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Inheritance / Pointers Question

Peon · 2003-11-09T05:52:38

In my engine, I have a list of objects in a dynamic array of type cGameObject* . From cGameObject, I derive a whole slew of objects, including things like cShip, cProjectile, etc... which I can put into my array (since it is of type cGameObject* ) Each of these objects has some virtual functions. The whole point of the array is to act as a "library" of sorts. When I need a new object, I call a "CreateObject" function with the correct ID and a new object of the correct type is added to the library. I''d like to do it this way, because all the objects read in certain stats from a text file at runtime (things like shields for ships, speed for projectiles, etc... ) Doing this everytime would be prohibitively expensive, so I made an array where I could just copy objects from. That was just the setup, now the problem. The problem is that it doesn''t quite work as I had hoped. I can add new objects to the array, and it works fine. The problem happens when I want to make a new object (a copy, basically) My CreateObject function (as I originally saw it) would deference an object and assign it to a second object, essentially copying it. The second object would be added to a list of all objects in the world. I didn''t think of this beforehand but if I deference the library object to make a copy, I won''t have access to the virtual functions of the correct object anymore. I can''t just assign the pointer of the library object to a new object and add that to the object listing, because I might need the same type of object later on. Any ideas, short of creating a HUGE initializer list, and just reassigning all the variables when I want to make a copy of it from the library list? Is this even a good approach at all? -=Peon=- : A Poorly Implement Forum Bot © Kordova, 2003

General and Gameplay Programming Programming

Started by Peon November 05, 2003 10:23 PM

20 comments, last by Peon 20 years, 5 months ago

SiCrane

11,840

November 09, 2003 05:51 AM

/DWIM ? Doesn''t show up in MSDN either in index or the search.

Fruny

1,658

November 09, 2003 05:52 AM

quote:Original post by SiCrane
/DWIM ? Doesn''t show up in MSDN either in index or the search.

Try some better documentation

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." — Brian W. Kernighan

Inheritance / Pointers Question

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