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CConstrainPosInterval Class Reference

A constraint interval that will constrain the position of one node to the position of another. More...

Inheritance diagram for CConstrainPosInterval:
CConstraintInterval CInterval TypedReferenceCount TypedObject ReferenceCount MemoryBase MemoryBase

Public Member Functions

 __init__ (str name, double duration, const NodePath node, const NodePath target, bool wrt, const LVecBase3 posOffset)
 Constructs a constraint interval that will constrain the position of one node to the position of another. More...
 
const NodePath getNode ()
 Returns the "source" node. More...
 
const NodePath getTarget ()
 Returns the "target" node. More...
 
- Public Member Functions inherited from CInterval
 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)
 
- Public Member Functions inherited from TypedObject
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...
 
- Public Member Functions inherited from ReferenceCount
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 ()
 
- Static Public Member Functions inherited from CConstraintInterval
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from CInterval
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedReferenceCount
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedObject
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from ReferenceCount
static TypeHandle getClassType ()
 

Additional Inherited Members

- Public Types inherited from CInterval
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 Attributes inherited from CConstraintInterval
bool bogus_variable
 

Detailed Description

A constraint interval that will constrain the position of one node to the position of another.

Member Function Documentation

◆ __init__()

__init__ ( str  name,
double  duration,
const NodePath  node,
const NodePath  target,
bool  wrt,
const LVecBase3  posOffset 
)

Constructs a constraint interval that will constrain the position of one node to the position of another.

If wrt is true, the node's position will be transformed into the target node's parent's space before being copied. If wrt is false, the target node's local position will be copied unaltered.

◆ getClassType()

static TypeHandle getClassType ( )
static

◆ getNode()

const NodePath getNode ( )

Returns the "source" node.

◆ getTarget()

const NodePath getTarget ( )

Returns the "target" node.