 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
In article <7p5uatkfp1lg0lluhftkg2ad9okphd814a@4ax.com> , Peter Popov
<pet### [at] vip bg> wrote:
> Lastly, a side question. Are there license-free, public-domain,
> cross-platform examples of polymorphic sorted lists, binary, quad- and
> oct-trees or should I make them myself?
You just use the "polymorphic reference type" - others might call it "a
pointer" :-)
Lets say you have something like this (abbreviated syntax):
class Base;
class Building : Base;
class House : Building;
class Tower : Building;
class Garage : Building;
And you want to store all buildings, you just do:
vector<Building *> buildings;
You can access individual objects in a type safe manner like this:
House *house = dynamic_cast<House *>(buildings[3]);
If is was a House dynamic_cast returns a valid pointer to a House. If
not, it return NULL. Note that dynamic_cast throws exceptions if you
cast references.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
In article <7p5uatkfp1lg0lluhftkg2ad9okphd814a@4ax.com> , Peter Popov
<pet### [at] vipbg> wrote:
> sorted lists, binary, quad- and
> oct-trees or should I make them myself?
BTW, the STL does provides these in some form or the other. However, it
depend on exactly what you want to do.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
Post a reply to this message
|
|
| |
| |
|
|
From: Roberto Ferrer de Amorim
Subject: Re: Pass a POV object to a class
Date: 14 Mar 2001 12:41:00
Message: <3aafad2c@news.povray.org>
|
|
|
| |
| |
|
|
> Lastly, a side question. Are there license-free, public-domain,
> cross-platform examples of polymorphic sorted lists, binary, quad- and
> oct-trees or should I make them myself? Granted, I will eventually do
> so since this is my final year project and I want to have done as much
> as possible myself when I defend it, but until then, it can save me
> some brain cells.
glib is a very good library, but it's in C. AFAIK, it can be polimorphic and
has all sorts of lists and trees, but take a look yourself on it. Here's the
link to download:
ftp://ftp.gtk.org/pub/gtk/v1.2/glib-1.2.9.tar.gz
About 400k. Take a look and see if it fits - however, you can always use the
STL on C++, although I do not recommend you do that. :-)
Wolfox
- I used to program in C++, then I found Java. I used to program in Java,
then I found Python (http://www.python.org/)
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
In article <lr1vat057106tpcd2cp26m8glphl24i7vf@4ax.com>, David Wilkinson
says...
> I can't help you with your problems Peter, but I too have fallen for C++ having
> recently installed Borland C++ Builder 4 for free from the PCAnswers magazine
> CD. This really does simplify developing programs for MS Windows.
> The idea of overloading vector operators to use POV code is an interesting idea
> that I must investigate.
> ----------------------
> dav### [at] hamiltonitecom
> http://hamiltonite.com/
>
Welcome to C++Builder, David! I had versions 1,2,3, skipped 4 and now 5.
Suppose it will last for the time remaining: the upgrades are too
expensive. I use it for my (as the expression goes in Dutch) "house,
garden and kitchen programs", since I'm not much of a programmer at
all... Although I did the Windows frontend for CMPEG with it. :)
--
Regards, Sander
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Wed, 14 Mar 2001 15:14:09 +0100, "Mael" <Mae### [at] hotmailcom>
wrote:
>you can use an OBJECT* and call Inside_Object :
>Inside_Object (VECTOR IPoint, OBJECT *Object)
But isn't OBJECT a struct? I mean, I know it works for classes (that's
how I fit them all in the same list) but I didn't know it worked for
structs.
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG e-mail : pet### [at] tagpovrayorg
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Wed, 14 Mar 2001 09:41:48 -0600, "Thorsten Froehlich"
<tho### [at] trfde> wrote:
>You just use the "polymorphic reference type" - others might call it "a
>pointer" :-)
Thorsten, that's what I am doing now :) I just realised that people
have done it before a million times and someone might have chosen to
share his code with newbies, 's all.
I might use the one in STL, the problem is, I don't have any
description of the STL and I don't feel like hacking into libc.a again
:)
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG e-mail : pet### [at] tagpovrayorg
Post a reply to this message
|
|
| |
| |
|
|
From: Roberto Ferrer de Amorim
Subject: Re: Pass a POV object to a class
Date: 15 Mar 2001 07:48:33
Message: <3ab0ba21@news.povray.org>
|
|
|
| |
| |
|
|
Check http://www.mindview.net/ . There is an online (downloadable) book
there called "Thinking in C++". It has a great section about the STL.
Wolfox
Peter Popov <pet### [at] vipbg> wrote in message
news:3lm0bt0llofncm7ert3i1vgv3d2ua1rlsv@4ax.com...
> On Wed, 14 Mar 2001 09:41:48 -0600, "Thorsten Froehlich"
> <tho### [at] trfde> wrote:
>
> >You just use the "polymorphic reference type" - others might call it "a
> >pointer" :-)
>
> Thorsten, that's what I am doing now :) I just realised that people
> have done it before a million times and someone might have chosen to
> share his code with newbies, 's all.
>
> I might use the one in STL, the problem is, I don't have any
> description of the STL and I don't feel like hacking into libc.a again
> :)
>
>
> Peter Popov ICQ : 15002700
> Personal e-mail : pet### [at] vipbg
> TAG e-mail : pet### [at] tagpovrayorg
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Thu, 15 Mar 2001 08:00:50 +0200, Peter Popov wrote:
>On Wed, 14 Mar 2001 15:14:09 +0100, "Mael" <Mae### [at] hotmailcom>
>wrote:
>
>>you can use an OBJECT* and call Inside_Object :
>>Inside_Object (VECTOR IPoint, OBJECT *Object)
>
>But isn't OBJECT a struct? I mean, I know it works for classes (that's
>how I fit them all in the same list) but I didn't know it worked for
>structs.
It is a struct, but one of its members is an array of pointers to functions.
A C++ programmer might call it a vtable.
The first C++ compilers compiled to C, you know.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Thu, 15 Mar 2001 09:47:39 -0300, "Roberto Ferrer de Amorim"
<ram### [at] comdescontocombr> wrote:
>Check http://www.mindview.net/ . There is an online (downloadable) book
>there called "Thinking in C++". It has a great section about the STL.
I will gladly RTFM right away! I have that book in three different
formats and even started reading it. Sheesh!
<head up mine>
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG e-mail : pet### [at] tagpovrayorg
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
In article <7p5uatkfp1lg0lluhftkg2ad9okphd814a@4ax.com>, Peter Popov
<pet### [at] vipbg> wrote:
> I remember Chris Huff wrote a patch-HOWTO some time ago, some
> up-to-date advice along the same lines would be very appreciated.
Unfortunately, my patch tutorial didn't cover integrating C++ code with
C, something that I've never done and hope never to do. I vaguely recall
saving some messages about doing this, though...I could look around and
see if I still have them, if you want. I'm pretty sure they came from
this server and this group...
--
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
<><
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
