| 摘要 |
<p>PURPOSE:To easily indicate coordinates in a three-dimensional space on a CRT screen by displaying the coordinate axes of a real coordinate system for displaying a graphic form, a plane perpendicular to the coordinate axes, and a cursor which moves on the plane. CONSTITUTION:A plane display means 306 outputs data for displaying the plane which are perpendicular to the real coordinate axes of the three- dimensional space and include said coordinate values, and a cursor display means 307 reads display range data out of a display range storage device 303 and coordinate value data out of a coordinate value storage means 305, and outputs data for displaying the cursor indicating the coordinate values on the plane. A coordinate axis display means 308 outputs data for displaying the coordinate axes of the real coordinate system and a projection converting means 309 performs the projection conversion of the plane display data, cursor display data, and coordinate axis display data and outputs the converted data to a CRT display 310. Consequently, the coordinates in the three-dimensional space can easily be indicated over a look at the CRT screen.</p> |
