CMetaInterval

Inheritance:

Methods of CMetaInterval:

Methods of CInterval:

Methods of TypedReferenceCount:

Methods of TypedObject:

Methods of ReferenceCount:

Constants in CMetaInterval:

Constants in CInterval:

CMetaInterval
CMetaInterval::CMetaInterval(string const &name);

Description:

addCInterval
int CMetaInterval::add_c_interval(CInterval *c_interval, double rel_time = (0), CMetaInterval::RelativeStart rel_to = (RS_previous_end));

Description: Adds a new CInterval to the list. The interval will be played when the indicated time (relative to the given point) has been reached.
The return value is the index of the def entry representing the new interval.

addExtIndex
int CMetaInterval::add_ext_index(int ext_index, string const &name, double duration, bool open_ended, double rel_time, CMetaInterval::RelativeStart rel_to);

Description: Adds a new external interval to the list. This represents some object in the external scripting language that has properties similar to a CInterval (for instance, a Python Interval object).
The CMetaInterval object cannot play this external interval directly, but it records a placeholder for it and will ask the scripting language to play it when it is time, via is_event_ready() and related methods.
The ext_index number itself is simply a handle that the scripting language makes up and associates with its interval object somehow. The CMetaInterval object does not attempt to interpret this value.
The return value is the index of the def entry representing the new interval.

clearIntervals
void CMetaInterval::clear_intervals(void);

Description: Resets the list of intervals and prepares for receiving a new list.

getCInterval
CInterval *CMetaInterval::get_c_interval(int n) const;

Description: Return the CInterval pointer associated with the nth interval definition. It is only valid to call this if get_def_type(n) returns DT_c_interval.

getClassType
static TypeHandle CMetaInterval::get_class_type(void);

Undocumented function.

getDefType
CMetaInterval::DefType CMetaInterval::get_def_type(int n) const;

Description: Returns the type of the nth interval definition that has been added.

getEventIndex
int CMetaInterval::get_event_index(void) const;

Description: If a previous call to is_event_ready() returned true, this returns the index number (added via add_event_index()) of the external interval that needs to be played.

getEventT
double CMetaInterval::get_event_t(void) const;

Description: If a previous call to is_event_ready() returned true, this returns the t value that should be fed to the given interval.

getEventType
CInterval::EventType CMetaInterval::get_event_type(void) const;

Description: If a previous call to is_event_ready() returned true, this returns the type of the event (initialize, step, finalize, etc.) for the given interval.

getExtIndex
int CMetaInterval::get_ext_index(int n) const;

Description: Return the external interval index number associated with the nth interval definition. It is only valid to call this if get_def_type(n) returns DT_ext_index.

getIntervalEndTime
double CMetaInterval::get_interval_end_time(string const &name) const;

Description: Returns the actual end time, relative to the beginning of the interval, of the child interval with the given name, if found, or -1 if the interval is not found.

getIntervalStartTime
double CMetaInterval::get_interval_start_time(string const &name) const;

Description: Returns the actual start time, relative to the beginning of the interval, of the child interval with the given name, if found, or -1 if the interval is not found.

getNumDefs
int CMetaInterval::get_num_defs(void) const;

Description: Returns the number of interval and push/pop definitions that have been added to the meta interval.

getPrecision
double CMetaInterval::get_precision(void) const;

Description: Returns the precision with which time measurements are compared. See set_precision().

isEventReady
bool CMetaInterval::is_event_ready(void);

Description: Returns true if a recent call to priv_initialize(), priv_step(), or priv_finalize() has left some external intervals ready to play. If this returns true, call get_event_index(), get_event_t(), and pop_event() to retrieve the relevant information.

popEvent
void CMetaInterval::pop_event(void);

Description: Acknowledges that the external interval on the top of the queue has been extracted, and is about to be serviced by the scripting language. This prepares the interval so the next call to is_event_ready() will return information about the next external interval on the queue, if any.

popLevel
int CMetaInterval::pop_level(double duration = (-1));

