What Are You Working On? V13

[esalaka]

[QUOTE=geel9;25596013]——it's near impossible to cheat.[/QUOTE]

Say, where have I seen this before?

[Geel]

[QUOTE=esalaka;25596185]Say, where have I seen this before?[/QUOTE]

Somewhere where I didn't research it properly.

[neos300]

WHAT THE HELL

Box2D is a fucking piece of shit. Their 'manual' isn't up to date and the code in it doesn't compile.
Also, they make you intialize b2World in a ctor, and you can't do it in your own little init function.

GAAHHHHH

Is there anyway to reinit a object in a constructor? I have this

[cpp]
class blah
{
private:
//blah
b2World box_world;
};

blah::blah()
{
box_world = new b2World(gravity, sleep);
}
[/cpp]

Yet I just get some crap about the operator= only able to be assigned to a b2World.

help

[Geel]

Oh god the AS3 docs are even worse.

[editline]23rd October 2010[/editline]

For Box2D, that is

[neos300]

Should I just switch to Chipmunk or something? Box2D is just a mess.

[MakeR]

[QUOTE=neos300;25596816]WHAT THE HELL

Box2D is a fucking piece of shit. Their 'manual' isn't up to date and the code in it doesn't compile.
Also, they make you intialize b2World in a ctor, and you can't do it in your own little init function.

GAAHHHHH

Is there anyway to reinit a object in a constructor? I have this

[cpp]
class blah
{
private:
//blah
b2World box_world;
};

blah::blah()
{
box_world = new b2World(gravity, sleep);
}
[/cpp]

Yet I just get some crap about the operator= only able to be assigned to a b2World.

help[/QUOTE]

You are trying to assign a value of type b2World* (pointer to b2World) to a variable of type b2World.
Line 5 should be:

[cpp] b2World *box_world;[/cpp]

[neos300]

[QUOTE=MakeR;25597265]You are trying to assign a value of type b2World* (pointer to b2World) to a variable of type b2World.
Line 5 should be:

[cpp] b2World *box_world;[/cpp][/QUOTE]

That kind of worked, except now whenever is use one of box_world's methods I have to use -> instead of . Is that going to mess me up?

[esalaka]

[QUOTE=neos300;25598679]That kind of worked, except now whenever is use one of box_world's methods I have to use -> instead of . Is that going to mess me up?[/QUOTE]

I can't see why you didn't just reinitialize it by box_world = b2World( gravity, sleep );

[Layla]

[media]http://www.youtube.com/watch?v=7nB6fXI87bQ[/media]

tried to make a little video but it doesn't really show off everything I wanted to show :(

the title and description isn't updating for some reason and it's not in wide screen, how long does that normally take?

Oh, I must have captured on a smaller window.

[Geel]

[QUOTE=layla;25598987][media]http://www.youtube.com/watch?v=7nB6fXI87bQ[/media]

tried to make a little video but it doesn't really show off everything I wanted to show :(

the title and description isn't updating for some reason and it's not in wide screen, how long does that normally take?[/QUOTE]

Very nice!

[VeryNiceGuy]

That's awesome! Are those textures from Source?

[neos300]

[QUOTE=esalaka;25598908]I can't see why you didn't just reinitialize it by box_world = b2World( gravity, sleep );[/QUOTE]

I'm an idiot.

Problem solved. Thank you very much!

Fffffffffffff it didn't work.

Still getting:
error: no matching function for call to 'b2World::b2World()'

note: candidates are: b2World::b2World(const b2Vec2&, bool)
note: b2World::b2World(const b2World&)

[ScreenNamesSuck]

This probably seems like nothing to you guys, but I finally managed to get DirectX to draw to a child window inside the main window.

[IMG]http://i902.photobucket.com/albums/ac222/ScreenNamesSuck/ChildWindowSuccess.png[/IMG]

I wrote most of my C++ code from scratch.

[BlkDucky]

Just compiled a release version of my game:

[quote]Unhandled exception at 0x7550b727 in RTAdventure.exe: Microsoft C++ exception: std::length_error at memory location 0x0041f888..[/quote]

:eng99:

I have no idea why this happens in release, but not in debug...

[Chandler]

[QUOTE=neos300;25600047]I'm an idiot.

Problem solved. Thank you very much!

Fffffffffffff it didn't work.

Still getting:
error: no matching function for call to 'b2World::b2World()'

note: candidates are: b2World::b2World(const b2Vec2&, bool)
note: b2World::b2World(const b2World&)[/QUOTE]

Okay, I noticed you don't seem to be using an initializer list, which will help you, so you [i]don't[/i] have to use "->" over "." (Though technically object->member is like doing (*object).member, but that's pedantry at this point). Here's an example.

