The user has a magic cube with an invisible 3D object in it. The user can
control a laser plane by moving it along any of the axes. The places where the
plane cuts the invisible object become visible. I.e. the user can view only the
intersection between the plane and the object. The user can also rotate the
whole magic cube together with the invisible object in it and examine it from
various point of views. The goal is to guess the type of the invisible object
by inspecting its intersection with the laser plane. The system has 16
different objects (cubes, spheres, cone, cylinders, pyramids, to name just few
of them) shown at various orientations. There are more than 90 problems grouped
in 5 problem sets: "easy", "moderate", "hard", "random" and "conic". The last
set is special set with only cones, cone duos and cylinders. The application
keeps track of users, the solved problems by each user and the time used by
users for solving the problems.
Inspect the intersections of simple objects (cubes and
Inspect the intersections of objects similar to the simple
objects (cylinders, cones, pyramid).
Inspect the intersections of truncated objects.
Inspect the conical intersections.
Guess the 3D object by examining its intersection.
Find objects which have similar (or same) intersections in one
orientation of the cutting plane, and different intersections in another.
Build a list of intersection features and determine what
objects' intersections have them.
Examine the effect of object orientation over the shape of the
Having the 3D object displayed try to predict its
Build your own problems with the predefined set of objects.
Slider is a DALEST application. To see the
others go to the DALEST page.