Return a new Matrix2. You can pass no parameters (the result will contain all zeros), a float (the result’s diagonal values will contain that float and the rest is all zeros), a sequence of 4 floats, or a sequence of sequences of 2 floats.

>>> hou.Matrix2()
<hou.Matrix2 [[0, 0], [0, 0]]]>

>>> hou.Matrix2(1)
<hou.Matrix2 [[1, 0], [0, 1]]>

>>> hou.Matrix2((0, 1, 2, 3))
<hou.Matrix2 [[0, 1], [2, 3]]>

>>> hou.Matrix2(((0, 1), (3, 4)))
<hou.Matrix2 [[0, 1], [2, 3]]>

Note that Houdini’s matrices are stored in row-major order, so the matrix’s contents are grouped by row.

Returns whether this matrix is equal to another, within a tolerance.

Return the value of the matrix at the given row and column.

Raises IndexError if the row or column are not between 0 and 1, inclusive. Note that negative indices will not index from the end.

Set the value of the matrix at the given row and column.

Raises IndexError if the row or column are not between 0 and 1, inclusive. Note that negative indices will not index from the end.

Return the contents of the matrix as a tuple of 4 floats.

Return the contents of the matrix as a tuple of tuples of 2 floats.

Set this matrix’s contents. The sequence may contain either 4 floats or 2 sequences, each with 2 floats.

See hou.Matrix2.__init__ for examples of suitable parameter values.

Set this matrix to the multiplicative identity, having 1's in the diagonal.

The matrix will contain the values [[1, 0], [0, 1]]. Note that you can construct a new matrix with these values using hou.Matrix2(1).

Set this matrix to contain all zeros.

Note that you can construct a new matrix with all zeros with hou.Matrix2().

Add two matrices by adding corresponding entries together and return a new matrix. This method lets you write m1 + m2, where m1 and m2 are Matrix2 objects.

Subtract another matrix from this one, subtracting corresponding entries, and return a new matrix. This method lets you write m1 - m2, where m1 and m2 are Matrix2 objects.

Multiply this matrix by another matrix or by a scalar, returning a new matrix. This method lets you write m1 * m2, where m1 and m2 are Matrix2 objects, or m1 * s, where s is a float.

See Wikipedia’s matrix multiplication page for details on how each element in the result is computed.

Returns matrix2 * self. Note that __mul__ returns self * matrix2, which is a different result because matrix multiplication is not commutative.

Return the transpose of this matrix. The result is such that self.at(i, j) == self.transposed().at(j, i) for 0 <= i,j <= 1.

See Wikipedia’s transpose page for more information.

Return the inverse of this matrix.

Raises hou.OperationFailed if the matrix is not invertible. Otherwise, (self * self.inverted()).isAlmostEqual(hou.Matrix2(1)) is True.

See Wikipedia’s invertible matrix page for more information.

Return the determinant of the matrix.

See Wikipedia’s determinant page .