcObj.onCollisionCallback !$= "")
   {
      call(%srcObj.onCollisionCallback, %srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts);
   }
}

function myobjectCollisionCallback(%srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts)
{
   // Do collision stuff for this type of object
}

#2 Oh yeah, that's smart. Didn't know about that call function, but now that you mention it I guess I coulda figured that out with 'eval'.

Thanks!

#3 I think a better approach would be to assign different classes to your objects, e.g.

%rolling = new t2dStaticSprite() { class = rollingClass; };
%stone = new t2dStaticSprite() { class = stoneClass; }

and create separate callback handlers for every class

rollingClass::onCollision( ... ) { ... }
stoneClass::onCollision( ... ) { ... }

This way you can create different collision logic for different objects and even group collision behavoiur more easily with less code.

#4 Yes, but at the time the original post was written, that functionality didn't exist in TGB. :)

#5 Im using torque 1.5.2 and im trying to write up a collision function that will damage the player if its colliding with a badguy(faking melee) but not if its running into a wall

my collision function is

function playerBody::onCollision(%this,%obj,%col)
{
if(//the thing you ran into is the baddie)
schedule(3000, 0, "hurtPlayer");

}

hurtPlayer of course is another function ive written, the problem is that i cant figure out what to make the condition of the if statement... right now the player gets hurt everytime he hits a buildig or falls or walks into a pick up... HELP lol

#6 Did you enable the collision callback for you object?

Also, consider using the formal callback signature:

function t2dSceneObject::onCollision(%srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts)  
{  
  //put collision code here.
}

#7 I ended up fixing it with

function playerBody::onCollision(%this,%obj,%col)
{
%classy = %col.getClassName();
if(%classy $= "AIPlayer")
schedule(3000,0,"hurtPlayer")
}