RE: game development layout question
- From: "Ken Perry" <whistler@xxxxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Fri, 12 Oct 2007 23:13:35 -0700
Well this can be done several ways. You can use RTTI to check the type or
you can have a function in your class that returns what it is for example
the server I work on has a unit class that has a method GetType that
returns four different const types. The third method is to make these true
virtual classes where each type all have the same methods so that it don't
matter what type you have you just use the method and it does the right
thing. For example if you have a shape class and have triangle, square,
and circle as sub classes. You can have a virtual function that gives you
the area called Area(). It doesn't matter if you are dealing with a square
or a triangle the correct Area function will get called.
Ken
_____
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Graham Hardy
Sent: Friday, October 12, 2007 8:14 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: game development layout question
Hi ken - Further to my message of a moment ago, when you say, 'as you loop
through the array you check what type it is and act accordingly,' how does
this type-checking work? That is, what sort of code is involved to check the
type?
Graham.
_____
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Perry
Sent: October 12, 2007 7:32 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: game development layout question
Actually Tyler I think your missing a large part of OO programming. The
point of c++ is so you can make an object and then inherit that object by
other classes and then be able to make a single array of the type object
that can hold all inherited types. A good example of this is in .net where
you have the Control class. You can actually make an array of type control
and then instantiate each control as button, Combo Box, List Box, etc. Not
many people realize this because they use the GUI method of creating forms
and don't do the dirty work.
In the same way in C# all things are objects or are supposed to be. so you
could make an array of objects and almost instantiate any variable into it
using the new operator. The then as you loop through the array you check
what type it is and act accordingly.
Ken
_____
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Littlefield,
Tyler
Sent: Friday, October 12, 2007 6:39 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: game development layout question
I could use void*, but I would have to cast the pointers--there should be a
cleaner way. :(
Thanks,
Tyler Littlefield.
Vertigo head coder
"My programs don't have bugs, just randomly added features."
msn: tyler@xxxxxxxxxxxxx
email: tyler@xxxxxxxxxxxxx
aim: st8amnd2005
web: tysdomain.com
----- Original Message -----
From: Jim <mailto:jhomme1028@xxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, October 12, 2007 7:31 PM
Subject: Re: game development layout question
Hi Tyler,
In Monopoly, I can have a racecar or a shoe on a square. Shouldn't you be
able to just make a square and then point to the object that is supposed to
be on it or can you somehow just put an object on it? I thought OOP was
supposed to be able to represent the real world.
Thanks.
Jim
__________
Take back your shopping life at http://tinyurl.com/32rsxz
----- Original Message -----
From: Littlefield, <mailto:tyler@xxxxxxxxxxxxx> Tyler
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, October 12, 2007 7:37 PM
Subject: Re: game development layout question
Hello jim,
It might, but if I have an array of objects, the objects would need to be of
mixed-type so I'm able to maybe manage more than one object.
E.g, a vehicle will be a different object from a player, etc.
Thanks,
Tyler Littlefield.
Vertigo head coder
"My programs don't have bugs, just randomly added features."
msn: tyler@xxxxxxxxxxxxx
email: tyler@xxxxxxxxxxxxx
aim: st8amnd2005
web: tysdomain.com
----- Original Message -----
From: Jim <mailto:jhomme1028@xxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, October 12, 2007 5:34 PM
Subject: Re: game development layout question
Hi Tyler,
Unless I am missing something, you could maybe make the squares on the board
objects so that they could be different from one-another. Would that work?
Thanks.
Jim
__________
Take back your shopping life at http://tinyurl.com/32rsxz
----- Original Message -----
From: Littlefield, Tyler <mailto:tyler@xxxxxxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx
Sent: Friday, October 12, 2007 4:47 PM
Subject: game development layout question
Hello list,
I've got a question.
I'm thinking of writing a game in c++.
I want to find a way to make the board and map.
I thought about using an array, but then that would require that all objects
are the same...
Any ideas?
Also, how are race tracks built?
I want to do a bit of racing in the game, just not sure how to lay those
out.
Thanks,
Tyler Littlefield.
Vertigo head coder
"My programs don't have bugs, just randomly added features."
msn: tyler@xxxxxxxxxxxxx
email: tyler@xxxxxxxxxxxxx
aim: st8amnd2005
web: tysdomain.com
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