function PlayerFish::modifyLife(%this, %dmg) { %this.life += %dmg;

#1 If the code looks like this:

function PlayerFish::modifyLife(%this, %dmg) 
{ 
   %this.life += %dmg;
}

Then %dmg is an argument that is passed to the modifyLife function. So if you called...

%fishObject.modifyLife(-10)

...then %dmg would be equal to -10.

This assumes %fishObject is an object with class PlayerFish.

#2 function PlayerFish::modifyLife(%this, %dmc)
{
%this.life = %dmc + %this.life;


if(%this.life > 100)
{
%this.life = 100;
} else if (%this.life < 0)
{
%this.life = 0;
}


if(%this.life <= 30)
{
%this.dead();
} else
{
%this.updateLifeSize();
}
}
function PlayerFish::updateLifeSize(%this)
{
%lifeMultiplier = %this.life / 100;


%newWidth = %this.maxWidth * %lifeMultiplier;
%newHeight = %this.maxHeight * %lifeMultiplier;

%this.setSize(%newWidth, %newHeight);
}
function PlayerFish::dead(%this)
{
%this.setFlipY(true);
%this.setLinearVelocityY(-10);
%this.dead = true;
}
function PlayerFish::lowerLife(%this)
{
%this.modifyLife(%this.lifeDrain);

if(!%this.dead)
{
%this.schedule(5000, "lowerLife");
}
}
this is the code, we dont use the dmg any longer,
ok its an argumant we pass to the function but when we havent defined it anywhere before ,how can we use it ?

#3 Again, it's an argument, so it's defined in the function definition. It's scope is only valid within that function.

#4 thanks that you repeat your answer,
would u tell me for the third time that where can i learn whole the tgb functions, and its methods ?

#5 thanks alot for your answers

#6 Have you seen the documentation that comes with the engine? It has all of the TGB functions and methods.

#7 im studying it, and im in the middle of the way,exactly the scond part of mole tutorial,but should i read the tdn resources or the offline documention is complete and theres no need to reeading anything more ?