ar m1 = goog.vec.Mat3.createFloat32();
    goog.vec.Mat3.makeRotate(m1, -Math.PI / 4, 0, 0, 1);
    goog.vec.Mat3.multMat(m0, m1, m1);
    var v1 = [0.7071068, 0.7071068, 0, -0.7071068, 0.7071068, 0, 0, 0, 1];
    assertElementsRoughlyEqual(m1, v1, goog.vec.EPSILON);
  }

  function testMakeRotateX() {
    var m0 = goog.vec.Mat3.createFloat32();
    var m1 = goog.vec.Mat3.createFloat32()

    goog.vec.Mat3.makeRotateX(m0, Math.PI / 7);
    goog.vec.Mat3.makeRotate(m1, Math.PI / 7, 1, 0, 0);
    assertElemen