# UserVertexTransform

from pandac.PandaModules import UserVertexTransform

Class : UserVertexTransform
Description : This is a specialization on VertexTransform that allows the user to specify any arbitrary transform matrix he likes. This is rarely used except for testing.

## Inheritance:

UserVertexTransform: VertexTransform
VertexTransform: TypedWritableReferenceCount
TypedWritableReferenceCount: TypedWritable ReferenceCount
TypedWritable: TypedObject
TypedObject: MemoryBase
MemoryBase:
ReferenceCount: MemoryBase

## Methods of UserVertexTransform:

UserVertexTransform (Constructor)
getClassType
getName
setMatrix

## Methods of VertexTransform:

accumulateMatrix
getClassType
getGlobalModified
getMatrix
getModified
getNextModified
multMatrix
output
write

## 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

UserVertexTransform UserVertexTransform::UserVertexTransform(string const &name); Description:

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

getName string const &UserVertexTransform::get_name(void) const; Description: Returns the name passed to the constructor. Completely arbitrary.

setMatrix void UserVertexTransform::set_matrix(LMatrix4f const &matrix); Description: Stores the indicated matrix.

accumulateMatrix virtual void VertexTransform::accumulate_matrix(LMatrix4f &accum, float weight) const; Description: Adds the value of this transform's matrix, modified by the indicated weight, into the indicated accumulation matrix. This is used to compute the result of several blended transforms.

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

getGlobalModified static UpdateSeq VertexTransform::get_global_modified(Thread *current_thread); Description: Returns the currently highest VertexTransform::get_modified() value in the world. This can be used as a quick way to determine if any VertexTransforms have changed value recently.

getMatrix virtual void VertexTransform::get_matrix(LMatrix4f &matrix) const = 0; Undocumented function.

getModified UpdateSeq VertexTransform::get_modified(Thread *current_thread) const; Description: Returns a sequence number that's guaranteed to change at least every time the value reported by get_matrix() changes.

getNextModified static UpdateSeq VertexTransform::get_next_modified(Thread *current_thread); Description: Returns a monotonically increasing sequence. Each time this is called, a new sequence number is returned, higher than the previous value. This is used to ensure that all VertexTransform::get_modified() calls return an increasing number in the same space, so that TransformBlend::get_modified() is easy to determine. It is similar to Geom::get_modified(), but it is in a different space.

multMatrix virtual void VertexTransform::mult_matrix(LMatrix4f &result, LMatrix4f const &previous) const; Description: Premultiplies this transform's matrix with the indicated previous matrix, so that the result is the net composition of the given transform with this transform. The result is stored in the parameter "result", which should not be the same matrix as previous.

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

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

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.