C / OpenGL question..

[odi3]

C / opengl question:

Can i do this?

code:

typedef struct     {       int i;     }widget;     display(void){        widget newWidget2;        newWidget2.i = 5;        newWidget1 = newWidget2; // Can i update widget1.i using this line?     }     void main(){        widget newWidget1;     ...        glutDisplayFunc(display);     ...     }

thanks!

[Dan]

The first issue with this code is that newWidget1 is declaired in the main function. This means it only has scope in the main function and can not be accessed in display like you are doing.

You probly whont to decalire newWidget1 in display or golbaly.

Also the display function needs a type (probly void) this is probly just a type-o in the code you posted.

Behond all that, the line you commented will work. It will make newWidget1 a copy of newWidget2 with all of the same values.

Here is a small demo i made of it:

c:

#include <stdio.h>  #include <stdlib.h>    typedef struct     {       int i;     }widget;     int main(){        widget newWidget1;                widget newWidget2;        newWidget2.i = 5;        printf("%d\n", newWidget2.i);        newWidget1 = newWidget2;                printf("%d\n", newWidget1.i);                newWidget1.i = 10;                printf("%d\n", newWidget2.i);        printf("%d\n", newWidget1.i);                getchar();        return 0;     }

Edit: Note that the above code is just to show that newWidget1 = newWidget2; makes a copy of newWidget2 in newWidget1 of shorts and does not just point to it. You should not copy and past this code in to your program as it does nothing usefull :p

[odi3]

ah ok,

I was thinking since display was being referenced in main, that it would inherit the objects...

guess not haha,

thnx