Abstract: A method, apparatus, and system provide the ability to control navigation of a three-dimensional (3D) computer aided design (CAD) model in an augmented reality space. The 3D CAD model is rendered in the augmented reality space and appears as if it is present in a physical space at true scale. A virtual camera is defined as fixed to a current pose of a user's head. A virtual line segment S is constructed coincident with a ray R from a center of projection P of the virtual camera and a center pixel of the virtual camera. A check for geometric intersections between the virtual line segment S and surfaces of scene elements is conducted. Upon intersecting with a part of the model, a gaze cursor is rendered at an intersection point C closest to the center of projection P.

Abstract: The present invention relates to securely and autonomously synchronizing data on geographically distributed computers. In one embodiment of the present invention, data is distributed from a central server to geographically distributed clients. In another embodiment, data is encrypted and securely transmitted over a computer network. One embodiment uses the Secure Sockets Layer protocol to secure transmitted data. In this embodiment, the data is transmitted via the Internet. In another embodiment of the present invention, data is distributed in real-time. In this embodiment, data is provided to a user as the data updates without the user making a specific request for updated data. In another embodiment, portions of data are made available to only authorized users. In this embodiment an administrator sets permissions to control which data is transmitted to a user. In another embodiment, the transmission of data is secure in both directions.