LMatrix3d

Inheritance:

Methods of LMatrix3d:

addHash
unsigned int LMatrix3d::add_hash(unsigned int hash) const;

Description: Adds the vector into the running hash.

almostEqual
bool LMatrix3d::almost_equal(LMatrix3d const &other, double threshold) const;

We don't have a scale_mat() that takes a single uniform scale parameter, because it would be ambiguous whether we mean a 2-d or a 3-d scale.
Description: Returns true if two matrices are memberwise equal within a default tolerance based on the numeric type.
Description: Returns true if two matrices are memberwise equal within a specified tolerance.

compareTo
int LMatrix3d::compare_to(LMatrix3d const &other) const;

Description: This flavor of compare_to uses a default threshold value based on the numeric type.
Description: Sorts matrices lexicographically, componentwise. Returns a number less than 0 if this matrix sorts before the other one, greater than zero if it sorts after, 0 if they are equivalent (within the indicated tolerance).

convertMat
static LMatrix3d const &LMatrix3d::convert_mat(CoordinateSystem from, CoordinateSystem to);

Description: Returns a matrix that transforms from the indicated coordinate system to the indicated coordinate system.

determinant
double LMatrix3d::determinant(void) const;

Description: Returns the determinant of the matrix.

fill
void LMatrix3d::fill(double fill_value);

Description: Sets each element of the matrix to the indicated fill_value. This is of questionable value, but is sometimes useful when initializing to zero.

getCell
double LMatrix3d::get_cell(int row, int col) const;

Description: Returns a particular element of the matrix.

getClassType
static TypeHandle LMatrix3d::get_class_type(void);

Undocumented function.

getCol
LVecBase3d LMatrix3d::get_col(int col) const;

Description: Returns the indicated column of the matrix as a three-component vector.

getCol2
LVecBase2d LMatrix3d::get_col2(int col) const;

Description: Returns the indicated column of the matrix as a two-component vector, ignoring the last row.

getData
double const *LMatrix3d::get_data(void) const;

Description: Returns the address of the first of the nine data elements in the matrix. The remaining elements occupy the next eight positions in row-major order.

getHash
unsigned int LMatrix3d::get_hash(void) const;

Description: Returns a suitable hash for phash_map.

getNumComponents
int LMatrix3d::get_num_components(void) const;

Description: Returns the number of elements in the matrix, nine.

getRow
LVecBase3d LMatrix3d::get_row(int row) const;

these versions inline better
Description: Returns the indicated row of the matrix as a three-component vector.

getRow2
LVecBase2d LMatrix3d::get_row2(int row) const;

Description: Returns the indicated row of the matrix as a two-component vector, ignoring the last column.

identMat
static LMatrix3d const &LMatrix3d::ident_mat(void);

Filename: lmatrix3_src.I Created by: drose (29Jan99)
PANDA 3D SOFTWARE Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
All use of this software is subject to the terms of the Panda 3d Software license. You should have received a copy of this license along with this source code; you will also find a current copy of the license at http://etc.cmu.edu/panda3d/docs/license/ .
To contact the maintainers of this program write to panda3d-general@lists.sourceforge.net .
Description: Returns an identity matrix.
This function definition must appear first, since some inline functions below take advantage of it.

invertFrom
bool LMatrix3d::invert_from(LMatrix3d const &other);

Description: Computes the inverse of the other matrix, and stores the result in this matrix. This is a fully general operation and makes no assumptions about the type of transform represented by the matrix.
The other matrix must be a different object than this matrix. However, if you need to invert a matrix in place, see invert_in_place.
The return value is true if the matrix was successfully inverted, false if the was a singularity.

invertInPlace
bool LMatrix3d::invert_in_place(void);

Description: Inverts the current matrix. Returns true if the inverse is successful, false if the matrix was singular.

invertTransposeFrom
bool LMatrix3d::invert_transpose_from(LMatrix3d const &other);

Description: Simultaneously computes the inverse of the indicated matrix, and then the transpose of that inverse.

isNan
bool LMatrix3d::is_nan(void) const;

Description: Returns true if any component of the matrix is not-a-number, false otherwise.

multiply
void LMatrix3d::multiply(LMatrix3d const &other1, LMatrix3d const &other2);

this = other1 * other2

operator !=
bool LMatrix3d::operator !=(LMatrix3d const &other) const;

Description:

operator ()
double &LMatrix3d::operator ()(int row, int col);

Description:

operator *
LMatrix3d LMatrix3d::operator *(LMatrix3d const &other) const;

Description:

operator *=
LMatrix3d &LMatrix3d::operator *=(LMatrix3d const &other);

Description:
Description: Performs a memberwise scale.

operator +=
LMatrix3d &LMatrix3d::operator +=(LMatrix3d const &other);

Description: Performs a memberwise addition between two matrices.

operator -=
LMatrix3d &LMatrix3d::operator -=(LMatrix3d const &other);

Description: Performs a memberwise subtraction between two matrices.

operator /
LMatrix3d LMatrix3d::operator /(double scalar) const;

Description:

operator /=
LMatrix3d &LMatrix3d::operator /=(double scalar);

Description: Performs a memberwise scale.

operator <
bool LMatrix3d::operator <(LMatrix3d const &other) const;

