This corresponds to an <Xfm$Anim_S$> entry, which is a collection of up to nine <S$Anim> entries that specify the nine components of a transformation. It’s implemented as a group that can contain any number of
explicit EggXfmSAnim(std::string const &name = "", CoordinateSystem cs = ::CS_default)
EggXfmSAnim(EggXfmSAnim const ©)
Converts the older-style XfmAnim table to the newer-style XfmSAnim table.
void add_component_data(std::string const &component_name, double value)
void add_component_data(int component, double value)
Adds a new row to the named component (one of matrix_component_letters) of the table.
Adds a new row to the indicated component (0-12) of the table.
bool add_data(LMatrix4d const &mat)
Adds a new matrix to the table, by adding a new row to each of the subtables.
This is a convenience function that treats the table of tables as if it were a single table of matrices. It is an error to call this if any SAnimData children of this node have an improper name (e.g. not a single letter, or not one of “ijkabchprxyz”).
This function has the further requirement that all nine of the subtables must exist and be of the same length. Furthermore, the order string must be the standard order string, which matches the system
Thus, you probably cannot take an existing
EggXfmSAnimobject and start adding matrices to the end; you must clear out the original data first. (As a special exception, if no tables exist, they will be created.) The method
normalize()will do this for you on an existing
This function may fail silently if the matrix cannot be decomposed into scale, shear, rotate, and translate. In this case, the closest approximation is added to the table, and false is returned.
Removes all data from the table. It does this by removing all of its children.
static void compose_with_order(LMatrix4d &mat, LVecBase3d const &scale, LVecBase3d const &shear, LVecBase3d const &hpr, LVecBase3d const &trans, std::string const &order, CoordinateSystem cs)
Composes a matrix out of the nine individual components, respecting the order string. The components will be applied in the order indicated by the string.
CoordinateSystem get_coordinate_system(void) const
Returns the coordinate system this table believes it is defined within. This should always match the coordinate system of the
EggDatastructure that owns it. It is necessary to store it here because the meaning of the h, p, and r columns depends on the coordinate system.
int get_num_rows(void) const
Returns the effective number of rows in the table. This is actually the number of rows of the smallest subtable larger than one row. This is a convenience function that treats the table of tables as if it were a single table of matrices.
std::string const &get_order(void) const
std::string const &get_standard_order(void)
void get_value(int row, LMatrix4d &mat) const
Returns the value of the aggregate row of the table as a matrix. This is a convenience function that treats the table of tables as if it were a single table of matrices. It is an error to call this if any SAnimData children of this node have an improper name (e.g. not a single letter, or not one of “ijkabchprxyz”).
bool has_fps(void) const
bool has_order(void) const
The inverse operation of
optimize(), this ensures that all the sub-tables have the same length by duplicating rows as necessary. This is needed before doing operations like
set_value()on an existing table.
Optimizes the table by collapsing redundant sub-tables.
Optimizes the table by collapsing redundant sub-tables, and simultaneously ensures that the order string is the standard order (which is the same as that supported by
void set_fps(double fps)
void set_order(std::string const &order)
bool set_value(int row, LMatrix4d const &mat)
Replaces the indicated row of the table with the given matrix.
The return value is true if the matrix can be decomposed and stored as scale, shear, rotate, and translate, or false otherwise. The data is set in either case.
- explicit EggXfmSAnim(std::string const &name = "", CoordinateSystem cs = ::CS_default)