void add_field( int x, int y, int z,int r, int age, int type, struct item_data *item,int n1, int n2)
{
	struct field_data *f;
	struct item_data *titem;

	titem = find_item(item);

	f				= (field_data*) new field_data();
	f->next			= field_list;
	field_list		= f;

	f->x			= x;
	f->y			= y;
	f->z			= z;
	f->radius		= r;
	f->age			= age;
	f->type			= type;
	f->item			= titem;

	f->n1			= n1;
	f->n2			= n2;

}