Home' Position : Position Feb Mar 2016 Contents The glasses work by alternately
blocking one eye then the other so rapidly
that it cannot be detected by the human
eye. The 3D projectors transmit two
alternating images in synchronisation
with the glasses - each one showing
the view that would be obtained by the
matching eye in the virtual world. If
performed correctly, this provides the
realistic 3D experience.
To create a true 3D experience,
tracking domes map exactly where the
user's head and eyes are oriented within
the virtual world. As the user's head
moves, the viewpoint in the virtual world
changes to suit. In order for the scene
to remain realistic, the data projected
onto the world must be updated in
real time. If this is done smoothly and
accurately then the user immediately
feels the power of virtual reality. If it is
implemented poorly, the user can feel
disorientated or even nauseous.
The Holoverse is unique in that it
works directly with point clouds without
any modelling required. In fact it is a
paradox in that the standard industry
requires point clouds to be modelled and
transformed into polygons and vectors
in order to display them. The Holoverse
not only displays points directly, but it
does the complete opposite and converts
any traditional CAD models from
textured polygons into points before
displaying them. Additionally, scanning
software Solidscan can be used to merge
photographs and point clouds to create
photo-realistic 3D models.
The virtual world
In the virtual world, we don't just see
different things; we see things differently.
MNG describes this as having 'Superman-
like powers' -- the ability to fly through the
cloud, walk through walls, view features
from all angles, hover above points of
interest and zoom in to inspect any
feature in more detail.
This is not just video game level of
immersion. Just as in the real world
where we navigate by walking around,
so too can users of the Holoverse.
Using feet and eyes, users can navigate
towards points of interest and engage
with objects in what---naturally for
humans---is a very intuitive interface for
interacting with data.
Nor is the Holoverse just an impressive
copy of reality. Without the restrictions
that the laws of physics limit us to,
users can fly, teleport, time travel, move
through walls and change scale. By
pointing the controller and pushing a
button users take off into the air like
Superman might do. Speed is controlled
by the user and either a new flight path
chosen or a point of landing selected. The
Holoverse also allows scaled movement,
so that one small step in the Holoverse
can allow three steps in the virtual world.
And unlike the real world, users
are not limited to space and time. By
simply loading another model users are
transported to a new location. Or by
examining different scans of the same site,
users travel through time and experience
changes to environments. By engaging
with new designs, users can also travel into
the future, or, if there are many designs to
examine, to numerous possible futures.
Finally, not only can you just see the
models, you can acquire new knowledge
from them. In the virtual world you
can use the equivalent of a laser
pointer to relate two points, extracting
measurements and coordinates of any
elements you choose.
What's the use?
As a survey company heavily involved
in laser scanning, MNG have discovered
the usefulness of this tool for many
applications, including the management
of field surveys.
"If you are in the business of collecting
point cloud data there is no better tool for
appreciating the quality of the data you
are collecting than by immersing yourself
in the data set," said John Nolan.
"When traversing through your data in
the Holoverse these varying point densities
are clearly seen and any laminations, poles
not aligning or holes in the data become
apparent very quickly. The Holoverse is
an excellent tool to visually inspect the
accuracy, density and general quality of
any point cloud data," he said.
On the client side, the most obvious
application for the Holoverse is in
visualisation and planning. MNG's first
commercial application for the Holoverse
was for a proposed development at the
coastal suburb of Sorrento in Perth,
Western Australia. The developers of the
site were interested in building a multi-
story building along the coast and were
Example of line work being superimposed
on the point cloud for validation.
Taking a measurement in the Holoverse.
"The Holoverse is unique in that it works directly
with point clouds without any modelling required."
Links Archive Position Dec Jan 2016 Position Apl May 2016 Navigation Previous Page Next Page