[cpp]
class blah
{
public:
/* I don't know what Box2D takes so I'm just guessing :V*/
explicit blah(const b2Vec2& gravity, bool sleep) : box_world(b2World(gravity, sleep)) { }

private:
b2World box_world;
};
[/cpp]

If that doesn't work, you can #include <memory> and make it an "auto_ptr<b2World> box_world". The wonders of C++. :smith:

[QUOTE=BlkDucky;25600179]Just compiled a release version of my game:
I have no idea why this happens in release, but not in debug...[/QUOTE]

You should be able to add debug info for a release build. You won't get full introspection (am I using that word right? I've never had the opportunity), but you'll be able to see where it's happening.

[Layla]

[QUOTE=VeryNiceGuy;25600034]That's awesome! Are those textures from Source?[/QUOTE]

Yeah but I wrote BLOCK 512 X 512 over them

[noctune9]

[QUOTE=esalaka;25595804]This would be interesting if it could be used for open games that have no central servers.

[editline]24th October 2010[/editline]

Also, how about a P2P approach? :3:[/QUOTE]

I don't really see how I could do a P2P approach could make it much more efficient, and it would make it a lot more complex.

[neos300]

[QUOTE=Chandler;25600270]Okay, I noticed you don't seem to be using an initializer list, which will help you, so you [i]don't[/i] have to use "->" over "." (Though technically object->member is like doing (*object).member, but that's pedantry at this point). Here's an example.

code

If that doesn't work, you can #include <memory> and make it an "auto_ptr<b2World> box_world". The wonders of C++. :smith:[/QUOTE]

Neither worked. :smithicide:

It still says:
error: no matching function for call to 'b2World::b2World()'
note: candidates are: b2World::b2World(const b2Vec2&, bool)
note: b2World::b2World(const b2World&)

when I have box_world = b2World(box_gravity, box_sleep);

[rrkpp_]

[QUOTE=layla;25598987][media]http://www.youtube.com/watch?v=7nB6fXI87bQ[/media]

tried to make a little video but it doesn't really show off everything I wanted to show :(

the title and description isn't updating for some reason and it's not in wide screen, how long does that normally take?

Oh, I must have captured on a smaller window.[/QUOTE]

Thats fantastic! If you don't mind me asking, what engine/API did you use to write that?

[esalaka]

[QUOTE=noctune9;25600349]I don't really see how I could do a P2P approach could make it much more efficient, and it would make it a lot more complex.[/QUOTE]

Not necessarily efficient but decentralized. You would'n need to query some central server for every request when there's peers to share the information about servers to you.

[Layla]

[QUOTE=Kopimi;25600706]Thats fantastic! If you don't mind me asking, what engine/API did you use to write that?[/QUOTE]

It's a custom built game using OpenGL.

[Geel]

[QUOTE=esalaka;25600772]Not necessarily efficient but decentralized. You would'n need to query some central server for every request when there's peers to share the information about servers to you.[/QUOTE]

But you'd need a central server to find the peers.

[esalaka]

[QUOTE=geel9;25600902]But you'd need a central server to find the peers.[/QUOTE]

I know, but regardless of which method you use, you [B]still[/B] need a central server or few. It was just a suggestion.

[Geel]

[QUOTE=esalaka;25600997]I know, but regardless of which method you use, you [B]still[/B] need a central server or few. It was just a suggestion.[/QUOTE]

Although I do get your point, lessen the main server load.

[ZeekyHBomb]

[QUOTE=neos300;25596816]WHAT THE HELL

Box2D is a fucking piece of shit. Their 'manual' isn't up to date and the code in it doesn't compile.
Also, they make you intialize b2World in a ctor, and you can't do it in your own little init function.

GAAHHHHH

Is there anyway to reinit a object in a constructor? I have this

[cpp]
class blah
{
private:
//blah
b2World box_world;
};

blah::blah()
{
box_world = new b2World(gravity, sleep);
}
[/cpp]

Yet I just get some crap about the operator= only able to be assigned to a b2World.

help[/QUOTE]

[cpp]class blah
{
public:
blah():box_world(b2Vec(0, 0), true){}
void init(const b2Vec &gravity, const bool sleep){ box_world = b2World(gravity, sleep); }

private:
b2World box_world;
};[/cpp]
Or if that doesn't work
[cpp]class blah
{
public:
void init(const b2Vec &gravity, const bool sleep){ box_world = new b2World(gravity, sleep); }

private:
std::auto_ptr<b2World> box_world;
};[/cpp]
and access b2World-members via -> or
[cpp]class blah
{
public:
void init(const b2Vec &gravity, const bool sleep){ box_world = std::auto_ptr<b2World>(new b2World(gravity, sleep)); }
b2World& getWorld(){ return *box_world; }

private:
std::auto_ptr<b2World> box_world;
};[/cpp]
and access via getWorld().member.

