# LMatrix4d¶

from panda3d.core import LMatrix4d

class LMatrix4d

This is a 4-by-4 transform matrix.

Inheritance diagram

class CRow
__getitem__(i: int)float
__init__(param0: CRow)
static size()int

Returns 4: the number of columns of a LMatrix4.

class Row

These helper classes are used to support two-level operator [].

__getitem__(i: int, assign_val: float)None
__getitem__(i: int)float
__init__(param0: Row)
static size()int

Returns 4: the number of columns of a LMatrix4.

__call__(row: int, col: int)None
__call__(row: int, col: int)float
__div__(scalar: float)LMatrix4d
__eq__(other: LMatrix4d)bool
__getitem__(i: int)Row
__getitem__(i: int)CRow
__iadd__(other: LMatrix4d)LMatrix4d

Performs a memberwise addition between two matrices.

__idiv__(scalar: float)LMatrix4d
__imul__(other: LMatrix4d)LMatrix4d
__imul__(scalar: float)LMatrix4d
__init__()
__init__(upper3: LMatrix3d)

Construct a 4x4 matrix given a 3x3 rotation matrix and an optional translation component.

__init__(upper3: LMatrix3d, trans: LVecBase3d)
__init__(other: LMatrix4d)
__init__(param0: LVecBase4d, param1: LVecBase4d, param2: LVecBase4d, param3: LVecBase4d)

Constructs the matrix from four individual rows.

__init__(other: UnalignedLMatrix4d)
__init__(param0: float, param1: float, param2: float, param3: float, param4: float, param5: float, param6: float, param7: float, param8: float, param9: float, param10: float, param11: float, param12: float, param13: float, param14: float, param15: float)
__isub__(other: LMatrix4d)LMatrix4d

Performs a memberwise addition between two matrices.

__lt__(other: LMatrix4d)bool
__mul__(other: LMatrix4d)LMatrix4d
__mul__(scalar: float)LMatrix4d
__ne__(other: LMatrix4d)bool
__reduce__()object
__repr__()str
accumulate(other: LMatrix4d, weight: float)None

Computes (*this) += other * weight.

addHash(hash: int)int

Adds the vector into the running hash.

addHash(hash: int, threshold: float)int

Adds the vector into the running hash.

almostEqual(other: LMatrix4d)bool

Returns true if two matrices are memberwise equal within a default tolerance based on the numeric type.

almostEqual(other: LMatrix4d, threshold: float)bool

Returns true if two matrices are memberwise equal within a specified tolerance. This is faster than the equivalence operator as this doesn’t have to guarantee that it is transitive.

assign(other: LMatrix4d)LMatrix4d
assign(other: UnalignedLMatrix4d)LMatrix4d
assign(fill_value: float)LMatrix4d
begin()None

Returns an iterator that may be used to traverse the elements of the matrix, STL-style.

begin()None

Returns an iterator that may be used to traverse the elements of the matrix, STL-style.

property cols → Sequence[LVecBase4d]

Retrieves the indicated column of the matrix as a 4-component vector.

compareTo(other: LMatrix4d)int

This flavor of compareTo() uses a default threshold value based on the numeric type.

compareTo(other: LMatrix4d, threshold: float)int

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).

componentwiseMult(other: LMatrix4d)None
static convertMat(from: CoordinateSystem, to: CoordinateSystem)LMatrix4d

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

end()None

Returns an iterator that may be used to traverse the elements of the matrix, STL-style.

end()None

Returns an iterator that may be used to traverse the elements of the matrix, STL-style.

fill(fill_value: float)None

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

generateHash(hashgen: ChecksumHashGenerator)None

Adds the vector to the indicated hash generator.

generateHash(hashgen: ChecksumHashGenerator, scale: float)None

Adds the vector to the indicated hash generator.

getCell(row: int, col: int)float

Returns a particular element of the matrix.

static getClassType()TypeHandle
getCol(col: int)LVecBase4d

Retrieves the indicated column of the matrix as a 4-component vector.

getCol3(col: int)LVecBase3d

Retrieves the indicated column of the matrix as a 3-component vector, ignoring the last row.

getCols()list
getData()None

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()int

Returns a suitable hash for phash_map.

getHash(threshold: float)int

Returns a suitable hash for phash_map.

getNumComponents()int

Returns the number of elements in the matrix, 16.

getRow(result_vec: LVecBase4d, row: int)None

Stores the indicated row of the matrix as a 4-component vector.

getRow(row: int)LVecBase4d

Retrieves the indicated row of the matrix as a 4-component vector.

getRow3(result_vec: LVecBase3d, row: int)None

Stores the row column of the matrix as a 3-component vector, ignoring the last column.

getRow3(row: int)LVecBase3d

Retrieves the row column of the matrix as a 3-component vector, ignoring the last column.

getRow3s()list
getRows()list
getUpper3()LMatrix3d

Retrieves the upper 3x3 submatrix.

static identMat()LMatrix4d

Returns an identity matrix.

This function definition must appear first, since some inline functions below take advantage of it.

invertAffineFrom(other: LMatrix4d)bool

bugbug: we could optimize this for rotationscaletranslation matrices (transpose upper 3x3 and take negative of translation component)

invertFrom(other: LMatrix4d)bool

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 invertInPlace().

