js-2dmath/test/test-matrix22.js

Fast 2d geometry math: Vector2, Rectangle, Circle, Matrix2x3 (2D transformation), Circle, BoundingBox, Line2, Segment2, Intersections, Distances, Transitions (animation/tween), Random numbers, Noise

var tap = require("tap"),
    test = tap.test,
    Matrix22 = require("../index.js").Matrix22;

//setup

test("Mat22 test 01", function(t) {

    var mat22 = Matrix22.fromNumbers(-1, 2, 4, -6);
    var vec2 = [-12,20];
    var out_vec2 = [0, 0];
    Matrix22.solve(out_vec2, mat22, vec2);

    t.equals(out_vec2[0], 4);
    t.equals(out_vec2[1], -2);

    t.end();
});