[Chandler]

Exceptions in C++ aren't the best. But sometimes, I question whether I should just use them. Otherwise I end up doing something reckless, and dangerous. :smithicide:

[cpp]
namespace {

std::pair<std::vector<std::string>, std::vector<std::string> >
get_items(const std::string& path)
{
/* once you herp, you just can't */
DIR* dirp = NULL;
dirent* direntp = NULL;
std::vector<std::string> file_list;
std::vector<std::string> path_list;
if (!(dirp = opendir(path.c_str()))) { goto finalize; }
while (!(direntp = readdir(dirp)))
{
switch (direntp->d_type)
{
case DT_DIR:
path_list.push_back(direntp->d_name);
break;
case DT_REG:
file_list.push_back(direntp->d_name);
break;
case DT_LNK:
char buffer[MAXPATHLEN + 1];
ssize_t length = readlink(direntp->d_name, buffer, MAXPATHLEN + 1);
// symlink_list.push_back(std::string(buffer, length));
break;
case default: break;
}
}
finalize:
return std::pair(file_list, path_list);
}

} /* internal linkage */
[/cpp]
I may just end up throwing an exception instead :colbert:

[neos300]

[QUOTE=ZeekyHBomb;25601388][cpp]class blah
{
public:
blah():box_world(b2Vec(0, 0), true){}
void init(const b2Vec &gravity, const bool sleep){ box_world = b2World(gravity, sleep); }

private:
b2World box_world;
};[/cpp]
Or if that doesn't work
[cpp]class blah
{
public:
void init(const b2Vec &gravity, const bool sleep){ box_world = new b2World(gravity, sleep); }

private:
std::auto_ptr<b2World> box_world;
};[/cpp]
and access b2World-members via -> or
[cpp]class blah
{
public:
void init(const b2Vec &gravity, const bool sleep){ box_world = std::auto_ptr<b2World>(new b2World(gravity, sleep)); }
b2World& getWorld(){ return *box_world; }

private:
std::auto_ptr<b2World> box_world;
};[/cpp]
and access via getWorld().member.[/QUOTE]

The second method just gives me operator= errors

[ZeekyHBomb]

[QUOTE=Chandler;25601558]Exceptions in C++ aren't the best. But sometimes, I question whether I should just use them. Otherwise I end up doing something reckless, and dangerous. :smithicide:

[cpp]/*codesnip*/[/cpp]
I may just end up throwing an exception instead :colbert:[/QUOTE]

[cpp]namespace {

typedef std::pair<std::vector<std::string>, std::vector<std::string> > Itemspair;

Itemspair
get_items(const std::string& path)
{
/* once you herp, you just can't */
Itemspair itemspair; //construct the pair directly
if (DIR* dirp = opendir(path.c_str())
{
dirent* direntp;
while (!(direntp = readdir(dirp))) //you sure you want to negate that expression?
{
switch (direntp->d_type)
{
case DT_DIR:
itemspair.first.push_back(direntp->d_name);
break;
case DT_REG:
itemspair.second.push_back(direntp->d_name);
break;
case DT_LNK:
char buffer[MAXPATHLEN + 1];
ssize_t length = readlink(direntp->d_name, buffer, MAXPATHLEN + 1);
// symlink_list.push_back(std::string(buffer, length));
break;
case default: break;
}
}
}
//no need to destruct dirp?
return itempair;
}

} /* internal linkage */[/cpp]
:3?

[editline]24th October 2010[/editline]

[QUOTE=neos300;25601760]The second method just gives me operator= errors[/QUOTE]

box_world = [b]std::auto_ptr<b2World>([/b]new b2World(gravity, sleep)[b])[/b]; }

Also, from the looks of it you should read up a bit on pointers and heap allocation (operator new) as well as smart pointers.

[Richy13]

Just wondering but is this book any good for learning OpenGL?
[url]http://www.amazon.co.uk/OpenGL-Programming-Guide-Official-Learning/dp/0321552628/ref=sr_1_1?ie=UTF8&qid=1287875903&sr=8-1[/url]

[neos300]

[QUOTE=ZeekyHBomb;25601877][cpp]namespace {

typedef std::pair<std::vector<std::string>, std::vector<std::string> > Itemspair;

Itemspair
get_items(const std::string& path)
{
/* once you herp, you just can't */
Itemspair itemspair; //construct the pair directly
if (DIR* dirp = opendir(path.c_str())
{
dirent* direntp;
while (!(direntp = readdir(dirp))) //you sure you want to negate that expression?
{
switch (direntp->d_type)
{
case DT_DIR:
path_list.push_back(direntp->d_name);
break;
case DT_REG:
file_list.push_back(direntp->d_name);
break;
case DT_LNK:
char buffer[MAXPATHLEN + 1];
ssize_t length = readlink(direntp->d_name, buffer, MAXPATHLEN + 1);
// symlink_list.push_back(std::string(buffer, length));
break;
case default: break;
}
}
}
//no need to destruct dirp?
return itempair;
}

} /* internal linkage */[/cpp]
:3?

[editline]24th October 2010[/editline]

box_world = [b]std::auto_ptr<b2World>([/b]new b2World(gravity, sleep)[b])[/b]; }

Also, from the looks of it you should read up a bit on pointers and heap allocation (operator new) as well as smart pointers.[/QUOTE]

There we go.

Yeah the book I had for learning C++ basically said 'use references'

Not much help.