Panda3D
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This interval contains a list of nested intervals, each of which has its own begin and end times. Some of them may overlap and some of them may not. More...
Public Types | |
enum | DefType { DT_c_interval = 0, DT_ext_index = 1, DT_push_level = 2, DT_pop_level = 3 } |
enum | RelativeStart { RS_previous_end = 0, RS_previous_begin = 1, RS_level_begin = 2 } |
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enum | EventType { ET_initialize = 0, ET_instant = 1, ET_step = 2, ET_finalize = 3, ET_reverse_initialize = 4, ET_reverse_instant = 5, ET_reverse_finalize = 6, ET_interrupt = 7 } |
enum | State { S_initial = 0, S_started = 1, S_paused = 2, S_final = 3 } |
Public Member Functions | |
__init__ (str name) | |
int | addCInterval (CInterval c_interval, double rel_time, CMetaInterval::RelativeStart rel_to) |
Adds a new CInterval to the list. The interval will be played when the indicated time (relative to the given point) has been reached. More... | |
int | addExtIndex (int ext_index, str name, double duration, bool open_ended, double rel_time, CMetaInterval::RelativeStart rel_to) |
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). More... | |
clearIntervals () | |
Resets the list of intervals and prepares for receiving a new list. More... | |
CInterval | getCInterval (int n) |
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. More... | |
CMetaInterval::DefType | getDefType (int n) |
Returns the type of the nth interval definition that has been added. More... | |
int | getEventIndex () |
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. More... | |
double | getEventT () |
If a previous call to is_event_ready() returned true, this returns the t value that should be fed to the given interval. More... | |
CInterval::EventType | getEventType () |
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. More... | |
int | getExtIndex (int n) |
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. More... | |
double | getIntervalEndTime (str name) |
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. More... | |
double | getIntervalStartTime (str name) |
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. More... | |
int | getNumDefs () |
Returns the number of interval and push/pop definitions that have been added to the meta interval. More... | |
double | getPrecision () |
Returns the precision with which time measurements are compared. See set_precision(). More... | |
bool | isEventReady () |
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. More... | |
popEvent () | |
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. More... | |
int | popLevel (double duration) |
Finishes a level marked by a previous call to push_level(), and returns to the previous level. More... | |
int | pushLevel (str name, double rel_time, CMetaInterval::RelativeStart rel_to) |
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. More... | |
bool | setIntervalStartTime (str name, double rel_time, CMetaInterval::RelativeStart rel_to) |
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. More... | |
setPrecision (double precision) | |
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. More... | |
timeline (Ostream out) | |
Outputs a list of all events in the order in which they occur. More... | |
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clearToInitial () | |
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. More... | |
finish () | |
Stops the interval from playing and sets it to its final state. More... | |
bool | getAutoFinish () |
Returns the state of the 'auto_finish' flag. See set_auto_finish(). More... | |
bool | getAutoPause () |
Returns the state of the 'auto_pause' flag. See set_auto_pause(). More... | |
str | getDoneEvent () |
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. More... | |
double | getDuration () |
Returns the duration of the interval in seconds. More... | |
CIntervalManager | getManager () |
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. More... | |
str | getName () |
Returns the interval's name. More... | |
bool | getOpenEnded () |
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. More... | |
double | getPlayRate () |
Returns the play rate as set by the last call to start(), loop(), or set_play_rate(). More... | |
CInterval::State | getState () |
Indicates the state the interval believes it is in: whether it has been started, is currently in the middle, or has been finalized. More... | |
double | getT () |
Returns the current time of the interval: the last value of t passed to priv_initialize(), priv_step(), or priv_finalize(). More... | |
bool | getWantsTCallback () |
Returns the state of the 'wants_t_callback' flag. See set_wants_t_callback(). More... | |
bool | isPlaying () |
Returns true if the interval is currently playing, false otherwise. More... | |
bool | isStopped () |
Returns true if the interval is in either its initial or final states (but not in a running or paused state). More... | |
loop (double start_t, double end_t, double play_rate) | |
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. More... | |
output (Ostream out) | |
double | pause () |
Stops the interval from playing but leaves it in its current state. It may later be resumed from this point by calling resume(). More... | |
privDoEvent (double t, CInterval::EventType event) | |
Calls the appropriate event function indicated by the EventType. More... | |
privFinalize () | |
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(). More... | |
privInitialize (double t) | |
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. More... | |
privInstant () | |
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. More... | |
privInterrupt () | |
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. More... | |
privReverseFinalize () | |
Called generally following a priv_reverse_initialize(), this indicates the interval should set itself to the initial state. More... | |
privReverseInitialize (double t) | |
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. More... | |
