LA
Matrix multiplication
Installation
LA has no dependencies but requires some ES6 support.
➜ npm install @chris-young/la
➜ bower install la.js
Basic Usage
const f_Matrix = LA.Matrix(Float64Array);
const f_Matrix4d = f_Matrix(4);
let m_camera = f_Matrix4d(LA.IDENTITY);
let r = Math.PI / 4;
let c = Math.cos(r);
let s = Math.sin(r);
let m_rotate = f_Matrix4d([
[1, 0, 0, 0],
[0, c, -s, 0],
[0, s, c, 0],
[0, 0, 0, 1]
]);
let z = 1.5;
let m_zoom = f_Matrix4d([
[z, 0, 0, 0],
[0, z, 0, 0],
[0, 0, z, 0],
[0, 0, 0, 1]
]);
m_camera = LA.multiply(m_camera, m_rotate, m_zoom);
Documentation
Properties
la.TYPES Array
[Array, Int8Array, Uint8Array, Uint8ClampedArray, Int16Array, Uint16Array, Int32Array, Uint32Array, Float32Array, Float64Array]
LA can use Arrays, or TypedArrays. If you use a regular array your matricies should be compatible with other libraries like mathjs.
la.IDENTITY Symbol
Pass this in to la.Matrix to get the identity instead of all zeros.
Methods
la.Vector(type)(dimensions)(values)
Returns a vector
Parameters
- type: Function
- dimensions: Integer
- values: (optional) Array
la.scale(vector, scalar)
Returns a scaled vector
Parameters
- vector: Array
- scalar: Number
la.add(...vectors)
Returns the sum of two or more vectors
Parameters
- ...vectors: Arrays
la.Matrix(type)(dimensions)(values)
Returns a matrix
Parameters
- type: Function
- dimensions: Integer
- values: (optional) Array | Symbol
Array la.transform(vector, matrix)
Returns a vector transformed by a matrix
Parameters
- vector: Array
- matrix: Array
Array la.multiply(...matricies)
Returns the product of two or more matricies
Parameters
- ...matricies: Arrays