公开(公告)号：JPH03211686A

公开(公告)日：1991-09-17

申请号：JP30423790

申请日：1990-11-13

Applicant: APPLE COMPUTER

Inventor： DANIERU ESU BUENORIA

IPC: G06F3/14 ,  G06F3/0481 ,  G06T15/00 ,  G06T15/60 ,  G09G5/08

Abstract: PURPOSE: To facilitate the three-dimensional movement of an object on a display screen by displaying a shadow area relating to a cursor. CONSTITUTION: In an interactive computer controlled display device, the cursor 2 provided with a, position corresponding to the three-dimensional movement of a cursor controller and provided with at least one edge is displayed on a data display screen 1. Then, the shadow 3 provided with the edge corresponding to the edge of the cursor 2 projected on a two-dimensional shadow plane 4 along a light vector and provided with the position corresponding to the three- dimensional movement of the cursor controller is displayed on the display screen 1. Thus, a user is helped to discriminate the movement and position of the object in a space.