panda3d.core.LMatrix4f¶
from panda3d.core import LMatrix4f
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class
LMatrix4f¶ This is a 4-by-4 transform matrix.
Inheritance diagram
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__init__() → None¶
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__init__(upper3: LMatrix3f) → None Construct a 4x4 matrix given a 3x3 rotation matrix and an optional translation component.
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__init__(upper3: LMatrix3f, trans: LVecBase3f) → None
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__init__(other: LMatrix4f) → None
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__init__(param0: LVecBase4f, param1: LVecBase4f, param2: LVecBase4f, param3: LVecBase4f) → None Constructs the matrix from four individual rows.
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__init__(other: UnalignedLMatrix4f) → None
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__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) → None
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assign(other: UnalignedLMatrix4f) → LMatrix4f - Return type
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assign(fill_value: float) → LMatrix4f - Return type
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operatorNew(size: size_t) → None¶
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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.
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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¶
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setUpper3(upper3: LMatrix3f) → None¶ Get and set the upper 3x3 rotation matrix.
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static
size() → int¶ Returns 4: the number of rows of a LMatrix4.
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setRow(row: int, v: LVecBase3f) → None¶ Replaces the indicated row of the matrix with the indicated 3-component vector, ignoring the last column.
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setRow(row: int, v: LVecBase4f) → None Replaces the indicated row of the matrix.
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setCol(col: int, v: LVecBase3f) → None¶ Replaces the indicated column of the matrix with the indicated 3-component vector, ignoring the last row.
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setCol(col: int, v: LVecBase4f) → None Replaces the indicated column of the matrix.
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getRow(result_vec: LVecBase4f, row: int) → None¶ Stores the indicated row of the matrix as a 4-component vector.
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getRow(row: int) → LVecBase4f Retrieves the indicated row of the matrix as a 4-component vector.
- Return type
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getCol(col: int) → LVecBase4f¶ Retrieves the indicated column of the matrix as a 4-component vector.
- Return type
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getRow3(result_vec: LVecBase3f, row: int) → None¶ Stores the row column of the matrix as a 3-component vector, ignoring the last column.
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getRow3(row: int) → LVecBase3f Retrieves the row column of the matrix as a 3-component vector, ignoring the last column.
- Return type
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getCol3(col: int) → LVecBase3f¶ Retrieves the indicated column of the matrix as a 3-component vector, ignoring the last row.
- Return type
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isNan() → bool¶ Returns true if any component of the matrix is not-a-number, false otherwise.
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isIdentity() → bool¶ Returns true if this is (close enough to) the identity matrix, false otherwise.
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getCell(row: int, col: int) → float¶ Returns a particular element of the matrix.
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setCell(row: int, col: int, value: float) → None¶ Changes a particular element of the matrix.
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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.
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getNumComponents() → int¶ Returns the number of elements in the matrix, 16.
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begin() → None¶ Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
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begin() → None Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
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end() → None¶ Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
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end() → None Returns an iterator that may be used to traverse the elements of the matrix, STL-style.
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compareTo(other: LMatrix4f) → int¶ This flavor of compare_to uses a default threshold value based on the numeric type.
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compareTo(other: LMatrix4f, 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).
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getHash() → size_t¶ Returns a suitable hash for phash_map.
- Return type
size_t
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getHash(threshold: float) → size_t Returns a suitable hash for phash_map.
- Return type
size_t
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addHash(hash: size_t) → size_t¶ Adds the vector into the running hash.
- Return type
size_t
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addHash(hash: size_t, threshold: float) → size_t Adds the vector into the running hash.
- Return type
size_t
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xform(v: LVecBase4f) → LVecBase4f¶ 4-component vector or point times matrix. This is a fully general operation.
- Return type
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xformPoint(v: LVecBase3f) → LVecBase3f¶ The matrix transforms a 3-component point (including translation component) and returns the result. This assumes the matrix is an affine transform.
- Return type
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xformPointGeneral(v: LVecBase3f) → LVecBase3f¶ The matrix transforms a 3-component point (including translation component) and returns the result, as a fully general operation.
- Return type
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xformVec(v: LVecBase3f) → LVecBase3f¶ The matrix transforms a 3-component vector (without translation component) and returns the result. This assumes the matrix is an orthonormal transform.
- Return type
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xformVecGeneral(v: LVecBase3f) → LVecBase3f¶ The matrix transforms a 3-component vector (without translation component) and returns the result, as a fully general operation.
- Return type
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xformInPlace(v: LVecBase4f) → None¶ 4-component vector or point times matrix. This is a fully general operation.
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xformPointInPlace(v: LVecBase3f) → None¶ The matrix transforms a 3-component point (including translation component). This assumes the matrix is an affine transform.
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xformPointGeneralInPlace(v: LVecBase3f) → None¶ The matrix transforms a 3-component point (including translation component), as a fully general operation.
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xformVecInPlace(v: LVecBase3f) → None¶ The matrix transforms a 3-component vector (without translation component). This assumes the matrix is an orthonormal transform.
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xformVecGeneralInPlace(v: LVecBase3f) → None¶ The matrix transforms a 3-component vector (without translation component), as a fully general operation.
