Abstract
This study aims at the application of the virtual reality technique to model construction and simulation in industrial design and the arts. This paper discusses several problems in the interactive direct manipulation of the virtual object from the viewpoint of real space.
The first point is to realize the representation system which can represent the motion parallax without experiencing the response delay. For this purpose, the reduction of the measurement time for the positions of both eyes is investigated, and the problem is solved by developing the both‐eye position measurement method using position‐sensitive devices (PSD).
The second point is to realize the accurate and direct specification method of manipulation from the real space. The direct specification using the hand or the stylus in the real space makes it difficult to realize an accurate manipulation since the error between the real space and the virtual space coordinates is sensed visually in a direct way. For this problem, a stylus for virtual object manipulation was developed. It has a special structure wherein the grip is in the real space and the pointer is in the virtual space.
By this elaboration, the visual error in the position relation between the pointer and the object to be handled can be eliminated. Then the real‐time processing is investigated for the decision of contact between the stylus pointer and the virtual object to be manipulated, as well as for the generation of the tactile sensation.
The real‐time processing is realized by utilizing the feature of the virtual pointer stylus and the drawing mechanism.