Description: This performs a lexicographical comparison. It's of questionable mathematical meaning, but sometimes has a practical purpose for sorting unique vectors, especially in an STL container. Also see compare_to().

operator =
LMatrix3d &LMatrix3d::operator =(LMatrix3d const &other);

Description:

operator ==
bool LMatrix3d::operator ==(LMatrix3d const &other) const;

Description:

operator delete
void LMatrix3d::operator delete(void *ptr);

Undocumented function.

operator new
void *LMatrix3d::operator new(unsigned int size);

Undocumented function.

output
void LMatrix3d::output(ostream &out) const;

Description:

pythonRepr
void LMatrix3d::python_repr(ostream &out, string const &class_name) const;

Description:

rotateMat
static LMatrix3d LMatrix3d::rotate_mat(double angle);

Description: Returns a matrix that rotates by the given angle in degrees counterclockwise.
Description: Returns a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector.

rotateMatNormaxis
static LMatrix3d LMatrix3d::rotate_mat_normaxis(double angle, LVecBase3d const &axis, CoordinateSystem cs = (CS_default));

Description: Returns a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector. Assumes axis has been normalized.

scaleMat
static LMatrix3d LMatrix3d::scale_mat(LVecBase2d const &scale);

Description: Returns a matrix that applies the indicated scale in each of the two axes.
Description: Returns a matrix that applies the indicated scale in each of the three axes.

scaleShearMat
static LMatrix3d LMatrix3d::scale_shear_mat(LVecBase3d const &scale, LVecBase3d const &shear, CoordinateSystem cs = (CS_default));

Description: Returns a matrix that applies the indicated scale and shear.

set
void LMatrix3d::set(double e00, double e01, double e02, double e10, double e11, double e12, double e20, double e21, double e22);

Description:

setCell
void LMatrix3d::set_cell(int row, int col, double value);

Description: Changes a particular element of the matrix.

setCol
void LMatrix3d::set_col(int col, LVecBase3d const &v);

Description: Replaces the indicated column of the matrix from a three-component vector.
Description: Replaces the indicated column of the matrix from a two-component vector, ignoring the last row.

setRotateMat
void LMatrix3d::set_rotate_mat(double angle);

The following named constructors return 3x3 matrices suitable for scale/rotate transforms in 3-d coordinate space.
Description: Fills mat with a matrix that rotates by the given angle in degrees counterclockwise.
Description: Fills mat with a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector.

setRotateMatNormaxis
void LMatrix3d::set_rotate_mat_normaxis(double angle, LVecBase3d const &axis, CoordinateSystem cs = (CS_default));

Description: Fills mat with a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector. Assumes axis has been normalized.

setRow
void LMatrix3d::set_row(int row, LVecBase3d const &v);

Description: Replaces the indicated row of the matrix from a three-component vector.
Description: Replaces the indicated row of the matrix from a two-component vector, ignoring the last column.

setScaleMat
void LMatrix3d::set_scale_mat(LVecBase2d const &scale);

Description: Fills mat with a matrix that applies the indicated scale in each of the two axes.
Description: Fills mat with a matrix that applies the indicated scale in each of the three axes.

setScaleShearMat
void LMatrix3d::set_scale_shear_mat(LVecBase3d const &scale, LVecBase3d const &shear, CoordinateSystem cs = (CS_default));

Description: Fills mat with a matrix that applies the indicated scale and shear.

setShearMat
void LMatrix3d::set_shear_mat(LVecBase3d const &shear, CoordinateSystem cs = (CS_default));

Description: Fills mat with a matrix that applies the indicated shear in each of the three planes.

setTranslateMat
void LMatrix3d::set_translate_mat(LVecBase2d const &trans);

Description: Fills mat with a matrix that applies the indicated translation.

shearMat
static LMatrix3d LMatrix3d::shear_mat(LVecBase3d const &shear, CoordinateSystem cs = (CS_default));

Description: Returns a matrix that applies the indicated shear in each of the three planes.

translateMat
static LMatrix3d LMatrix3d::translate_mat(LVecBase2d const &trans);

Description: Returns a matrix that applies the indicated translation.

transposeFrom
void LMatrix3d::transpose_from(LMatrix3d const &other);

Description:

transposeInPlace
void LMatrix3d::transpose_in_place(void);

Description:

validatePtr
static bool LMatrix3d::validate_ptr(void const *ptr);

Undocumented function.

write
void LMatrix3d::write(ostream &out, int indent_level = (0)) const;

Description:

xform
LVecBase3d LMatrix3d::xform(LVecBase3d const &v) const;

Description: 3-component vector or point times matrix.

xformPoint
LVecBase2d LMatrix3d::xform_point(LVecBase2d const &v) const;

Description: The matrix transforms a 2-component point (including translation component) and returns the result. This assumes the matrix is an affine transform.

xformVec
LVecBase2d LMatrix3d::xform_vec(LVecBase2d const &v) const;

Description: The matrix transforms a 2-component vector (without translation component) and returns the result. This assumes the matrix is an affine transform.
Description: The matrix transforms a 3-component vector and returns the result. This assumes the matrix is an orthonormal transform.
In practice, this is the same computation as xform().

xformVecGeneral
LVecBase3d LMatrix3d::xform_vec_general(LVecBase3d const &v) const;

Description: The matrix transforms a 3-component vector (without translation component) and returns the result, as a fully general operation.