Description: Finishes a level marked by a previous call to push_level(), and returns to the previous level.
If the duration is not negative, it represents a phony duration to assign to the level, for the purposes of sequencing later intervals. Otherwise, the level's duration is computed based on the intervals within the level.

pushLevel
int CMetaInterval::push_level(string const &name, double rel_time, CMetaInterval::RelativeStart rel_to);

Description: Marks the beginning of a nested level of child intervals. Within the nested level, a RelativeStart time of RS_level_begin refers to the start of the level, and the first interval added within the level is always relative to the start of the level.
The return value is the index of the def entry created by this push.

setIntervalStartTime
bool CMetaInterval::set_interval_start_time(string const &name, double rel_time, CMetaInterval::RelativeStart rel_to = (RS_level_begin));

Description: Adjusts the start time of the child interval with the given name, if found. This may be either a C++ interval added via add_c_interval(), or an external interval added via add_ext_index(); the name must match exactly.
If the interval is found, its start time is adjusted, and all subsequent intervals are adjusting accordingly, and true is returned. If a matching interval is not found, nothing is changed and false is returned.

setPrecision
void CMetaInterval::set_precision(double precision);

Description: Indicates the precision with which time measurements are compared. For numerical accuracy, all floating-point time values are converted to integer values internally by scaling by the precision factor. The larger the number given here, the smaller the delta of time that can be differentiated; the limit is the maximum integer that can be represented in the system.

timeline
void CMetaInterval::timeline(ostream &out) const;

Description: Outputs a list of all events in the order in which they occur.

clearToInitial
void CInterval::clear_to_initial(void);

Description: Pauses the interval, if it is playing, and resets its state to its initial state, abandoning any state changes already in progress in the middle of the interval. Calling this is like pausing the interval and discarding it, creating a new one in its place.

finish
void CInterval::finish(void);

Description: Stops the interval from playing and sets it to its final state.

getAutoFinish
bool CInterval::get_auto_finish(void) const;

Description: Returns the state of the 'auto_finish' flag. See set_auto_finish().

getAutoPause
bool CInterval::get_auto_pause(void) const;

Description: Returns the state of the 'auto_pause' flag. See set_auto_pause().

getClassType
static TypeHandle CInterval::get_class_type(void);

Undocumented function.

getDoneEvent
string const &CInterval::get_done_event(void) const;

Description: Returns the event that is generated whenever the interval reaches its final state, whether it is explicitly finished or whether it gets there on its own.

getDuration
double CInterval::get_duration(void) const;

Description: Returns the duration of the interval in seconds.

getManager
CIntervalManager *CInterval::get_manager(void) const;

Description: Returns the CIntervalManager object which will be responsible for playing this interval. Note that this can only return a C++ object; if the particular CIntervalManager object has been extended in the scripting language, this will return the encapsulated C++ object, not the full extended object.

getName
string const &CInterval::get_name(void) const;

Description: Returns the interval's name.

getOpenEnded
bool CInterval::get_open_ended(void) const;

Description: Returns the state of the "open_ended" flag. This is primarily intended for instantaneous intervals like FunctionIntervals; it indicates true if the interval has some lasting effect that should be applied even if the interval doesn't get started until after its finish time, or false if the interval is a transitive thing that doesn't need to be called late.

getPlayRate
double CInterval::get_play_rate(void) const;

Description: Returns the play rate as set by the last call to start(), loop(), or set_play_rate().

getState
CInterval::State CInterval::get_state(void) const;

Description: Indicates the state the interval believes it is in: whether it has been started, is currently in the middle, or has been finalized.

getT
double CInterval::get_t(void) const;

Description: Returns the current time of the interval: the last value of t passed to priv_initialize(), priv_step(), or priv_finalize().

getWantsTCallback
bool CInterval::get_wants_t_callback(void) const;

Description: Returns the state of the 'wants_t_callback' flag. See set_wants_t_callback().

isPlaying
bool CInterval::is_playing(void) const;

Description: Returns true if the interval is currently playing, false otherwise.

isStopped
bool CInterval::is_stopped(void) const;

Description: Returns true if the interval is in either its initial or final states (but not in a running or paused state).

