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UF

获取指定图层所有几何对象

WenzhouXv
2024-06-11 / 0 评论 / 0 点赞 / 20 阅读 / 0 字

获取指定图层所有几何对象

static int allocate_memory(unsigned int nbytes, void **where)
{
    int
        resp;

    *where = UF_allocate_memory(nbytes, &resp);

    return resp;
}

static int make_an_array(uf_list_p_t *object_list, tag_t **objects)
{
    int
        ii,
        n;
    uf_list_p_t
        temp;

    UF_CALL(UF_MODL_ask_list_count(*object_list, &n));

    UF_CALL(allocate_memory(n * sizeof(tag_t), (void **)objects));

    for (ii = 0, temp = *object_list; ii < n; temp = temp->next, ii++)
        (*objects)[ii] = temp->eid;

    UF_CALL(UF_MODL_delete_list(object_list));

    return n;
}

static int ask_all_objects_on_layer(int layer, tag_t **objects)
{
    tag_t
        object = NULL_TAG;
    uf_list_p_t
        list;

    UF_CALL(UF_MODL_create_list(&list));

    while (!UF_CALL(UF_LAYER_cycle_by_layer(layer, &object)) &&
        (object != NULL_TAG)) UF_CALL(UF_MODL_put_list_item(list, object));

    return make_an_array(&list, objects);
}    
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