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CGAL 4.6 - Kinetic Framework
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Kinetic::ActiveObjectsTable Concept Reference
Main Concepts

Definition

This container holds a set of objects of a particular type. It creates notifications using the standard Multi_listener<Interface> interface when a primitive changes or is added or deleted. Objects which are listening for events can then ask which primitives changed.

For speed, modifications to the Kinetic::ActiveObjectsTable can be grouped into editing sessions. A session is begun by calling set_is_editing(true) and ended by calling set_is_editing(false). There is one type of notification, namely, Listener::IS_EDITING which occurs when the editing mode is set to false, signaling that a batch of changes is completed.

As an convenience, the change methods can be called without setting the editing state to true, this acts as if it were set to true for that one function call.

Has Models:
CGAL::Kinetic::Active_objects_vector<MovingObject>
See Also
Multi_listener<Interface>
CGAL::Kinetic::Active_objects_listener_helper<ActiveObjectsTable, KDS>

Types

typedef unspecified_type Key
 A key identifying an object in the table.
 
typedef unspecified_type Data
 The type being stored in the table.
 
typedef unspecified_type Listener
 The base class to derive from for listening for runtime events.
 

Iterators

The following types are iterators.

Each type, Foo_iterator has two corresponding methods foo_begin and foo_end which allow you to iterate through the objects in the set Foo.

typedef unspecified_type Key_iterator
 An iterator through all the valid keys in the table.
 
typedef unspecified_type Changed_iterator
 An iterator through all the objects which have been changed in the last editing session. More...
 
typedef unspecified_type Inserted_iterator
 An iterator through all the objects which were added in the last editing session.
 
typedef unspecified_type Erased_iterator
 An iterator through all the objects which were deleted in the last editing session.
 

Operations

Data operator[] (Key key) const
 Access the object referenced by the key.
 
Data at (Key key) const
 Access the object referenced by the key.
 
void set_is_editing (bool is_editing)
 Set the editing state of the object. More...
 
bool is_editing () const
 Access the editing state.
 
void set (Key key, Data object)
 This method changes the motion of one moving object. More...
 
Key insert_object (Data ob)
 Insert a new object into the table and return a Key which can be used to refer to it. More...
 
void erase (Key key)
 Delete an object from the table. More...
 
void clear ()
 Remove all objects from the table and free all storage.
 
void is_set (Key) const
 Returns true if the object has been set in the currently notified editing session. More...
 
void is_new (Key) const
 Returns true if the object has been set in the currently notified editing session.
 
void clear (Key) const
 Returns true if the object has been set in the currently notified editing session.
 

Member Typedef Documentation

typedef unspecified_type Kinetic::ActiveObjectsTable::Changed_iterator

An iterator through all the objects which have been changed in the last editing session.

The iterator iterates through the objects in lexicographical order.

Member Function Documentation

void Kinetic::ActiveObjectsTable::erase ( Key  key)

Delete an object from the table.

The object with Key key must already be in the table. This does not necessarily decrease the amount of storage used at all. In fact, it is unlikely to do so. See set(Key,Data) for an explainating of how the editing modes are used.

Key Kinetic::ActiveObjectsTable::insert_object ( Data  ob)

Insert a new object into the table and return a Key which can be used to refer to it.

See set(Key, Data) for a description of editing modes.

void Kinetic::ActiveObjectsTable::is_set ( Key  ) const

Returns true if the object has been set in the currently notified editing session.

Note that this method can only be saftely called when processing an IS_EDITING notification.

void Kinetic::ActiveObjectsTable::set ( Key  key,
Data  object 
)

This method changes the motion of one moving object.

The position at the current time should not be different from the previous current position. However, at the moment I do not check this as there is no reference to time in the Kinetic::ActiveObjectsTable. If is_editing() is not true, then it is as if the calls set_is_editing(true), set(key, value) and finally set_is_editing(false) were made. If it is true, then no notifications are created.

void Kinetic::ActiveObjectsTable::set_is_editing ( bool  is_editing)

Set the editing state of the object.

A notification is sent when the editing state is set to false after it has been true, i.e. the editing session is finished. This allows changes to be batched together.