Abstract: A method for controlling a co-presence virtual environment for a first user and a second user includes: determining a first avatar's restricted space in the co-presence virtual environment, the first avatar correspond to the first user of the co-presence virtual environment; receiving user position data from a first computing device associated with the first user and determining the first avatar's location within the co-presence virtual environment; when the first avatar's location is within the first avatar's restricted space, communicating first co-presence virtual environment modification data to the first computing device; and communicating second co-presence virtual environment modification data to a second computing device associated with the second user.

Abstract: A system and method of operating an audio visual system generating an immersive virtual experience may include generating, by a head-mounted audio visual device, a virtual world immersive experience within a virtual space while physically moving within a physical space, displaying, by the head-mounted audio visual device within the virtual space, a visual target marker indicating a target location in the physical space, receiving, by the head-mounted audio visual device, a teleport control signal, and moving a virtual location of the head-mounted audio visual device within the virtual space from a first virtual location to a second virtual location in response to receiving the teleport control signal.

Abstract: In at least one general aspect, a method can include determining a position of a user in a virtual reality (VR) environment, determining a position of object in the VR environment, defining a vector between the position of the user and the position of the object, and defining an elongated collision volume along the vector. The elongated collision volume may have a medial portion around at least a portion of the object, a proximal portion disposed proximal to the object, and a distal portion disposed proximal to the object. The proximal portion may have a cross-sectional area less than a cross-sectional area of the distal portion.

Abstract: Example methods and apparatus to navigate within virtual-reality (VR) environments are disclosed. A disclosed example method includes defining a reachable portion of a VR environment, defining an unreachable portion of the VR environment separate from the reachable portion, and translating a physical hand location in the reachable portion into a virtual hand location in the unreachable portion.

Abstract: In at least one general aspect, a method can include determining a position of a user in a virtual reality (VR) environment, determining a position of object in the VR environment, defining a vector between the position of the user and the position of the object, and defining an elongated collision volume along the vector. The elongated collision volume may have a medial portion around at least a portion of the object, a proximal portion disposed proximal to the object, and a distal portion disposed proximal to the object. The proximal portion may have a cross-sectional area less than a cross-sectional area of the distal portion.

Abstract: A system and method of operating an audio visual system generating an immersive virtual experience may include generating, by a head-mounted audio visual device, a virtual world immersive experience within a virtual space while physically moving within a physical space, displaying, by the head-mounted audio visual device within the virtual space, a visual target marker indicating a target location in the physical space, receiving, by the head-mounted audio visual device, a teleport control signal, and moving a virtual location of the head-mounted audio visual device within the virtual space from a first virtual location to a second virtual location in response to receiving the teleport control signal.

Abstract: A method for controlling a co-presence virtual environment for a first user and a second user includes: determining a first avatar's restricted space in the co-presence virtual environment, the first avatar correspond to the first user of the co-presence virtual environment; receiving user position data from a first computing device associated with the first user and determining the first avatar's location within the co-presence virtual environment; when the first avatar's location is within the first avatar's restricted space, communicating first co-presence virtual environment modification data to the first computing device; and communicating second co-presence virtual environment modification data to a second computing device associated with the second user.

Abstract: Techniques of computer animation involve embedding a keyframe editor within a virtual reality (VR) controller that displays animation objects within a VR environment on a VR display to enable editing of early keyframes. The keyframe editor allows a user to select a keyframe of an animation sequence for editing using the VR controller. The keyframe may be one that is placed before the end of the animation sequence. The keyframe editor also allows the user to select, via the VR controller, an aspect of the animation object to change within the selected keyframe. When an animation object follows a first trajectory before editing, the keyframe editor may automatically generate a second trajectory that preserves continuity of action.

Abstract: Example methods and apparatus to navigate within virtual-reality (VR) environments are disclosed. A disclosed example method includes defining a reachable portion of a VR environment, defining an unreachable portion of the VR environment separate from the reachable portion, and translating a physical hand location in the reachable portion into a virtual hand location in the unreachable portion.