loop
void CInterval::loop(double start_t = (0), double end_t = (-1), double play_rate = (1));

Description: Starts the interval playing by registering it with the current CIntervalManager. The interval will play until it is interrupted with finish() or pause(), looping back to start_t when it reaches end_t.
If end_t is less than zero, it indicates the end of the interval.

output
virtual void CInterval::output(ostream &out) const;

Description:

pause
double CInterval::pause(void);

Description: Stops the interval from playing but leaves it in its current state. It may later be resumed from this point by calling resume().

privDoEvent
void CInterval::priv_do_event(double t, CInterval::EventType event);

These functions control the actual playback of the interval. Don't call them directly; they're intended to be called from a supervising object, e.g. the Python start() .. finish() interface. These cannot be declared private because they must be accessible to Python, but the method names are prefixed with priv_ to remind you that you probably don't want to be using them directly.
Description: Calls the appropriate event function indicated by the EventType.

privFinalize
virtual void CInterval::priv_finalize(void);

Description: This is called to stop an interval, forcing it to whatever state it would be after it played all the way through. It's generally invoked by set_final_t().

privInitialize
virtual void CInterval::priv_initialize(double t);

These functions control the actual playback of the interval. Don't call them directly; they're intended to be called from a supervising object, e.g. the Python start() .. finish() interface. These cannot be declared private because they must be accessible to Python, but the method names are prefixed with priv_ to remind you that you probably don't want to be using them directly.
Description: This replaces the first call to priv_step(), and indicates that the interval has just begun. This may be overridden by derived classes that need to do some explicit initialization on the first call.

privInstant
virtual void CInterval::priv_instant(void);

Description: This is called in lieu of priv_initialize() .. priv_step() .. priv_finalize(), when everything is to happen within one frame. The interval should initialize itself, then leave itself in the final state.

privInterrupt
virtual void CInterval::priv_interrupt(void);

Description: This is called while the interval is playing to indicate that it is about to be interrupted; that is, priv_step() will not be called for a length of time. But the interval should remain in its current state in anticipation of being eventually restarted when the calls to priv_step() eventually resume.
The purpose of this function is to allow self-running intervals like sound intervals to stop the actual sound playback during the pause.

privReverseFinalize
virtual void CInterval::priv_reverse_finalize(void);

Description: Called generally following a priv_reverse_initialize(), this indicates the interval should set itself to the initial state.

privReverseInitialize
virtual void CInterval::priv_reverse_initialize(double t);

Description: Similar to priv_initialize(), but this is called when the interval is being played backwards; it indicates that the interval should start at the finishing state and undo any intervening intervals.

privReverseInstant
virtual void CInterval::priv_reverse_instant(void);

Description: This is called in lieu of priv_reverse_initialize() .. priv_step() .. priv_reverse_finalize(), when everything is to happen within one frame. The interval should initialize itself, then leave itself in the initial state.

privStep
virtual void CInterval::priv_step(double t);

Description: Advances the time on the interval. The time may either increase (the normal case) or decrease (e.g. if the interval is being played by a slider).

resume
void CInterval::resume(void);

Description: Restarts the interval from its current point after a previous call to pause().
Description: Restarts the interval from the indicated point after a previous call to pause().

resumeUntil
void CInterval::resume_until(double end_t);

Description: Restarts the interval from the current point after a previous call to pause() (or a previous play-to-point-and-stop), to play until the indicated point and then stop.

setAutoFinish
void CInterval::set_auto_finish(bool auto_finish);

Description: Changes the state of the 'auto_finish' flag. If this is true, the interval may be arbitrarily finished when the system needs to reset due to some external event by calling CIntervalManager::interrupt(). If this is false (the default), the interval must always be explicitly finished or paused.

setAutoPause
void CInterval::set_auto_pause(bool auto_pause);

Description: Changes the state of the 'auto_pause' flag. If this is true, the interval may be arbitrarily interrupted when the system needs to reset due to some external event by calling CIntervalManager::interrupt(). If this is false (the default), the interval must always be explicitly finished or paused.