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multiply(other1: LMatrix4f, other2: LMatrix4f) → None¶ this = other1 * other2
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componentwiseMult(other: LMatrix4f) → None¶
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transposeFrom(other: LMatrix4f) → None¶
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transposeInPlace() → None¶
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invertFrom(other: LMatrix4f) → 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 invert_in_place.
The return value is true if the matrix was successfully inverted, false if the was a singularity.
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invertAffineFrom(other: LMatrix4f) → bool¶ bugbug: we could optimize this for rotationscaletranslation matrices (transpose upper 3x3 and take negative of translation component)
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invertInPlace() → bool¶ Inverts the current matrix. Returns true if the inverse is successful, false if the matrix was singular.
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static
identMat() → LMatrix4f¶ Returns an identity matrix.
This function definition must appear first, since some inline functions below take advantage of it.
- Return type
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setTranslateMat(trans: LVecBase3f) → None¶ Fills mat with a matrix that applies the indicated translation.
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setRotateMat(angle: float, axis: LVecBase3f, cs: CoordinateSystem) → None¶ Sets mat to a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector.
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setRotateMatNormaxis(angle: float, axis: LVecBase3f, 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.
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setScaleMat(scale: LVecBase3f) → None¶ Fills mat with a matrix that applies the indicated scale in each of the three axes.
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setShearMat(shear: LVecBase3f, cs: CoordinateSystem) → None¶ Fills mat with a matrix that applies the indicated shear in each of the three planes.
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setScaleShearMat(scale: LVecBase3f, shear: LVecBase3f, cs: CoordinateSystem) → None¶ Fills mat with a matrix that applies the indicated scale and shear.
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static
translateMat(trans: LVecBase3f) → LMatrix4f¶ Returns a matrix that applies the indicated translation.
- Return type
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static
translateMat(tx: float, ty: float, tz: float) → LMatrix4f Returns a matrix that applies the indicated translation.
- Return type
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static
rotateMat(angle: float, axis: LVecBase3f, cs: CoordinateSystem) → LMatrix4f¶ Returns a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector.
- Return type
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static
rotateMatNormaxis(angle: float, axis: LVecBase3f, cs: CoordinateSystem) → LMatrix4f¶ Returns a matrix that rotates by the given angle in degrees counterclockwise about the indicated vector. Assumes axis has been prenormalized.
- Return type
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static
scaleMat(scale: LVecBase3f) → LMatrix4f¶ Returns a matrix that applies the indicated scale in each of the three axes.
- Return type
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static
scaleMat(scale: float) → LMatrix4f Returns a matrix that applies the indicated uniform scale.
- Return type
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static
scaleMat(sx: float, sy: float, sz: float) → LMatrix4f Returns a matrix that applies the indicated scale in each of the three axes.
- Return type
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static
shearMat(shear: LVecBase3f, cs: CoordinateSystem) → LMatrix4f¶ Returns a matrix that applies the indicated shear in each of the three planes.
- Return type
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static
shearMat(shxy: float, shxz: float, shyz: float, cs: CoordinateSystem) → LMatrix4f Returns a matrix that applies the indicated shear in each of the three planes.
- Return type
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static
scaleShearMat(scale: LVecBase3f, shear: LVecBase3f, cs: CoordinateSystem) → LMatrix4f¶ Returns a matrix that applies the indicated scale and shear.
- Return type
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static
scaleShearMat(sx: float, sy: float, sz: float, shxy: float, shxz: float, shyz: float, cs: CoordinateSystem) → LMatrix4f Returns a matrix that applies the indicated scale and shear.
- Return type
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static
yToZUpMat() → LMatrix4f¶ Returns a matrix that transforms from the Y-up coordinate system to the Z-up coordinate system.
- Return type
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static
zToYUpMat() → LMatrix4f¶ Returns a matrix that transforms from the Y-up coordinate system to the Z-up coordinate system.
- Return type
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static
convertMat(from: CoordinateSystem, to: CoordinateSystem) → LMatrix4f¶ Returns a matrix that transforms from the indicated coordinate system to the indicated coordinate system.
- Return type
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almostEqual(other: LMatrix4f) → bool¶ Returns true if two matrices are memberwise equal within a default tolerance based on the numeric type.
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almostEqual(other: LMatrix4f, 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.
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output(out: ostream) → None¶
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write(out: ostream, indent_level: int) → None¶
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generateHash(hashgen: ChecksumHashGenerator) → None¶ Adds the vector to the indicated hash generator.
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generateHash(hashgen: ChecksumHashGenerator, scale: float) → None Adds the vector to the indicated hash generator.
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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.
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readDatagramFixed(scan: DatagramIterator) → None¶ Reads the matrix from the Datagram using get_float32() or get_float64(). See
writeDatagramFixed().
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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.
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readDatagram(source: DatagramIterator) → None¶ Reads the matrix from the Datagram using get_stdfloat().
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static
getClassType() → TypeHandle¶ - Return type
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getRows() → list¶
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getCols() → list¶
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getRow3s() → list¶
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property
rows¶ 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.
- Return type
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property
cols¶ Retrieves the indicated column of the matrix as a 4-component vector.
- Return type
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