| 摘要 |
<p>PURPOSE:To simply input three-dimensional coordinates by allowing the titled system to interlock with picture display by means of a two-dimensional input device. CONSTITUTION:Two-dimensional moving distances, coordinates, direction, or the like are inputted from a two-dimensional input part 13. A three-dimensional coordinate transformation part 14 allows a vector from Q to Q' determined by two dimensional moving distances dX, dY informed from the input part 13 to correspond to a three-dimensional screen coordinate system 21 on the screen of a display device 11 and selects two coordinate axes which are the closest in the screen coordinate system 21. Namely, the range of the direction of two-dimensional movement is determined out of I-VI, the coordinate axes to be the boundary of the ranged are selected and the vector decomposition of the two-dimensional moving distances dX, dY is executed on the basis of the two coordinate axes. The decomposed result is transformed into three- dimensional moving distances dX, dY, dZ. Thus, a display 22 displaying P P' on a display device is executed on the basis of the three-dimensional moving distances.</p> |
