Re: game development layout question
- From: "Littlefield, Tyler" <tyler@xxxxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Sat, 13 Oct 2007 00:24:17 -0600
note: rtti provides some overhead.
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: Ken Perry
To: programmingblind@xxxxxxxxxxxxx
Sent: Saturday, October 13, 2007 12:13 AM
Subject: RE: game development layout question
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
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, 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
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
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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