Matrix3.invert()

The Matrix3.invert() method in the Three.js library is used to compute the inverse of a 3x3 matrix.

Syntax

.matrix3.invert()

Parameters

This method does not take any parameters.

Return Value

The Matrix3.invert() method returns the inverse of the matrix as a new Matrix3 object.

Description

The Matrix3.invert() method calculates the inverse of a 3x3 matrix. If the matrix is not invertible, then the method will return a null object. The method uses the Gauss-Jordan elimination algorithm to compute the inverse of the matrix.

Example

// create a 3x3 matrix
const matrix = new THREE.Matrix3().set(
    1, 2, 3,
    4, 5, 6,
    7, 8, 9
);

// invert the matrix
const inverseMatrix = matrix.invert();

// output the inverse matrix
console.log(inverseMatrix);

Remarks

• The Matrix3.invert() method does not change the original matrix.

• The method can be used to compute the inverse of a matrix for operations such as transformations, rotations or scaling.

• Three.js also provides a Matrix4.invert() method that can be used to compute the inverse of a 4x4 matrix.

• The Matrix3.invert() method can be used to solve a system of linear equations represented by a 3x3 matrix.