public static void testPositiveXYZLookAt() {
Vector3d dir = new Vector3d();
Matrix4x3d m = new Matrix4x3d().lookAt(0, 0, 0, -1, 0, 0, 0, 1, 0);
m.positiveX(dir);
TestUtil.assertVector3dEquals(new Vector3d(0, 0, -1).normalize(), dir, 1E-7f);
m.positiveY(dir);
TestUtil.assertVector3dEquals(new Vector3d(0, 1, 0).normalize(), dir, 1E-7f);
m.positiveZ(dir);
TestUtil.assertVector3dEquals(new Vector3d(1, 0, 0).normalize(), dir, 1E-7f);
}
public static void testPositiveXYZSameAsInvert() {
Vector3d dir = new Vector3d();
Vector3d dir2 = new Vector3d();
Matrix4x3d m = new Matrix4x3d().rotateXYZ(0.12f, 1.25f, -2.56f);
Matrix4x3d inv = new Matrix4x3d(m).invert();
m.positiveX(dir);
inv.transformDirection(dir2.set(1, 0, 0));
TestUtil.assertVector3dEquals(dir2, dir, 1E-6f);
m.positiveY(dir);
inv.transformDirection(dir2.set(0, 1, 0));
TestUtil.assertVector3dEquals(dir2, dir, 1E-6f);
m.positiveZ(dir);
inv.transformDirection(dir2.set(0, 0, 1));
TestUtil.assertVector3dEquals(dir2, dir, 1E-6f);
}
public static void testPositiveZRotateX() {
Vector3d dir = new Vector3d();
Matrix4x3d m = new Matrix4x3d().rotateX((float) Math.toRadians(90));
m.positiveZ(dir);
TestUtil.assertVector3dEquals(new Vector3d(0, 1, 0), dir, 1E-7f);
}