setDoneEvent
void CInterval::set_done_event(string const &event);

Description: Sets the event that is generated whenever the interval reaches its final state, whether it is explicitly finished or whether it gets there on its own.

setManager
void CInterval::set_manager(CIntervalManager *manager);

Description: Indicates the CIntervalManager object which will be responsible for playing this interval. This defaults to the global CIntervalManager; you should need to change this only if you have special requirements for playing this interval.

setPlayRate
void CInterval::set_play_rate(double play_rate);

Description: Changes the play rate of the interval. If the interval is already started, this changes its speed on-the-fly. Note that since play_rate is a parameter to start() and loop(), the next call to start() or loop() will reset this parameter.

setT
void CInterval::set_t(double t);

Description: Explicitly sets the time within the interval. Normally, you would use start() .. finish() to let the time play normally, but this may be used to set the time to some particular value.

setupPlay
void CInterval::setup_play(double start_time, double end_time, double play_rate, bool do_loop);

Description: Called to prepare the interval for automatic timed playback, e.g. via a Python task. The interval will be played from start_t to end_t, at a time factor specified by play_rate. start_t must always be less than end_t (except for the exception for end_t == -1, below), but if play_rate is negative the interval will be played backwards.
Specify end_t of -1 to play the entire interval from start_t.
Call step_play() repeatedly to execute the interval.

setupResume
void CInterval::setup_resume(void);

Description: Called to prepare the interval for restarting at the current point within the interval after an interruption.

setupResumeUntil
void CInterval::setup_resume_until(double end_t);

Description: Called to prepare the interval for restarting from the current point after a previous call to pause() (or a previous play-to-point-and-stop), to play until the indicated point and then stop.

setWantsTCallback
void CInterval::set_wants_t_callback(bool wants_t_callback);

Description: Changes the state of the 'wants_t_callback' flag. If this is true, the interval will be returned by CIntervalManager::get_event() each time the interval's time value has been changed, regardless of whether it has any external events.

start
void CInterval::start(double start_t = (0), double end_t = (-1), double play_rate = (1));

Description: Starts the interval playing by registering it with the current CIntervalManager. The interval will play to the end and stop.
If end_t is less than zero, it indicates the end of the interval.

stepPlay
bool CInterval::step_play(void);

Description: Should be called once per frame to execute the automatic timed playback begun with setup_play().
Returns true if the interval should continue, false if it is done and should stop.

write
virtual void CInterval::write(ostream &out, int indent_level) const;

Description:

getClassType
static TypeHandle TypedReferenceCount::get_class_type(void);

Undocumented function.

getClassType
static TypeHandle TypedObject::get_class_type(void);

Undocumented function.

getType
virtual TypeHandle TypedObject::get_type(void) const = 0;

Derived classes should override this function to return get_class_type().

getTypeIndex
int TypedObject::get_type_index(void) const;

Description: Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. This is equivalent to get_type().get_index().

isExactType
bool TypedObject::is_exact_type(TypeHandle handle) const;

Description: Returns true if the current object is the indicated type exactly.

isOfType
bool TypedObject::is_of_type(TypeHandle handle) const;

Description: Returns true if the current object is or derives from the indicated type.

getClassType
static TypeHandle ReferenceCount::get_class_type(void);

Undocumented function.

getRefCount
int ReferenceCount::get_ref_count(void) const;

Description: Returns the current reference count.

ref
void ReferenceCount::ref(void) const;

Description: Explicitly increments the reference count. User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically.
This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.

testRefCountIntegrity
bool ReferenceCount::test_ref_count_integrity(void) const;

Description: Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise.

testRefCountNonzero
bool ReferenceCount::test_ref_count_nonzero(void) const;

Description: Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise.

unref
bool ReferenceCount::unref(void) const;

Description: Explicitly decrements the reference count. Note that the object will not be implicitly deleted by unref() simply because the reference count drops to zero. (Having a member function delete itself is problematic; plus, we don't have a virtual destructor anyway.) However, see the helper function unref_delete().
User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically.
This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.
The return value is true if the new reference count is nonzero, false if it is zero.