About remove object

Hi ,my name Nak
I want to remove Object 3D from the scene.
But shadow and physics is don't remove.

Please help me

Similar Messages

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    Does anyone know of an implementation of the java.util.List interface where the the method boolean remove(Object o) is much faster than traversing through the list until it finds the right one? Perhaps something that takes advantage of the hash code of the object being removed?
    Thanks

    So you want a List that acts like a Map?
    Couldn't you just use a Map?
    Explain your problem domain better and we shall help
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    Well no - I would simply like a List that acts like a List, and whose remove(Object) method is faster than just scanning through each element.
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  • Getting information about an object from JList

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  • How to remove objects

    PLEASE How to remove objects from sidebar?
    Can draw folders and files etc in sidebar, but not remove the representation n sidebar. Pulled out objects returns back immediately.
    ~~~~~ k.

    You should be able to drag it off and "Poof" it. Have you released your mouse button?
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  • Dynamically removing objects

    Hi all,
    I am trying to remove objects at run time using a delete button but I keep getting an error saying
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    I can add objects at run time to the scene but cant figure out why I keep getting this error.??
    Any help would be gratefully accepted.
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    I'll assume you have something similar to this:
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    \-----> BranchGroup bg
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    I have some confusions about Order object in ATG. Please see -
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    Is there any scenario where we should use synchronize on Order object?
    An ItemPricingEngine invoked through a price droplet. How/when an OrderPricingEngine gets invoked?
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  • Collection: add(E), remove(Object)

    Hello, all!
    First of all, I guess very strange see interface collection with
    add(E) and remove(Object)... Why is there such collision?
    LinkedList<String> list = new LinkedList<String>();
    Object o = null;
    list.remove(o);NetBeans shows a warning for the last line: Expected type String, actual type Object.
    Eclipse and java compiler do not point to it. So how can I understand this? Netbeans fixed remove(Object) to remove(E)?
    Can you please help to understand the collision?

    mfratto wrote:
    The only warning I get in netbeans is to assign the return value, a boolean, to a new variable.I use netbeans 6.7. Probably, You use another version of netbeans from me, so you do not get the same warning.
    [see screenshort of the netbeans warning|http://i055.radikal.ru/0907/b2/6203e7e22d79.jpg]
    But what that warning is saying is that you declared the LinkedList to contain String objects, but you are trying to remove an Object (which is a parent of String). You can do that, it's just weird to do so. Why wouldn't you just pass a object, a String in this case, of the same type back into list.remove()?
    Edited by: mfratto on Jul 23, 2009 5:42 PMwithout sense, I just would like to understand netbeans behavior and "collision" of add(E) and remove(Object) methods.
    Edited by: aeuo on Jul 23, 2009 8:47 PM the screenshort was changed to more illustrative one

  • LinkedList.remove(Object) O(1) vs O(n)

    The LinkedList class documentation says the following:
    "All of the operations perform as could be expected for a doubly-linked list. Operations that index into the list will traverse the list from the beginning or the end, whichever is closer to the specified index."
    Typically one expects the remove operation from a linkedlist to be O(1). (for example [here on wikipedia|http://en.wikipedia.org/wiki/Linked_list] )
    This is in theory true however typically in the implementation of a LinkedList internally nodes (or Entry<E> in the case of the java implementation) are made that are wrappers around the actual objects inserted in the list. These nodes also contain the references to the next and previous nodes.
    These nodes can be removed from the linked list in O(1). However if you want to remove an a object from the list, you need to map it to the node to be removed. In the java implementation they simply search for the node in O(n). (It could be done without searching but this would require some mapping which requires more memory.)
    The java implementation can be seen here:
        public boolean remove(Object o) {
            if (o==null) {
                for (Entry<E> e = header.next; e != header; e = e.next) {
                    if (e.element==null) {
                        remove(e);
                        return true;
            } else {
                for (Entry<E> e = header.next; e != header; e = e.next) {
                    if (o.equals(e.element)) {
                        remove(e);
                        return true;
            return false;
        }It seems to be a common misconception that this method runs in O(1) while it actually runs in O(n). For example [here in this cheat sheet|http://www.coderfriendly.com/2009/05/23/java-collections-cheatsheet-v2/] and [in this book|http://oreilly.com/catalog/9780596527754/]. I think quite a lot of people think this methode runs in O(1). I think it should be made explicitly clear in the documentation of the class and the method that it runs in O(n).
    On a side note: the remove() operation from the LinkedList iterator does perform in O(1).

    I agree. It's not at all clear what the objection here is.
    To add to Jeff's answer: the remove operation on the LinkedListIterator is O(1) because you don't have to search for the node to unlink - the iterator already has a pointer to it.
    I tend to think of two different operations:
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    - remove - an operation which searches for a given object in the data structure and then removes the node containing that object (using the unlink operation in the case of a linked datastructure). The performance of this depends on the performance of the search and unlink operations. In an unsorted linked list (e.g. the Java LinkedList) the search operation is O(n). So this operation is O(n).

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