privReverseInstant () | |
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. More... | |
privStep (double t) | |
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). More... | |
resume () | |
Restarts the interval from its current point after a previous call to pause(). More... | |
resume (double start_t) | |
Restarts the interval from the indicated point after a previous call to pause(). More... | |
resumeUntil (double end_t) | |
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. More... | |
setAutoFinish (bool auto_finish) | |
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. More... | |
setAutoPause (bool auto_pause) | |
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. More... | |
setDoneEvent (str event) | |
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. More... | |
setManager (CIntervalManager manager) | |
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. More... | |
setPlayRate (double play_rate) | |
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. More... | |
setT (double t) | |
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. More... | |
setupPlay (double start_time, double end_time, double play_rate, bool do_loop) | |
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. More... | |
setupResume () | |
Called to prepare the interval for restarting at the current point within the interval after an interruption. More... | |
setupResumeUntil (double end_t) | |
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. More... | |
setWantsTCallback (bool wants_t_callback) | |
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. More... | |
start (double start_t, double end_t, double play_rate) | |
Starts the interval playing by registering it with the current CIntervalManager. The interval will play to the end and stop. More... | |
bool | stepPlay () |
Should be called once per frame to execute the automatic timed playback begun with setup_play(). More... | |
write (Ostream out, int indent_level) | |
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TypeHandle | getType () |
Derived classes should override this function to return get_class_type(). More... | |
int | getTypeIndex () |
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(). More... | |
bool | isExactType (TypeHandle handle) |
Returns true if the current object is the indicated type exactly. More... | |
bool | isOfType (TypeHandle handle) |
Returns true if the current object is or derives from the indicated type. More... | |
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int | getRefCount () |
Returns the current reference count. More... | |
ref () | |
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. More... | |
bool | testRefCountIntegrity () |
Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise. More... | |
bool | testRefCountNonzero () |
Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise. More... | |
bool | unref () |
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.) However, see the helper function unref_delete(). More... | |
Static Public Member Functions | |
static TypeHandle | getClassType () |
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static TypeHandle | getClassType () |
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static TypeHandle | getClassType () |
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static TypeHandle | getClassType () |
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static TypeHandle | getClassType () |
This interval contains a list of nested intervals, each of which has its own begin and end times. Some of them may overlap and some of them may not.
enum DefType |
enum RelativeStart |
__init__ | ( | str | name | ) |
int addCInterval | ( | CInterval | c_interval, |
double | rel_time, | ||
CMetaInterval::RelativeStart | rel_to | ||
) |
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.
int addExtIndex | ( | int | ext_index, |
str | name, | ||
double | duration, | ||
bool | open_ended, | ||
double | rel_time, | ||
CMetaInterval::RelativeStart | rel_to | ||
) |
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 | ( | ) |
Resets the list of intervals and prepares for receiving a new list.
CInterval getCInterval | ( | int | n | ) |
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.
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static |
CMetaInterval::DefType getDefType | ( | int | n | ) |
Returns the type of the nth interval definition that has been added.
int getEventIndex | ( | ) |
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.
double getEventT | ( | ) |
If a previous call to is_event_ready() returned true, this returns the t value that should be fed to the given interval.
CInterval::EventType getEventType | ( | ) |
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.
int getExtIndex | ( | int | n | ) |
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.
double getIntervalEndTime | ( | str | name | ) |
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.
double getIntervalStartTime | ( | str | name | ) |
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.
int getNumDefs | ( | ) |
Returns the number of interval and push/pop definitions that have been added to the meta interval.
double getPrecision | ( | ) |
Returns the precision with which time measurements are compared. See set_precision().
bool isEventReady | ( | ) |
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 | ( | ) |
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.
int popLevel | ( | double | duration | ) |
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.
int pushLevel | ( | str | name, |
double | rel_time, | ||
CMetaInterval::RelativeStart | rel_to | ||
) |
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.
bool setIntervalStartTime | ( | str | name, |
double | rel_time, | ||
CMetaInterval::RelativeStart | rel_to | ||
) |
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 | ( | double | precision | ) |
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 | ( | Ostream | out | ) |
Outputs a list of all events in the order in which they occur.