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C++ Array Size Limit?

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Join Date: Sep 2008

Posts: 379

Reputation: tomtetlaw is an unknown quantity at this point

Solved Threads: 4

tomtetlaw

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Posting Whiz

C++ Array Size Limit?

Oct 26th, 2009

When I try to compile this:

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 C++ Syntax (Toggle Plain Text) 
#define NODES_MAX 100000
extern node_t _nodes[NODES_MAX];
#define NODES_MAX 100000
extern node_t _nodes[NODES_MAX];

It gives me this error:
------ Build started: Project: TheAlienEngine, Configuration: Debug Win32 ------
Compiling...
main.cpp
c:\documents and settings\tom\my documents\visual studio 2008\projects\thealienengine\thealienengine\ae_3d.h(12) : error C2148: total size of array must not exceed 0x7fffffff bytes
Generating Code...
Compiling...
core.cpp
c:\documents and settings\tom\my documents\visual studio 2008\projects\thealienengine\thealienengine\ae_3d.h(12) : error C2148: total size of array must not exceed 0x7fffffff bytes
Generating Code...
Compiling...
ae_3d.cpp
c:\documents and settings\tom\my documents\visual studio 2008\projects\thealienengine\thealienengine\ae_3d.h(12) : error C2148: total size of array must not exceed 0x7fffffff bytes
c:\documents and settings\tom\my documents\visual studio 2008\projects\thealienengine\thealienengine\ae_3d.cpp(7) : error C2148: total size of array must not exceed 0x7fffffff bytes
c:\documents and settings\tom\my documents\visual studio 2008\projects\thealienengine\thealienengine\ae_3d.cpp(7) : error C2148: total size of array must not exceed 0x7fffffff bytes
Generating Code...
Build log was saved at "file://c:\Documents and Settings\tom\My Documents\Visual Studio 2008\Projects\TheAlienEngine\TheAlienEngine\Debug\BuildLog.htm"
TheAlienEngine - 5 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I can only get it to compile if I lower this limit to around 500.. this is not acceptable because I'm making a 3D engine and every object in my world will be a node_t...

Is there any way to fix this?

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•

Join Date: May 2008

Posts: 97

Reputation: sureronald is an unknown quantity at this point

Solved Threads: 16

sureronald sureronald is offline

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Junior Poster in Training

Oct 26th, 2009

How about using C++ vectors?

Catch me here!

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Join Date: Sep 2008

Posts: 379

Reputation: tomtetlaw is an unknown quantity at this point

Solved Threads: 4

tomtetlaw

Offline

Posting Whiz

Oct 26th, 2009

I did that, and now it compiles, but now when I run it I get this:
Unhandled exception at 0x00419537 in TheAlienEngine.exe: 0xC00000FD: Stack overflow.

And it points to this:

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std::vector<node_t> _nodes(NODES_MAX);
std::vector<node_t> _nodes(NODES_MAX);

Here is the definition of node_t:

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#ifndef NODE_T
#define NODE_T
 
#include "vec_t.h"
#include "model_t.h"
 
extern int nodes_counter;
 
struct node_t{
	int id;
 
	vec_t origin, position, rotation;
 
	model_t model;
	model_t collision_mask;
 
	void setPosition(vec_t pos)
	{
		position = pos;
	}
 
	void setRotation(vec_t rot)
	{
		position = rot;
	}
};
 
#endif
#ifndef NODE_T
#define NODE_T

#include "vec_t.h"
#include "model_t.h"

extern int nodes_counter;

struct node_t{
	int id;

	vec_t origin, position, rotation;

	model_t model;
	model_t collision_mask;

	void setPosition(vec_t pos)
	{
		position = pos;
	}

	void setRotation(vec_t rot)
	{
		position = rot;
	}
};

#endif

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•

Join Date: Apr 2008

Posts: 17

Reputation: rdrast is an unknown quantity at this point

Solved Threads: 1

rdrast

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Newbie Poster

Oct 26th, 2009

Why are you trying to allocate 100,000 of anything on the stack?
Do you really really really NEED that much storage as an initial allocation?
Maybe you should just use a vector, and add items as necessary?