Browse Prior Art Database

Collision Boundaries around Navigable View Points

IP.com Disclosure Number: IPCOM000118924D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 256K

Publishing Venue

IBM

Related People

Bardon, D: AUTHOR [+3]

Abstract

Navigation constraints in a Virtual Reality environment are implemented by placing collision boundaries around an otherwise punctual, navigable view point. By adjusting these collision boundaries according to the view point's field of view, the designers can implement cheaply, useful navigation constraints that will prevent users to move their points of view too close to objects and loose sight of the environment's context.

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Collision Boundaries around Navigable View Points

      Navigation constraints in a Virtual Reality environment are
implemented by placing collision boundaries around an otherwise
punctual, navigable view point.  By adjusting these collision
boundaries according to the view point's field of view, the designers
can implement cheaply, useful navigation constraints that will
prevent users to move their points of view too close to objects and
loose sight of the environment's context.

      Collision detection is a feature that is readily available in
most Virtual Reality environments.  This invention proposes to make
use of this powerful facility to implement proximity constraints on
the continuous navigation mode offered to users that browse virtual
environments.

      The virtual camera that users move around the space to navigate
through is actually a punctual object.  As a consequence, it is very
common that users unintentionally bring the virtual camera very close
to objects.  In such a situation, the screen image is filled with an
extreme closeup on the object.  All the user sees is a field of solid
color, almost a blank screen.  Such a rupture in the visual context
causes disorientation and frustration.

      Collision boundaries are usually applied to solid objects in
the environment to ensure that the movable ones do not pass through
the fixed ones.  This invention recommends applying collision
boundaries around the virtual camera itself.  Th...