Thread: struct pointers

Hi!

I was wondering how it would be done to point to struct, like this

you have two dif structs

Code:

typedef struct {
     float face1,face2,face3;
    char name[200];
     int num_objs;

} object_list;

typedef struct {
     scene_name
       
}scenes;


object_list obj[50];
scenes scene[50];

where scene would be 1 element, and pointing to several objects with in the

(this is pseudo and what i want todo)

scene[0].obj[0].numobj;

result with how many objects there are in scene 0, right now i add the start object and the end object into the scene struct so, when drawing the 3d object, i do
this more or less.

Code:

for (counter=startobj;counter<endobj;counter++)

anyone could elaborate how i could do this?

Any help are appricated!

- seidel

If you're asking how to iterate through a series of structs, you have at least two options. Here they are in somewhat-pseudo-code:


As an array

Code:

my_type objects[50];
int length = 50;
...
for(i = 0; i < length; i++) {
     // Do some stuff with objects[i]
}

As a linked list (i.e. the struct contains a pointer that is used to point to the next instance in the series)

Code:

struct my_type {
    int data[50];
    struct my_type * next;
} current;
...
for(current = start; current.next != NULL; current = current.net) {
    // Do some stuff with current
}

For one thing, struct scene DOES NOT contain an 'obj', so your 'scene[0].obj[0].numobj;' is completely bogus.

To do what you want to do, you would have to include the structure 'object_list' INSIDE your scene struct.

Code:

typedef struct {
     float face1,face2,face3;
    char name[200];
     int num_objs;

} object_list;

typedef struct {
     scene_name
     struct object_list[50];
       
}scenes;