Abstract: The present invention provides a processing system for enabling modifications to be made to a virtual design in a CAD system, in particular a collaborative CAD system with a number of spatially distributed users. An indication is constantly provided as to the degrees of freedom of the components involved in any modification and the effects on the degrees of freedom of any changes to be made.

Abstract: The invention relates to the transmission of image data during which first image data are continuously generated by a first computer (PC1) and are or can be displayed in the form of a first temporal sequence of first images on an image display device of the first computer. At least a partial number of the first images are continuously acquired and corresponding second image data are generated therefrom and transmitted to a compression device (CO). The second image data are compressed by the compression device for a data transmission whereby resulting in the generation of third image data, whereby second image data are continuously taken into consideration during compression that correspond to a portion of the first sequence with a number of the first images. The third image data are output to a data transmission device (PR) that generates data transmission signals corresponding to the third image data.

Abstract: Apparatus that uses a large transflective mirror to extend a virtual reality system such as a virtual table that employs a projection plane to produce the virtual reality. The transflexive mirror is positioned relative to the projection plane such that the plane of the mirror intersects the projection plane and the angle of the mirror relative to the projection plane is such that the user of the system who looks at the mirror sees the projection plane reflected in the mirror. The virtual reality system is responsive to the position of the mirror and the direction in which a user is looking and produces separate virtual realities on the projection plane: one when the user is looking at the mirror and another when the user is looking at the projection plane. The virtual reality that the user sees when looking at the mirror may or may not be coherent with the virtual reality that the user sees when looking at the projection plane.

Abstract: Apparatus that uses a large transflective mirror to extend a virtual reality system such as a virtual table that employs a projection plane to produce the virtual reality. The transflexive mirror is positioned relative to the projection plane such that the plane of the mirror intersects the projection plane and the angle of the mirror relative to the projection plane is such that the user of the system who looks at the mirror sees the projection plane reflected in the mirror. The virtual reality system is responsive to the position of the mirror and the direction in which a user is looking and produces separate virtual realities on the projection plane: one when the user is looking at the mirror and another when the user is looking at the projection plane The virtual reality that the user sees when looking at the mirror may or may not be coherent with the virtual reality that the user sees when looking at the projection plane.

Abstract: The present invention provides a processing system for enabling modifications to be made to a virtual design in a CAD system, in particular a collaborative CAD system with a number of spatially distributed users. An indication is constantly provided as to the degrees of freedom of the components involved in any modification and the effects on the degrees of freedom of any changes to be made.