WebGL-Math

Matrix (column-major)

idendity

Return the identity matrix : Matrix

Parameter	Type	Description
number	Number	size of matrix

Examples

const myMatrix = GLMath.Matrix.idendity( 3 );

//myMatrix : [1, 0, 0,
//            0, 1, 0,
//            0, 0, 1]

determinant

Return the determinant of the matrix : Number

Parameter	Type	Description
matrix	Matrix	Matrix to calculating determinant

Examples

const myMatrix = GLMath.Matrix.idendity( 3 );
const determinant = GLMath.Matrix.determinant( myMatrix ); // 1

transpose

Return the transpose of the matrix : Matrix

Parameter	Type	Description
matrix	Matrix	Matrix to transpose

Examples

const myMatrix = new Float32Array([1, 2,
                                   3, 4]);
const transposeMatrix = GLMath.Matrix.transpose( myMatrix );

//transposeMatrix : [1, 3,
//                   2, 4]

negative

Return the negative of the matrix : Matrix

Parameter	Type	Description
matrix	Matrix	Matrix to negative

Examples

const myMatrix = new Float32Array([4, -2,
                                   1, -3]);
const negativeMatrix = GLMath.Matrix.negative( myMatrix );

//negativeMatrix : [-4, 2,
//                  -1, 3]

multiplyScalar

Return the product of the matrix and the scalar : Matrix

Parameter	Type	Description
matrix	Matrix	Matrix to multiply
number	Number	Factor

Examples

const myMatrix = new Float32Array([3, 4,
                                   5, 1]);
const resultMatrix = GLMath.Matrix.multiplyScalar( myMatrix , 3 );

//resultMatrix : [9, 12,
//                15, 3]

multiplyVector

Return the product of the matrix and the vector : Vector

Parameter	Type	Description
matrix	Matrix	Matrix to multiply
vector	Vector	Vector

Examples

const myMatrix = new Float32Array([3, 4,
                                   5, 1]);
const resultVector = GLMath.Matrix.multiplyVector( myMatrix , new Float32Array([2, 3]) );

//resultVector : [21, 11]

add

Return the sum of two matrices: Matrix

Parameter	Type	Description
matrixA	Matrix	First Matrix to add
matrixB	Matrix	Second Matrix to add

Examples

const matrixA = new Float32Array([1, 5,
                                  1, 3]);
const matrixB = new Float32Array([2, 3,
                                  4, 1]);
const resultMatrix = GLMath.Matrix.add( matrixA , matrixB );

//resultMatrix : [3, 8,
//                5, 4]

subtract

Return the difference of two matrices: Matrix

Parameter	Type	Description
matrixA	Matrix	Minuend Matrix
matrixB	Matrix	Subtrahend Matrix

Examples

const matrixA = new Float32Array([1, 5,
                                  1, 3]);
const matrixB = new Float32Array([2, 3,
                                  4, 1]);
const resultMatrix = GLMath.Matrix.subtract( matrixA , matrixB );

//resultMatrix : [-1, 2,
//                -3, 2]

multiplyCompWise

Return the component wise multiplication of two matrices: Matrix

Parameter	Type	Description
matrixA	Matrix	First Matrix to multiply
matrixB	Matrix	Second Matrix to multiply

Examples

const matrixA = new Float32Array([1, 5,
                                  1, 3]);
const matrixB = new Float32Array([2, 3,
                                  4, 1]);
const resultMatrix = GLMath.Matrix.multiplyCompWise( matrixA , matrixB );

//resultMatrix : [2, 15,
//                4, 3 ]

multiply

Return the product of two matrices: Matrix

Parameter	Type	Description
matrixA	Matrix	Left operand
matrixB	Matrix	Right operand

Examples

const matrixA = new Float32Array([1, 5,
                                  1, 3]);
const matrixB = new Float32Array([2, 3,
                                  4, 1]);
const resultMatrix = GLMath.Matrix.multiply( matrixA , matrixB );

//resultMatrix : [5, 19,
//                5, 23]

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