Hi there,
I'm having trouble with my program, which crashes when accessing values through a pointer. I've created a sample program that demonstrates my problem.
Little synopsis:
A Character has 2 attributes, a Bone, and a vector of pointers to Bones.
I have a parser file that has functions to create a Character.
Another file calls the functions in the parser file
Character.h
#ifndef GUARD_Character_h
#define GUARD_Character_h
#include <iostream>
#include <vector>
#include <string>
#include "Bone.h"
#include "Character.h"
class Character {
public:
// ATTRIBUTES
std::vector<Bone> bones;
std::vector<Bone*> bone_pointers;
// CONSTRUCTORS
Character() {};
// ACCESSORS
std::vector<Bone>& get_bones()
{
return bones;
};
void add_ptrs(std::vector<Bone*> b)
{
bone_pointers = b;
};
void add_bones(std::vector<Bone> b)
{
bones = b;
};
};
#endifBone.h
#ifndef GUARD_Bone_h
#define GUARD_Bone_h
#include <string>
#include <vector>
#include <iostream>
class Bone {
public:
// ATTRIBUTES
std::string bone_id;
std::vector<Bone*> children;
// CONSTRUCTORS
Bone(std::string s)
{
bone_id = s;
};
// ACCESSORS
std::string& get_id()
{
return bone_id;
};
std::vector<Bone*>& get_children()
{
return children;
};
// MANIPULATORS
void add_child(Bone* child)
{
children.push_back(child);
};
};
#endifParser functions
Character& load_x_file()
{
static Character ch = load_character();
cout << "##COUT NO. 1## In 'load_x_file()', Character::bone pointer is: " << (*ch.bone_pointers[0]).get_id() << endl;
return ch;
}
// Constructs a Character with bones and vector of pointers
Character& load_character()
{
static Character ret;
vector<Bone> bones = read_skeleton();
vector<Bone*> bone_ptrs = read_skinning_info(bones);
ret.add_bones(bones);
ret.add_ptrs(bone_ptrs);
cout << "##COUT NO. 2## In 'load_character()', Character::bone pointer is: " << (*ret.bone_pointers[0]).get_id() << endl;
return ret;
}
// Creates a vector of 2 bones, Bone one is the parent of bone two
std::vector<Bone>& read_skeleton()
{
static vector<Bone> bones;
Bone b1 = Bone("one");
Bone b2 = Bone("two");
bones.push_back(b1);
bones.push_back(b2);
Bone* ptr = &bones[1];
bones[0].add_child(ptr);
return bones;
}
vector<Bone*>& read_skinning_info(vector<Bone>& bones)
{
Bone* b = &bones[0];
vector<Bone*> bones_ptr;
bones_ptr.push_back(b);
return bones_ptr;
}Here is the main function of another file calling the parser functions:
int main()
{
Character test = load_x_file();
std::cout << "##COUT NO. 3## The pointers in main() point to: " << (*test.bone_pointers[0]).get_id() << std::endl;
}Running the program causes a crash at ##COUT NO. 2##. Running the debugger doesn't pick up any problems (Visual C++ 2008), looking at the values at each point in the program, all pointers look to be pointing at valid values throughout the program.
Can someone please tell me what's going on here? :icon_confused:
Thanks in advance,
Tom
