# AuxSceneData

from pandac.PandaModules import AuxSceneData

Class : AuxSceneData
Description : This is a base class for a generic data structure that can be attached per-instance to the camera, to store per-instance data that must be preserved over multiple frames.
In particular, this is used to implement the FadeLODNode, which must remember during traversal at what point it is in the fade, separately for each instance and for each camera.

## Inheritance:

AuxSceneData: TypedReferenceCount
TypedReferenceCount: TypedObject ReferenceCount
TypedObject:
ReferenceCount:

## Methods of AuxSceneData:

getClassType
getDuration
getExpirationTime
getLastRenderTime
output
setDuration
setLastRenderTime
write

## Methods of TypedReferenceCount:

getClassType

## Methods of TypedObject:

getClassType
getType
getTypeIndex
isExactType
isOfType

## Methods of ReferenceCount:

getClassType
getRefCount
ref
testRefCountIntegrity
testRefCountNonzero
unref

getClassType static TypeHandle AuxSceneData::get_class_type(void); Undocumented function.

getDuration double AuxSceneData::get_duration(void) const; Description: Returns the minimum length in time, in seconds, to keep this AuxSceneData object around in the scene graph after the last time it was rendered.

getExpirationTime double AuxSceneData::get_expiration_time(void) const; Description: Returns the frame_time at which this AuxSceneData object is currently scheduled to be removed from the scene graph.

getLastRenderTime double AuxSceneData::get_last_render_time(void) const; Description: Returns the last time this object was used during traversal (according to set_last_render_time()).

output virtual void AuxSceneData::output(ostream &out) const; Description:

setDuration void AuxSceneData::set_duration(double duration); Description: Specifies the minimum length in time, in seconds, to keep this AuxSceneData object around in the scene graph after the last time it was rendered.

setLastRenderTime void AuxSceneData::set_last_render_time(double render_time); Description: Should be called with the current frame_time each time the AuxSceneData is used during traversal.

write virtual void AuxSceneData::write(ostream &out, int indent_level = (0)) 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.