Abstract: An index creation device reads target text data therein and creates a bitmap index in which, with regard to each of a character or a word and a tag that appear in the target text data, an appearance position of each of the character or the word and the tag in text data is represented as bitmap data.

Abstract: An index creation device reads target text data therein and creates a bitmap index in which, with regard to each of a character or a word and a tag that appear in the target text data, an appearance position of each of the character or the word and the tag in text data is represented as bitmap data.

Abstract: A three-dimensional graphic displaying system and its method allow a viewpoint to a displayed graphic to change when the displayed graphic is rotated or moved. By including a data generating unit for generating scale mark data for respective variable values corresponding to each coordinate axis, as a combination of two or more lines which exist on a plane perpendicular to a coordinate axis, and are not located on an identical straight line; a viewpoint converting unit for converting the generated data into data of a coordinate system which varies depending on a position of a user viewpoint; and a displaying unit for two-dimensionalizing the converted data, and displaying the two-dimensionalized data on a display unit in correspondence with the position of the user viewpoint, the positions of the scale marks can be identified even if the viewpoint exists in an extended portion of the scale marks on the coordinate axis.

Abstract: A graphic display apparatus for rotating a three-dimensional figure about the three axes of the Cartesian coordinate system has a graphic information storing unit for storing graphic information of a three-dimensional object to be displayed, a rotative action indicating unit for indicating rotative actions to rotate the three-dimensional object being displayed about the three axes, a display coordinate calculating unit for calculating coordinates of the three-dimensional object after it is rotated, a rotational angle calculating unit for calculating rotational angles of the three-dimensional object after it is rotated, and a display unit for displaying the three-dimensional object after it is rotated and the calculated rotational angles. The rotational angle calculating unit calculates the rotational angles of the three-dimensional object rotated by the rotative action, as rotational angles from the initial state of the three-dimensional object in a predetermined sequence of three rotative actions.