Matrix3.determinant()

The Matrix3.determinant() method is used to calculate the determinant of a 3x3 matrix object in Three.js. The determinant of a matrix is a scalar value that can be used to determine various properties of the matrix, such as whether it is singular or invertible.

Syntax

matrix.determinant()

Parameters

This method does not take any parameters.

Return Value

The Matrix3.determinant() method returns a scalar value representing the determinant of the matrix.

Examples

let matrix = new THREE.Matrix3().set(
    1, 2, 3,
    4, 5, 6,
    7, 8, 9
);

console.log(matrix.determinant()); // Outputs: 0

In this example, we create a new Matrix3 object and set its values to a 3x3 matrix with increasing values. We then call the determinant() method on the matrix and log the result to the console. Since the determinant of this matrix is 0, we expect the output to be 0.

Notes

The determinant of a matrix can be used to determine various properties of the matrix, such as whether it is invertible or singular. If the determinant is 0, the matrix is singular and cannot be inverted. If the determinant is anything other than 0, the matrix is invertible and can be inverted using techniques such as Gaussian elimination.

See Also

• Matrix3.invert() - method to invert a Matrix3 object
• Matrix4.determinant() - method to determine the determinant of a 4x4 matrix object