# TransformTable¶

class TransformTable

Stores the total set of VertexTransforms that the vertices in a particular GeomVertexData object might depend on.

This structure is used for a GeomVertexData set up to compute its dynamic vertices on the graphics card. See TransformBlendTable for one set up to compute its dynamic vertices on the CPU.

Inheritance diagram

TransformTable(void)
TransformTable(TransformTable const &copy)
std::size_t add_transform(VertexTransform const *transform)

Adds a new transform to the table and returns the index number of the new transform. Only valid for unregistered tables.

This does not automatically uniquify the pointer; if the transform is already present in the table, it will be added twice.

static TypeHandle get_class_type(void)
UpdateSeq get_modified(Thread *current_thread = Thread::get_current_thread()) const

Returns a sequence number that’s guaranteed to change at least when any VertexTransforms in the table change. (However, this is only true for a registered table. An unregistered table may or may not reflect an update here when a VertexTransform changes.)

std::size_t get_num_transforms(void) const

Returns the number of transforms in the table.

VertexTransform const *get_transform(std::size_t n) const

Returns the nth transform in the table.

void insert_transform(std::size_t n, VertexTransform const *transform)

Inserts a new transform to the table at the given index position. If the index is beyond the end of the table, appends it to the end. Only valid for unregistered tables.

This does not automatically uniquify the pointer; if the transform is already present in the table, it will be added twice.

bool is_registered(void) const

Returns true if this table has been registered. Once it has been registered, the set of transforms in a TransformTable may not be further modified; but it must be registered before it can be assigned to a Geom.

ConstPointerTo<TransformTable> register_table(TransformTable const *table)

Registers a TransformTable for use. This is similar to GeomVertexFormat::register_format(). Once registered, a TransformTable may no longer be modified (although the individual VertexTransform objects may modify their reported transforms).

This must be called before a table may be used in a Geom. After this call, you should discard the original pointer you passed in (which may or may not now be invalid) and let its reference count decrement normally; you should use only the returned value from this point on.

void remove_transform(std::size_t n)

Removes the nth transform. Only valid for unregistered tables.

void set_transform(std::size_t n, VertexTransform const *transform)

Replaces the nth transform. Only valid for unregistered tables.

void write(std::ostream &out) const