Function getZeroMatrix

docs/app/js/sanddance-app.js:71230–71246

()

let ZERO_MATRIX3;
let IDENTITY_MATRIX3;
function getZeroMatrix() {
    if (!ZERO_MATRIX3) {
        ZERO_MATRIX3 = new Matrix3([
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0
        ]);
        Object.freeze(ZERO_MATRIX3);
    }
    return ZERO_MATRIX3;
}
function getIdentityMatrix() {
    if (!IDENTITY_MATRIX3) {
        IDENTITY_MATRIX3 = new Matrix3();