The return value is true if the matrix was successfully inverted, false if the was a singularity.

invertInPlace()bool

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

isIdentity()bool

Returns true if this is (close enough to) the identity matrix, false otherwise.

isNan()bool

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

multiply(other1: LMatrix4d, other2: LMatrix4d)None

this = other1 * other2

static onesMat()LMatrix4d

Returns an matrix filled with ones.

operatorNew(size: int)None
output(out: ostream)None
readDatagram(source: DatagramIterator)None

Reads the matrix from the Datagram using get_stdfloat().

readDatagramFixed(scan: DatagramIterator)None

Reads the matrix from the Datagram using get_float32() or get_float64(). See writeDatagramFixed().

static rotateMat(angle: float, axis: LVecBase3d, cs: CoordinateSystem)LMatrix4d

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

static rotateMatNormaxis(angle: float, axis: LVecBase3d, cs: CoordinateSystem)LMatrix4d

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

property rows → Sequence[LVecBase4d]

these versions inline better

Retrieves the indicated row of the matrix as a 4-component vector.

Stores the indicated row of the matrix as a 4-component vector.

static scaleMat(scale: LVecBase3d)LMatrix4d

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

static scaleMat(scale: float)LMatrix4d

Returns a matrix that applies the indicated uniform scale.

static scaleMat(sx: float, sy: float, sz: float)LMatrix4d

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

static scaleShearMat(scale: LVecBase3d, shear: LVecBase3d, cs: CoordinateSystem)LMatrix4d

Returns a matrix that applies the indicated scale and shear.

static scaleShearMat(sx: float, sy: float, sz: float, shxy: float, shxz: float, shyz: float, cs: CoordinateSystem)LMatrix4d

Returns a matrix that applies the indicated scale and shear.

set(e00: float, e01: float, e02: float, e03: float, e10: float, e11: float, e12: float, e13: float, e20: float, e21: float, e22: float, e23: float, e30: float, e31: float, e32: float, e33: float)None
setCell(row: int, col: int, value: float)None

Changes a particular element of the matrix.

setCol(col: int, v: LVecBase3d)None

Replaces the indicated column of the matrix with the indicated 3-component vector, ignoring the last row.

setCol(col: int, v: LVecBase4d)None

Replaces the indicated column of the matrix.

setRotateMat(angle: float, axis: LVecBase3d, cs: CoordinateSystem)None

Sets mat to a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector.

setRotateMatNormaxis(angle: float, axis: LVecBase3d, cs: CoordinateSystem)None

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

setRow(row: int, v: LVecBase3d)None

Replaces the indicated row of the matrix with the indicated 3-component vector, ignoring the last column.

setRow(row: int, v: LVecBase4d)None

Replaces the indicated row of the matrix.

setScaleMat(scale: LVecBase3d)None

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

setScaleShearMat(scale: LVecBase3d, shear: LVecBase3d, cs: CoordinateSystem)None

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

setShearMat(shear: LVecBase3d, cs: CoordinateSystem)None

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

setTranslateMat(trans: LVecBase3d)None

Fills mat with a matrix that applies the indicated translation.

setUpper3(upper3: LMatrix3d)None

Get and set the upper 3x3 rotation matrix.

static shearMat(shear: LVecBase3d, cs: CoordinateSystem)LMatrix4d

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

static shearMat(shxy: float, shxz: float, shyz: float, cs: CoordinateSystem)LMatrix4d

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

static size()int

Returns 4: the number of rows of a LMatrix4.

static translateMat(trans: LVecBase3d)LMatrix4d

Returns a matrix that applies the indicated translation.

static translateMat(tx: float, ty: float, tz: float)LMatrix4d

Returns a matrix that applies the indicated translation.

transposeFrom(other: LMatrix4d)None
transposeInPlace()None
write(out: ostream, indent_level: int)None
writeDatagram(destination: Datagram)None

Writes the matrix to the Datagram using add_stdfloat(). This is appropriate when you want to write the matrix using the standard width setting, especially when you are writing a bam file.

writeDatagramFixed(destination: Datagram)None

Writes the matrix to the Datagram using add_float32() or add_float64(), depending on the type of floats in the matrix, regardless of the setting of Datagram.setStdfloatDouble(). This is appropriate when you want to write a fixed-width value to the datagram, especially when you are not writing a bam file.

xform(v: LVecBase4d)LVecBase4d

4-component vector or point times matrix. This is a fully general operation.

xformInPlace(v: LVecBase4d)None

4-component vector or point times matrix. This is a fully general operation.

xformPoint(v: LVecBase3d)LVecBase3d

The matrix transforms a 3-component point (including translation component) and returns the result. This assumes the matrix is an affine transform.

xformPointGeneral(v: LVecBase3d)LVecBase3d

The matrix transforms a 3-component point (including translation component) and returns the result, as a fully general operation.

xformPointGeneralInPlace(v: LVecBase3d)None

The matrix transforms a 3-component point (including translation component), as a fully general operation.

xformPointInPlace(v: LVecBase3d)None

The matrix transforms a 3-component point (including translation component). This assumes the matrix is an affine transform.

xformVec(v: LVecBase3d)LVecBase3d

The matrix transforms a 3-component vector (without translation component) and returns the result. This assumes the matrix is an orthonormal transform.

xformVecGeneral(v: LVecBase3d)LVecBase3d

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

xformVecGeneralInPlace(v: LVecBase3d)None

The matrix transforms a 3-component vector (without translation component), as a fully general operation.

xformVecInPlace(v: LVecBase3d)None

The matrix transforms a 3-component vector (without translation component). This assumes the matrix is an orthonormal transform.

static yToZUpMat()LMatrix4d

Returns a matrix that transforms from the Y-up coordinate system to the Z-up coordinate system.

static zToYUpMat()LMatrix4d

Returns a matrix that transforms from the Y-up coordinate system to the Z-up coordinate system.

static zerosMat()LMatrix4d

Returns an matrix filled with zeros.