# PartGroup

from pandac.PandaModules import PartGroup

Class : PartGroup
Description : This is the base class for PartRoot and MovingPart. It defines a hierarchy of MovingParts.

## Inheritance:

PartGroup: TypedWritableReferenceCount Namable
TypedWritableReferenceCount: TypedWritable ReferenceCount
TypedWritable: TypedObject
TypedObject: MemoryBase
MemoryBase:
ReferenceCount: MemoryBase
Namable:

## Methods of PartGroup:

PartGroup (Constructor)
applyControl
applyFreeze
applyFreezeMatrix
applyFreezeScalar
clearForcedChannel
copySubgraph
findChild
getChild
getClassType
getForcedChannel
getNumChildren
isCharacterJoint
makeCopy
write
writeWithValue

## Methods of TypedWritableReferenceCount:

getClassType

## Methods of TypedWritable:

getClassType

## Methods of TypedObject:

getClassType
getType
getTypeIndex
isExactType
isOfType

## Methods of ReferenceCount:

getClassType
getRefCount
ref
testRefCountIntegrity
testRefCountNonzero
unref

## Methods of Namable:

Namable (Constructor)
clearName
getClassType
getName
hasName
operator =
output
setName

PartGroup PartGroup::PartGroup(PartGroup *parent, string const &name); This is the normal PartGroup constructor. Filename: partGroup.I Created by: drose (22Feb99) PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University. All rights reserved. All use of this software is subject to the terms of the revised BSD license. You should have received a copy of this license along with this source code in a file named "LICENSE." Description: This constructor is only intended for interal use and for derived classes. You should normally use the non-default constructor, below. Description: This constructor is only intended for interal use and for derived classes. You should normally use the make_copy() interface to make copies.. Description: Creates the PartGroup, and adds it to the indicated parent. The only way to delete it subsequently is to delete the entire hierarchy.

applyControl virtual bool PartGroup::apply_control(PandaNode *node); Description: Specifies a node to influence this particular joint so that it will always hold the node's transform. Returns true if this is a joint that can be so controlled, false otherwise. This is normally only called internally by PartBundle::control_joint(), but you may also call it directly.

applyFreeze bool PartGroup::apply_freeze(TransformState const *transform); Description: Freezes this particular joint so that it will always hold the specified transform. Returns true if this is a joint that can be so frozen, false otherwise. This is normally only called internally by PartBundle::freeze_joint(), but you may also call it directly.

applyFreezeMatrix virtual bool PartGroup::apply_freeze_matrix(LVecBase3f const &pos, LVecBase3f const &hpr, LVecBase3f const &scale); Description: Freezes this particular joint so that it will always hold the specified transform. Returns true if this is a joint that can be so frozen, false otherwise. This is normally only called internally by PartBundle::freeze_joint(), but you may also call it directly.

applyFreezeScalar virtual bool PartGroup::apply_freeze_scalar(float value); Description: Freezes this particular joint so that it will always hold the specified transform. Returns true if this is a joint that can be so frozen, false otherwise. This is normally only called internally by PartBundle::freeze_joint(), but you may also call it directly.

clearForcedChannel virtual bool PartGroup::clear_forced_channel(void); Description: Undoes the effect of a previous call to apply_freeze() or apply_control(). Returns true if the joint was modified, false otherwise. This is normally only called internally by PartBundle::release_joint(), but you may also call it directly.

copySubgraph PartGroup *PartGroup::copy_subgraph(void) const; Description: Allocates and returns a new copy of this node and of all of its children.

findChild PartGroup *PartGroup::find_child(string const &name) const; Description: Returns the first descendant found with the indicated name, or NULL if no such descendant exists.

getChild PartGroup *PartGroup::get_child(int n) const; Description: Returns the nth child of the group.

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

getForcedChannel virtual AnimChannelBase *PartGroup::get_forced_channel(void) const; Description: Returns the AnimChannelBase that has been forced to this joint by a previous call to apply_freeze() or apply_control(), or NULL if no such channel has been applied.

getNumChildren int PartGroup::get_num_children(void) const; Description: Returns the number of child nodes of the group.

isCharacterJoint virtual bool PartGroup::is_character_joint(void) const; Description: Returns true if this part is a CharacterJoint, false otherwise. This is a tiny optimization over is_of_type(CharacterType::get_class_type()).

makeCopy virtual PartGroup *PartGroup::make_copy(void) const; Description: Allocates and returns a new copy of the node. Children are not copied, but see copy_subgraph().

write virtual void PartGroup::write(ostream &out, int indent_level) const; Description: Writes a brief description of the group and all of its descendants.

writeWithValue virtual void PartGroup::write_with_value(ostream &out, int indent_level) const; Description: Writes a brief description of the group, showing its current value, and that of all of its descendants.

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

getClassType static TypeHandle TypedWritable::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.

Namable Namable::Namable(string const &initial_name = ("")); Description:

clearName void Namable::clear_name(void); Description: Resets the Namable's name to empty.

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

getName string const &Namable::get_name(void) const; Description:

hasName bool Namable::has_name(void) const; Description: Returns true if the Namable has a nonempty name set, false if the name is empty.

operator = Namable &Namable::operator =(Namable const &other); Description:

output void Namable::output(ostream &out) const; In the absence of any definition to the contrary, outputting a Namable will write out its name. Description: Outputs the Namable. This function simply writes the name to the output stream; most Namable derivatives will probably redefine this.

setName void Namable::set_name(string const &name); Description: