| 摘要 |
PURPOSE:To exactly indicate a three-dimensional area, and to improve an operating efficiency by providing a coordinate system setting part, cursor control part, and volume element calculating part. CONSTITUTION:A coordinate system setting part 1 sets a coordinate system or the size of the grid by the indication of an input indicating device 5, and transmits grid point data to a grid point managing part 33 in an area indicating part 3. Then, a three-dimensional graphic is prepared, and the three-dimensional area is indicated to it. A user operates a dial operation on the device 5 by referring to a sectional plane on a display screen 4, the coordinate value of the point of an area indication position is indicated, an input indicating device control part 31 decides the coordinate value, and a cursor control part 32 displays the cursor based on this. A volume element calculating part 34 calculates each grid point data by referring to the managing part 33, and searches the three-dimensional area being an object to be indicated. A display control part 2 draws the volume element on the screen 4 by a stereoscopic drawing method. |
