# TransformBlendTable

from pandac.PandaModules import TransformBlendTable

Class : TransformBlendTable
Description : This structure collects together the different combinations of transforms and blend amounts used by a GeomVertexData, to facilitate computing dynamic vertices on the CPU at runtime. Each vertex has a pointer to exactly one of the entries in this table, and each entry defines a number of transform/blend combinations.
This structure is used for a GeomVertexData set up to compute its dynamic vertices on the CPU. See TransformTable for one set up to compute its dynamic vertices on the graphics card.

## Inheritance:

TransformBlendTable: CopyOnWriteObject
CopyOnWriteObject: CachedTypedWritableReferenceCount
CachedTypedWritableReferenceCount: TypedWritableReferenceCount
TypedWritableReferenceCount: TypedWritable ReferenceCount
TypedWritable: TypedObject
TypedObject: MemoryBase
MemoryBase:
ReferenceCount: MemoryBase

## Methods of TransformBlendTable:

TransformBlendTable (Constructor)
addBlend
getBlend
getClassType
getMaxSimultaneousTransforms
getModified
getNumBlends
getNumTransforms
getRows
modifyRows
operator =
removeBlend
setBlend
setRows
write

## Methods of CopyOnWriteObject:

getClassType

## Methods of CachedTypedWritableReferenceCount:

cacheRef
cacheUnref
getCacheRefCount
getClassType
testRefCountIntegrity

## 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

TransformBlendTable TransformBlendTable::TransformBlendTable(void); Description:

addBlend int TransformBlendTable::add_blend(TransformBlend const &blend); Description: Adds a new blend to the table, and returns its index number. If there is already an identical blend in the table, simply returns that number instead.

getBlend TransformBlend const &TransformBlendTable::get_blend(int n) const; Description: Returns the nth blend in the table.

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

getMaxSimultaneousTransforms int TransformBlendTable::get_max_simultaneous_transforms(void) const; Description: Returns the maximum number of unique VertexTransform objects that are applied to any one vertex simultaneously. This is the same limit reflected by GraphicsStateGuardian::get_max_vertex_transforms().

getModified UpdateSeq TransformBlendTable::get_modified(Thread *current_thread) const; Description: Returns a counter which is guaranteed to increment at least when any TransformBlends within the table have changed.

getNumBlends int TransformBlendTable::get_num_blends(void) const; Description: Returns the total number of different blend combinations in the table.

getNumTransforms int TransformBlendTable::get_num_transforms(void) const; Description: Returns the number of unique VertexTransform objects represented in the table. This will correspond to the size of the TransformTable object that would represent the same table. This is also the same limit reflected by GraphicsStateGuardian::get_max_vertex_transform_indices().

getRows SparseArray const &TransformBlendTable::get_rows(void) const; Description: Returns the subset of rows (vertices) in the associated GeomVertexData that this TransformBlendTable actually affects.

modifyRows SparseArray &TransformBlendTable::modify_rows(void); Description: Returns a modifiable reference to the SparseArray that specifies the subset of rows (vertices) in the associated GeomVertexData that this TransformBlendTable actually affects.

operator = void TransformBlendTable::operator =(TransformBlendTable const &copy); Description:

removeBlend void TransformBlendTable::remove_blend(int n); Description: Removes the blend at the nth position.

setBlend void TransformBlendTable::set_blend(int n, TransformBlend const &blend); Description: Replaces the blend at the nth position with the indicated value.

setRows void TransformBlendTable::set_rows(SparseArray const &rows); Description: Specifies the subset of rows (vertices) in the associated GeomVertexData that this TransformBlendTable actually affects.

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

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

cacheRef void CachedTypedWritableReferenceCount::cache_ref(void) const; Description: Explicitly increments the cache reference count and the normal reference count simultaneously.

cacheUnref bool CachedTypedWritableReferenceCount::cache_unref(void) const; Description: Explicitly decrements the cache reference count and the normal reference count simultaneously. The return value is true if the new reference count is nonzero, false if it is zero.

getCacheRefCount int CachedTypedWritableReferenceCount::get_cache_ref_count(void) const; Description: Returns the current reference count.

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

testRefCountIntegrity bool CachedTypedWritableReferenceCount::test_ref_count_integrity(void) const; Description: Does some easy checks to make sure that the reference count isn't completely bogus.

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.