{ class Matrix { constructor (a = 1, b = 0, c = 0, d = 1) { this.matrix = [a, b, c, d]; } getInverse () {//逆数 let [a, b, c, d] = this.matrix, z = a * d - b * c; return z ? new Matrix (d / z, -b / z, -c / z, a /z): null; } multiplication …